Android取得图库图片的具体地址

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (data == null) {
        return;
    }
    switch (requestCode) {
        case REQUESTCODE_GALLERY:  
            //获得uri
            Uri galleryUri = data.getData();
            //获取图库图片地址
            String[] proj = {MediaStore.Images.Media.DATA};
            Cursor cursor = managedQuery(galleryUri, proj, null, null, null);
            int column_index = cursor.getColumnIndex(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            String path = cursor.getString(column_index);
            break;

    }
}