java - 我正在尝试开发一项 Activity ，用户可以在其中录制音频并将其保存在内部存储中

Question

我正在尝试开发一项 Activity ，在其中我可以录制音频，直到我触摸移动按钮上的按钮被释放为止，文件应保存在存储中。该文件已创建并保存在文件夹内，但是当我正常单击该按钮时，会发生错误。我已经尽力了，但每次都会出错。收到错误消息

java.lang.RuntimeException:停止失败。 在 android.media.MediaRecorder.stop( native 方法)

请帮助我，以便我完成我的项目。

     private void audiorecordermethod(){
   if(checkPermission()){
       capturebutton.setOnTouchListener(new View.OnTouchListener() {
           @Override
           public boolean onTouch(View v, MotionEvent event) {
               if(event.getAction() == MotionEvent.ACTION_DOWN){
                   validateMicAvailability();
                   AudioSavePathInDevice =
                           Environment.getExternalStorageDirectory().getAbsolutePath() + "/Alpha/Voice/Send/" ;
                   File audiodir = new File(AudioSavePathInDevice);
                   if (!audiodir.exists()){
                       audiodir.mkdirs();
                   }
                   String filepath = audiodir + "/"+ CreateRandomAudioFileName(5) + ".3gp";
                   MediaRecorderReady(filepath);

                   try {
                       mediaRecorder.prepare();
                       mediaRecorder.start();
                   } catch (IllegalStateException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   } catch (IOException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   }

                   return true;
               }else if(event.getAction() == MotionEvent.ACTION_UP){

                      mediaRecorder.stop();
                      mediaRecorder.release();

                   return true;
               }
               return false;
           }
       });
   }else{
       requestPermission();
   }
}

public void MediaRecorderReady(String filepath){
    mediaRecorder=new MediaRecorder();

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
        mediaRecorder.setOutputFile(filepath);
        mediaRecorder.setAudioChannels(1);
        mediaRecorder.setAudioSamplingRate(8000);
        mediaRecorder.setAudioEncodingBitRate(44100);

}

public String CreateRandomAudioFileName(int string){
    StringBuilder stringBuilder = new StringBuilder( string );
    int i = 0 ;
    while(i < string ) {
        stringBuilder.append(RandomAudioFileName.
                charAt(random.nextInt(RandomAudioFileName.length())));

        i++ ;
    }
    return stringBuilder.toString();
}

private void requestPermission() {
    ActivityCompat.requestPermissions(personalChat.this, new
            String[]{WRITE_EXTERNAL_STORAGE, RECORD_AUDIO}, RequestPermissionCode);
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case RequestPermissionCode:
            if (grantResults.length> 0) {
                boolean StoragePermission = grantResults[0] ==
                        PackageManager.PERMISSION_GRANTED;
                boolean RecordPermission = grantResults[1] ==
                        PackageManager.PERMISSION_GRANTED;

                if (StoragePermission && RecordPermission) {
                    Toast.makeText(personalChat.this, "Permission Granted",
                            Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(personalChat.this,"Permission Denied",Toast.LENGTH_LONG).show();
                }
            }
            break;
    }
}

public boolean checkPermission() {
    int result = ContextCompat.checkSelfPermission(getApplicationContext(),
            WRITE_EXTERNAL_STORAGE);
    int result1 = ContextCompat.checkSelfPermission(getApplicationContext(),
            RECORD_AUDIO);
    return result == PackageManager.PERMISSION_GRANTED &&
            result1 == PackageManager.PERMISSION_GRANTED;
}

日志猫

 10-24 15:50:51.762 9687-9687/com.nanb.alpha E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.nanb.alpha, PID: 9687
java.lang.RuntimeException: stop failed.
    at android.media.MediaRecorder.stop(Native Method)
    at com.nanb.alpha.personalChat$7.onTouch(personalChat.java:312)
    at android.view.View.dispatchTouchEvent(View.java:8476)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2408)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2107)
    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2402)
    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1752)
    at android.app.Activity.dispatchTouchEvent(Activity.java:2785)
    at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
    at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2363)
    at android.view.View.dispatchPointerEvent(View.java:8677)
    at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4144)
    at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4010)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3565)
    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3618)
    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3584)
    at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3701)
    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3592)
    at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3758)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3565)
    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3618)
    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3584)
    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3592)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3565)
    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5828)
    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5802)
    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5773)
    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5918)
    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
    at android.os.MessageQueue.nativePollOnce(Native Method)
    at android.os.MessageQueue.next(MessageQueue.java:143)
    at android.os.Looper.loop(Looper.java:122)
    at android.app.ActivityThread.main(ActivityThread.java:5268)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697)

Answer 1

发生这种情况是因为您尝试在 MediaRecorder 准备好之前停止它，快速解决方案可能是这样的:

try{
    mediaRecorder.stop();
    mediaRecorder.release();
}catch (Exception e){
}

检查Documentation :

Note that a RuntimeException is intentionally thrown to the application, if no valid audio/video data has been received when stop() is called. This happens if stop() is called immediately after start(). The failure lets the application take action accordingly to clean up the output file (delete the output file, for instance), since the output file is not properly constructed when this happens.