targetSdkVersion 29 时出现 getMediaProjection 错误 [英] Error getMediaProjection when targetSdkVersion 29

问题描述

我正在构建一个屏幕录制应用程序.但它只适用于targetSdkVersion 28，当传递google请求的targetSdkVersion 29时，错误

I am building a screen recording application. But it only works on targetSdkVersion 28, when passing targetSdkVersion 29 requested by google, the error

代码

    @SuppressLint("MissingSuperCall")
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode != REQUEST_CODE) {
            Toast.makeText(this, "Error!", Toast.LENGTH_SHORT).show();
            return;
        }
        if (resultCode != RESULT_OK) {
            Toast.makeText(this,
                    "Screen Cast Permission Denied", Toast.LENGTH_SHORT).show();
            return;
        }
        mMediaProjectionCallback = new MediaProjectionCallback();

        mMediaProjection = mProjectionManager.getMediaProjection(resultCode, data);
        mMediaProjection.registerCallback(mMediaProjectionCallback, null);
        mVirtualDisplay = createVirtualDisplay();
        mMediaRecorder.start();
    }

错误被抛出

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.megamestudio.screen_record_and_booster, PID: 21862
    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1000, result=-1, data=Intent { (has extras) }} to activity {com.megamestudio.screen_record_and_booster/com.megamestudio.screen_record_and_booster.MainActivity}: java.lang.SecurityException: Media projections require a foreground service of type ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4927)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:4968)
        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$H.handleMessage(ActivityThread.java:2043)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:224)
        at android.app.ActivityThread.main(ActivityThread.java:7548)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
     Caused by: 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.megamestudio.screen_record_and_booster.MainActivity.onActivityResult(MainActivity.java:426)

请帮帮我，谢谢

推荐答案

这是经过一段时间研究后的解决方案.首先，请遵循其他答案.

This is the solution after some time of research. First of all, follow the other answers.

1. 清单权限
2. 在前台启动服务

这是我的答案

1. 在服务onStartCommand()上，我为android Q实现了这个方法.(小于Q，没有这个代码也能工作):startForeground(id, notification, serviceType)

public int onStartCommand(Intent intent, int flags, int startId) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            Notification notification = ScreenRecorderHelper.GetMediaProjectionNotification(AppShared.gContext);
            startForeground(startId,
                    notification,
                    ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION);
        }



        handleCommand(intent);
        // We want this service to continue running until it is explicitly
        // stopped, so return sticky.
        return START_STICKY;
    }

我希望这能帮助很多像我一样的人......

I hope this helps many others like me...

这篇关于targetSdkVersion 29 时出现 getMediaProjection 错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！