show a preview of the attached file

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

@@ -3,6 +3,7 @@ package com.simplemobiletools.smsmessenger.activities
 import android.app.Activity
 import android.app.PendingIntent
 import android.content.Intent
+import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.os.Bundle
 import android.provider.Telephony
@@ -16,6 +17,16 @@ import android.view.inputmethod.EditorInfo
 import android.widget.LinearLayout
 import android.widget.LinearLayout.LayoutParams
 import android.widget.RelativeLayout
+import com.bumptech.glide.Glide
+import com.bumptech.glide.load.DataSource
+import com.bumptech.glide.load.engine.DiskCacheStrategy
+import com.bumptech.glide.load.engine.GlideException
+import com.bumptech.glide.load.resource.bitmap.CenterCrop
+import com.bumptech.glide.load.resource.bitmap.RoundedCorners
+import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
+import com.bumptech.glide.request.RequestListener
+import com.bumptech.glide.request.RequestOptions
+import com.bumptech.glide.request.target.Target
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
@@ -185,6 +196,10 @@ class ThreadActivity : SimpleActivity() {
         thread_add_attachment.setOnClickListener {
             launchPickPhotoVideoIntent()
         }
+
+        thread_remove_attachment.setOnClickListener {
+
+        }
     }
 
     private fun blockNumber() {
@@ -293,7 +308,31 @@ class ThreadActivity : SimpleActivity() {
     }
 
     private fun addAttachment(uri: Uri) {
+        val roundedCornersRadius = resources.getDimension(R.dimen.medium_margin).toInt()
+        val options = RequestOptions()
+            .diskCacheStrategy(DiskCacheStrategy.NONE)
+            .transform(CenterCrop(), RoundedCorners(roundedCornersRadius))
 
+        Glide.with(this)
+            .load(uri)
+            .transition(DrawableTransitionOptions.withCrossFade())
+            .apply(options)
+            .listener(object : RequestListener<Drawable> {
+                override fun onLoadFailed(e: GlideException?, model: Any?, target: Target<Drawable>?, isFirstResource: Boolean): Boolean {
+                    thread_attachment_preview.beGone()
+                    thread_remove_attachment.beGone()
+                    showErrorToast(e?.localizedMessage ?: "")
+                    return false
+                }
+
+                override fun onResourceReady(dr: Drawable?, a: Any?, t: Target<Drawable>?, d: DataSource?, i: Boolean): Boolean {
+                    thread_attachment_preview.beVisible()
+                    thread_remove_attachment.beVisible()
+                    return false
+                }
+
+            })
+            .into(thread_attachment_preview)
     }
 
     // show selected contacts, properly split to new lines when appropriate

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

@@ -94,7 +94,7 @@
         android:id="@+id/message_divider"
         android:layout_width="match_parent"
         android:layout_height="1px"
-        android:layout_above="@+id/thread_type_message"
+        android:layout_above="@+id/thread_attachment_preview"
         android:background="@color/divider_grey"
         android:importantForAccessibility="no" />
 
@@ -111,6 +111,26 @@
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_plus_vector" />
 
+    <ImageView
+        android:id="@+id/thread_attachment_preview"
+        android:layout_width="@dimen/attachment_preview_size"
+        android:layout_height="@dimen/attachment_preview_size"
+        android:layout_above="@+id/thread_type_message"
+        android:layout_alignStart="@+id/thread_type_message"
+        android:layout_marginTop="@dimen/normal_margin"
+        android:layout_marginBottom="@dimen/small_margin"
+        android:visibility="gone" />
+
+    <ImageView
+        android:id="@+id/thread_remove_attachment"
+        android:layout_width="@dimen/remove_attachment_size"
+        android:layout_height="@dimen/remove_attachment_size"
+        android:layout_alignTop="@+id/thread_attachment_preview"
+        android:layout_alignEnd="@+id/thread_attachment_preview"
+        android:padding="@dimen/tiny_margin"
+        android:src="@drawable/ic_cross_vector"
+        android:visibility="gone" />
+
     <com.simplemobiletools.commons.views.MyEditText
         android:id="@+id/thread_type_message"
         android:layout_width="match_parent"

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

@@ -4,4 +4,6 @@
     <dimen name="avatar_size">40dp</dimen>
     <dimen name="bigger_avatar_size">64dp</dimen>
     <dimen name="play_outline_size">36dp</dimen>
+    <dimen name="attachment_preview_size">60dp</dimen>
+    <dimen name="remove_attachment_size">24dp</dimen>
 </resources>