Merge pull request #438 from Naveen3Singh/feature_schedule_send

Add schedule send feature

app/src/main/AndroidManifest.xml

@@ -11,6 +11,7 @@
     <uses-permission android:name="android.permission.RECEIVE_MMS" />
     <uses-permission android:name="android.provider.Telephony.SMS_RECEIVED" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
 
@@ -212,6 +213,10 @@
             </intent-filter>
         </receiver>
 
+        <receiver
+            android:name=".receivers.ScheduledMessageReceiver"
+            android:exported="false" />
+
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.provider"

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/MainActivity.kt

@@ -36,7 +36,6 @@ import org.greenrobot.eventbus.Subscribe
 import org.greenrobot.eventbus.ThreadMode
 import java.io.FileOutputStream
 import java.io.OutputStream
-import java.util.*
 
 class MainActivity : SimpleActivity() {
     private val MAKE_DEFAULT_APP_REQUEST = 1
@@ -208,42 +207,62 @@ class MainActivity : SimpleActivity() {
                 setupConversations(conversations)
                 getNewConversations(conversations)
             }
+            conversations.forEach {
+                clearExpiredScheduledMessages(it.threadId)
+            }
         }
     }
 
     private fun getNewConversations(cachedConversations: ArrayList<Conversation>) {
-        val privateCursor = getMyContactsCursor(false, true)
+        val privateCursor = getMyContactsCursor(favoritesOnly = false, withPhoneNumbersOnly = true)
         ensureBackgroundThread {
             val privateContacts = MyContactsContentProvider.getSimpleContacts(this, privateCursor)
             val conversations = getConversations(privateContacts = privateContacts)
 
-            runOnUiThread {
-                setupConversations(conversations)
-            }
-
             conversations.forEach { clonedConversation ->
-                if (!cachedConversations.map { it.threadId }.contains(clonedConversation.threadId)) {
+                val threadIds = cachedConversations.map { it.threadId }
+                if (!threadIds.contains(clonedConversation.threadId)) {
                     conversationsDB.insertOrUpdate(clonedConversation)
                     cachedConversations.add(clonedConversation)
                 }
             }
 
             cachedConversations.forEach { cachedConversation ->
-                if (!conversations.map { it.threadId }.contains(cachedConversation.threadId)) {
-                    conversationsDB.deleteThreadId(cachedConversation.threadId)
+                val threadId = cachedConversation.threadId
+
+                val isTemporaryThread = cachedConversation.isScheduled
+                val isConversationDeleted = !conversations.map { it.threadId }.contains(threadId)
+                if (isConversationDeleted && !isTemporaryThread) {
+                    conversationsDB.deleteThreadId(threadId)
+                }
+
+                val newConversation = conversations.find { it.phoneNumber == cachedConversation.phoneNumber }
+                if (isTemporaryThread && newConversation != null) {
+                    // delete the original temporary thread and move any scheduled messages to the new thread
+                    conversationsDB.deleteThreadId(threadId)
+                    messagesDB.getScheduledThreadMessages(threadId)
+                        .forEach { message ->
+                            messagesDB.insertOrUpdate(message.copy(threadId = newConversation.threadId))
+                        }
                 }
             }
 
-            cachedConversations.forEach { cachedConversation ->
-                val conv = conversations.firstOrNull { it.threadId == cachedConversation.threadId && it.toString() != cachedConversation.toString() }
+            cachedConversations.forEach { cachedConv ->
+                val conv = conversations.find { it.threadId == cachedConv.threadId && !cachedConv.areContentsTheSame(it) }
                 if (conv != null) {
-                    conversationsDB.insertOrUpdate(conv)
+                    val conversation = conv.copy(date = maxOf(cachedConv.date, conv.date))
+                    conversationsDB.insertOrUpdate(conversation)
                 }
             }
 
+            val allConversations = conversationsDB.getAll() as ArrayList<Conversation>
+            runOnUiThread {
+                setupConversations(allConversations)
+            }
+
             if (config.appRunCount == 1) {
                 conversations.map { it.threadId }.forEach { threadId ->
-                    val messages = getMessages(threadId, false)
+                    val messages = getMessages(threadId, getImageResolutions = false, includeScheduledMessages = false)
                     messages.chunked(30).forEach { currentMessages ->
                         messagesDB.insertMessages(*currentMessages.toTypedArray())
                     }
@@ -273,8 +292,9 @@ class MainActivity : SimpleActivity() {
             hideKeyboard()
             ConversationsAdapter(this, sortedConversations, conversations_list) {
                 Intent(this, ThreadActivity::class.java).apply {
-                    putExtra(THREAD_ID, (it as Conversation).threadId)
-                    putExtra(THREAD_TITLE, it.title)
+                    val conversation = it as Conversation
+                    putExtra(THREAD_ID, conversation.threadId)
+                    putExtra(THREAD_TITLE, conversation.title)
                     startActivity(this)
                 }
             }.apply {
@@ -313,7 +333,7 @@ class MainActivity : SimpleActivity() {
 
             val manager = getSystemService(ShortcutManager::class.java)
             try {
-                manager.dynamicShortcuts = Arrays.asList(newConversation)
+                manager.dynamicShortcuts = listOf(newConversation)
                 config.lastHandledShortcutColor = appIconColor
             } catch (ignored: Exception) {
             }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -13,10 +13,16 @@ import android.os.Bundle
 import android.provider.ContactsContract
 import android.provider.MediaStore
 import android.provider.Telephony
+import android.provider.Telephony.Sms.MESSAGE_TYPE_QUEUED
+import android.provider.Telephony.Sms.STATUS_NONE
 import android.telephony.SmsManager
 import android.telephony.SmsMessage
 import android.telephony.SubscriptionInfo
 import android.text.TextUtils
+import android.text.format.DateUtils
+import android.text.format.DateUtils.FORMAT_NO_YEAR
+import android.text.format.DateUtils.FORMAT_SHOW_DATE
+import android.text.format.DateUtils.FORMAT_SHOW_TIME
 import android.util.TypedValue
 import android.view.Gravity
 import android.view.View
@@ -25,6 +31,7 @@ import android.view.inputmethod.EditorInfo
 import android.widget.LinearLayout
 import android.widget.LinearLayout.LayoutParams
 import android.widget.RelativeLayout
+import androidx.core.content.res.ResourcesCompat
 import com.bumptech.glide.Glide
 import com.bumptech.glide.load.DataSource
 import com.bumptech.glide.load.engine.DiskCacheStrategy
@@ -37,8 +44,6 @@ import com.bumptech.glide.request.RequestOptions
 import com.bumptech.glide.request.target.Target
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
-import com.klinker.android.send_message.Transaction
-import com.klinker.android.send_message.Utils.getNumPages
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
 import com.simplemobiletools.commons.dialogs.RadioGroupDialog
 import com.simplemobiletools.commons.extensions.*
@@ -50,17 +55,17 @@ import com.simplemobiletools.commons.views.MyRecyclerView
 import com.simplemobiletools.smsmessenger.R
 import com.simplemobiletools.smsmessenger.adapters.AutoCompleteTextViewAdapter
 import com.simplemobiletools.smsmessenger.adapters.ThreadAdapter
+import com.simplemobiletools.smsmessenger.dialogs.ScheduleSendDialog
 import com.simplemobiletools.smsmessenger.extensions.*
 import com.simplemobiletools.smsmessenger.helpers.*
 import com.simplemobiletools.smsmessenger.models.*
-import com.simplemobiletools.smsmessenger.receivers.SmsStatusDeliveredReceiver
-import com.simplemobiletools.smsmessenger.receivers.SmsStatusSentReceiver
 import kotlinx.android.synthetic.main.activity_thread.*
 import kotlinx.android.synthetic.main.item_attachment.view.*
 import kotlinx.android.synthetic.main.item_selected_contact.view.*
 import org.greenrobot.eventbus.EventBus
 import org.greenrobot.eventbus.Subscribe
 import org.greenrobot.eventbus.ThreadMode
+import org.joda.time.DateTime
 import java.io.File
 import java.io.InputStream
 import java.io.OutputStream
@@ -74,6 +79,10 @@ class ThreadActivity : SimpleActivity() {
     private val TYPE_TAKE_PHOTO = 12
     private val TYPE_CHOOSE_PHOTO = 13
 
+    private val TYPE_EDIT = 14
+    private val TYPE_SEND = 15
+    private val TYPE_DELETE = 16
+
     private var threadId = 0L
     private var currentSIMCardIndex = 0
     private var isActivityVisible = false
@@ -92,6 +101,10 @@ class ThreadActivity : SimpleActivity() {
     private var allMessagesFetched = false
     private var oldestMessageDate = -1
 
+    private var isScheduledMessage: Boolean = false
+    private var scheduledMessage: Message? = null
+    private lateinit var scheduledDateTime: DateTime
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_thread)
@@ -227,6 +240,8 @@ class ThreadActivity : SimpleActivity() {
             } catch (e: Exception) {
                 ArrayList()
             }
+            clearExpiredScheduledMessages(threadId, messages)
+            messages.removeAll { it.isScheduled && it.millis() < System.currentTimeMillis() }
 
             messages.sortBy { it.date }
             if (messages.size > MESSAGES_LIMIT) {
@@ -258,8 +273,8 @@ class ThreadActivity : SimpleActivity() {
             val cachedMessagesCode = messages.clone().hashCode()
             messages = getMessages(threadId, true)
 
-            val hasParticipantWithoutName = participants.any {
-                it.phoneNumbers.map { it.normalizedNumber }.contains(it.name)
+            val hasParticipantWithoutName = participants.any { contact ->
+                contact.phoneNumbers.map { it.normalizedNumber }.contains(contact.name)
             }
 
             try {
@@ -325,11 +340,13 @@ class ThreadActivity : SimpleActivity() {
 
             val currAdapter = thread_messages_list.adapter
             if (currAdapter == null) {
-                ThreadAdapter(this, threadItems, thread_messages_list) {
-                    (it as? ThreadError)?.apply {
-                        thread_type_message.setText(it.messageText)
-                    }
-                }.apply {
+                ThreadAdapter(
+                    activity = this,
+                    messages = threadItems,
+                    recyclerView = thread_messages_list,
+                    itemClick = { handleItemClick(it) },
+                    onThreadIdUpdate = { threadId = it }
+                ).apply {
                     thread_messages_list.adapter = this
                 }
 
@@ -371,6 +388,13 @@ class ThreadActivity : SimpleActivity() {
         }
     }
 
+    private fun handleItemClick(any: Any) {
+        when {
+            any is Message && any.isScheduled -> showScheduledMessageInfo(any)
+            any is ThreadError -> thread_type_message.setText(any.messageText)
+        }
+    }
+
     private fun fetchNextMessages() {
         if (messages.isEmpty() || allMessagesFetched || loadingOlderMessages) {
             return
@@ -425,6 +449,12 @@ class ThreadActivity : SimpleActivity() {
         thread_send_message.setOnClickListener {
             sendMessage()
         }
+        thread_send_message.setOnLongClickListener {
+            if (!isScheduledMessage) {
+                launchScheduleSendDialog()
+            }
+            true
+        }
 
         thread_send_message.isClickable = false
         thread_type_message.onTextChangeListener {
@@ -468,6 +498,8 @@ class ThreadActivity : SimpleActivity() {
                 addAttachment(it)
             }
         }
+
+        setupScheduleSendUi()
     }
 
     private fun setupAttachmentSizes() {
@@ -580,8 +612,7 @@ class ThreadActivity : SimpleActivity() {
 
         val defaultSmsSubscriptionId = SmsManager.getDefaultSmsSubscriptionId()
         val systemPreferredSimIdx = if (defaultSmsSubscriptionId >= 0) {
-            val defaultSmsSIM = subscriptionManagerCompat().getActiveSubscriptionInfo(defaultSmsSubscriptionId)
-            availableSIMs.indexOfFirstOrNull { it.subscriptionId == defaultSmsSIM.subscriptionId }
+            availableSIMs.indexOfFirstOrNull { it.subscriptionId == defaultSmsSubscriptionId }
         } else {
             null
         }
@@ -590,13 +621,7 @@ class ThreadActivity : SimpleActivity() {
     }
 
     private fun blockNumber() {
-        val numbers = ArrayList<String>()
-        participants.forEach {
-            it.phoneNumbers.forEach {
-                numbers.add(it.normalizedNumber)
-            }
-        }
-
+        val numbers = participants.getAddresses()
         val numbersString = TextUtils.join(", ", numbers)
         val question = String.format(resources.getString(R.string.block_confirmation), numbersString)
 
@@ -909,9 +934,11 @@ class ThreadActivity : SimpleActivity() {
 
     private fun checkSendMessageAvailability() {
         if (thread_type_message.text!!.isNotEmpty() || (attachmentSelections.isNotEmpty() && !attachmentSelections.values.any { it.isPending })) {
+            thread_send_message.isEnabled = true
             thread_send_message.isClickable = true
             thread_send_message.alpha = 0.9f
         } else {
+            thread_send_message.isEnabled = false
             thread_send_message.isClickable = false
             thread_send_message.alpha = 0.4f
         }
@@ -919,57 +946,69 @@ class ThreadActivity : SimpleActivity() {
     }
 
     private fun sendMessage() {
-        var msg = thread_type_message.value
-        if (msg.isEmpty() && attachmentSelections.isEmpty()) {
+        var text = thread_type_message.value
+        if (text.isEmpty() && attachmentSelections.isEmpty()) {
             showErrorToast(getString(R.string.unknown_error_occurred))
             return
         }
 
-        msg = removeDiacriticsIfNeeded(msg)
+        text = removeDiacriticsIfNeeded(text)
 
-        val numbers = ArrayList<String>()
-        participants.forEach { contact ->
-            contact.phoneNumbers.forEach {
-                numbers.add(it.normalizedNumber)
-            }
+        val subscriptionId = availableSIMCards.getOrNull(currentSIMCardIndex)?.subscriptionId ?: SmsManager.getDefaultSmsSubscriptionId()
+
+        if (isScheduledMessage) {
+            sendScheduledMessage(text, subscriptionId)
+        } else {
+            sendNormalMessage(text, subscriptionId)
+        }
+    }
+
+    private fun sendScheduledMessage(text: String, subscriptionId: Int) {
+        if (scheduledDateTime.millis < System.currentTimeMillis() + 1000L) {
+            toast(R.string.must_pick_time_in_the_future)
+            launchScheduleSendDialog(scheduledDateTime)
+            return
         }
 
-        val settings = getSendMessageSettings()
-        val currentSubscriptionId = availableSIMCards.getOrNull(currentSIMCardIndex)?.subscriptionId
-        if (currentSubscriptionId != null) {
-            settings.subscriptionId = currentSubscriptionId
-        }
-
-        val transaction = Transaction(this, settings)
-        val message = com.klinker.android.send_message.Message(msg, numbers.toTypedArray())
-
-        if (attachmentSelections.isNotEmpty()) {
-            for (selection in attachmentSelections.values) {
-                try {
-                    val byteArray = contentResolver.openInputStream(selection.uri)?.readBytes() ?: continue
-                    val mimeType = contentResolver.getType(selection.uri) ?: continue
-                    message.addMedia(byteArray, mimeType)
-                } catch (e: Exception) {
-                    showErrorToast(e)
-                } catch (e: Error) {
-                    showErrorToast(e.localizedMessage ?: getString(R.string.unknown_error_occurred))
+        refreshedSinceSent = false
+        try {
+            ensureBackgroundThread {
+                val messageId = scheduledMessage?.id ?: generateRandomId()
+                val message = buildScheduledMessage(text, subscriptionId, messageId)
+                if (messages.isEmpty()) {
+                    // create a temporary thread until a real message is sent
+                    threadId = message.threadId
+                    createTemporaryThread(message, message.threadId)
                 }
+                messagesDB.insertOrUpdate(message)
+                val conversation = conversationsDB.getConversationWithThreadId(threadId)
+                if (conversation != null) {
+                    val nowSeconds = (System.currentTimeMillis() / 1000).toInt()
+                    conversationsDB.insertOrUpdate(conversation.copy(date = nowSeconds))
+                }
+                scheduleMessage(message)
             }
+            clearCurrentMessage()
+            hideScheduleSendUi()
+            scheduledMessage = null
+
+            if (!refreshedSinceSent) {
+                refreshMessages()
+            }
+        } catch (e: Exception) {
+            showErrorToast(e.localizedMessage ?: getString(R.string.unknown_error_occurred))
         }
+    }
+
+    private fun sendNormalMessage(text: String, subscriptionId: Int) {
+        val addresses = participants.getAddresses()
+        val attachments = attachmentSelections.values
+            .map { it.uri }
 
         try {
-            val smsSentIntent = Intent(this, SmsStatusSentReceiver::class.java)
-            val deliveredIntent = Intent(this, SmsStatusDeliveredReceiver::class.java)
-
-            transaction.setExplicitBroadcastForSentSms(smsSentIntent)
-            transaction.setExplicitBroadcastForDeliveredSms(deliveredIntent)
-
             refreshedSinceSent = false
-            transaction.sendNewMessage(message)
-            thread_type_message.setText("")
-            attachmentSelections.clear()
-            thread_attachments_holder.beGone()
-            thread_attachments_wrapper.removeAllViews()
+            sendMessage(text, addresses, subscriptionId, attachments)
+            clearCurrentMessage()
 
             if (!refreshedSinceSent) {
                 refreshMessages()
@@ -981,6 +1020,13 @@ class ThreadActivity : SimpleActivity() {
         }
     }
 
+    private fun clearCurrentMessage() {
+        thread_type_message.setText("")
+        attachmentSelections.clear()
+        thread_attachments_holder.beGone()
+        thread_attachments_wrapper.removeAllViews()
+    }
+
     // show selected contacts, properly split to new lines when appropriate
     // based on https://stackoverflow.com/a/13505029/1967672
     private fun showSelectedContact(views: ArrayList<View>) {
@@ -997,16 +1043,16 @@ class ThreadActivity : SimpleActivity() {
         var isFirstRow = true
 
         for (i in views.indices) {
-            val LL = LinearLayout(this)
-            LL.orientation = LinearLayout.HORIZONTAL
-            LL.gravity = Gravity.CENTER_HORIZONTAL or Gravity.BOTTOM
-            LL.layoutParams = LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)
+            val layout = LinearLayout(this)
+            layout.orientation = LinearLayout.HORIZONTAL
+            layout.gravity = Gravity.CENTER_HORIZONTAL or Gravity.BOTTOM
+            layout.layoutParams = LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)
             views[i].measure(0, 0)
 
             var params = LayoutParams(views[i].measuredWidth, LayoutParams.WRAP_CONTENT)
             params.setMargins(0, 0, mediumMargin, 0)
-            LL.addView(views[i], params)
-            LL.measure(0, 0)
+            layout.addView(views[i], params)
+            layout.measure(0, 0)
             widthSoFar += views[i].measuredWidth + mediumMargin
 
             val checkWidth = if (isFirstRow) firstRowWidth else parentWidth
@@ -1016,15 +1062,15 @@ class ThreadActivity : SimpleActivity() {
                 newLinearLayout = LinearLayout(this)
                 newLinearLayout.layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)
                 newLinearLayout.orientation = LinearLayout.HORIZONTAL
-                params = LayoutParams(LL.measuredWidth, LL.measuredHeight)
+                params = LayoutParams(layout.measuredWidth, layout.measuredHeight)
                 params.topMargin = mediumMargin
-                newLinearLayout.addView(LL, params)
-                widthSoFar = LL.measuredWidth
+                newLinearLayout.addView(layout, params)
+                widthSoFar = layout.measuredWidth
             } else {
                 if (!isFirstRow) {
-                    (LL.layoutParams as LayoutParams).topMargin = mediumMargin
+                    (layout.layoutParams as LayoutParams).topMargin = mediumMargin
                 }
-                newLinearLayout.addView(LL)
+                newLinearLayout.addView(layout)
             }
         }
         selected_contacts.addView(newLinearLayout)
@@ -1125,16 +1171,26 @@ class ThreadActivity : SimpleActivity() {
             notificationManager.cancel(threadId.hashCode())
         }
 
-        val lastMaxId = messages.maxByOrNull { it.id }?.id ?: 0L
-        messages = getMessages(threadId, true)
+        val newThreadId = getThreadId(participants.getAddresses().toSet())
+        val newMessages = getMessages(newThreadId, false)
+        messages = if (messages.all { it.isScheduled } && newMessages.isNotEmpty()) {
+            threadId = newThreadId
+            // update scheduled messages with real thread id
+            updateScheduledMessagesThreadId(messages, newThreadId)
+            getMessages(newThreadId, true)
+        } else {
+            getMessages(threadId, true)
+        }
+
+        val lastMaxId = messages.filterNot { it.isScheduled }.maxByOrNull { it.id }?.id ?: 0L
 
         messages.filter { !it.isReceivedMessage() && it.id > lastMaxId }.forEach { latestMessage ->
             // subscriptionIds seem to be not filled out at sending with multiple SIM cards, so fill it manually
             if ((subscriptionManagerCompat().activeSubscriptionInfoList?.size ?: 0) > 1) {
-                val SIMId = availableSIMCards.getOrNull(currentSIMCardIndex)?.subscriptionId
-                if (SIMId != null) {
-                    updateMessageSubscriptionId(latestMessage.id, SIMId)
-                    latestMessage.subscriptionId = SIMId
+                val subscriptionId = availableSIMCards.getOrNull(currentSIMCardIndex)?.subscriptionId
+                if (subscriptionId != null) {
+                    updateMessageSubscriptionId(latestMessage.id, subscriptionId)
+                    latestMessage.subscriptionId = subscriptionId
                 }
             }
 
@@ -1145,12 +1201,15 @@ class ThreadActivity : SimpleActivity() {
         setupSIMSelector()
     }
 
-    private fun updateMessageType() {
-        val settings = getSendMessageSettings()
-        val text = thread_type_message.text.toString()
+    private fun isMmsMessage(text: String): Boolean {
         val isGroupMms = participants.size > 1 && config.sendGroupMessageMMS
-        val isLongMmsMessage = getNumPages(settings, text) > settings.sendLongAsMmsAfter && config.sendLongMessageMMS
-        val stringId = if (attachmentSelections.isNotEmpty() || isGroupMms || isLongMmsMessage) {
+        val isLongMmsMessage = isLongMmsMessage(text) && config.sendLongMessageMMS
+        return attachmentSelections.isNotEmpty() || isGroupMms || isLongMmsMessage
+    }
+
+    private fun updateMessageType() {
+        val text = thread_type_message.text.toString()
+        val stringId = if (isMmsMessage(text)) {
             R.string.mms
         } else {
             R.string.sms
@@ -1166,4 +1225,143 @@ class ThreadActivity : SimpleActivity() {
         }
         return File.createTempFile("IMG_", ".jpg", outputDirectory)
     }
+
+    private fun showScheduledMessageInfo(message: Message) {
+        val items = arrayListOf(
+            RadioItem(TYPE_EDIT, getString(R.string.update_message)),
+            RadioItem(TYPE_SEND, getString(R.string.send_now)),
+            RadioItem(TYPE_DELETE, getString(R.string.delete))
+        )
+        RadioGroupDialog(activity = this, items = items, titleId = R.string.scheduled_message) {
+            when (it as Int) {
+                TYPE_DELETE -> cancelScheduledMessageAndRefresh(message.id)
+                TYPE_EDIT -> editScheduledMessage(message)
+                TYPE_SEND -> {
+                    extractAttachments(message)
+                    sendNormalMessage(message.body, message.subscriptionId)
+                    cancelScheduledMessageAndRefresh(message.id)
+                }
+            }
+        }
+    }
+
+    private fun extractAttachments(message: Message) {
+        val messageAttachment = message.attachment
+        if (messageAttachment != null) {
+            for (attachment in messageAttachment.attachments) {
+                addAttachment(attachment.getUri())
+            }
+        }
+    }
+
+    private fun editScheduledMessage(message: Message) {
+        scheduledMessage = message
+        clearCurrentMessage()
+        thread_type_message.setText(message.body)
+        extractAttachments(message)
+        scheduledDateTime = DateTime(message.millis())
+        showScheduleSendUi()
+    }
+
+    private fun cancelScheduledMessageAndRefresh(messageId: Long) {
+        ensureBackgroundThread {
+            deleteScheduledMessage(messageId)
+            cancelScheduleSendPendingIntent(messageId)
+            refreshMessages()
+        }
+    }
+
+    private fun launchScheduleSendDialog(originalDt: DateTime? = null) {
+        ScheduleSendDialog(this, originalDt) { newDt ->
+            if (newDt != null) {
+                scheduledDateTime = newDt
+                showScheduleSendUi()
+            }
+        }
+    }
+
+    private fun setupScheduleSendUi() {
+        val textColor = getProperTextColor()
+        scheduled_message_holder.background.applyColorFilter(getProperBackgroundColor().getContrastColor())
+        scheduled_message_button.apply {
+            val clockDrawable = ResourcesCompat.getDrawable(resources, R.drawable.ic_clock_vector, theme)?.apply { applyColorFilter(textColor) }
+            setCompoundDrawablesWithIntrinsicBounds(clockDrawable, null, null, null)
+            setTextColor(textColor)
+            setOnClickListener {
+                launchScheduleSendDialog(scheduledDateTime)
+            }
+        }
+
+        discard_scheduled_message.apply {
+            applyColorFilter(textColor)
+            setOnClickListener {
+                hideScheduleSendUi()
+                if (scheduledMessage != null) {
+                    cancelScheduledMessageAndRefresh(scheduledMessage!!.id)
+                    scheduledMessage = null
+                }
+            }
+        }
+    }
+
+    private fun showScheduleSendUi() {
+        isScheduledMessage = true
+        updateSendButtonDrawable()
+        scheduled_message_holder.beVisible()
+
+        val dt = scheduledDateTime
+        val millis = dt.millis
+        scheduled_message_button.text = if (dt.yearOfCentury().get() > DateTime.now().yearOfCentury().get()) {
+            millis.formatDate(this)
+        } else {
+            val flags = FORMAT_SHOW_TIME or FORMAT_SHOW_DATE or FORMAT_NO_YEAR
+            DateUtils.formatDateTime(this, millis, flags)
+        }
+    }
+
+    private fun hideScheduleSendUi() {
+        isScheduledMessage = false
+        scheduled_message_holder.beGone()
+        updateSendButtonDrawable()
+    }
+
+    private fun updateSendButtonDrawable() {
+        val drawableResId = if (isScheduledMessage) {
+            R.drawable.ic_schedule_send_vector
+        } else {
+            R.drawable.ic_send_vector
+        }
+        ResourcesCompat.getDrawable(resources, drawableResId, theme)?.apply {
+            applyColorFilter(getProperTextColor())
+            thread_send_message.setCompoundDrawablesWithIntrinsicBounds(null, this, null, null)
+        }
+    }
+
+    private fun buildScheduledMessage(text: String, subscriptionId: Int, messageId: Long): Message {
+        val threadId = if (messages.isEmpty()) messageId else threadId
+        return Message(
+            id = messageId,
+            body = text,
+            type = MESSAGE_TYPE_QUEUED,
+            status = STATUS_NONE,
+            participants = participants,
+            date = (scheduledDateTime.millis / 1000).toInt(),
+            read = false,
+            threadId = threadId,
+            isMMS = isMmsMessage(text),
+            attachment = buildMessageAttachment(text, messageId),
+            senderName = "",
+            senderPhotoUri = "",
+            subscriptionId = subscriptionId,
+            isScheduled = true
+        )
+    }
+
+    private fun buildMessageAttachment(text: String, messageId: Long): MessageAttachment {
+        val attachments = attachmentSelections.values
+            .map { Attachment(null, messageId, it.uri.toString(), contentResolver.getType(it.uri) ?: "*/*", 0, 0, "") }
+            .toArrayList()
+
+        return MessageAttachment(messageId, text, attachments)
+    }
 }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/ConversationsAdapter.kt

@@ -173,7 +173,7 @@ class ConversationsAdapter(
         }
 
         try {
-            conversations.removeAll(conversationsToRemove)
+            conversations.removeAll(conversationsToRemove.toSet())
         } catch (ignored: Exception) {
         }
 
@@ -319,15 +319,16 @@ class ConversationsAdapter(
                 setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize * 0.8f)
             }
 
-            if (conversation.read) {
-                conversation_address.setTypeface(null, Typeface.NORMAL)
-                conversation_body_short.setTypeface(null, Typeface.NORMAL)
+            val style = if (conversation.read) {
                 conversation_body_short.alpha = 0.7f
+                if (conversation.isScheduled) Typeface.ITALIC else Typeface.NORMAL
             } else {
-                conversation_address.setTypeface(null, Typeface.BOLD)
-                conversation_body_short.setTypeface(null, Typeface.BOLD)
                 conversation_body_short.alpha = 1f
+                if (conversation.isScheduled) Typeface.BOLD_ITALIC else Typeface.BOLD
+
             }
+            conversation_address.setTypeface(null, style)
+            conversation_body_short.setTypeface(null, style)
 
             arrayListOf<TextView>(conversation_address, conversation_body_short, conversation_date).forEach {
                 it.setTextColor(textColor)

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/ThreadAdapter.kt

@@ -4,10 +4,10 @@ import android.annotation.SuppressLint
 import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.graphics.Color
+import android.graphics.Typeface
 import android.graphics.drawable.ColorDrawable
 import android.graphics.drawable.Drawable
 import android.net.Uri
-import android.telephony.SubscriptionManager
 import android.util.TypedValue
 import android.view.Menu
 import android.view.View
@@ -40,15 +40,21 @@ import com.simplemobiletools.smsmessenger.models.*
 import kotlinx.android.synthetic.main.item_attachment_image.view.*
 import kotlinx.android.synthetic.main.item_attachment_vcard.view.*
 import kotlinx.android.synthetic.main.item_received_message.view.*
+import kotlinx.android.synthetic.main.item_received_message.view.thread_mesage_attachments_holder
+import kotlinx.android.synthetic.main.item_received_message.view.thread_message_body
+import kotlinx.android.synthetic.main.item_received_message.view.thread_message_holder
+import kotlinx.android.synthetic.main.item_received_message.view.thread_message_play_outline
 import kotlinx.android.synthetic.main.item_received_unknown_attachment.view.*
+import kotlinx.android.synthetic.main.item_sent_message.view.*
 import kotlinx.android.synthetic.main.item_sent_unknown_attachment.view.*
 import kotlinx.android.synthetic.main.item_thread_date_time.view.*
 import kotlinx.android.synthetic.main.item_thread_error.view.*
 import kotlinx.android.synthetic.main.item_thread_sending.view.*
 import kotlinx.android.synthetic.main.item_thread_success.view.*
+import java.util.*
 
 class ThreadAdapter(
-    activity: SimpleActivity, var messages: ArrayList<ThreadItem>, recyclerView: MyRecyclerView, itemClick: (Any) -> Unit
+    activity: SimpleActivity, var messages: ArrayList<ThreadItem>, recyclerView: MyRecyclerView, itemClick: (Any) -> Unit, val onThreadIdUpdate: (Long) -> Unit
 ) : MyRecyclerViewAdapter(activity, recyclerView, itemClick) {
     private var fontSize = activity.getTextSize()
 
@@ -199,11 +205,21 @@ class ThreadAdapter(
         messagesToRemove.forEach {
             activity.deleteMessage((it as Message).id, it.isMMS)
         }
-        messages.removeAll(messagesToRemove)
+        messages.removeAll(messagesToRemove.toSet())
         activity.updateLastConversationMessage(threadId)
 
+        val messages = messages.filterIsInstance<Message>()
+        if (messages.isNotEmpty() && messages.all { it.isScheduled }) {
+            // move all scheduled messages to a temporary thread as there are no real messages left
+            val message = messages.last()
+            val newThreadId = generateRandomId()
+            activity.createTemporaryThread(message, newThreadId)
+            activity.updateScheduledMessagesThreadId(messages, newThreadId)
+            onThreadIdUpdate(newThreadId)
+        }
+
         activity.runOnUiThread {
-            if (messages.filter { it is Message }.isEmpty()) {
+            if (messages.isEmpty()) {
                 activity.finish()
             } else {
                 removeSelectedItems(positions)
@@ -252,29 +268,9 @@ class ThreadAdapter(
             thread_message_body.beVisibleIf(message.body.isNotEmpty())
 
             if (message.isReceivedMessage()) {
-                thread_message_sender_photo.beVisible()
-                thread_message_sender_photo.setOnClickListener {
-                    val contact = message.participants.first()
-                    context.getContactFromAddress(contact.phoneNumbers.first().normalizedNumber) {
-                        if (it != null) {
-                            (activity as ThreadActivity).startContactDetailsIntent(it)
-                        }
-                    }
-                }
-                thread_message_body.setTextColor(textColor)
-                thread_message_body.setLinkTextColor(context.getProperPrimaryColor())
-
-                if (!activity.isFinishing && !activity.isDestroyed) {
-                    SimpleContactsHelper(context).loadContactImage(message.senderPhotoUri, thread_message_sender_photo, message.senderName)
-                }
+                setupReceivedMessageView(view, message)
             } else {
-                thread_message_sender_photo?.beGone()
-                val background = context.getProperPrimaryColor()
-                thread_message_body.background.applyColorFilter(background)
-
-                val contrastColor = background.getContrastColor()
-                thread_message_body.setTextColor(contrastColor)
-                thread_message_body.setLinkTextColor(contrastColor)
+                setupSentMessageView(view, message)
             }
 
             thread_message_body.setOnLongClickListener {
@@ -304,6 +300,54 @@ class ThreadAdapter(
         }
     }
 
+    private fun setupReceivedMessageView(view: View, message: Message) {
+        view.apply {
+            thread_message_sender_photo.beVisible()
+            thread_message_sender_photo.setOnClickListener {
+                val contact = message.participants.first()
+                context.getContactFromAddress(contact.phoneNumbers.first().normalizedNumber) {
+                    if (it != null) {
+                        (activity as ThreadActivity).startContactDetailsIntent(it)
+                    }
+                }
+            }
+            thread_message_body.setTextColor(textColor)
+            thread_message_body.setLinkTextColor(context.getProperPrimaryColor())
+
+            if (!activity.isFinishing && !activity.isDestroyed) {
+                SimpleContactsHelper(context).loadContactImage(message.senderPhotoUri, thread_message_sender_photo, message.senderName)
+            }
+        }
+    }
+
+    private fun setupSentMessageView(view: View, message: Message) {
+        view.apply {
+            thread_message_sender_photo?.beGone()
+            val background = context.getProperPrimaryColor()
+            thread_message_body.background.applyColorFilter(background)
+
+            val contrastColor = background.getContrastColor()
+            thread_message_body.setTextColor(contrastColor)
+            thread_message_body.setLinkTextColor(contrastColor)
+
+            val padding = thread_message_body.paddingStart
+            if (message.isScheduled) {
+                thread_message_scheduled_icon.beVisible()
+                thread_message_scheduled_icon.applyColorFilter(contrastColor)
+
+                val iconWidth = resources.getDimensionPixelSize(R.dimen.small_icon_size)
+                val rightPadding = padding + iconWidth
+                thread_message_body.setPadding(padding, padding, rightPadding, padding)
+                thread_message_body.typeface = Typeface.create(Typeface.DEFAULT, Typeface.ITALIC)
+            } else {
+                thread_message_scheduled_icon.beGone()
+
+                thread_message_body.setPadding(padding, padding, padding, padding)
+                thread_message_body.typeface = Typeface.DEFAULT
+            }
+        }
+    }
+
     private fun setupImageView(holder: ViewHolder, parent: View, message: Message, attachment: Attachment) {
         val mimetype = attachment.mimetype
         val uri = attachment.getUri()
@@ -461,7 +505,7 @@ class ThreadAdapter(
     private fun launchViewIntent(uri: Uri, mimetype: String, filename: String) {
         Intent().apply {
             action = Intent.ACTION_VIEW
-            setDataAndType(uri, mimetype.toLowerCase())
+            setDataAndType(uri, mimetype.lowercase(Locale.getDefault()))
             addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
 
             try {

app/src/main/kotlin/com/simplemobiletools/smsmessenger/databases/MessagesDatabase.kt

@@ -17,7 +17,7 @@ import com.simplemobiletools.smsmessenger.models.Conversation
 import com.simplemobiletools.smsmessenger.models.Message
 import com.simplemobiletools.smsmessenger.models.MessageAttachment
 
-@Database(entities = [Conversation::class, Attachment::class, MessageAttachment::class, Message::class], version = 4)
+@Database(entities = [Conversation::class, Attachment::class, MessageAttachment::class, Message::class], version = 5)
 @TypeConverters(Converters::class)
 abstract class MessagesDatabase : RoomDatabase() {
 
@@ -41,6 +41,7 @@ abstract class MessagesDatabase : RoomDatabase() {
                             .addMigrations(MIGRATION_1_2)
                             .addMigrations(MIGRATION_2_3)
                             .addMigrations(MIGRATION_3_4)
+                            .addMigrations(MIGRATION_4_5)
                             .build()
                     }
                 }
@@ -66,8 +67,10 @@ abstract class MessagesDatabase : RoomDatabase() {
                 database.apply {
                     execSQL("CREATE TABLE conversations_new (`thread_id` INTEGER NOT NULL PRIMARY KEY, `snippet` TEXT NOT NULL, `date` INTEGER NOT NULL, `read` INTEGER NOT NULL, `title` TEXT NOT NULL, `photo_uri` TEXT NOT NULL, `is_group_conversation` INTEGER NOT NULL, `phone_number` TEXT NOT NULL)")
 
-                    execSQL("INSERT OR IGNORE INTO conversations_new (thread_id, snippet, date, read, title, photo_uri, is_group_conversation, phone_number) " +
-                            "SELECT thread_id, snippet, date, read, title, photo_uri, is_group_conversation, phone_number FROM conversations")
+                    execSQL(
+                        "INSERT OR IGNORE INTO conversations_new (thread_id, snippet, date, read, title, photo_uri, is_group_conversation, phone_number) " +
+                            "SELECT thread_id, snippet, date, read, title, photo_uri, is_group_conversation, phone_number FROM conversations"
+                    )
 
                     execSQL("DROP TABLE conversations")
 
@@ -85,5 +88,14 @@ abstract class MessagesDatabase : RoomDatabase() {
                 }
             }
         }
+
+        private val MIGRATION_4_5 = object : Migration(4, 5) {
+            override fun migrate(database: SupportSQLiteDatabase) {
+                database.apply {
+                    execSQL("ALTER TABLE messages ADD COLUMN is_scheduled INTEGER NOT NULL DEFAULT 0")
+                    execSQL("ALTER TABLE conversations ADD COLUMN is_scheduled INTEGER NOT NULL DEFAULT 0")
+                }
+            }
+        }
     }
 }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/ScheduleSendDialog.kt

@@ -0,0 +1,155 @@
+package com.simplemobiletools.smsmessenger.dialogs
+
+import android.app.DatePickerDialog
+import android.app.DatePickerDialog.OnDateSetListener
+import android.app.TimePickerDialog
+import android.app.TimePickerDialog.OnTimeSetListener
+import android.text.format.DateFormat
+import androidx.appcompat.app.AlertDialog
+import com.simplemobiletools.commons.activities.BaseSimpleActivity
+import com.simplemobiletools.commons.extensions.*
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.extensions.config
+import com.simplemobiletools.smsmessenger.extensions.roundToClosestMultipleOf
+import kotlinx.android.synthetic.main.schedule_message_dialog.view.*
+import org.joda.time.DateTime
+import java.util.*
+
+class ScheduleSendDialog(private val activity: BaseSimpleActivity, private var dateTime: DateTime? = null, private val callback: (dt: DateTime?) -> Unit) {
+    private val view = activity.layoutInflater.inflate(R.layout.schedule_message_dialog, null)
+    private val textColor = activity.getProperTextColor()
+
+    private var previewDialog: AlertDialog? = null
+    private var previewShown = false
+    private var isNewMessage = dateTime == null
+
+    private val calendar = Calendar.getInstance()
+
+    init {
+        arrayOf(view.subtitle, view.edit_time, view.edit_date).forEach { it.setTextColor(textColor) }
+        arrayOf(view.dateIcon, view.timeIcon).forEach { it.applyColorFilter(textColor) }
+        view.edit_date.setOnClickListener { showDatePicker() }
+        view.edit_time.setOnClickListener { showTimePicker() }
+        updateTexts(dateTime ?: DateTime.now().plusHours(1))
+
+        if (isNewMessage) {
+            showDatePicker()
+        } else {
+            showPreview()
+        }
+    }
+
+    private fun updateTexts(dt: DateTime) {
+        val dateFormat = activity.config.dateFormat
+        val timeFormat = activity.getTimeFormat()
+        view.edit_date.text = dt.toString(dateFormat)
+        view.edit_time.text = dt.toString(timeFormat)
+    }
+
+    private fun showPreview() {
+        if (previewShown) return
+        activity.getAlertDialogBuilder()
+            .setPositiveButton(R.string.ok, null)
+            .setNegativeButton(R.string.cancel, null)
+            .apply {
+                previewShown = true
+                activity.setupDialogStuff(view, this, R.string.schedule_send) { dialog ->
+                    previewDialog = dialog
+                    dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
+                        if (validateDateTime()) {
+                            callback(dateTime)
+                            dialog.dismiss()
+                        }
+                    }
+                    dialog.setOnDismissListener {
+                        previewShown = false
+                        previewDialog = null
+                    }
+                }
+            }
+    }
+
+    private fun showDatePicker() {
+        val year = dateTime?.year ?: calendar.get(Calendar.YEAR)
+        val monthOfYear = dateTime?.monthOfYear?.minus(1) ?: calendar.get(Calendar.MONTH)
+        val dayOfMonth = dateTime?.dayOfMonth ?: calendar.get(Calendar.DAY_OF_MONTH)
+
+        val dateSetListener = OnDateSetListener { _, y, m, d -> dateSet(y, m, d) }
+        DatePickerDialog(
+            activity, activity.getDatePickerDialogTheme(), dateSetListener, year, monthOfYear, dayOfMonth
+        ).apply {
+            datePicker.minDate = System.currentTimeMillis()
+            show()
+            getButton(AlertDialog.BUTTON_NEGATIVE).apply {
+                text = activity.getString(R.string.back)
+                setOnClickListener {
+                    showPreview()
+                    dismiss()
+                }
+            }
+        }
+    }
+
+    private fun showTimePicker() {
+        val hourOfDay = dateTime?.hourOfDay ?: getNextHour()
+        val minute = dateTime?.minuteOfHour ?: getNextMinute()
+
+        val timeSetListener = OnTimeSetListener { _, h, m -> timeSet(h, m) }
+        TimePickerDialog(
+            activity, activity.getDatePickerDialogTheme(), timeSetListener, hourOfDay, minute, DateFormat.is24HourFormat(activity)
+        ).apply {
+            show()
+            getButton(AlertDialog.BUTTON_NEGATIVE).apply {
+                text = activity.getString(R.string.back)
+                setOnClickListener {
+                    showPreview()
+                    dismiss()
+                }
+            }
+        }
+    }
+
+    private fun dateSet(year: Int, monthOfYear: Int, dayOfMonth: Int) {
+        if (isNewMessage) {
+            showTimePicker()
+        }
+
+        dateTime = DateTime.now()
+            .withDate(year, monthOfYear + 1, dayOfMonth)
+            .run {
+                if (dateTime != null) {
+                    withTime(dateTime!!.hourOfDay, dateTime!!.minuteOfHour, 0, 0)
+                } else {
+                    withTime(getNextHour(), getNextMinute(), 0, 0)
+                }
+            }
+        if (!isNewMessage) {
+            validateDateTime()
+        }
+        isNewMessage = false
+        updateTexts(dateTime!!)
+    }
+
+    private fun timeSet(hourOfDay: Int, minute: Int) {
+        dateTime = dateTime?.withHourOfDay(hourOfDay)?.withMinuteOfHour(minute)
+        if (validateDateTime()) {
+            updateTexts(dateTime!!)
+            showPreview()
+        } else {
+            showTimePicker()
+        }
+    }
+
+    private fun validateDateTime(): Boolean {
+        return if (dateTime?.isAfterNow == false) {
+            activity.toast(R.string.must_pick_time_in_the_future)
+            false
+        } else {
+            true
+        }
+    }
+
+    private fun getNextHour() = (calendar.get(Calendar.HOUR_OF_DAY) + 1).coerceIn(0, 23)
+
+    private fun getNextMinute() = (calendar.get(Calendar.MINUTE) + 5).roundToClosestMultipleOf(5).coerceIn(0, 59)
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/ArrayList.kt

@@ -1,6 +0,0 @@
-package com.simplemobiletools.smsmessenger.extensions
-
-import android.text.TextUtils
-import com.simplemobiletools.commons.models.SimpleContact
-
-fun ArrayList<SimpleContact>.getThreadTitle() = TextUtils.join(", ", map { it.name }.toTypedArray())

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Collections.kt

@@ -30,3 +30,5 @@ fun Map<String, Any>.toContentValues(): ContentValues {
 
     return contentValues
 }
+
+fun <T> Collection<T>.toArrayList() = ArrayList(this)

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt

@@ -26,7 +26,6 @@ import android.telephony.SubscriptionManager
 import android.text.TextUtils
 import androidx.core.app.NotificationCompat
 import androidx.core.app.RemoteInput
-import com.klinker.android.send_message.Settings
 import com.klinker.android.send_message.Transaction.getAddressSeparator
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.*
@@ -58,7 +57,7 @@ val Context.messageAttachmentsDB: MessageAttachmentsDao get() = getMessagesDB().
 
 val Context.messagesDB: MessagesDao get() = getMessagesDB().MessagesDao()
 
-fun Context.getMessages(threadId: Long, getImageResolutions: Boolean, dateFrom: Int = -1): ArrayList<Message> {
+fun Context.getMessages(threadId: Long, getImageResolutions: Boolean, dateFrom: Int = -1, includeScheduledMessages: Boolean = true): ArrayList<Message> {
     val uri = Sms.CONTENT_URI
     val projection = arrayOf(
         Sms._ID,
@@ -117,8 +116,21 @@ fun Context.getMessages(threadId: Long, getImageResolutions: Boolean, dateFrom:
     }
 
     messages.addAll(getMMS(threadId, getImageResolutions, sortOrder))
-    messages = messages.filter { it.participants.isNotEmpty() }
-        .sortedWith(compareBy<Message> { it.date }.thenBy { it.id }).toMutableList() as ArrayList<Message>
+
+    if (includeScheduledMessages) {
+        try {
+            val scheduledMessages = messagesDB.getScheduledThreadMessages(threadId)
+            messages.addAll(scheduledMessages)
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+
+    messages = messages
+        .filter { it.participants.isNotEmpty() }
+        .filterNot { it.isScheduled && it.millis() < System.currentTimeMillis() }
+        .sortedWith(compareBy<Message> { it.date }.thenBy { it.id })
+        .toMutableList() as ArrayList<Message>
 
     return messages
 }
@@ -570,7 +582,11 @@ fun Context.deleteConversation(threadId: Long) {
     }
 
     uri = Mms.CONTENT_URI
-    contentResolver.delete(uri, selection, selectionArgs)
+    try {
+        contentResolver.delete(uri, selection, selectionArgs)
+    } catch (e: Exception) {
+        e.printStackTrace()
+    }
 
     conversationsDB.deleteThreadId(threadId)
     messagesDB.deleteThreadMessages(threadId)
@@ -588,6 +604,14 @@ fun Context.deleteMessage(id: Long, isMMS: Boolean) {
     }
 }
 
+fun Context.deleteScheduledMessage(messageId: Long) {
+    try {
+        messagesDB.delete(messageId)
+    } catch (e: Exception) {
+        showErrorToast(e)
+    }
+}
+
 fun Context.markMessageRead(id: Long, isMMS: Boolean) {
     val uri = if (isMMS) Mms.CONTENT_URI else Sms.CONTENT_URI
     val contentValues = ContentValues().apply {
@@ -972,16 +996,6 @@ fun Context.getFileSizeFromUri(uri: Uri): Long {
     }
 }
 
-fun Context.getSendMessageSettings(): Settings {
-    val settings = Settings()
-    settings.useSystemSending = true
-    settings.deliveryReports = config.enableDeliveryReports
-    settings.sendLongAsMms = config.sendLongMessageMMS
-    settings.sendLongAsMmsAfter = 1
-    settings.group = config.sendGroupMessageMMS
-    return settings
-}
-
 // fix a glitch at enabling Release version minifying from 5.12.3
 // reset messages in 5.14.3 again, as PhoneNumber is no longer minified
 fun Context.clearAllMessagesIfNeeded() {
@@ -1001,3 +1015,52 @@ fun Context.subscriptionManagerCompat(): SubscriptionManager {
         SubscriptionManager.from(this)
     }
 }
+
+fun Context.createTemporaryThread(message: Message, threadId: Long = generateRandomId()) {
+    val simpleContactHelper = SimpleContactsHelper(this)
+    val addresses = message.participants.getAddresses()
+    val photoUri = if (addresses.size == 1) simpleContactHelper.getPhotoUriFromPhoneNumber(addresses.first()) else ""
+
+    val conversation = Conversation(
+        threadId = threadId,
+        snippet = message.body,
+        date = message.date,
+        read = true,
+        title = message.participants.getThreadTitle(),
+        photoUri = photoUri,
+        isGroupConversation = addresses.size > 1,
+        phoneNumber = addresses.first(),
+        isScheduled = true
+    )
+    try {
+        conversationsDB.insertOrUpdate(conversation)
+    } catch (e: Exception) {
+        e.printStackTrace()
+    }
+}
+
+fun Context.updateScheduledMessagesThreadId(messages: List<Message>, newThreadId: Long) {
+    val scheduledMessages = messages.map { it.copy(threadId = newThreadId) }.toTypedArray()
+    messagesDB.insertMessages(*scheduledMessages)
+}
+
+fun Context.clearExpiredScheduledMessages(threadId: Long, messagesToDelete: List<Message>? = null) {
+    val messages = messagesToDelete ?: messagesDB.getScheduledThreadMessages(threadId)
+    val now = System.currentTimeMillis() + 500L
+
+    try {
+        messages.filter { it.isScheduled && it.millis() < now }.forEach { msg ->
+            messagesDB.delete(msg.id)
+        }
+        if (messages.filterNot { it.isScheduled && it.millis() < now }.isEmpty()) {
+            // delete empty temporary thread
+            val conversation = conversationsDB.getConversationWithThreadId(threadId)
+            if (conversation != null && conversation.isScheduled) {
+                conversationsDB.deleteThreadId(threadId)
+            }
+        }
+    } catch (e: Exception) {
+        e.printStackTrace()
+        return
+    }
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Math.kt

@@ -0,0 +1,8 @@
+package com.simplemobiletools.smsmessenger.extensions
+
+import kotlin.math.roundToInt
+
+/**
+ * Returns the closest number divisible by [multipleOf].
+ */
+fun Int.roundToClosestMultipleOf(multipleOf: Int = 1) = (toDouble() / multipleOf).roundToInt() * multipleOf

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/SimpleContact.kt

@@ -0,0 +1,8 @@
+package com.simplemobiletools.smsmessenger.extensions
+
+import android.text.TextUtils
+import com.simplemobiletools.commons.models.SimpleContact
+
+fun ArrayList<SimpleContact>.getThreadTitle(): String = TextUtils.join(", ", map { it.name }.toTypedArray()).orEmpty()
+
+fun ArrayList<SimpleContact>.getAddresses() = flatMap { it.phoneNumbers }.map { it.normalizedNumber }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/gson/JsonElement.kt

@@ -4,7 +4,6 @@ import com.google.gson.*
 import java.math.BigDecimal
 import java.math.BigInteger
 
-
 val JsonElement.optString: String?
     get() = safeConversion { asString }
 

app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt

@@ -29,11 +29,14 @@ const val IMPORT_SMS = "import_sms"
 const val IMPORT_MMS = "import_mms"
 const val WAS_DB_CLEARED = "was_db_cleared_2"
 const val EXTRA_VCARD_URI = "vcard"
+const val SCHEDULED_MESSAGE_ID = "scheduled_message_id"
 
 private const val PATH = "com.simplemobiletools.smsmessenger.action."
 const val MARK_AS_READ = PATH + "mark_as_read"
 const val REPLY = PATH + "reply"
 
+const val DATE_FORMAT_PATTERN = "dd MMM, YYYY"
+
 // view types for the thread list view
 const val THREAD_DATE_TIME = 1
 const val THREAD_RECEIVED_MESSAGE = 2

app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Messaging.kt

@@ -0,0 +1,111 @@
+package com.simplemobiletools.smsmessenger.helpers
+
+import android.app.AlarmManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Handler
+import android.os.Looper
+import androidx.core.app.AlarmManagerCompat
+import com.klinker.android.send_message.Settings
+import com.klinker.android.send_message.Transaction
+import com.klinker.android.send_message.Utils
+import com.simplemobiletools.commons.extensions.showErrorToast
+import com.simplemobiletools.commons.helpers.isMarshmallowPlus
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.extensions.config
+import com.simplemobiletools.smsmessenger.models.Message
+import com.simplemobiletools.smsmessenger.receivers.ScheduledMessageReceiver
+import com.simplemobiletools.smsmessenger.receivers.SmsStatusDeliveredReceiver
+import com.simplemobiletools.smsmessenger.receivers.SmsStatusSentReceiver
+import org.joda.time.DateTime
+import org.joda.time.DateTimeZone
+import kotlin.math.abs
+import kotlin.random.Random
+
+fun Context.getSendMessageSettings(): Settings {
+    val settings = Settings()
+    settings.useSystemSending = true
+    settings.deliveryReports = config.enableDeliveryReports
+    settings.sendLongAsMms = config.sendLongMessageMMS
+    settings.sendLongAsMmsAfter = 1
+    settings.group = config.sendGroupMessageMMS
+    return settings
+}
+
+fun Context.sendMessage(text: String, addresses: List<String>, subscriptionId: Int?, attachments: List<Uri>) {
+    val settings = getSendMessageSettings()
+    if (subscriptionId != null) {
+        settings.subscriptionId = subscriptionId
+    }
+
+    val transaction = Transaction(this, settings)
+    val message = com.klinker.android.send_message.Message(text, addresses.toTypedArray())
+
+    if (attachments.isNotEmpty()) {
+        for (uri in attachments) {
+            try {
+                val byteArray = contentResolver.openInputStream(uri)?.readBytes() ?: continue
+                val mimeType = contentResolver.getType(uri) ?: continue
+                message.addMedia(byteArray, mimeType)
+            } catch (e: Exception) {
+                showErrorToast(e)
+            } catch (e: Error) {
+                showErrorToast(e.localizedMessage ?: getString(R.string.unknown_error_occurred))
+            }
+        }
+    }
+
+    val smsSentIntent = Intent(this, SmsStatusSentReceiver::class.java)
+    val deliveredIntent = Intent(this, SmsStatusDeliveredReceiver::class.java)
+
+    transaction.setExplicitBroadcastForSentSms(smsSentIntent)
+    transaction.setExplicitBroadcastForDeliveredSms(deliveredIntent)
+    Handler(Looper.getMainLooper()).post {
+        transaction.sendNewMessage(message)
+    }
+}
+
+fun Context.getScheduleSendPendingIntent(message: Message): PendingIntent {
+    val intent = Intent(this, ScheduledMessageReceiver::class.java)
+    intent.putExtra(THREAD_ID, message.threadId)
+    intent.putExtra(SCHEDULED_MESSAGE_ID, message.id)
+
+    var flags = PendingIntent.FLAG_UPDATE_CURRENT
+    if (isMarshmallowPlus()) {
+        flags = flags or PendingIntent.FLAG_IMMUTABLE
+    }
+
+    return PendingIntent.getBroadcast(this, message.id.toInt(), intent, flags)
+}
+
+fun Context.scheduleMessage(message: Message) {
+    val pendingIntent = getScheduleSendPendingIntent(message)
+    val triggerAtMillis = message.millis()
+
+    val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
+    AlarmManagerCompat.setExactAndAllowWhileIdle(alarmManager, AlarmManager.RTC_WAKEUP, triggerAtMillis, pendingIntent)
+}
+
+fun Context.cancelScheduleSendPendingIntent(messageId: Long) {
+    val intent = Intent(this, ScheduledMessageReceiver::class.java)
+    var flags = PendingIntent.FLAG_UPDATE_CURRENT
+    if (isMarshmallowPlus()) {
+        flags = flags or PendingIntent.FLAG_IMMUTABLE
+    }
+
+    PendingIntent.getBroadcast(this, messageId.toInt(), intent, flags).cancel()
+}
+
+fun Context.isLongMmsMessage(text: String): Boolean {
+    val settings = getSendMessageSettings()
+    return Utils.getNumPages(settings, text) > settings.sendLongAsMmsAfter
+}
+
+/** Not to be used with real messages persisted in the telephony db. This is for internal use only (e.g. scheduled messages). */
+fun generateRandomId(length: Int = 9): Long {
+    val millis = DateTime.now(DateTimeZone.UTC).millis
+    val random = abs(Random(millis).nextLong())
+    return random.toString().takeLast(length).toLong()
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/interfaces/ConversationsDao.kt

@@ -14,6 +14,9 @@ interface ConversationsDao {
     @Query("SELECT * FROM conversations")
     fun getAll(): List<Conversation>
 
+    @Query("SELECT * FROM conversations WHERE thread_id = :threadId")
+    fun getConversationWithThreadId(threadId: Long): Conversation?
+
     @Query("SELECT * FROM conversations WHERE read = 0")
     fun getUnreadConversations(): List<Conversation>
 

app/src/main/kotlin/com/simplemobiletools/smsmessenger/interfaces/MessagesDao.kt

@@ -23,6 +23,12 @@ interface MessagesDao {
     @Query("SELECT * FROM messages WHERE thread_id = :threadId")
     fun getThreadMessages(threadId: Long): List<Message>
 
+    @Query("SELECT * FROM messages WHERE thread_id = :threadId AND is_scheduled = 1")
+    fun getScheduledThreadMessages(threadId: Long): List<Message>
+
+    @Query("SELECT * FROM messages WHERE thread_id = :threadId AND id = :messageId AND is_scheduled = 1")
+    fun getScheduledMessageWithId(threadId: Long, messageId: Long): Message
+
     @Query("SELECT * FROM messages WHERE body LIKE :text")
     fun getMessagesWithText(text: String): List<Message>
 

app/src/main/kotlin/com/simplemobiletools/smsmessenger/models/Conversation.kt

@@ -14,5 +14,17 @@ data class Conversation(
     @ColumnInfo(name = "title") var title: String,
     @ColumnInfo(name = "photo_uri") var photoUri: String,
     @ColumnInfo(name = "is_group_conversation") var isGroupConversation: Boolean,
-    @ColumnInfo(name = "phone_number") var phoneNumber: String
-)
+    @ColumnInfo(name = "phone_number") var phoneNumber: String,
+    @ColumnInfo(name = "is_scheduled") var isScheduled: Boolean = false
+) {
+
+    fun areContentsTheSame(other: Conversation): Boolean {
+        return snippet == other.snippet &&
+            date == other.date &&
+            read == other.read &&
+            title == other.title &&
+            photoUri == other.photoUri &&
+            isGroupConversation == other.isGroupConversation &&
+            phoneNumber == other.phoneNumber
+    }
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/models/Message.kt

@@ -20,7 +20,11 @@ data class Message(
     @ColumnInfo(name = "attachment") val attachment: MessageAttachment?,
     @ColumnInfo(name = "sender_name") var senderName: String,
     @ColumnInfo(name = "sender_photo_uri") val senderPhotoUri: String,
-    @ColumnInfo(name = "subscription_id") var subscriptionId: Int) : ThreadItem() {
+    @ColumnInfo(name = "subscription_id") var subscriptionId: Int,
+    @ColumnInfo(name = "is_scheduled") var isScheduled: Boolean = false
+) : ThreadItem() {
 
     fun isReceivedMessage() = type == Telephony.Sms.MESSAGE_TYPE_INBOX
+
+    fun millis() = date * 1000L
 }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/receivers/DirectReplyReceiver.kt

@@ -4,7 +4,6 @@ import android.annotation.SuppressLint
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.telephony.SubscriptionManager
 import androidx.core.app.RemoteInput
 import com.klinker.android.send_message.Transaction
 import com.simplemobiletools.commons.extensions.notificationManager
@@ -14,6 +13,7 @@ import com.simplemobiletools.smsmessenger.extensions.*
 import com.simplemobiletools.smsmessenger.helpers.REPLY
 import com.simplemobiletools.smsmessenger.helpers.THREAD_ID
 import com.simplemobiletools.smsmessenger.helpers.THREAD_NUMBER
+import com.simplemobiletools.smsmessenger.helpers.getSendMessageSettings
 
 class DirectReplyReceiver : BroadcastReceiver() {
     @SuppressLint("MissingPermission")

app/src/main/kotlin/com/simplemobiletools/smsmessenger/receivers/ScheduledMessageReceiver.kt

@@ -0,0 +1,58 @@
+package com.simplemobiletools.smsmessenger.receivers
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.PowerManager
+import com.simplemobiletools.commons.extensions.showErrorToast
+import com.simplemobiletools.commons.helpers.ensureBackgroundThread
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.extensions.conversationsDB
+import com.simplemobiletools.smsmessenger.extensions.deleteScheduledMessage
+import com.simplemobiletools.smsmessenger.extensions.getAddresses
+import com.simplemobiletools.smsmessenger.extensions.messagesDB
+import com.simplemobiletools.smsmessenger.helpers.SCHEDULED_MESSAGE_ID
+import com.simplemobiletools.smsmessenger.helpers.THREAD_ID
+import com.simplemobiletools.smsmessenger.helpers.refreshMessages
+import com.simplemobiletools.smsmessenger.helpers.sendMessage
+
+class ScheduledMessageReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        val powerManager = context.getSystemService(Context.POWER_SERVICE) as PowerManager
+        val wakelock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "simple.messenger:scheduled.message.receiver")
+        wakelock.acquire(3000)
+
+
+        ensureBackgroundThread {
+            handleIntent(context, intent)
+        }
+    }
+
+    private fun handleIntent(context: Context, intent: Intent) {
+        val threadId = intent.getLongExtra(THREAD_ID, 0L)
+        val messageId = intent.getLongExtra(SCHEDULED_MESSAGE_ID, 0L)
+        val message = try {
+            context.messagesDB.getScheduledMessageWithId(threadId, messageId)
+        } catch (e: Exception) {
+            e.printStackTrace()
+            return
+        }
+
+        val addresses = message.participants.getAddresses()
+        val attachments = message.attachment?.attachments?.mapNotNull { it.getUri() } ?: emptyList()
+
+        try {
+            context.sendMessage(message.body, addresses, message.subscriptionId, attachments)
+
+            // delete temporary conversation and message as it's already persisted to the telephony db now
+            context.deleteScheduledMessage(messageId)
+            context.conversationsDB.deleteThreadId(messageId)
+            refreshMessages()
+        } catch (e: Exception) {
+            context.showErrorToast(e)
+        } catch (e: Error) {
+            context.showErrorToast(e.localizedMessage ?: context.getString(R.string.unknown_error_occurred))
+        }
+    }
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/services/HeadlessSmsSendService.kt

@@ -4,8 +4,7 @@ import android.app.Service
 import android.content.Intent
 import android.net.Uri
 import com.klinker.android.send_message.Transaction
-import com.simplemobiletools.smsmessenger.extensions.getSendMessageSettings
-import com.simplemobiletools.smsmessenger.extensions.getThreadId
+import com.simplemobiletools.smsmessenger.helpers.getSendMessageSettings
 import com.simplemobiletools.smsmessenger.receivers.SmsStatusDeliveredReceiver
 import com.simplemobiletools.smsmessenger.receivers.SmsStatusSentReceiver
 

app/src/main/res/drawable/ic_calendar_month_vector.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M19,4h-1V2h-2v2H8V2H6v2H5C3.89,4 3.01,4.9 3.01,6L3,20c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2V6C21,4.9 20.1,4 19,4zM19,20H5V10h14V20zM9,14H7v-2h2V14zM13,14h-2v-2h2V14zM17,14h-2v-2h2V14zM9,18H7v-2h2V18zM13,18h-2v-2h2V18zM17,18h-2v-2h2V18z" />
+</vector>

app/src/main/res/drawable/ic_schedule_send_vector.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:autoMirrored="true"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M16.5,12.5L15,12.5v4l3,2 0.75,-1.23 -2.25,-1.52L16.5,12.5zM16,9L2,3v7l9,2 -9,2v7l7.27,-3.11C10.09,20.83 12.79,23 16,23c3.86,0 7,-3.14 7,-7s-3.14,-7 -7,-7zM16,21c-2.75,0 -4.98,-2.22 -5,-4.97v-0.07c0.02,-2.74 2.25,-4.97 5,-4.97 2.76,0 5,2.24 5,5S18.76,21 16,21z" />
+</vector>

app/src/main/res/layout/activity_thread.xml

@@ -117,9 +117,12 @@
                 android:layout_height="match_parent"
                 android:clipToPadding="false"
                 android:overScrollMode="ifContentScrolls"
+                android:paddingBottom="@dimen/small_margin"
                 android:scrollbars="none"
                 app:layoutManager="com.simplemobiletools.commons.views.MyLinearLayoutManager"
-                app:stackFromEnd="true" />
+                app:stackFromEnd="true"
+                tools:itemCount="3"
+                tools:listitem="@layout/item_sent_message" />
 
         </com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller>
 
@@ -127,7 +130,7 @@
             android:id="@+id/message_divider"
             android:layout_width="match_parent"
             android:layout_height="1px"
-            android:layout_above="@+id/thread_attachments_holder"
+            android:layout_above="@+id/scheduled_message_holder"
             android:background="@color/divider_grey"
             android:importantForAccessibility="no" />
 
@@ -145,13 +148,57 @@
             android:padding="@dimen/normal_margin"
             android:src="@drawable/ic_plus_vector" />
 
+        <RelativeLayout
+            android:id="@+id/scheduled_message_holder"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_above="@+id/thread_attachments_holder"
+            android:layout_alignStart="@id/thread_type_message"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:layout_marginEnd="@dimen/medium_margin"
+            android:layout_marginBottom="@dimen/small_margin"
+            android:background="@drawable/section_holder_stroke"
+            android:visibility="gone"
+            tools:visibility="visible">
+
+            <com.simplemobiletools.commons.views.MyTextView
+                android:id="@+id/scheduled_message_button"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_alignParentStart="true"
+                android:layout_alignParentEnd="true"
+                android:background="?selectableItemBackgroundBorderless"
+                android:clickable="true"
+                android:drawableStart="@drawable/ic_clock_vector"
+                android:drawablePadding="@dimen/normal_margin"
+                android:focusable="true"
+                android:gravity="center_vertical"
+                android:minHeight="@dimen/normal_icon_size"
+                android:paddingStart="@dimen/normal_margin"
+                android:paddingEnd="48dp"
+                android:text="Tomorrow at 6PM GMT +05:30"
+                android:textSize="@dimen/middle_text_size"
+                tools:ignore="HardcodedText" />
+
+            <ImageView
+                android:id="@+id/discard_scheduled_message"
+                android:layout_width="@dimen/normal_icon_size"
+                android:layout_height="@dimen/normal_icon_size"
+                android:layout_alignParentEnd="true"
+                android:background="?selectableItemBackgroundBorderless"
+                android:contentDescription="@string/cancel_schedule_send"
+                android:padding="@dimen/normal_margin"
+                android:src="@drawable/ic_cross_vector" />
+
+        </RelativeLayout>
+
         <HorizontalScrollView
             android:id="@+id/thread_attachments_holder"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_above="@+id/thread_type_message"
             android:layout_alignStart="@+id/thread_type_message"
-            android:layout_marginTop="@dimen/normal_margin"
+            android:layout_marginTop="@dimen/medium_margin"
             android:layout_marginBottom="@dimen/small_margin"
             android:overScrollMode="never"
             android:scrollbars="none"

app/src/main/res/layout/item_sent_message.xml

@@ -48,4 +48,15 @@
             android:textSize="@dimen/normal_text_size"
             tools:text="Sent message" />
     </RelativeLayout>
+
+    <ImageView
+        android:id="@+id/thread_message_scheduled_icon"
+        android:layout_width="@dimen/small_icon_size"
+        android:layout_height="@dimen/small_icon_size"
+        android:layout_margin="@dimen/tiny_margin"
+        android:src="@drawable/ic_clock_vector"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        tools:visibility="visible" />
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/schedule_message_dialog.xml

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/scheduled_message_dialog_holder"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:paddingVertical="@dimen/activity_margin">
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/subtitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="@dimen/activity_margin"
+        android:background="?attr/selectableItemBackground"
+        android:includeFontPadding="false"
+        android:padding="@dimen/tiny_margin"
+        android:text="@string/schedule_send_warning"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <androidx.appcompat.widget.AppCompatImageView
+        android:id="@+id/dateIcon"
+        android:layout_width="@dimen/date_time_icon_size"
+        android:layout_height="@dimen/date_time_icon_size"
+        android:layout_marginStart="@dimen/big_margin"
+        android:layout_marginTop="@dimen/big_margin"
+        android:src="@drawable/ic_calendar_month_vector"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/subtitle" />
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/edit_date"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/medium_margin"
+        android:layout_marginEnd="@dimen/activity_margin"
+        android:background="?attr/selectableItemBackground"
+        android:ellipsize="end"
+        android:includeFontPadding="false"
+        android:padding="@dimen/small_margin"
+        android:textSize="@dimen/date_time_text_size"
+        app:layout_constraintBottom_toBottomOf="@+id/dateIcon"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/dateIcon"
+        app:layout_constraintTop_toTopOf="@+id/dateIcon"
+        tools:text="25 sep, 2022" />
+
+    <androidx.appcompat.widget.AppCompatImageView
+        android:id="@+id/timeIcon"
+        android:layout_width="@dimen/date_time_icon_size"
+        android:layout_height="@dimen/date_time_icon_size"
+        android:layout_marginStart="@dimen/big_margin"
+        android:layout_marginTop="@dimen/big_margin"
+        android:src="@drawable/ic_clock_vector"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/dateIcon" />
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/edit_time"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/medium_margin"
+        android:layout_marginEnd="@dimen/activity_margin"
+        android:background="?attr/selectableItemBackground"
+        android:ellipsize="end"
+        android:includeFontPadding="false"
+        android:padding="@dimen/small_margin"
+        android:textSize="@dimen/date_time_text_size"
+        app:layout_constraintBottom_toBottomOf="@+id/timeIcon"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/timeIcon"
+        app:layout_constraintTop_toTopOf="@+id/timeIcon"
+        tools:text="07:00 AM" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
+

app/src/main/res/values/dimens.xml

@@ -7,4 +7,7 @@
     <dimen name="remove_attachment_size">24dp</dimen>
     <dimen name="pin_icon_size">15dp</dimen>
     <dimen name="vcard_property_start_margin">64dp</dimen>
+    <dimen name="date_time_icon_size">20dp</dimen>
+    <dimen name="date_time_text_size">22sp</dimen>
+    <dimen name="small_icon_size">20dp</dimen>
 </resources>