Android：通过Uri获取图片文件真实路径

 public String getPAth(Uri uri) {
        String path = null;
        if (!TextUtils.isEmpty(uri.getAuthority())) {
            Cursor cursor = getContentResolver().query(uri,
                    new String[]{MediaStore.Images.Media.DATA}, null, null, null);
            if (null == cursor) {
                Toast.makeText(this, "图片没找到", Toast.LENGTH_SHORT).show();
                return null;
            }
            cursor.moveToFirst();
            path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
            cursor.close();
        } else {
            path = uri.getPath();
        }
        return path;
    }