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Merge pull request #2869 from jason-simmons/gradle_send_receive

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An example showing how to send messages between the host app and Flutter
This commit is contained in:
Jason Simmons
2016-03-24 10:26:28 -07:00
parent f57a84b390 af008749a9
commit e1b112ff88
6 changed files with 239 additions and 43 deletions
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69
examples/hello_android/app/src/flutter/lib/main.dart
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@@ -2,6 +2,71 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/widgets.dart';
import 'dart:async';
import 'dart:convert';
import 'dart:math';
void main() => runApp(new Center(child: new Text('Hello from Flutter!')));
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/services.dart';
final Random random = new Random();
Future<String> handleGetRandom(String json) async {
Map message = JSON.decode(json);
double min = message['min'].toDouble();
double max = message['max'].toDouble();
double value = (random.nextDouble() * (max - min)) + min;
Map reply = {'value': value};
return JSON.encode(reply);
}
class HelloAndroid extends StatefulWidget {
@override
_HelloAndroidState createState() => new _HelloAndroidState();
}
class _HelloAndroidState extends State<HelloAndroid> {
double _latitude;
double _longitude;
@override
Widget build(BuildContext context) {
return new Material(
child: new Center(
child: new Column(
children: <Widget>[
new Text('Hello from Flutter!'),
new RaisedButton(
child: new Text('Get Location'),
onPressed: _getLocation
),
new Text('Latitude: ${_latitude}, Longitude: ${_longitude}'),
]
)
)
);
}
void _getLocation() {
Map message = {'provider': 'network'};
HostMessages.sendToHost('getLocation', JSON.encode(message))
.then(_onReceivedLocation);
}
void _onReceivedLocation(String json) {
Map reply = JSON.decode(json);
setState(() {
_latitude = reply['latitude'];
_longitude = reply['longitude'];
});
}
}
void main() {
runApp(new HelloAndroid());
HostMessages.addMessageHandler('getRandom', handleGetRandom);
}

7
examples/hello_android/app/src/main/AndroidManifest.xml
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@@ -6,14 +6,15 @@
<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application android:name="org.domokit.sky.shell.SkyApplication" android:label="@string/app_name" >
<activity
android:name=".FlutterActivity"
android:label="@string/app_name"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection"
android:name=".ExampleActivity"
android:launchMode="singleTask"
android:theme="@android:style/Theme.Black.NoTitleBar"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

146
examples/hello_android/app/src/main/java/com/example/flutter/ExampleActivity.java Normal file
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@@ -0,0 +1,146 @@
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package com.example.flutter;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import org.chromium.base.PathUtils;
import org.domokit.activity.ActivityImpl;
import org.domokit.sky.shell.SkyMain;
import org.domokit.sky.shell.PlatformViewAndroid;
import java.io.File;
import org.json.JSONException;
import org.json.JSONObject;
public class ExampleActivity extends Activity {
private static final String TAG = "ExampleActivity";
private PlatformViewAndroid flutterView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SkyMain.ensureInitialized(getApplicationContext(), null);
setContentView(R.layout.flutter_layout);
flutterView = (PlatformViewAndroid) findViewById(R.id.flutter_view);
File appBundle = new File(PathUtils.getDataDirectory(this), SkyMain.APP_BUNDLE);
flutterView.runFromBundle(appBundle.getPath(), null);
flutterView.addOnMessageListener("getLocation",
new PlatformViewAndroid.OnMessageListener() {
@Override
public String onMessage(String message) {
return onGetLocation(message);
}
});
Button getRandom = (Button) findViewById(R.id.get_random);
getRandom.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendGetRandom();
}
});
}
@Override
protected void onDestroy() {
if (flutterView != null) {
flutterView.destroy();
}
super.onDestroy();
}
@Override
protected void onPause() {
super.onPause();
flutterView.onPause();
}
@Override
protected void onResume() {
super.onResume();
flutterView.onResume();
}
private void sendGetRandom() {
JSONObject message = new JSONObject();
try {
message.put("min", 1);
message.put("max", 1000);
} catch (JSONException e) {
Log.e(TAG, "JSON exception", e);
return;
}
flutterView.sendToFlutter("getRandom", message.toString(),
new PlatformViewAndroid.MessageReplyCallback() {
@Override
public void onReply(String json) {
onRandomReply(json);
}
});
}
private void onRandomReply(String json) {
double value;
try {
JSONObject reply = new JSONObject(json);
value = reply.getDouble("value");
} catch (JSONException e) {
Log.e(TAG, "JSON exception", e);
return;
}
TextView randomValue = (TextView) findViewById(R.id.random_value);
randomValue.setText(Double.toString(value));
}
private String onGetLocation(String json) {
String provider;
try {
JSONObject message = new JSONObject(json);
provider = message.getString("provider");
} catch (JSONException e) {
Log.e(TAG, "JSON exception", e);
return null;
}
String locationProvider;
if (provider.equals("network")) {
locationProvider = LocationManager.NETWORK_PROVIDER;
} else if (provider.equals("gps")) {
locationProvider = LocationManager.GPS_PROVIDER;
} else {
return null;
}
LocationManager locationManager =
(LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(locationProvider);
JSONObject reply = new JSONObject();
try {
reply.put("latitude", location.getLatitude());
reply.put("longitude", location.getLongitude());
} catch (JSONException e) {
Log.e(TAG, "JSON exception", e);
return null;
}
return reply.toString();
}
}

38
examples/hello_android/app/src/main/java/com/example/flutter/FlutterActivity.java
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@@ -1,38 +0,0 @@
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package com.example.flutter;
import android.app.Activity;
import android.os.Bundle;
import org.chromium.base.PathUtils;
import org.domokit.sky.shell.SkyMain;
import org.domokit.sky.shell.PlatformViewAndroid;
import java.io.File;
public class FlutterActivity extends Activity {
private PlatformViewAndroid flutterView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SkyMain.ensureInitialized(getApplicationContext(), null);
setContentView(R.layout.flutter_layout);
flutterView = (PlatformViewAndroid) findViewById(R.id.flutter_view);
File appBundle = new File(PathUtils.getDataDirectory(this), SkyMain.APP_BUNDLE);
flutterView.runFromBundle(appBundle.getPath(), null);
}
@Override
protected void onDestroy() {
if (flutterView != null) {
flutterView.destroy();
}
super.onDestroy();
}
}

21
examples/hello_android/app/src/main/res/layout/flutter_layout.xml
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@@ -4,15 +4,36 @@
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/text_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/title"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<Button
android:id="@+id/get_random"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/get_random"
/>
<TextView
android:id="@+id/random_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
<org.domokit.sky.shell.PlatformViewAndroid
android:id="@+id/flutter_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>

1
examples/hello_android/app/src/main/res/values/strings.xml
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@@ -2,4 +2,5 @@
<resources>
<string name="app_name">Flutter App</string>
<string name="title">Flutter Application</string>
<string name="get_random">Get Random Number</string>
</resources>