Question

我知道这个问题在这里问了太多，但是我已经尝试过每个解决方案从另一个片段打开一个片段，没有人为我工作。

Fragment1.cs

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    base.OnCreate(savedInstanceState);
    View view = inflater.Inflate(Resource.Layout.my_layout, container, false);
    return view;
    add.Click += delegate
        {
            Fragment2 fragment2 = new Fragment2();
            FragmentTransaction ft = FragmentManager.BeginTransaction();
            ft.Replace(Resource.Id.content_frame, fragment2);
            ft.Commit();
         };
}

my_layout

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/content_frame">
<TextView
    android:text="Text"
    android:layout_width="match_parent"
    android:layout_height="70dp"
    android:id="@+id/total"
    android:textAlignment="center"
    android:textSize="30dp" />
<TextView
    android:text="Text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textchangevalue"
    android:textSize="33dip"
    android:textStyle="bold" />
<Button
    android:text="UPDATE"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/updatebtn" />
 <Button
    android:text="ADD"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/addbtn" />
 <ListView
    android:minWidth="25px"
    android:minHeight="25px"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/portfoliolist"
    android:clickable="true" />

Fragment2.cs

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        View view = inflater.Inflate(Resource.Layout.fragment_lay, container, false);

        TextView txt = view.FindViewById<TextView>(Resource.Id.textView1);
        Button btn = view.FindViewById<Button>(Resource.Id.button1);
        listView = view.FindViewById<ListView>(Resource.Id.listView1);
        Toast.MakeText(Activity, "Fragment2 started", ToastLength.Short).Show();
        return view;
       }

当我运行应用程序时，单击add按钮不会发生任何事情。这是为什么？我试图改变Fragment1的布局，而不是<LinearLayout>一个<FrameLayout>，但也没有用。请帮我找一个解决方案。

修改我在toast中添加了Fragment2消息，当我点击add中的fragment1按钮时，toast消息（位于fragment2中1}}）显示这意味着fragment2开始正常，但它的布局没有显示在屏幕上。

Answer 1

您必须在<{strong> .../Index?Keyword=someText&IsResYearChecked=true&IsResYearChecked=false&IsResNumChecked=false&IsResTextChecked=true&IsResTextChecked=false Click之前将您的return事件附加到按钮，我认为您希望将此事件附加到{ {1}}因此您必须先创建变量view才能附加此事件

addbtn

Answer 2

您可以改为使用这些事件：

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    base.OnCreate(savedInstanceState);
    View view = inflater.Inflate(Resource.Layout.my_layout, container, false);
    Button add = view.FindViewById<Button>(Resource.Id.addbtn);
    add.Click += (object sender, EventArgs e) =>
    {
        Fragment2 fragment2 = new Fragment2();
        FragmentTransaction ft = FragmentManager.BeginTransaction();
        ft.Replace(Resource.Id.content_frame, fragment2);
        ft.Commit();
    };

    return view;
}

Answer 3

您需要FrameLayout来包含LinearLayout：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/content_frame">
  <LinearLayout
android:id="@+id/ll"
      android:orientation="vertical"
      android:layout_width="match_parent"
      android:layout_height="match_parent">


    <TextView
        android:text="Text"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:id="@+id/total"
        android:textAlignment="center"
        android:textSize="30dp" />
    <TextView
        android:text="Text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textchangevalue"
        android:textSize="33dip"
        android:textStyle="bold" />
    <Button
        android:text="UPDATE"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/updatebtn" />
    <Button
        android:text="ADD"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/addbtn" />
    <ListView
        android:minWidth="25px"
        android:minHeight="25px"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/portfoliolist"
        android:clickable="true" />
  </LinearLayout>
</FrameLayout>

你的代码应该是：

    public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        // Use this to return your custom view for this Fragment
        var view = inflater.Inflate(Resource.Layout.my_layout, container, false);
        var ll = view.FindViewById<LinearLayout>(Resource.Id.ll);
        var bt = view.FindViewById(Resource.Id.addbtn);
        bt.Click+= delegate
        {
            Fragment2 fragment2 = new Fragment2();
            FragmentTransaction ft = FragmentManager.BeginTransaction();
            ft.Replace(Resource.Id.content_frame, fragment2);
            ft.Commit();
            ll.Visibility = ViewStates.Gone;
        };
        return view;
    }

您可以参考this了解您的fragment2为何只是最重要的原因。我使用ll.Visibility = ViewStates.Gone;来避免它。

Android - 从另一个片段C开始Fragemnt＃

3 个答案: