Use EmojiCompat library for backward compatibility

app/build.gradle

@@ -66,6 +66,7 @@ android {
 
 dependencies {
     implementation 'com.github.SimpleMobileTools:Simple-Commons:c05de1687e'
+    implementation 'androidx.emoji2:emoji2-bundled:1.1.0'
 
     kapt 'androidx.room:room-compiler:2.4.2'
     implementation 'androidx.room:room-runtime:2.4.2'

app/src/main/kotlin/com/simplemobiletools/keyboard/App.kt

@@ -1,11 +1,19 @@
 package com.simplemobiletools.keyboard
 
 import android.app.Application
+import androidx.emoji2.bundled.BundledEmojiCompatConfig
+import androidx.emoji2.text.EmojiCompat
 import com.simplemobiletools.commons.extensions.checkUseEnglish
 
 class App : Application() {
     override fun onCreate() {
         super.onCreate()
         checkUseEnglish()
+        setupEmojiCompat()
+    }
+
+    private fun setupEmojiCompat() {
+        val config = BundledEmojiCompatConfig(this)
+        EmojiCompat.init(config)
     }
 }

app/src/main/kotlin/com/simplemobiletools/keyboard/adapters/EmojisAdapter.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.emoji2.text.EmojiCompat
 import androidx.recyclerview.widget.RecyclerView
 import com.simplemobiletools.keyboard.R
 import kotlinx.android.synthetic.main.item_emoji.view.*
@@ -32,7 +33,8 @@ class EmojisAdapter(
     }
 
     private fun setupEmoji(view: View, emoji: String) {
-        view.emoji_value.text = emoji
+        val processed = EmojiCompat.get().process(emoji)
+        view.emoji_value.text = processed
     }
 
     inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

app/src/main/kotlin/com/simplemobiletools/keyboard/services/SimpleKeyboardIME.kt

@@ -45,6 +45,7 @@ class SimpleKeyboardIME : InputMethodService(), MyKeyboardView.OnKeyboardActionL
         keyboardView = keyboardHolder.keyboard_view as MyKeyboardView
         keyboardView!!.setKeyboard(keyboard!!)
         keyboardView!!.setKeyboardHolder(keyboardHolder.keyboard_holder)
+        keyboardView!!.setEditorInfo(currentInputEditorInfo)
         keyboardView!!.mOnKeyboardActionListener = this
         return keyboardHolder!!
     }

app/src/main/kotlin/com/simplemobiletools/keyboard/views/MyKeyboardView.kt

@@ -22,10 +22,13 @@ import android.view.*
 import android.view.accessibility.AccessibilityEvent
 import android.view.accessibility.AccessibilityManager
 import android.view.animation.AccelerateInterpolator
+import android.view.inputmethod.EditorInfo
 import android.widget.PopupWindow
 import android.widget.TextView
 import androidx.core.animation.doOnEnd
 import androidx.core.animation.doOnStart
+import androidx.emoji2.text.EmojiCompat
+import androidx.emoji2.text.EmojiCompat.EMOJI_SUPPORTED
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 import com.simplemobiletools.commons.helpers.isPiePlus
@@ -153,6 +156,7 @@ class MyKeyboardView @JvmOverloads constructor(context: Context, attrs: Attribut
     private var mToolbarHolder: View? = null
     private var mClipboardManagerHolder: View? = null
     private var mEmojiPaletteHolder: View? = null
+    private var emojiCompatMetadataVersion = 0
 
     // For multi-tap
     private var mLastTapTime = 0L
@@ -423,6 +427,10 @@ class MyKeyboardView @JvmOverloads constructor(context: Context, attrs: Attribut
         }
     }
 
+    fun setEditorInfo(editorInfo: EditorInfo) {
+        emojiCompatMetadataVersion = editorInfo.extras?.getInt(EmojiCompat.EDITOR_INFO_METAVERSION_KEY, 0) ?: 0
+    }
+
     fun vibrateIfNeeded() {
         if (context.config.vibrateOnKeypress) {
             performHapticFeedback()
@@ -1443,7 +1451,7 @@ class MyKeyboardView @JvmOverloads constructor(context: Context, attrs: Attribut
                 typeface = Typeface.DEFAULT
             }
             val emojis = fullEmojiList.filter { emoji ->
-                systemFontPaint.hasGlyph(emoji)
+                systemFontPaint.hasGlyph(emoji) || EmojiCompat.get().getEmojiMatch(emoji, emojiCompatMetadataVersion) == EMOJI_SUPPORTED
             }
             Handler(Looper.getMainLooper()).post {
                 setupEmojiAdapter(emojis)

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<com.simplemobiletools.commons.views.MyTextView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.appcompat.widget.AppCompatTextView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/emoji_value"
     android:layout_width="@dimen/emoji_item_size"