import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() {
runApp(FlutterView());
}
class FlutterView extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter View',
theme: ThemeData(
primarySwatch: Colors.grey,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
static const String _channel = 'increment';
static const String _pong = 'pong';
static const String _emptyMessage = '';
static const BasicMessageChannel<String> platform =
BasicMessageChannel<String>(_channel, StringCodec());
int _counter = 0;
@override
void initState() {
super.initState();
platform.setMessageHandler(_handlePlatformIncrement);
}
Future<String> _handlePlatformIncrement(String message) async {
setState(() {
_counter++;
});
return _emptyMessage;
}
void _sendFlutterIncrement() {
platform.send(_pong);
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Expanded(
child: Center(
child: Text(
'Platform button tapped $_counter time${ _counter == 1 ? '' : 's' }.',
style: const TextStyle(fontSize: 17.0)),
),
),
Container(
padding: const EdgeInsets.only(bottom: 15.0, left: 5.0),
child: Row(
children: <Widget>[
Image.asset('assets/flutter-mark-square-64.png', scale: 1.5),
const Text('Flutter', style: TextStyle(fontSize: 30.0)),
],
),
),
],
),
floatingActionButton: FloatingActionButton(
onPressed: _sendFlutterIncrement,
child: const Icon(Icons.add),
),
);
}
}
name: flutter_view
description: A new flutter project.
environment:
# The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
sdk: ">=2.0.0-dev.68.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
characters: 1.1.0-nullsafety.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
collection: 1.15.0-nullsafety.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
meta: 1.3.0-nullsafety.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
typed_data: 1.3.0-nullsafety.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
vector_math: 2.1.0-nullsafety.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
flutter:
uses-material-design: true
assets:
- assets/flutter-mark-square-64.png
# PUBSPEC CHECKSUM: e9aa
public class MainActivity extends AppCompatActivity {
private static FlutterEngine flutterEngine;
private FlutterView flutterView;
private int counter;
private static final String CHANNEL = "increment";
private static final String EMPTY_MESSAGE = "";
private static final String PING = "ping";
private BasicMessageChannel<String> messageChannel;
private String[] getArgsFromIntent(Intent intent) {
// Before adding more entries to this list, consider that arbitrary
// Android applications can generate intents with extra data and that
// there are many security-sensitive args in the binary.
ArrayList<String> args = new ArrayList<>();
if (intent.getBooleanExtra("trace-startup", false)) {
args.add("--trace-startup");
}
if (intent.getBooleanExtra("start-paused", false)) {
args.add("--start-paused");
}
if (intent.getBooleanExtra("enable-dart-profiling", false)) {
args.add("--enable-dart-profiling");
}
if (!args.isEmpty()) {
String[] argsArray = new String[args.size()];
return args.toArray(argsArray);
}
return null;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] args = getArgsFromIntent(getIntent());
if (flutterEngine == null) {
flutterEngine = new FlutterEngine(this, args);
flutterEngine.getDartExecutor().executeDartEntrypoint(
DartEntrypoint.createDefault()
);
}
setContentView(R.layout.flutter_view_layout);
ActionBar supportActionBar = getSupportActionBar();
if (supportActionBar != null) {
supportActionBar.hide();
}
flutterView = findViewById(R.id.flutter_view);
flutterView.attachToFlutterEngine(flutterEngine);
messageChannel = new BasicMessageChannel<>(flutterEngine.getDartExecutor(), CHANNEL, StringCodec.INSTANCE);
messageChannel.
setMessageHandler(new MessageHandler<String>() {
@Override
public void onMessage(String s, Reply<String> reply) {
onFlutterIncrement();
reply.reply(EMPTY_MESSAGE);
}
});
FloatingActionButton fab = findViewById(R.id.button);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendAndroidIncrement();
}
});
}
private void sendAndroidIncrement() {
messageChannel.send(PING);
}
private void onFlutterIncrement() {
counter++;
TextView textView = findViewById(R.id.button_tap);
String value = "Flutter button tapped " + counter + (counter == 1 ? " time" : " times");
textView.setText(value);
}
@Override
protected void onResume() {
super.onResume();
flutterEngine.getLifecycleChannel().appIsResumed();
}
@Override
protected void onPause() {
super.onPause();
flutterEngine.getLifecycleChannel().appIsInactive();
}
@Override
protected void onStop() {
super.onStop();
flutterEngine.getLifecycleChannel().appIsPaused();
}
@Override
protected void onDestroy() {
flutterView.detachFromFlutterEngine();
super.onDestroy();
}
}
def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
localPropertiesFile.withReader('UTF-8') { reader ->
localProperties.load(reader)
}
}
def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}
def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
flutterVersionCode = '1'
}
def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
flutterVersionName = '1.0'
}
apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
compileSdkVersion 29
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
applicationId "io.flutter.examples.flutter_view"
minSdkVersion 16
targetSdkVersion 29
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'com.google.android.material:material:1.0.0'
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<io.flutter.embedding.android.FlutterView
android:id="@+id/flutter_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
/>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@color/grey"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:id="@+id/button_tap"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/button_tap"
android:layout_weight="1"
android:gravity="center"
android:textSize="@dimen/font_size"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/android"
android:layout_margin="@dimen/edge_margin"
android:textSize="@dimen/platform_label_font_size"
android:background="@color/grey"
/>
</LinearLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:elevation="@dimen/fab_elevation_resting"
app:pressedTranslationZ="@dimen/fab_elevation_pressed"
android:layout_margin="@dimen/edge_margin"
android:src="@drawable/ic_add_black_24dp"
android:clickable="true"
app:rippleColor="@color/grey"
app:fabSize="normal"
app:backgroundTint="@color/white"
/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</LinearLayout>
