android - 如何防止 DialogFragment 在外部触摸时消失？

Question

我正在使用 DialogFragment，它将显示完全自定义的 View ，不使用 native 按钮。我使用 dialog.SetCanceledOnTouchOutside(true); 将对话框设置为可取消；当用户触摸外部时，我想运行一些代码来确定是否应该关闭对话框。我的问题是，当一个事件被触发(取消、解除)时，对话框甚至在 super.Dismiss(); 之前就已经解除了。所以我永远无法绕过解雇。

我尝试了很多东西，重写 fragment 的 OnDismiss 和 OnCancel(触发但迟到)，在 dialogBu​​ilder 和/或对话框本身上设置监听器(未触发或为时已晚)，重写 OnShow 以重置听众等...

遇到这个问题，有什么想法吗？

附言:使用 Xamarin

public override Dialog OnCreateDialog(Bundle savedInstanceState)
{
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this.Activity);
    alertDialogBuilder.SetView(myView);
    AlertDialog dialog = alertDialogBuilder.Create();
    dialog.SetCanceledOnTouchOutside(true);
    return dialog;
}

public override void OnDismiss(IDialogInterface dialog)
{
    //BreakPoint here, already dismissed
    base.OnDismiss(dialog);
}

Answer 1

你想达到这个结果吗？如果点击Dialog外部，我们可以检测到Dialog关闭前的点击事件。

您可以创建一个 MyAlertDialog 继承 AlertDialog

    public class MyAlertDialog:AlertDialog
{
    public MyAlertDialog(Context c):base(c) {

    }

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        //Please add following code for watching outside touch
        this.Window.SetFlags(WindowManagerFlags.NotTouchModal, WindowManagerFlags.NotTouchModal);
        this.Window.AddFlags(WindowManagerFlags.WatchOutsideTouch);
    }



    public override bool OnTouchEvent(MotionEvent e)
    {
        //just used for testing.
        var sss = "test";
        //If you want to close the Dialog when click the outside the Dialog part.
        //this.Dismiss();
        return true;
    }

}

接下来的部分是DialogFragment。

    public class MyDialog:Android.Support.V4.App.DialogFragment
{

    public override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

    }


    public override Dialog OnCreateDialog(Bundle savedInstanceState)
    {


        MyAlertDialog alertDialogBuilder = new MyAlertDialog(this.Activity);
        alertDialogBuilder.SetTitle("MyDialog");
        alertDialogBuilder.SetCanceledOnTouchOutside(true);
        return alertDialogBuilder;
    }



    public override void OnPause()
    {
        base.OnPause();
    }

    public override void OnCancel(IDialogInterface dialog)
    {
        base.OnCancel(dialog);
    }

    public override void OnDismiss(IDialogInterface dialog)
    {
        base.OnDismiss(dialog);
    }
}

点击按钮推送对话框。

private void BtnClick_Click(object sender, System.EventArgs e)
    {
        MyDialog dialog = new MyDialog();
        dialog.Show(SupportFragmentManager, "dialog");
    }