小编jka*_*z94的帖子

我正在构建一个需要播放录制声音的录音机.我在播放音频时遇到了很多麻烦.我知道该文件存在是因为我将其隔离到SD卡上的文件夹中,但由于某种原因它无法播放.

这是我的代码:

public class RecorderEditActivity extends SherlockActivity implements
    DatabaseHelper.MetadataListener {

private long position;

private Button playButton = null;
private TextView date = null;
private EditText title = null;
private EditText notes = null;
private Button saveButton = null;

private MediaPlayer mediaPlayer = null;
private boolean isPlaying = false;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.edit_item);

    position = getIntent().getExtras().getLong(DatabaseHelper.KEY_ROWID);

    playButton = (Button) findViewById(R.id.play);
    date = (TextView) findViewById(R.id.recording_date);
    title = (EditText) findViewById(R.id.edit_title);
    notes = (EditText) findViewById(R.id.edit_notes);
    saveButton = (Button) findViewById(R.id.save_edit_button);

    mediaPlayer …