Uri转绝对路径

 

protected String getAbsoluteImagePath(Uri uri)
   {
        // can post image

        String [] proj={MediaStore.Images.Media.DATA};
        Cursor cursor = managedQuery( uri,
                        proj, // Which columns to return

                        null, // WHERE clause; which rows to return (all rows)

                        null, // WHERE clause selection arguments (none)

                        null); // Order-by clause (ascending by name)


       int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();

        return cursor.getString(column_index);
    }