Flutter3引用原生播放器-Android篇

接上篇：Flutter3引用原生播放器-IOS(Swift)篇

安卓端原生播放器的接入思路与ios基本一致，所以本篇就不废话了，直接上代码：

创建插件VideoViewPlugin实现FlutterPlugin：

package io.flutter.plugins.videoplayer;import android.util.Log;import androidx.annotation.NonNull;import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityAware;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;public class VideoViewPlugin implements FlutterPlugin, ActivityAware {private final static String TAG = "VideoViewPlugin";FlutterPluginBinding fpBinding;@Overridepublic void onAttachedToEngine(@NonNull FlutterPluginBinding binding) {fpBinding = binding;Log.e(TAG, "onAttachedToEngine");}@Overridepublic void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {Log.e(TAG, "onDetachedFromEngine");}@Overridepublic void onAttachedToActivity(@NonNull ActivityPluginBinding apBinding) {fpBinding.getPlatformViewRegistry().registerViewFactory("plugins.my_video_player/view", new VideoViewFactory(fpBinding, apBinding));Log.e(TAG, "onAttachedToActivity");}@Overridepublic void onDetachedFromActivityForConfigChanges() {Log.e(TAG, "onDetachedFromActivityForConfigChanges");}@Overridepublic void onReattachedToActivityForConfigChanges(@NonNull ActivityPluginBinding binding) {Log.e(TAG, "onReattachedToActivityForConfigChanges");}@Overridepublic void onDetachedFromActivity() {Log.e(TAG, "onDetachedFromActivity");}
}

由于引用视频播放器时需要用到Activity的context，所以实现了ActivityAware接口，在onAttachedToActivity方法中注册PlatformViewFactory！

创建VideoViewFactory实现PlatformViewFactory：

package io.flutter.plugins.videoplayer;import android.content.Context;import io.flutter.Log;
import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
import io.flutter.plugin.common.StandardMessageCodec;
import io.flutter.plugin.platform.PlatformView;
import io.flutter.plugin.platform.PlatformViewFactory;public class VideoViewFactory extends PlatformViewFactory {private final static String TAG = "VideoViewFactory";private final FlutterPlugin.FlutterPluginBinding fpBinding;private final ActivityPluginBinding apBinding;public VideoViewFactory(FlutterPlugin.FlutterPluginBinding fpBinding, ActivityPluginBinding apBinding) {super(StandardMessageCodec.INSTANCE);Log.e(TAG, "VideoViewFactory");this.fpBinding = fpBinding;this.apBinding = apBinding;}@Overridepublic PlatformView create(Context context, int viewId, Object args) {Log.e(TAG, "PlatformView-create:" + args.toString());return new VideoViewPlayer(args.toString(), fpBinding, apBinding);}}

创建VideoViewPlayer，实现PlatformView和MethodChannel.MethodCallHandler：

package io.flutter.plugins.videoplayer;import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;import androidx.annotation.NonNull;
import androidx.annotation.Nullable;import com.th.kjjl_flutter.R;
import com.videoplayer.player.VideoView;import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.platform.PlatformView;public class VideoViewPlayer implements PlatformView, MethodChannel.MethodCallHandler {private final static String TAG = "VideoPlayerView";Activity context;private VideoView videoView;private MethodChannel methodChannel;VideoViewPlayer(String viewId, FlutterPlugin.FlutterPluginBinding fpBinding, ActivityPluginBinding apBinding) {this.context = apBinding.getActivity();videoView = (VideoView) LayoutInflater.from(context).inflate(R.layout.video_player, null);methodChannel = new MethodChannel(fpBinding.getBinaryMessenger(), "my_video_player_" + viewId);methodChannel.setMethodCallHandler(this);}@Overridepublic void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {Log.e(TAG, "call.method>>" + call.method);switch (call.method) {case "setUrl":String url = call.arguments.toString();videoView.initVideoController(context);videoView.setUrl(url);break;case "start":videoView.start();break;case "pause":videoView.pause();break;case "release":videoView.pause();videoView.release();break;case "stopFullScreen":videoView.stopFullScreen();break;default:result.notImplemented();}}@Nullable@Overridepublic View getView() {return videoView;}@Overridepublic void dispose() {Log.e(TAG, "dispose>>");videoView.pause();videoView.release();methodChannel.setMethodCallHandler(null);methodChannel = null;}}

其中的VideoView即引用的第三方播放器库，你可以根据自己情况，使用常见的安卓端开源播放器如GSY，饺子，DKPlayer等！

video_player.xml：

<?xml version="1.0" encoding="utf-8"?>
<com.videoplayer.player.VideoView xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/videoView"android:layout_width="match_parent"android:layout_height="match_parent" />

在MainActivity中注册插件：

class MainActivity : FlutterActivity() {override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)flutterEngine!!.plugins.add(VideoViewPlugin())}
}

注意：不要在GeneratedPluginRegistrant中去注册插件包括IOS，这个类由系统自动生成其它第三方插件注册代码！安卓端在MainActivity中注册，IOS端在AppDelegate中注册！

flutter中的引用以及通信方法，上一篇已经写了，本篇就不再重复了！需要注意的是，插件名，插件id，methodChannel等，安卓，IOS和Flutter三端一定要一致！