Flutter使用Android原生播放器详解

接上篇：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;
   @Override
   public void onAttachedToEngine(@NonNull FlutterPluginBinding binding) {
       fpBinding = binding;
       Log.e(TAG, "onAttachedToEngine");
   }
   @Override
   public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
       Log.e(TAG, "onDetachedFromEngine");
   }
   @Override
   public void onAttachedToActivity(@NonNull ActivityPluginBinding apBinding) {
       fpBinding.getPlatformViewRegistry().registerViewFactory("plugins.my_video_player/view", new VideoViewFactory(fpBinding, apBinding));
       Log.e(TAG, "onAttachedToActivity");
   }
   @Override
   public void onDetachedFromActivityForConfigChanges() {
       Log.e(TAG, "onDetachedFromActivityForConfigChanges");
   }
   @Override
   public void onReattachedToActivityForConfigChanges(@NonNull ActivityPluginBinding binding) {
       Log.e(TAG, "onReattachedToActivityForConfigChanges");
   }
   @Override
   public 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;
   }
   @Override
   public 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);
   }
   @Override
   public 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
   @Override
   public View getView() {
       return videoView;
   }
   @Override
   public 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！

来源：https://blog.csdn.net/baiyuliang2013/article/details/129228342