如何获取手机和存储卡上的图片

/**

* 通过uri获取文件的绝对路径

* @param uri

* @return

*/

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);

}