Android targetSdkVersion设置为30，屏幕分享崩溃解决方案

在使用TRTC SDK，将targetSdkVersion设置为30，进行屏幕分享时会出现如下崩溃，这主要是因为谷歌隐私策略导致的，需要启动一个前台的service，并且android:foregroundServiceType="mediaProjection"才可以解决，具体步骤如下

崩溃堆栈：

代码语言：txt复制

  Caused by: java.lang.SecurityException: Media projections require a foreground service of type ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION
        at android.os.Parcel.createException(Parcel.java:2074)
        at android.os.Parcel.readException(Parcel.java:2042)
        at android.os.Parcel.readException(Parcel.java:1990)
        at android.media.projection.IMediaProjection$Stub$Proxy.start(IMediaProjection.java:231)
        at android.media.projection.MediaProjection.<init>(MediaProjection.java:58)
        at android.media.projection.MediaProjectionManager.getMediaProjection(MediaProjectionManager.java:104)
        at com.tencent.rtmp.video.TXScreenCapture$TXScreenCaptureAssistantActivity.onActivityResult(TXScreenCapture.java:45)
        at android.app.Activity.dispatchActivityResult(Activity.java:8249)
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4931)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:4979) 
        at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2044) 
        at android.os.Handler.dispatchMessage(Handler.java:107) 
        at android.os.Looper.loop(Looper.java:224) 
        at android.app.ActivityThread.main(ActivityThread.java:7562) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950) 
     Caused by: android.os.RemoteException: Remote stack trace:
        at com.android.server.media.projection.MediaProjectionManagerService$MediaProjection.start(MediaProjectionManagerService.java:490)
        at android.media.projection.IMediaProjection$Stub.onTransact(IMediaProjection.java:135)
        at android.os.Binder.execTransactInternal(Binder.java:1021)
        at android.os.Binder.execTransact(Binder.java:994)

解决步骤

第一步

创建一个service ，并绑定一个Notification使其作为前台service

代码语言：txt复制

public class MediaService extends Service {
   private final String NOTIFICATION_CHANNEL_ID="com.tencent.trtc.apiexample.MediaService";
   private final String NOTIFICATION_CHANNEL_NAME="com.tencent.trtc.apiexample.channel_name";
   private final String NOTIFICATION_CHANNEL_DESC="com.tencent.trtc.apiexample.channel_desc";
    public MediaService() {
    }

    @Override
    public void onCreate() {
        super.onCreate();
        startNotification();
    }

    public void startNotification() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            //Call Start foreground with notification
            Intent notificationIntent = new Intent(this, MediaService.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
            NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                    .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_foreground))
                    .setSmallIcon(R.drawable.ic_launcher_foreground)
                    .setContentTitle("Starting Service")
                    .setContentText("Starting monitoring service")
                    .setContentIntent(pendingIntent);
            Notification notification = notificationBuilder.build();
            NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);
            channel.setDescription(NOTIFICATION_CHANNEL_DESC);
            NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.createNotificationChannel(channel);
            startForeground(1, notification); //必须使用此方法显示通知，不能使用notificationManager.notify，否则还是会报上面的错误
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

###第二步

在AndroidManifest.xml中配置

1.加入以下权限

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

2.设置service的type为mediaProjection

代码语言：txt复制

<service
    android:name=".MediaService"
    android:enabled="true"
    android:foregroundServiceType="mediaProjection"
    android:exported="true"/>

最后一步

在录屏直播前启动service，这里我是在application中启动的，业务上，只需要在录屏前启动即可

代码语言：txt复制

public class TRTCApplication extends Application {
    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
        startService(new Intent(this,MediaService.class));
    }
}

其他

无需再service中做去启动录屏