Android的媒体记录启动失败

Question

我使用下面的代码来记录我的应用程序的音频

private void startRecording() { 

    if (mRecorder == null) { 
     mRecorder = new MediaRecorder(); 
    } 

    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
    mRecorder.setOutputFile(path); 
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 

    try { 
     mRecorder.prepare(); 
    } catch (IOException e) { 
     Log.i(TAG, e.getMessage()); 
    } 
    mRecorder.start(); 

} 

上面的代码完美的作品在Android 5.1棒棒糖，但得到以下错误在Android 7.1.1牛轧糖

05-25 14:51:45.245 21686-21686/com.chatting.test E/AndroidRuntime: FATAL EXCEPTION: main 
                   Process: com.chatting.test, PID: 21686 
                   java.lang.RuntimeException: start failed. 
                    at android.media.MediaRecorder.start(Native Method) 
                    at com.chatting.test.Activities.Chats.PrivateChatActivity.startRecording(PrivateChatActivity.java:1363) 
                    at com.chatting.test.Activities.Chats.PrivateChatActivity.onTouch(PrivateChatActivity.java:219) 
                    at android.view.View.dispatchTouchEvent(View.java:10019) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) 
                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2264) 
                    at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:413) 
                    at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1808) 
                    at android.app.Activity.dispatchTouchEvent(Activity.java:3061) 
                    at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:71) 
                    at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:375) 
                    at android.view.View.dispatchPointerEvent(View.java:10243) 
                    at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4438) 
                    at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4306) 
                    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853) 
                    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3906) 
                    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3872) 
                    at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3999) 
                    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3880) 
                    at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4056) 
                    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853) 
                    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3906) 
                    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3872) 
                    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3880) 
                    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853) 
                    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6246) 
                    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6220) 
                    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6181) 
                    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6349) 
                    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185) 
                    at android.os.MessageQueue.nativePollOnce(Native Method) 
                    at android.os.MessageQueue.next(MessageQueue.java:323) 
                    at android.os.Looper.loop(Looper.java:136) 
                    at android.app.ActivityThread.main(ActivityThread.java:6119) 
                    at java.lang.reflect.Method.invoke(Native Method) 
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

我已经授予下方运行权限的牛轧糖7.1.1

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

我怎么能まke上面的代码工作与Android nougat 7.1.1？

Answer 1

private static String mFileName = null; 

private MediaRecorder mRecorder = null; 

    private void startRecording() { 

     mRecorder = new MediaRecorder(); 
     mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
     mRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); 
     // Record to the external cache directory for visibility 
     mFileName = Environment.getExternalStorageDirectory().getAbsolutePath(); 

     //getExternalCacheDir().getAbsolutePath(); 
//  id=""; 
     String audioId= "RecordedAudio"; 

     idAudio=audioId; 

     mFileName += "/Recorded_Audio/"+idAudio+".mp3"; 
     mRecorder.setOutputFile(mFileName); 
     mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 

     try { 
      mRecorder.prepare(); 
     } catch (IOException e) { 
      Log.e(LOG_TAG, "prepare() failed"); 
     } 

     mRecorder.start(); 

     Log.e(LOG_TAG, "Recording:Calling "); 

    } 


private void stopRecording() { 
     mRecorder.stop(); 
     mRecorder.release(); 
     mRecorder = null; 

     Log.e(LOG_TAG, "stopRecording:Calling "); 

    } 

Answer 2

试试这个希望它会工作:)

private void startRecording(){ 
    recorder = new MediaRecorder(); 
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
    recorder.setOutputFormat(output_formats[currentFormat]); 
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
    recorder.setOutputFile(getFilename()); 
    recorder.setOnErrorListener(errorListener); 
    recorder.setOnInfoListener(infoListener); 

    try { 
     recorder.prepare(); 
     recorder.start(); 
    } catch (IllegalStateException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 

private MediaRecorder.OnErrorListener errorListener = new MediaRecorder.OnErrorListener() { 
    @Override 
    public void onError(MediaRecorder mr, int what, int extra) { 
     AppLog.logString("Error: " + what + ", " + extra); 
    } 
}; 

private MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() { 
    @Override 
    public void onInfo(MediaRecorder mr, int what, int extra) { 
     AppLog.logString("Warning: " + what + ", " + extra); 
    } 
}; 

private void stopRecording(){ 
    if(null != recorder){ 
     recorder.stop(); 
     recorder.reset(); 
     recorder.release(); 

     recorder = null; 
    } 
}