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Inserire un filefilter all'interno del codice

Discussione in 'Development' iniziata da francyzappala, 20 Ago 2016.

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  1. francyzappala

    francyzappala Baby Droid

    Iscritto:
    13 Ago 2016
    Messaggi:
    3
    "Mi Piace":
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    Sto cercando di fare un audio player, in cui voglio solo file con estensioni ".waw".
    Nel codice seguente mi riporta tutti i file con estensione diverse.

    Ecco il codice

    public class PlayAudioExample extends ListActivity {

    private static final int UPDATE_FREQUENCY = 500;
    private static final int STEP_VALUE = 4000;

    private MediaCursorAdapter mediaAdapter = null;
    private TextView selelctedFile = null;
    private SeekBar seekbar = null;
    private MediaPlayer player = null;
    private ImageButton playButton = null;
    private ImageButton prevButton = null;
    private ImageButton nextButton = null;

    private boolean isStarted = true;
    private String currentFile = "";
    private boolean isMoveingSeekBar = false;

    private final Handler handler = new Handler();
    private static final String SD_PATH = new String("/sdcard/");
    private final Runnable updatePositionRunnable = new Runnable() {
    public void run() {
    updatePosition();
    }
    };


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

    selelctedFile = (TextView) findViewById(R.id.selectedfile);
    seekbar = (SeekBar) findViewById(R.id.seekbar);
    playButton = (ImageButton) findViewById(R.id.play);
    prevButton = (ImageButton) findViewById(R.id.prev);
    nextButton = (ImageButton) findViewById(R.id.next);

    player = new MediaPlayer();

    player.setOnCompletionListener(onCompletion);
    player.setOnErrorListener(onError);
    seekbar.setOnSeekBarChangeListener(seekBarChanged);

    Cursor cursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null, null);

    if (null != cursor) {
    cursor.moveToFirst();

    mediaAdapter = new MediaCursorAdapter(this, R.layout.listitem, cursor);

    setListAdapter(mediaAdapter);

    playButton.setOnClickListener(onButtonClick);
    nextButton.setOnClickListener(onButtonClick);
    prevButton.setOnClickListener(onButtonClick);
    }

    }

    @Override
    protected void onListItemClick(ListView list, View view, int position, long id) {
    super.onListItemClick(list, view, position, id);

    currentFile = (String) view.getTag();

    startPlay(currentFile);
    }

    @Override
    protected void onDestroy() {
    super.onDestroy();

    handler.removeCallbacks(updatePositionRunnable);
    player.stop();
    player.reset();
    player.release();

    player = null;
    }

    private void startPlay(String file) {
    Log.i("Selected: ", file);

    selelctedFile.setText(file);
    seekbar.setProgress(0);

    player.stop();
    player.reset();

    try {
    player.setDataSource(file);
    player.prepare();
    player.start();
    } catch (IllegalArgumentException e) {
    e.printStackTrace();
    } catch (IllegalStateException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    }

    seekbar.setMax(player.getDuration());
    playButton.setImageResource(android.R.drawable.ic_media_pause);

    updatePosition();

    isStarted = true;
    }

    private void stopPlay() {
    player.stop();
    player.reset();
    playButton.setImageResource(android.R.drawable.ic_media_play);
    handler.removeCallbacks(updatePositionRunnable);
    seekbar.setProgress(0);

    isStarted = false;
    }

    private void updatePosition() {
    handler.removeCallbacks(updatePositionRunnable);

    seekbar.setProgress(player.getCurrentPosition());

    handler.postDelayed(updatePositionRunnable, UPDATE_FREQUENCY);
    }

    private class MediaCursorAdapter extends SimpleCursorAdapter {

    public MediaCursorAdapter(Context context, int layout, Cursor c) {
    super(context, layout, c,
    new String[]{MediaStore.MediaColumns.DISPLAY_NAME, MediaStore.MediaColumns.TITLE, MediaStore.Audio.AudioColumns.DURATION},
    new int[]{R.id.displayname, R.id.title, R.id.duration});
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
    TextView title = (TextView) view.findViewById(R.id.title);
    TextView name = (TextView) view.findViewById(R.id.displayname);
    TextView duration = (TextView) view.findViewById(R.id.duration);

    name.setText(cursor.getString(
    cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME)));

    title.setText(cursor.getString(
    cursor.getColumnIndex(MediaStore.MediaColumns.TITLE)));

    long durationInMs = Long.parseLong(cursor.getString(
    cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DURATION)));

    double durationInMin = ((double) durationInMs / 1000.0) / 60.0;

    durationInMin = new BigDecimal(Double.toString(durationInMin)).setScale(2, BigDecimal.ROUND_UP).doubleValue();

    duration.setText("" + durationInMin);

    view.setTag(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA)));
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
    LayoutInflater inflater = LayoutInflater.from(context);
    View v = inflater.inflate(R.layout.listitem, parent, false);

    bindView(v, context, cursor);

    return v;
    }
    }

    private View.OnClickListener onButtonClick = new View.OnClickListener() {

    @Override
    public void onClick(View v) {
    switch (v.getId()) {
    case R.id.play: {
    if (player.isPlaying()) {
    handler.removeCallbacks(updatePositionRunnable);
    player.pause();
    playButton.setImageResource(android.R.drawable.ic_media_play);
    } else {
    if (isStarted) {
    player.start();
    playButton.setImageResource(android.R.drawable.ic_media_pause);

    updatePosition();
    } else {
    startPlay(currentFile);
    }
    }

    break;
    }
    case R.id.next: {
    int seekto = player.getCurrentPosition() + STEP_VALUE;

    if (seekto > player.getDuration())
    seekto = player.getDuration();

    player.pause();
    player.seekTo(seekto);
    player.start();

    break;
    }
    case R.id.prev: {
    int seekto = player.getCurrentPosition() - STEP_VALUE;

    if (seekto < 0)
    seekto = 0;

    player.pause();
    player.seekTo(seekto);
    player.start();

    break;
    }
    }
    }
    };

    private MediaPlayer.OnCompletionListener onCompletion = new MediaPlayer.OnCompletionListener() {

    @Override
    public void onCompletion(MediaPlayer mp) {
    stopPlay();
    }
    };

    private MediaPlayer.OnErrorListener onError = new MediaPlayer.OnErrorListener() {

    @Override
    public boolean onError(MediaPlayer mp, int what, int extra) {

    return false;
    }
    };

    private SeekBar.OnSeekBarChangeListener seekBarChanged = new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
    isMoveingSeekBar = false;
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
    isMoveingSeekBar = true;
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
    if (isMoveingSeekBar) {
    player.seekTo(progress);

    Log.i("OnSeekBarChangeListener", "onProgressChanged");
    }
    }
    };
    }




    Inviato dal mio Optimus G utilizzando Tapatalk