android.media.RingtoneManager#TYPE_ALL源码实例Demo

/**
 * Returns the selected ringtone's title, or {@code null} if no ringtone is picked.
 *
 * @return The selected ringtone's title, or {@code null} if no ringtone is picked.
 */
public String getRingtoneTitle() {
  Context context = getContext();
  ContentResolver cr = context.getContentResolver();
  String[] projection = {MediaStore.MediaColumns.TITLE};

  String ringtoneTitle = null;

  if (ringtoneUri != null) {
    int type = RingtoneManager.getDefaultType(ringtoneUri);

    switch (type) {
      case RingtoneManager.TYPE_ALL:
      case RingtoneManager.TYPE_RINGTONE:
        ringtoneTitle = context.getString(R.string.RingtonePreference_ringtone_default);
        break;
      case RingtoneManager.TYPE_ALARM:
        ringtoneTitle = context.getString(R.string.RingtonePreference_alarm_sound_default);
        break;
      case RingtoneManager.TYPE_NOTIFICATION:
        ringtoneTitle = context.getString(R.string.RingtonePreference_notification_sound_default);
        break;
      default:
        try {
          Cursor cursor = cr.query(ringtoneUri, projection, null, null, null);
          if (cursor != null) {
            if (cursor.moveToFirst()) {
              ringtoneTitle = cursor.getString(0);
            }

            cursor.close();
          }
        } catch (Exception ignore) {
        }
    }
  }

  return ringtoneTitle;
}
 

private static String getDirForType(int type) {
  switch (type) {
    case RingtoneManager.TYPE_ALL:
    case RingtoneManager.TYPE_RINGTONE:
      return Environment.DIRECTORY_RINGTONES;
    case RingtoneManager.TYPE_NOTIFICATION:
      return Environment.DIRECTORY_NOTIFICATIONS;
    case RingtoneManager.TYPE_ALARM:
      return Environment.DIRECTORY_ALARMS;
    default:
      throw new IllegalArgumentException("Unsupported ringtone type: " + type);
  }
}
 

@NonNull
private Cursor createCursor(Uri ringtoneUri) {
  RingtonePreference ringtonePreference = getRingtonePreference();
  ringtoneManager = new RingtoneManager(getContext());

  ringtoneManager.setType(ringtonePreference.getRingtoneType());
  ringtoneManager.setStopPreviousRingtone(true);

  Cursor ringtoneCursor = ringtoneManager.getCursor();

  String colId = ringtoneCursor.getColumnName(RingtoneManager.ID_COLUMN_INDEX);
  String colTitle = ringtoneCursor.getColumnName(RingtoneManager.TITLE_COLUMN_INDEX);

  MatrixCursor extras = new MatrixCursor(new String[]{colId, colTitle});

  final int ringtoneType = ringtonePreference.getRingtoneType();
  final boolean showDefault = ringtonePreference.getShowDefault();
  final boolean showSilent = ringtonePreference.getShowSilent();

  if (showDefault) {
    switch (ringtoneType) {
      case RingtoneManager.TYPE_ALARM:
        extras.addRow(new String[]{CURSOR_DEFAULT_ID, getString(R.string.RingtonePreference_alarm_sound_default)});
        break;
      case RingtoneManager.TYPE_NOTIFICATION:
        extras.addRow(new String[]{CURSOR_DEFAULT_ID, getString(R.string.RingtonePreference_notification_sound_default)});
        break;
      case RingtoneManager.TYPE_RINGTONE:
      case RingtoneManager.TYPE_ALL:
      default:
        extras.addRow(new String[]{CURSOR_DEFAULT_ID, getString(R.string.RingtonePreference_ringtone_default)});
        break;
    }
  }

  if (showSilent) {
    extras.addRow(new String[]{CURSOR_NONE_ID, getString(R.string.RingtonePreference_ringtone_silent)});
  }

  selectedIndex = ringtoneManager.getRingtonePosition(ringtoneUri);
  if (selectedIndex >= 0) {
    selectedIndex += (showDefault ? 1 : 0) + (showSilent ? 1 : 0);
  }

  if (selectedIndex < 0 && showDefault) {
    if (RingtoneManager.getDefaultType(ringtoneUri) != -1) {
      selectedIndex = 0;
    }
  }

  if (selectedIndex < 0 && showSilent) {
    selectedIndex = showDefault ? 1 : 0;
  }

  Cursor[] cursors = {extras, ringtoneCursor};
  return this.cursor = new MergeCursor(cursors);
}