常用方法(3)------根据图片的url路径获得图片物理路径

private String getImagePath(Uri uri ,String selection)
{
String path = null;
//通过Uri和selection来获取真实的图片路径
Cursor cursor = getContentResolver().query(uri,null,selection,null,null);
if (cursor != null)
{
if (cursor.moveToNext())
{
path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
}
cursor.close();
}
return path;
}