根据Uri获取文件绝对路径
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); }