如何使用设备中的默认播放器在 Android 中播放 3gp 音频文件？

Question

我需要播放存储在我的 sd 卡位置的 3gp 音频文件，以便在我的 HTC 设备中使用我的默认媒体播放器播放它。

代码：

 public class AudioRecorder extends Activity {

     private static final String CAMERA_STATUS = "camera_upload";
        private static final String GALLERY_STATUS = "gallery_upload";
        MediaRecorder recorder = new MediaRecorder();
        static String path = "audio-android.3gp";
        Button startRecording;
        Button stopRecording;
        Button save;
        Button palyAudio;
        private Context context;


     private String sanitizePath(String path) {
        if (!path.startsWith("/")) {
            path = "/" + path;
        }
        if (!path.contains(".")) {
            path += ".3gp";
        }
        return Environment.getExternalStorageDirectory().getAbsolutePath()
            + path;
        }



     @Override
        protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        setContentView(R.layout.audio_recording);
        context = this;
        /**
         * Creates a new audio recording at the given path (relative to root of
         * SD card).
         */

        this.path = sanitizePath(path);

        startRecording = (Button) findViewById(R.id.startRecording);
        stopRecording = (Button) findViewById(R.id.stopRecording);
        save = (Button) findViewById(R.id.resetRecording);
        palyAudio = (Button) findViewById(R.id.playRecorded);

startRecording.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
            try {
                stopRecording.setVisibility(View.VISIBLE);
                startRecording.setVisibility(View.GONE);
                start();

            } catch (IOException e) {
                e.printStackTrace();
            }

            }
        });

        stopRecording.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
            stopRecording.setVisibility(View.GONE);
            startRecording.setVisibility(View.VISIBLE);
            try {
                            stop();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            }
        });


        palyAudio.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
             playAudio();
             //startMediaPlayer();

            }

        });

        }

        /**
         * 
         * play the recorded audio
         * 
         */
        public void playAudio() {
        try {

            Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
            Uri data = Uri.parse(path);
           // Intent intent = new Intent(Intent.ACTION_VIEW, data);  
            intent.setDataAndType(data, "audio/mp3");
            startActivity(intent);
        } catch (ActivityNotFoundException e) {
            e.printStackTrace();
        } catch (Exception e) {
            // TODO: handle exception
        }
        }


      /**
         * Starts a new recording.
         */
        public void start() throws IOException {
        recorder = new MediaRecorder();

        String state = android.os.Environment.getExternalStorageState();

        if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
            throw new IOException("SD Card is not mounted.  It is " + state
                + ".");
        }

        // make sure the directory we plan to store the recording in exists
        File directory = new File(path).getParentFile();
        System.out.println("start() directory >  " + directory);
        if (!directory.exists() && !directory.mkdirs()) {
            throw new IOException("Path to file could not be created.");
        }

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

        }

        /**
         * Stops a recording that has been previously started.
         */
        public void stop() throws IOException {
        recorder.stop(); // Stops recording.
        recorder.release(); // Now the object cannot be reused

        }


    }

Answer 1

public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(t);
        path = "/sdcard/sample.mp3";
                    mMediaPlayer = new MediaPlayer();
                    mMediaPlayer.setDataSource(path);
                    mMediaPlayer.prepare();
                    mMediaPlayer.start();
    }

Answer 2

所以这实际上是一个相当大的问题，但这里是如何做到的：

Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getAbsolutePath() + yourfilepath);
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.setDataAndType(uri,"video/3gpp");
startActivity(it);

关键是要设置视频 MIME，即使是音频文件。不要问我为什么会这样，它就是这样。

Answer 3

Uri playUri = Uri.parse("file:///sdcard/music/an.mp3");
Intent intent = new Intent(Intent.ACTION_VIEW, playUri); 
startActivity(intent);

Answer 4

使用 VideoView（参见 example）来克服表面和状态的使用，它使用本机播放器。

String path = getExternalStorageDirectory() + "/path/to/file/in/sdcard";
VideoView vv = (VideoView)findViewById(R.id.myVideoViewId);
vv.setVideoPath(path);
vv.start();

Answer 5

protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);

        Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
        Uri data = Uri.parse("file:///sdcard/sample.mp3");
        intent.setDataAndType(data,"audio/mp3");

        try {
            startActivity(intent);
        } catch (ActivityNotFoundException e) {
            e.printStackTrace();

        }