use a different placeholder image at group conversations, not a letter

app/build.gradle

@@ -36,7 +36,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.25.6'
+    implementation 'com.simplemobiletools:commons:5.25.7'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta4'
     implementation 'org.greenrobot:eventbus:3.2.0'
     implementation 'com.klinkerapps:android-smsmms:5.2.6'

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

@@ -1,6 +1,7 @@
 package com.simplemobiletools.smsmessenger.adapters
 
 import android.graphics.Typeface
+import android.graphics.drawable.LayerDrawable
 import android.view.Menu
 import android.view.View
 import android.view.ViewGroup
@@ -8,6 +9,7 @@ import android.widget.TextView
 import com.bumptech.glide.Glide
 import com.simplemobiletools.commons.adapters.MyRecyclerViewAdapter
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.formatDateOrTime
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 import com.simplemobiletools.commons.views.FastScroller
@@ -16,6 +18,7 @@ import com.simplemobiletools.smsmessenger.R
 import com.simplemobiletools.smsmessenger.activities.SimpleActivity
 import com.simplemobiletools.smsmessenger.extensions.deleteConversation
 import com.simplemobiletools.smsmessenger.extensions.loadImage
+import com.simplemobiletools.smsmessenger.helpers.letterBackgroundColors
 import com.simplemobiletools.smsmessenger.helpers.refreshMessages
 import com.simplemobiletools.smsmessenger.models.Conversation
 import kotlinx.android.synthetic.main.item_conversation.view.*
@@ -135,7 +138,17 @@ class ConversationsAdapter(
                 it.setTextColor(textColor)
             }
 
-            context.loadImage(conversation.photoUri, conversation_image, conversation.title)
+            // at group conversations we use an icon as the placeholder, not any letter
+            val placeholder = if (conversation.isGroupConversation) {
+                val icon = activity.resources.getDrawable(R.drawable.group_conversation_icon)
+                val bgColor = letterBackgroundColors[Math.abs(conversation.title.hashCode()) % letterBackgroundColors.size].toInt()
+                (icon as LayerDrawable).findDrawableByLayerId(R.id.attendee_circular_background).applyColorFilter(bgColor)
+                icon
+            } else {
+                null
+            }
+
+            context.loadImage(conversation.photoUri, conversation_image, conversation.title, placeholder)
         }
     }
 }

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

@@ -12,6 +12,7 @@ import android.graphics.Bitmap
 import android.graphics.Canvas
 import android.graphics.Paint
 import android.graphics.drawable.BitmapDrawable
+import android.graphics.drawable.Drawable
 import android.media.AudioAttributes
 import android.media.AudioManager
 import android.media.RingtoneManager
@@ -159,7 +160,8 @@ fun Context.getConversations(): ArrayList<Conversation> {
         val names = getThreadContactNames(phoneNumbers)
         val title = TextUtils.join(", ", names.toTypedArray())
         val photoUri = if (phoneNumbers.size == 1) getPhotoUriFromPhoneNumber(phoneNumbers.first()) else ""
-        val conversation = Conversation(id, snippet, date.toInt(), read, title, photoUri)
+        val isGroupConversation = phoneNumbers.size > 1
+        val conversation = Conversation(id, snippet, date.toInt(), read, title, photoUri, isGroupConversation)
         conversations.add(conversation)
     }
     return conversations
@@ -595,8 +597,12 @@ fun Context.getNotificationLetterIcon(name: String): Bitmap {
     return bitmap
 }
 
-fun Context.loadImage(path: String, imageView: ImageView, placeholderName: String) {
+fun Context.loadImage(path: String, imageView: ImageView, placeholderName: String, placeholderImage: Drawable? = null) {
-    val placeholder = BitmapDrawable(resources, getNotificationLetterIcon(placeholderName))
+    val placeholder = if (placeholderImage == null) {
+        BitmapDrawable(resources, getNotificationLetterIcon(placeholderName))
+    } else {
+        placeholderImage
+    }
 
     val options = RequestOptions()
         .diskCacheStrategy(DiskCacheStrategy.RESOURCE)

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

@@ -1,3 +1,6 @@
 package com.simplemobiletools.smsmessenger.models
 
-data class Conversation(val id: Int, val snippet: String, val date: Int, val read: Boolean, val title: String, val photoUri: String)
+data class Conversation(
+    val id: Int, val snippet: String, val date: Int, val read: Boolean, val title: String, val photoUri: String,
+    val isGroupConversation: Boolean
+)

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

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:id="@+id/attendee_circular_background">
+        <shape android:shape="oval">
+            <solid android:color="@color/color_primary" />
+        </shape>
+    </item>
+
+    <item
+        android:bottom="@dimen/medium_margin"
+        android:drawable="@drawable/ic_people_vector"
+        android:left="@dimen/medium_margin"
+        android:right="@dimen/medium_margin"
+        android:top="@dimen/medium_margin" />
+
+</layer-list>