java.lang.IllegalStateException при остановке MediaRecorder

Question

Я знаю, что этот вопрос задавали много, но никто не решил мою проблему. MediaRecorder отлично работает при записи звука, но при нажатии кнопки, чтобы остановить его, он выдает java.lang.IllegalStateException. Заранее спасибо. Вот код:

File rootPath = new File(Environment.getExternalStorageDirectory(), "Recording");
    if(!rootPath.exists()) {
        rootPath.mkdirs();
    }

    buttonStart = (ImageButton) findViewById(R.id.RecordingButton);
    buttonStop = (Button) findViewById(R.id.StopRecordingButton);

    buttonStart.setEnabled(true);
    buttonStop.setEnabled(false);

    buttonStart.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

            if(checkPermission()) {
                datetimeLog = DateString();
                AudioSavePathInDevice = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Recording/" + datetimeLog + "_AudioRecording.3gp";
                try {
                    mediaRecorder=new MediaRecorder();
                    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                    mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
                    mediaRecorder.setOutputFile(AudioSavePathInDevice);
                    mediaRecorder.prepare();
                    mediaRecorder.start();
                } catch (IllegalStateException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                buttonStart.setEnabled(false);
                buttonStop.setEnabled(true);

                Toast.makeText(MainActivity.this, "Recording Started...", Toast.LENGTH_LONG).show();
            } else {
                requestPermission();
            }
        }
    });

    buttonStop.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            System.out.println(mediaRecorder);
            mediaRecorder.stop();
            //mediaRecorder.reset();
            mediaRecorder.release();
            mediaRecorder = null;
            buttonStart.setEnabled(true);
            buttonStop.setEnabled(false);
            Toast.makeText(MainActivity.this, "Recording Stopped", Toast.LENGTH_LONG).show();
            showAddItemDialog(MainActivity.this);
        }
    });
}

private String DateString() {
    Date c = Calendar.getInstance().getTime();
    SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy-h-m-s");
    String formattedDate = df.format(c);
    return formattedDate;
}

private void showAddItemDialog(final Context c) {
    final EditText taskEditText = new EditText(c);
    AlertDialog dialog = new AlertDialog.Builder(c)
            .setTitle("Save Recording as?")
            .setMessage("Name of Audio Recording (Make this a short)")
            .setView(taskEditText)
            .setPositiveButton("Save", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    logName = taskEditText.getText().toString().replaceAll("\n","");
                    //AudioSavePathInDevice
                    //datetimeLog
                    //save to file
                    String toWrite = logName + "," + AudioSavePathInDevice + "," + datetimeLog + "\n";
                    myFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Recording/Logs.txt");
                    try {
                        buff = new BufferedWriter ( new FileWriter ( myFile,true));
                        buff.append(toWrite);
                        buff.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    File file = new File(AudioSavePathInDevice);
                    boolean deletedfile = file.delete();
                }
            }).create();
    dialog.show();
}

private void requestPermission() {
    ActivityCompat.requestPermissions(MainActivity.this, new
            String[]{WRITE_EXTERNAL_STORAGE, RECORD_AUDIO, WAKE_LOCK}, 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(MainActivity.this, "Permission Granted",
                            Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(MainActivity.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);
    int result2 = ContextCompat.checkSelfPermission(getApplicationContext(), WAKE_LOCK);
    return result == PackageManager.PERMISSION_GRANTED &&
            result1 == PackageManager.PERMISSION_GRANTED && result2 == PackageManager.PERMISSION_GRANTED;
}

}

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

Вот сообщение об ошибке:

E/MediaRecorder: stop called in an invalid state: 4
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.ee.project, PID: 29167
java.lang.IllegalStateException
    at android.media.MediaRecorder.stop(Native Method)
    at com.example.project.MainActivity$2.onClick(MainActivity.java:114)
    at android.view.View.performClick(View.java:7125)
    at android.view.View.performClickInternal(View.java:7102)
    at android.view.View.access$3500(View.java:801)
    at android.view.View$PerformClick.run(View.java:27336)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7356)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

Answer 1

Я действительно не знаю, почему это решило мою проблему, но изменение каждого экземпляра Environment.getExternalStorageDirectory().getAbsolutePath() + "/Recording/Logs.txt"); на getFilesDir() + "/Recording/Logs.txt") решило мою проблему.