diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/.gitignore b/add_to_app/multiple_flutters/multiple_flutters_android/.gitignore
new file mode 100644
index 000000000..aa724b770
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/.gitignore
@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/README.md b/add_to_app/multiple_flutters/multiple_flutters_android/README.md
new file mode 100644
index 000000000..b6b394e88
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/README.md
@@ -0,0 +1,17 @@
+# multiple_flutters_android
+
+This is an add-to-app sample that uses the Flutter engine group API to host
+multiple instances of Flutter in the app.
+
+## Getting Started
+
+```sh
+cd ../multiple_flutters_module
+flutter pub get
+cd -
+open -a "Android Studio" multiple_flutters_android/ # macOS command
+# (build and run)
+```
+
+For more information see
+[multiple_flutters_module](../multiple_flutters_module/README.md).
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/.gitignore b/add_to_app/multiple_flutters/multiple_flutters_android/app/.gitignore
new file mode 100644
index 000000000..42afabfd2
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/build.gradle b/add_to_app/multiple_flutters/multiple_flutters_android/app/build.gradle
new file mode 100644
index 000000000..9972035ce
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/build.gradle
@@ -0,0 +1,50 @@
+plugins {
+ id 'com.android.application'
+ id 'kotlin-android'
+}
+
+android {
+ signingConfigs {
+ self {
+ }
+ }
+ compileSdkVersion 30
+
+ defaultConfig {
+ applicationId "dev.flutter.multipleflutters"
+ minSdkVersion 24
+ targetSdkVersion 30
+ versionCode 1
+ versionName "1.0"
+
+ testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+ }
+
+ buildTypes {
+ release {
+ minifyEnabled false
+ proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+ signingConfig debug.signingConfig
+ }
+ }
+ compileOptions {
+ sourceCompatibility JavaVersion.VERSION_1_8
+ targetCompatibility JavaVersion.VERSION_1_8
+ }
+ kotlinOptions {
+ jvmTarget = '1.8'
+ }
+}
+
+dependencies {
+
+ implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+ implementation 'androidx.core:core-ktx:1.2.0'
+ implementation 'androidx.appcompat:appcompat:1.1.0'
+ implementation 'com.google.android.material:material:1.1.0'
+ implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+ testImplementation 'junit:junit:4.+'
+ androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+ androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+ implementation project(':flutter')
+}
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/proguard-rules.pro b/add_to_app/multiple_flutters/multiple_flutters_android/app/proguard-rules.pro
new file mode 100644
index 000000000..481bb4348
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/AndroidManifest.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/AndroidManifest.xml
new file mode 100644
index 000000000..734b96c27
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,34 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/App.kt b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/App.kt
new file mode 100644
index 000000000..47cd85705
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/App.kt
@@ -0,0 +1,18 @@
+package dev.flutter.multipleflutters
+
+import android.app.Application
+import io.flutter.embedding.engine.FlutterEngineGroup
+
+/**
+ * Application class for this app.
+ *
+ * This holds onto our engine group.
+ */
+class App : Application() {
+ lateinit var engines: FlutterEngineGroup
+
+ override fun onCreate() {
+ super.onCreate()
+ engines = FlutterEngineGroup(this)
+ }
+}
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/DataModel.kt b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/DataModel.kt
new file mode 100644
index 000000000..d40587014
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/DataModel.kt
@@ -0,0 +1,41 @@
+package dev.flutter.multipleflutters
+
+import java.lang.ref.WeakReference
+
+/**
+ * Interface for getting notifications when the DataModel is updated.
+ */
+interface DataModelObserver {
+ fun onCountUpdate(newCount: Int)
+}
+
+/**
+ * A singleton/observable data model for the data shared between Flutter and the host platform.
+ *
+ * This is the definitive source of truth for all data.
+ */
+class DataModel {
+ companion object {
+ val instance = DataModel()
+ }
+
+ private val observers = mutableListOf>()
+
+ public var counter = 0
+ set(value) {
+ field = value
+ for (observer in observers) {
+ observer.get()?.onCountUpdate(value)
+ }
+ }
+
+ fun addObserver(observer: DataModelObserver) {
+ observers.add(WeakReference(observer))
+ }
+
+ fun removeObserver(observer: DataModelObserver) {
+ observers.removeIf {
+ if (it.get() != null) it.get() == observer else true
+ }
+ }
+}
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/DoubleFlutterActivity.kt b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/DoubleFlutterActivity.kt
new file mode 100644
index 000000000..f86e09ac0
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/DoubleFlutterActivity.kt
@@ -0,0 +1,81 @@
+package dev.flutter.multipleflutters
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.FrameLayout
+import android.widget.LinearLayout
+import androidx.fragment.app.FragmentActivity
+import androidx.fragment.app.FragmentManager
+import io.flutter.embedding.android.FlutterFragment
+import io.flutter.embedding.engine.FlutterEngineCache
+
+/**
+ * An activity that displays 2 FlutterFragments vertically.
+ */
+class DoubleFlutterActivity : FragmentActivity(), EngineBindingsDelegate {
+ private val topBindings: EngineBindings by lazy {
+ EngineBindings(activity = this, delegate = this, entrypoint = "topMain")
+ }
+ private val bottomBindings: EngineBindings by lazy {
+ EngineBindings(activity = this, delegate = this, entrypoint = "bottomMain")
+ }
+ private val numberOfFlutters = 2
+
+ override fun onCreate(savedInstanceState: Bundle?) {
+ super.onCreate(savedInstanceState)
+ val root = LinearLayout(this)
+ root.layoutParams = LinearLayout.LayoutParams(
+ LinearLayout.LayoutParams.MATCH_PARENT,
+ LinearLayout.LayoutParams.MATCH_PARENT
+ )
+ root.orientation = LinearLayout.VERTICAL
+ root.weightSum = numberOfFlutters.toFloat()
+
+ val fragmentManager: FragmentManager = supportFragmentManager
+
+ setContentView(root)
+
+ val app = applicationContext as App
+
+ for (i in 0 until numberOfFlutters) {
+ val flutterContainer = FrameLayout(this)
+ root.addView(flutterContainer)
+ flutterContainer.id = 12345 + i
+ flutterContainer.layoutParams = LinearLayout.LayoutParams(
+ FrameLayout.LayoutParams.MATCH_PARENT,
+ FrameLayout.LayoutParams.MATCH_PARENT,
+ 1.0f
+ )
+ val engine = if (i == 0) topBindings.engine else bottomBindings.engine
+ FlutterEngineCache.getInstance().put(i.toString(), engine)
+ val flutterFragment =
+ FlutterFragment.withCachedEngine(i.toString()).build()
+ fragmentManager
+ .beginTransaction()
+ .add(
+ 12345 + i,
+ flutterFragment
+ )
+ .commit()
+ }
+
+ topBindings.attach()
+ bottomBindings.attach()
+ }
+
+ override fun onDestroy() {
+ for (i in 0 until numberOfFlutters) {
+ FlutterEngineCache.getInstance().remove(i.toString())
+ }
+
+ super.onDestroy()
+
+ bottomBindings.detach()
+ topBindings.detach()
+ }
+
+ override fun onNext() {
+ val flutterIntent = Intent(this, MainActivity::class.java)
+ startActivity(flutterIntent)
+ }
+}
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/EngineBindings.kt b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/EngineBindings.kt
new file mode 100644
index 000000000..6c0ac0d17
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/EngineBindings.kt
@@ -0,0 +1,86 @@
+package dev.flutter.multipleflutters
+
+import android.app.Activity
+import io.flutter.FlutterInjector
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.embedding.engine.dart.DartExecutor
+import io.flutter.plugin.common.MethodChannel
+
+/**
+ * This interface represents the notifications an EngineBindings may be receiving from the Flutter
+ * instance.
+ *
+ * What methods this interface has depends on the messages that are sent over the EngineBinding's
+ * channel in `main.dart`. Messages that interact with the DataModel are handled automatically
+ * by the EngineBindings.
+ *
+ * @see main.dart for what messages are getting sent from Flutter.
+ */
+interface EngineBindingsDelegate {
+ fun onNext()
+}
+
+/**
+ * This binds a FlutterEngine instance with the DataModel and a channel for communicating with that
+ * engine.
+ *
+ * Messages involving the DataModel are handled by the EngineBindings, other messages are forwarded
+ * to the EngineBindingsDelegate.
+ *
+ * @see main.dart for what messages are getting sent from Flutter.
+ */
+class EngineBindings(activity: Activity, delegate: EngineBindingsDelegate, entrypoint: String) :
+ DataModelObserver {
+ val channel: MethodChannel
+ val engine: FlutterEngine
+ val delegate: EngineBindingsDelegate
+
+ init {
+ val app = activity.applicationContext as App
+ // This has to be lazy to avoid creation before the FlutterEngineGroup.
+ val dartEntrypoint =
+ DartExecutor.DartEntrypoint(
+ FlutterInjector.instance().flutterLoader().findAppBundlePath(), entrypoint
+ )
+ engine = app.engines.createAndRunEngine(activity, dartEntrypoint)
+ this.delegate = delegate
+ channel = MethodChannel(engine.dartExecutor.binaryMessenger, "multiple-flutters")
+ }
+
+ /**
+ * This setups the messaging connections on the platform channel and the DataModel.
+ */
+ fun attach() {
+ DataModel.instance.addObserver(this)
+ channel.invokeMethod("setCount", DataModel.instance.counter)
+ channel.setMethodCallHandler { call, result ->
+ when (call.method) {
+ "incrementCount" -> {
+ DataModel.instance.counter = DataModel.instance.counter + 1
+ result.success(null)
+ }
+ "next" -> {
+ this.delegate.onNext()
+ result.success(null)
+ }
+ else -> {
+ result.notImplemented()
+ }
+ }
+ }
+ }
+
+ /**
+ * This tears down the messaging connections on the platform channel and the DataModel.
+ */
+ fun detach() {
+ // TODO: Uncomment after https://github.com/flutter/engine/pull/24644 is on stable.
+ // engine.destroy();
+ DataModel.instance.removeObserver(this)
+ channel.setMethodCallHandler(null)
+ }
+
+ override fun onCountUpdate(newCount: Int) {
+ channel.invokeMethod("setCount", newCount)
+ }
+}
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/MainActivity.kt b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/MainActivity.kt
new file mode 100644
index 000000000..8653a9cd0
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/MainActivity.kt
@@ -0,0 +1,61 @@
+package dev.flutter.multipleflutters
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.view.View
+import android.widget.TextView
+
+/**
+ * The activity that uses standard platform UI APIs.
+ *
+ * This doesn't talk directly to or render Flutter content and represents a part of your app that
+ * would potentially already be written that wants to interface with Flutter.
+ */
+class MainActivity : AppCompatActivity(), DataModelObserver {
+ private lateinit var countView: TextView
+ private val mainActivityIdentifier: Int
+
+ private companion object {
+ /** A count that makes every other MainActivity have 1 or 2 Flutter instances. */
+ var mainActivityCount = 0
+ }
+
+ init {
+ mainActivityIdentifier = mainActivityCount
+ mainActivityCount += 1
+ }
+
+ /** Implemented from AppCompactActivity. */
+ override fun onCreate(savedInstanceState: Bundle?) {
+ super.onCreate(savedInstanceState)
+ setContentView(R.layout.activity_main)
+ DataModel.instance.addObserver(this)
+ countView = findViewById(R.id.count)
+ countView.text = DataModel.instance.counter.toString()
+ }
+
+ /** Implemented from AppCompactActivity. */
+ override fun onDestroy() {
+ super.onDestroy()
+ DataModel.instance.removeObserver(this)
+ }
+
+ /** Event from `activity_main.xml`. */
+ fun onClickNext(view: View) {
+ val nextClass =
+ if (mainActivityIdentifier % 2 == 0) SingleFlutterActivity::class.java else DoubleFlutterActivity::class.java
+ val flutterIntent = Intent(this, nextClass)
+ startActivity(flutterIntent)
+ }
+
+ /** Event from `activity_main.xml`. */
+ fun onClickAdd(view: View) {
+ DataModel.instance.counter = DataModel.instance.counter + 1
+ }
+
+ /** Implemented from DataModelObserver. */
+ override fun onCountUpdate(newCount: Int) {
+ countView.text = newCount.toString()
+ }
+}
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/SingleFlutterActivity.kt b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/SingleFlutterActivity.kt
new file mode 100644
index 000000000..7316e5301
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/java/dev/flutter/multipleflutters/SingleFlutterActivity.kt
@@ -0,0 +1,37 @@
+package dev.flutter.multipleflutters
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+
+/**
+ * This is an Activity that displays one instance of Flutter.
+ *
+ * EngineBindings is used to bridge communication between the Flutter instance and the DataModel.
+ */
+class SingleFlutterActivity : FlutterActivity(), EngineBindingsDelegate {
+ private val engineBindings: EngineBindings by lazy {
+ EngineBindings(activity = this, delegate = this, entrypoint = "main")
+ }
+
+ override fun onCreate(savedInstanceState: Bundle?) {
+ super.onCreate(savedInstanceState)
+ engineBindings.attach()
+ }
+
+ override fun onDestroy() {
+ super.onDestroy()
+ engineBindings.detach()
+ }
+
+ override fun provideFlutterEngine(context: Context): FlutterEngine? {
+ return engineBindings.engine
+ }
+
+ override fun onNext() {
+ val flutterIntent = Intent(this, MainActivity::class.java)
+ startActivity(flutterIntent)
+ }
+}
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 000000000..2b068d114
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/drawable/ic_launcher_background.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 000000000..07d5da9cb
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/layout/activity_main.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 000000000..e5ef998fa
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,52 @@
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 000000000..eca70cfe5
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
new file mode 100644
index 000000000..eca70cfe5
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,5 @@
+
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 000000000..a571e6009
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
new file mode 100644
index 000000000..61da551c5
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 000000000..c41dd2853
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
new file mode 100644
index 000000000..db5080a75
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 000000000..6dba46dab
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
new file mode 100644
index 000000000..da31a871c
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 000000000..15ac68172
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
new file mode 100644
index 000000000..b216f2d31
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 000000000..f25a41974
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
new file mode 100644
index 000000000..e96783ccc
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values-night/themes.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values-night/themes.xml
new file mode 100644
index 000000000..c7a6e63c5
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values-night/themes.xml
@@ -0,0 +1,16 @@
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/colors.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/colors.xml
new file mode 100644
index 000000000..f8c6127d3
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/colors.xml
@@ -0,0 +1,10 @@
+
+
+ #FFBB86FC
+ #FF6200EE
+ #FF3700B3
+ #FF03DAC5
+ #FF018786
+ #FF000000
+ #FFFFFFFF
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/strings.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/strings.xml
new file mode 100644
index 000000000..f9a1b1508
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+
+ Multiple Flutters
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/themes.xml b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/themes.xml
new file mode 100644
index 000000000..9623b5d83
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/app/src/main/res/values/themes.xml
@@ -0,0 +1,16 @@
+
+
+
+
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/build.gradle b/add_to_app/multiple_flutters/multiple_flutters_android/build.gradle
new file mode 100644
index 000000000..ef7bd2772
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/build.gradle
@@ -0,0 +1,26 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+ ext.kotlin_version = "1.3.72"
+ repositories {
+ google()
+ jcenter()
+ }
+ dependencies {
+ classpath "com.android.tools.build:gradle:4.1.2"
+ classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
+ // NOTE: Do not place your application dependencies here; they belong
+ // in the individual module build.gradle files
+ }
+}
+
+allprojects {
+ repositories {
+ google()
+ jcenter()
+ }
+}
+
+task clean(type: Delete) {
+ delete rootProject.buildDir
+}
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/gradle.properties b/add_to_app/multiple_flutters/multiple_flutters_android/gradle.properties
new file mode 100644
index 000000000..98bed167d
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/gradle.properties
@@ -0,0 +1,21 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
\ No newline at end of file
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/gradle/wrapper/gradle-wrapper.jar b/add_to_app/multiple_flutters/multiple_flutters_android/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 000000000..f6b961fd5
Binary files /dev/null and b/add_to_app/multiple_flutters/multiple_flutters_android/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/gradle/wrapper/gradle-wrapper.properties b/add_to_app/multiple_flutters/multiple_flutters_android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 000000000..b9e13077b
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Wed Jan 27 11:54:04 PST 2021
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/gradlew b/add_to_app/multiple_flutters/multiple_flutters_android/gradlew
new file mode 100755
index 000000000..cccdd3d51
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+## Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+ ls=`ls -ld "$PRG"`
+ link=`expr "$ls" : '.*-> \(.*\)$'`
+ if expr "$link" : '/.*' > /dev/null; then
+ PRG="$link"
+ else
+ PRG=`dirname "$PRG"`"/$link"
+ fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+ echo "$*"
+}
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+ CYGWIN* )
+ cygwin=true
+ ;;
+ Darwin* )
+ darwin=true
+ ;;
+ MINGW* )
+ msys=true
+ ;;
+ NONSTOP* )
+ nonstop=true
+ ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD="java"
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+ MAX_FD_LIMIT=`ulimit -H -n`
+ if [ $? -eq 0 ] ; then
+ if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+ MAX_FD="$MAX_FD_LIMIT"
+ fi
+ ulimit -n $MAX_FD
+ if [ $? -ne 0 ] ; then
+ warn "Could not set maximum file descriptor limit: $MAX_FD"
+ fi
+ else
+ warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+ fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+ GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+ APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+ CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+ JAVACMD=`cygpath --unix "$JAVACMD"`
+
+ # We build the pattern for arguments to be converted via cygpath
+ ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+ SEP=""
+ for dir in $ROOTDIRSRAW ; do
+ ROOTDIRS="$ROOTDIRS$SEP$dir"
+ SEP="|"
+ done
+ OURCYGPATTERN="(^($ROOTDIRS))"
+ # Add a user-defined pattern to the cygpath arguments
+ if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+ OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+ fi
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ i=0
+ for arg in "$@" ; do
+ CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+ CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
+
+ if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
+ eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+ else
+ eval `echo args$i`="\"$arg\""
+ fi
+ i=$((i+1))
+ done
+ case $i in
+ (0) set -- ;;
+ (1) set -- "$args0" ;;
+ (2) set -- "$args0" "$args1" ;;
+ (3) set -- "$args0" "$args1" "$args2" ;;
+ (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+ (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+ (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+ (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+ (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+ (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+ esac
+fi
+
+# Escape application args
+save () {
+ for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+ echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+ cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/gradlew.bat b/add_to_app/multiple_flutters/multiple_flutters_android/gradlew.bat
new file mode 100644
index 000000000..e95643d6a
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/add_to_app/multiple_flutters/multiple_flutters_android/settings.gradle b/add_to_app/multiple_flutters/multiple_flutters_android/settings.gradle
new file mode 100644
index 000000000..48e5ab48f
--- /dev/null
+++ b/add_to_app/multiple_flutters/multiple_flutters_android/settings.gradle
@@ -0,0 +1,7 @@
+include ':app'
+rootProject.name = "Multiple Flutters"
+setBinding(new Binding([gradle: this])) // new
+evaluate(new File( // new
+ settingsDir.parentFile, // new
+ './multiple_flutters_module/.android/include_flutter.groovy' // new
+))
\ No newline at end of file
diff --git a/tool/android_ci_script.sh b/tool/android_ci_script.sh
index 5b809d409..c73158c29 100755
--- a/tool/android_ci_script.sh
+++ b/tool/android_ci_script.sh
@@ -18,9 +18,15 @@ pushd add_to_app/fullscreen/flutter_module
flutter packages get
popd
+echo "Fetching dependencies for 'multiple_flutters/'."
+pushd add_to_app/multiple_flutters/multiple_flutters_module
+flutter packages get
+popd
+
declare -ar ANDROID_PROJECT_NAMES=(
"add_to_app/fullscreen/android_fullscreen" \
"add_to_app/plugin/android_using_plugin" \
+ "add_to_app/multiple_flutters/multiple_flutters_android" \
"add_to_app/prebuilt_module/android_using_prebuilt_module" \
)