去除DialogFragment的背景阴影，背景色，标题栏

style中:

DialogFragment中:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(DialogFragment.STYLE_NO_TITLE, R.style.MyDialog);
}


@Override
public void onStart(){
    super.onStart();
    Window window = getDialog().getWindow();
    WindowManager.LayoutParams lp= window.getAttributes();
    lp.dimAmout = 0;
    lp.flags |= WindowManager.LayoutParams.FLAG_DIM_BEHIND;
    window.setAttributes(lp);
}