Send data from native to flutter - flutter

Question

Im extending the native implementation of FirebaseMessagingService to wait for push notifications in native android.
I need to start my flutter app when the user clicks the push notification, so.. How can I send data to my flutter app?

Answer 1

In Flutter
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget{
#override
Widget build(BuildContext context) {
return MaterialApp(
home: ScreenPage(),
);
}
}
class ScreenPage extends StatefulWidget {
#override
_ScreenPageState createState() => _ScreenPageState();
}
class _ScreenPageState extends State<ScreenPage> {
static const platform = const MethodChannel("myChannel");
#override
void initState() {
platform.setMethodCallHandler(nativeMethodCallHandler);
super.initState();
}
Future<dynamic> nativeMethodCallHandler(MethodCall methodCall) async {
print('Native call!');
switch (methodCall.method) {
case "methodNameItz" :
return "This data from flutter.....";
break;
default:
return "Nothing";
break;
}
}
#override
Widget build(BuildContext context) {
//return ();
}
}
In Java
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import io.flutter.app.FlutterActivity;
import io.flutter.plugin.common.MethodChannel;
//import io.flutter.view.FlutterNativeView;
public class MyJavaFile extends FlutterActivity {
Button clickMeButton;
MethodChannel channel;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
channel = new MethodChannel(getFlutterView(), "myChannel");
setContentView(R.layout.home_activity);
clickMeButton = findViewById(R.id.clickMeButton);
clickMeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
channel.invokeMethod("methodNameItz", null, new MethodChannel.Result() {
#Override
public void success(Object o) {
Log.d("Results", o.toString());
}
#Override
public void error(String s, String s1, Object o) {
}
#Override
public void notImplemented() {
}
});
}
});
}
}

Answer 2

You can still basically look at the firebase messaging example (or the same for android)
Create a Platform Channel in your AppDelegate (or MainActivity on android) and the register for the same channel on the dart/flutter side (maybe main.dart and register a method like onPushClicked)
Listen for your parse messages in your native code
Send them to your dart code using the platform channel (as seen in the above linked example) channel.invokeMethod('onPushClicked', myMessageArguments)

Answer 3

flutter
Map<String,dynamic> data = <String,dynamic>{};
final res = await methodChannel.invokeMethod('getDistance');
data = Map<String,dynamic>.from(res);
final dis = data['distance'] as String;
final tim = data['time'] as String;
ios native
switch call.method {
case "getDistance":
let data =
["distance":routeFormattedDistance,"time":routeFormattedTravelTime]
result(data)
default :
result("")
}