Java 类android.provider.MediaStore.Audio.GenresColumns 实例源码

/**
 * @param mContext
 * @param genre_id
 * @param default_name
 * @return genre name
 */
public static String getGenreName(Context mContext, long genre_id, boolean default_name) {
    String where = BaseColumns._ID + "=" + genre_id;
    String[] cols = new String[] {
        GenresColumns.NAME
    };
    Uri uri = Audio.Genres.EXTERNAL_CONTENT_URI;
    Cursor cursor = mContext.getContentResolver().query(uri, cols, where, null, null);
    if (cursor == null){
        return MediaStore.UNKNOWN_STRING;
    }
    if (cursor.getCount() <= 0) {
        if (default_name)
            return mContext.getString(R.string.unknown);
        else
            return MediaStore.UNKNOWN_STRING;
    } else {
        cursor.moveToFirst();
        String name = cursor.getString(0);
        cursor.close();
        if (name == null || MediaStore.UNKNOWN_STRING.equals(name)) {
            if (default_name)
                return mContext.getString(R.string.unknown);
            else
                return MediaStore.UNKNOWN_STRING;
        }
        return name;
    }
}

/**
 * @param mContext
 * @param genre_id
 * @param default_name
 * @return genre name
 */
public static String getGenreName(Context mContext, long genre_id, boolean default_name) {
    String where = BaseColumns._ID + "=" + genre_id;
    String[] cols = new String[] {
        GenresColumns.NAME
    };
    Uri uri = Audio.Genres.EXTERNAL_CONTENT_URI;
    Cursor cursor = mContext.getContentResolver().query(uri, cols, where, null, null);
    if (cursor == null){
        return MediaStore.UNKNOWN_STRING;
    }
    if (cursor.getCount() <= 0) {
        if (default_name)
            return mContext.getString(R.string.unknown);
        else
            return MediaStore.UNKNOWN_STRING;
    } else {
        cursor.moveToFirst();
        String name = cursor.getString(0);
        cursor.close();
        if (name == null || MediaStore.UNKNOWN_STRING.equals(name)) {
            if (default_name)
                return mContext.getString(R.string.unknown);
            else
                return MediaStore.UNKNOWN_STRING;
        }
        return name;
    }
}

/**
 * Creates the {@link Cursor} used to run the query.
 * 
 * @param context The {@link Context} to use.
 * @return The {@link Cursor} used to run the genre query.
 */
public static final Cursor makeGenreCursor(final Context context) {
    final StringBuilder selection = new StringBuilder();
    selection.append(MediaStore.Audio.Genres.NAME + " != ''");
    return context.getContentResolver().query(MediaStore.Audio.Genres.EXTERNAL_CONTENT_URI,
            new String[] {
                    /* 0 */
                    BaseColumns._ID,
                    /* 1 */
                    GenresColumns.NAME
            }, selection.toString(), null, MediaStore.Audio.Genres.DEFAULT_SORT_ORDER);
}

/**
 * @param mContext
 * @param genre_id
 * @param default_name
 * @return genre name
 */
public static String getGenreName(Context mContext, long genre_id, boolean default_name) {
    String where = BaseColumns._ID + "=" + genre_id;
    String[] cols = new String[] {
        GenresColumns.NAME
    };
    Uri uri = Audio.Genres.EXTERNAL_CONTENT_URI;
    Cursor cursor = mContext.getContentResolver().query(uri, cols, where, null, null);
    if (cursor == null){
        return MediaStore.UNKNOWN_STRING;
    }
    if (cursor.getCount() <= 0) {
        if (default_name)
            return mContext.getString(R.string.unknown);
        else
            return MediaStore.UNKNOWN_STRING;
    } else {
        cursor.moveToFirst();
        String name = cursor.getString(0);
        cursor.close();
        if (name == null || MediaStore.UNKNOWN_STRING.equals(name)) {
            if (default_name)
                return mContext.getString(R.string.unknown);
            else
                return MediaStore.UNKNOWN_STRING;
        }
        return name;
    }
}