Utility.java 文件源码

public static long getContentSize(final Uri contentUri) {
    Cursor cursor = null;
    try {
        cursor = FacebookSdk
                .getApplicationContext()
                .getContentResolver()
                .query(contentUri, null, null, null, null);
        int sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE);

        cursor.moveToFirst();
        return cursor.getLong(sizeIndex);
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}