Question

我创建了四个活动，所有这些活动都以旗帜REORDER_TO_FRONT打开。

我按此顺序打开了活动A，B，C和D
现在堆叠是A - ＆gt; B - ＆gt; C - ＆gt; d
现在我再次打开活动A，堆叠为B - ＆gt; C - ＆gt; D - ＆gt; A
当我点击回来时，应用最小化而不是去D.

请帮我解决这个问题。

请在下面找到我的四个活动的 MainACtivity：

public class MainActivity : AppCompatActivity

{

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.Main);
        var textView = this.FindViewById<TextView>(Resource.Id.textView);
        textView.Text = "A";
        textView.Click += TextView_Click;

    }

    private void TextView_Click(object sender, EventArgs e)
    {
        var intent = new Intent(this, typeof(ActivityB));
        intent.SetFlags(ActivityFlags.ReorderToFront);
        this.StartActivity(intent);
    }
}

ACtivityB：

 public class ActivityB : AppCompatActivity

{

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.Main);
        var textView = this.FindViewById<TextView>(Resource.Id.textView);
        textView.Text = "B";
        textView.Click += TextView_Click;
    }

    private void TextView_Click(object sender, EventArgs e)
    {
        var intent = new Intent(this, typeof(ActivityC));
        intent.SetFlags( ActivityFlags.ReorderToFront);
        this.StartActivity(intent);
    }
}

ActivityC ：

 public class ActivityC : AppCompatActivity

{

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

        SetContentView(Resource.Layout.Main);
        var textView = this.FindViewById<TextView>(Resource.Id.textView);
        textView.Text = "C";
        textView.Click += TextView_Click;
    }

    private void TextView_Click(object sender, EventArgs e)
    {
        var intent = new Intent(this, typeof(ActivityD));
        intent.SetFlags( ActivityFlags.ReorderToFront);
        this.StartActivity(intent);
    }     
}

ActivityD：

 public class ActivityD : AppCompatActivity

{

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.Main);
        var textView = this.FindViewById<TextView>(Resource.Id.textView);
        textView.Text = "D";
        textView.Click += TextView_Click;
    }

    private void TextView_Click(object sender, EventArgs e)
    {
        var intent = new Intent(this, typeof(MainActivity));
        intent.SetFlags( ActivityFlags.ReorderToFront);
        this.StartActivity(intent);
    }
}

Answer 1

活动有四种启动模式。它们是：

标准
singleTop
singleTask
singleInstance

更多参考资料： https://android.jlelse.eu/android-activity-launch-mode-e0df1aa72242

了解启动模式，然后就可以实现。

活动标志FLAG_ACTIVITY_REORDER_TO_FRONT无法按预期工作

1 个答案: