Android M - MediaRecorder start failed

问题:

Samsung galaxy S6 edge 6.0.1 works fine, so maybe Android M is not the factor here.

First off, the Android 6.0+ permissions are given, so that's not the case .

Here it is :

    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){         //нужно проверять пермишны         if (ContextCompat.checkSelfPermission(MainActivity.this,                 Manifest.permission.CAMERA)         != PackageManager.PERMISSION_GRANTED ||          ContextCompat.checkSelfPermission(MainActivity.this,                 Manifest.permission.RECORD_AUDIO)         != PackageManager.PERMISSION_GRANTED ||         ContextCompat.checkSelfPermission(MainActivity.this,                 Manifest.permission.READ_EXTERNAL_STORAGE)         != PackageManager.PERMISSION_GRANTED ||         ContextCompat.checkSelfPermission(MainActivity.this,                 Manifest.permission.WRITE_EXTERNAL_STORAGE)         != PackageManager.PERMISSION_GRANTED ||         ContextCompat.checkSelfPermission(MainActivity.this,                 Manifest.permission.ACCESS_NETWORK_STATE)         != PackageManager.PERMISSION_GRANTED ||         ContextCompat.checkSelfPermission(MainActivity.this,                 Manifest.permission.INTERNET)         != PackageManager.PERMISSION_GRANTED) {                   ActivityCompat.requestPermissions(MainActivity.this,                    new String[]{Manifest.permission.CAMERA,Manifest.permission.RECORD_AUDIO,Manifest.permission.INTERNET,Manifest.permission.ACCESS_NETWORK_STATE,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE},                         PERMISSIONS_REQUEST);                     }     } 

I've tested my app on other devices and it works fine, but on Nexus 5 (hammerhead) I've got an error when MediaRecorder.start() is called and I don't know much what to do with that.

The stacktrace is as simple as :

java.lang.RuntimeException: start failed.     at android.media.MediaRecorder.start(Native Method)     at com.vladdrummer.headsup.ScreenVideoRecorder.record(ScreenVideoRecorder.java:94) 

So, not too much info. Here's the code, but keep in mind , it Works on other devices

private  Camera camera; ...  camera.setPreviewDisplay(holder);                   camera.startPreview();                   isPrepared = prepareVideoRecorder(); ..     private boolean prepareVideoRecorder() {         try{          camera.unlock();          mediaRecorder = new MediaRecorder();          mediaRecorder.setCamera(camera);         mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);         mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);         mediaRecorder.setProfile(CamcorderProfile             .get(CamcorderProfile.QUALITY_HIGH));         String path = A.getRawGameVideoPath();//4 debug purposes         mediaRecorder.setOutputFile(path);         mediaRecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());         }         catch (Exception e){             e.printStackTrace();             return false;         }         try {           mediaRecorder.prepare();         } catch (Exception e) {           e.printStackTrace();           release();           return false;         }         return true;       }        public void record(){           if (isPrepared){                   mediaRecorder.start(); // Here where it crashes on Android M           }       } 

Of course, it may be crashing on other devices as well, I tested it on 3 devices only

回答1:

For android M You need to add Runtime Permission like Camera,Audio Try This it may be help to you

private static final int MY_PERMISSIONS_REQUEST = 11; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (mContext.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {     requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO},             MY_PERMISSIONS_REQUEST); } else {     Log.d("TAG", "Already granted access");     initializeView(v); } }  @Override public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) { switch (requestCode) {     case MY_PERMISSIONS_REQUEST: {         if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {             Log.d("TAG", "Permission Granted");             initializeView(v);         } else {             Log.d("TAG", "Permission Failed");             Toast.makeText(getActivity().getBaseContext(), "You must allow permission record audio to your mobile device.", Toast.LENGTH_SHORT).show();             getActivity().finish();         }     }     // Add additional cases for other permissions you may have asked for }   } 

回答2:

try this:

if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){     if (ContextCompat.checkSelfPermission(this,             Manifest.permission.CAMERA)     != PackageManager.PERMISSION_GRANTED ||      ContextCompat.checkSelfPermission(this,             Manifest.permission.RECORD_AUDIO)     != PackageManager.PERMISSION_GRANTED ||     ContextCompat.checkSelfPermission(this,             Manifest.permission.READ_EXTERNAL_STORAGE)     != PackageManager.PERMISSION_GRANTED ||     ContextCompat.checkSelfPermission(this,             Manifest.permission.WRITE_EXTERNAL_STORAGE)     != PackageManager.PERMISSION_GRANTED ||     ContextCompat.checkSelfPermission(this,             Manifest.permission.ACCESS_NETWORK_STATE)     != PackageManager.PERMISSION_GRANTED ||     ContextCompat.checkSelfPermission(this,             Manifest.permission.INTERNET)     != PackageManager.PERMISSION_GRANTED) {              ActivityCompat.requestPermissions(this,                new String[]{Manifest.permission.CAMERA,Manifest.permission.RECORD_AUDIO,Manifest.permission.INTERNET,Manifest.permission.ACCESS_NETWORK_STATE,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE},                     0);     } } 

文章来源: Android M - MediaRecorder start failed