0

画像ボタンを長押ししている間だけ音声を録音するアプリを作っています。私は次のコードでこれを達成しました：

public class MainActivity extends Activity {

MediaRecorder recorder;
MediaPlayer mediaPlayer;

//STORAGE PATHS
String storagePath;
String externalStoragePath;

//FULL OUTPUT PATHS
String externalOutputPath;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //AUDIO RECORDER
    recorder = new MediaRecorder();
    recorder.reset();       
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
    {
        externalStoragePath = Environment.getExternalStorageDirectory().getAbsolutePath();
        externalOutputPath = externalStoragePath + File.separator + "/Android/data/com.whizzappseasyvoicenotepad/test.mp3";
        recorder.setOutputFile(externalOutputPath);
    }
    else
    {
        storagePath = Environment.getDataDirectory().getAbsolutePath();
        recorder.setOutputFile(storagePath + "/Android/data/com.whizzappseasyvoicenotepad/test.mp3");
    }

    //IMAGE BUTTON ONTOUCHLISTENER
    final ImageButton recBtn = (ImageButton) findViewById(R.id.recButton);
    recBtn.setOnTouchListener(new OnTouchListener(){

        @Override
        public boolean onTouch(View v, MotionEvent event) {

            if (event.getAction() == MotionEvent.ACTION_DOWN)
            {
                recBtn.setImageResource(R.drawable.record_btn_pressed);
                try {
                    recorder.prepare();
                    recorder.start();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            else if (event.getAction() == MotionEvent.ACTION_UP)
            {
                recBtn.setImageResource(R.drawable.record_btn);
                try {
                    recorder.prepare();
                    recorder.stop();
                    recorder.reset();
                    recorder.release();
                    recorder = null;
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                Log.i(STORAGE_SERVICE, "File saved to: " + externalStoragePath + "/Android/data/com.whizzappseasyvoicenotepad/test.3gp");
            }
            return true;
        }

    });
} //END OF ONCREATE

Now after I've stopped recording, I searched for the mp3 file in file manager (android app) and tried playing it music player but it doesn't work. It says that the file can't be played.

I then also tried to add a "test play" button to the app, to try and play the recorded file with MediaPlayer but it doesn't work either. As soon as I press the play button, the app crashes.

public void testPlay (View v) throws IllegalArgumentException, SecurityException, IllegalStateException, IOException{
    mediaPlayer = new MediaPlayer();
    mediaPlayer.setDataSource(externalOutputPath);
    mediaPlayer.start();
}

Yes, I did add android:onClick="testPlay" to the xml file

Logcat file:

07-31 16:51:43.938: E/MediaPlayer(26918): Unable to to create media player
07-31 16:51:43.953: E/AndroidRuntime(26918): FATAL EXCEPTION: main
07-31 16:51:43.953: E/AndroidRuntime(26918): java.lang.IllegalStateException: Could not execute method of the activity
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.view.View$1.onClick(View.java:3633)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.view.View.performClick(View.java:4240)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.view.View$PerformClick.run(View.java:17721)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.os.Handler.handleCallback(Handler.java:730)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.os.Looper.loop(Looper.java:137)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.app.ActivityThread.main(ActivityThread.java:5103)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at java.lang.reflect.Method.invokeNative(Native Method)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at java.lang.reflect.Method.invoke(Method.java:525)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at dalvik.system.NativeStart.main(Native Method)
07-31 16:51:43.953: E/AndroidRuntime(26918): Caused by: java.lang.reflect.InvocationTargetException
07-31 16:51:43.953: E/AndroidRuntime(26918):    at java.lang.reflect.Method.invokeNative(Native Method)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at java.lang.reflect.Method.invoke(Method.java:525)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.view.View$1.onClick(View.java:3628)
07-31 16:51:43.953: E/AndroidRuntime(26918):    ... 11 more
07-31 16:51:43.953: E/AndroidRuntime(26918): Caused by: java.io.IOException: setDataSourceFD failed.: status=0x80000000
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.media.MediaPlayer.setDataSource(Native Method)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.media.MediaPlayer.setDataSource(MediaPlayer.java:981)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.media.MediaPlayer.setDataSource(MediaPlayer.java:960)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at android.media.MediaPlayer.setDataSource(MediaPlayer.java:918)
07-31 16:51:43.953: E/AndroidRuntime(26918):    at com.whizzappseasyvoicenotepad.MainActivity.testPlay(MainActivity.java:99)
07-31 16:51:43.953: E/AndroidRuntime(26918):    ... 14 more

Permissions:

<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
4

4 に答える 4

0

これは、AMR-NB を記録するためのコードのサンプルです ( onClick メソッド )

注: bitRate、sampleRate、FilePath、fileTyp=3gp

記録したものと同じになるようにプレーヤーを準備すると、IOエラーは解消されるはずです...

        if (isRecording) return;
        tmpFilNme = "me" +Calendar.getInstance().getTime().toString().hashCode();
        view.setKeepScreenOn(true);
        File dir = Environment.getExternalStorageDirectory();          
        File appDir = new File(dir, "PictureComment");
        if (!appDir.exists()) appDir.mkdir();
        recordFilePath = new File(appDir, tmpFilNme +".3gp").getAbsolutePath();
        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 

        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mRecorder.setAudioEncodingBitRate(12200);
        mRecorder.setAudioSamplingRate(8000); // this is the MIME rate

        mRecorder.setOutputFile(recordFilePath);
        try {
            mRecorder.prepare();
            mRecorder.start();
            isRecording = true;
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
于 2013-07-31T18:02:33.290 に答える
0 
java.lang.IllegalStateException

多くの場合、manifest.xml でパーミッションが欠落していることを示しています

于 2013-07-31T14:58:22.810 に答える