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Videopip.kt 此代码用于画中画模式。

package com.example.tex

import android.app.PictureInPictureParams
import android.content.res.Configuration
import android.graphics.Point
import android.os.Build
import android.os.Bundle
import android.util.Rational
import androidx.appcompat.app.AppCompatActivity

@Suppress("DEPRECATION")
class Videopip : AppCompatActivity(){

override fun onCreate(savedInstanceState: Bundle?){
    print("Inner")
    super.onCreate(savedInstanceState)
    if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.O){
        val mpipParams=PictureInPictureParams.Builder()
        val display=windowManager.defaultDisplay
        val point=Point()
        display.getRealSize(point)
        mpipParams.setAspectRatio(Rational(point.x,point.y))
        enterPictureInPictureMode(mpipParams.build())
    }
}

override fun onPictureInPictureModeChanged(isInPictureInPictureMode: Boolean, newConfig: Configuration?) {
    super.onPictureInPictureModeChanged(isInPictureInPictureMode, newConfig)
    if (isInPictureInPictureMode){

    }else{

    }
}
}

MainActivity.kt 这段代码是mainActivity调用平台通道的代码。

package com.example.tex

import androidx.annotation.NonNull
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugin.common.MethodChannel

class MainActivity: FlutterActivity() {
  private val channel = "PictureinPicture"

override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
    super.configureFlutterEngine(flutterEngine)
    MethodChannel(flutterEngine.dartExecutor.binaryMessenger, 
   channel).setMethodCallHandler {
            call, result ->
        if (call.method=="pips"){
            Videopip()
            result.success("Hai")
    }
}
 }
 }

此代码调用方法调用这是调用方法的颤振代码。

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

class MyHomePage extends StatefulWidget {
 const MyHomePage({Key? key}) : super(key: key);

  @override
_MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
static const pip = const MethodChannel('PictureinPicture');

Future<void> pips() async {
  String? pipoutput;
 try {
  var result = await pip.invokeMethod('pips');
  setState(() {
    pipoutput = result;
  });
} on PlatformException catch (e) {
  print(e.toString());
}
print(pipoutput!);

}

@override
Widget build(BuildContext context) {
return Container(
  child: ElevatedButton(
    child: Text('Click Me'),
    onPressed: pips,
  ),
   );
  }
 }

按下按钮时。该应用程序想要进入点子模式。但它不起作用。甚至消息“Hai”消息也会传递给颤振，但 pip 模式不起作用。我不知道我在哪里做错了。请有人帮忙解决这个问题。

AndroidManifyt.XML

<application
    android:label="tex"
    android:icon="@mipmap/ic_launcher">
   <activity android:name=".Videopip"
   android:supportsPictureInPicture="true"
   android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"
   />
       <activity
        android:name=".MainActivity"
        android:launchMode="singleTop"
        android:theme="@style/LaunchTheme"
        android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
        android:hardwareAccelerated="true"
        android:windowSoftInputMode="adjustResize">
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