Question

所以我一直在开发我的第一个应用程序，除了后退按钮外，一切都很顺利。

当你按下它时会做后面的动画，但它会落在同一个Activity上然后关闭。我想要它，所以当你按下它时会进入主Activity（第一个（开始菜单））
在我的代码中你可以知道我尝试添加noHistory = true但是它也没有用。
这是它的样子

以下是（问题2）的代码，如果给我一个问题，你可以看到

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;

namespace TestingFixes
{
    [Activity(Label = "firstQ", NoHistory =true)]
    public class firstQ : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.firstQDesign); // Change This



            Button easyBtn3 = FindViewById<Button>(Resource.Id.oopBtn); //Change This
            easyBtn3.Click += (object sender, EventArgs e) => { //Change This



                easyBtn3.Click += delegate { //Change This
                    StartActivity(typeof(easySecondQ)); //Change This
                    SetContentView(Resource.Layout.easysecondQDesign); //Change This

                    //Would I maybe connect the text here to an int?


    };


            };






        }
    }
}

这是mainACtivity（开始菜单）的代码

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace TestingFixes
{
    [Activity(Label = "TestingFixes", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);


            Button easyBtn2 = FindViewById<Button>(Resource.Id.easyBtn);
            easyBtn2.Click += (object sender, EventArgs e) => {



                easyBtn2.Click += delegate {
                    StartActivity(typeof(firstQ));
                    SetContentView(Resource.Layout.firstQDesign);

                    //Would I maybe connect the text here to an int?


                };


            };

        }
    }
}

Answer 1

您可以自定义Activity的

    @Override
    public void onBackPressed() {
    if(condition)
        super.onBackPressed(); // this close app
    else
      // your code to open MainActivity
    }

如何更改后退按钮android C＃Xamarin的导航

1 个答案: