Android Dialog点击内容外围小部分区域没有消失

这两天做一个dialog，发现点击紧贴dialog内容的外围小部分区域时，dialog无法消失，但是，我明明已经设置了：

dialog.setCancelable(true);

dialog.setCanceledOnTouchOutside(true);

两个都赋值true，问题依旧。

后来看源码，发现是因为window中的一个函数的限制原因：

private boolean isOutOfBounds(Context context, MotionEvent event) {
        final int x = (int) event.getX();
        final int y = (int) event.getY();
        final int slop = ViewConfiguration.get(context).getScaledWindowTouchSlop();
        final View decorView = getDecorView();
        return (x < -slop) || (y < -slop)
                || (x > (decorView.getWidth()+slop))
                || (y > (decorView.getHeight()+slop));
    }

需要重写onTouchEvent函数。

自定义dialog，继承自Dialog，完整代码：

public class BannerDialog extends Dialog {
    public BannerDialog(@NonNull Context context) {
        super(context);
    }

    public BannerDialog(@NonNull Context context, int themeResId) {
        super(context, themeResId);
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setCancelable(true);
        setCanceledOnTouchOutside(true);
    }


    @Override
    public boolean onTouchEvent(@NonNull MotionEvent event) {
//        return super.onTouchEvent(event);
        Window window = getWindow();
        if (null == window) {
            return false;
        }

        final View decorView = window.getDecorView();
        if (isShowing() && shouldCloseOnTtouch(event, decorView)) {

            cancel();
            return true;
        }
        return false;
    }

    private boolean shouldCloseOnTtouch(MotionEvent event, View decorView) {
        final int x = (int) event.getX();
        final int y = (int) event.getY();
        return x <= 0 || y <= 0 || x > decorView.getWidth() || y > decorView.getHeight();
    }

}