Question

我是Android开发的新手。我使用Xamarin Android开发Android应用程序。在替换片段中的片段时遇到问题，在模板应用上工作，我想用FragmentB替换FragmentA。在主要活动中，content_frame将被FragmentA替换。

这是我目前的代码

Main.axml

<?xml version="1.0" encoding="utf-8"?>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="vertical">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:text="MAIN ACTIVITY" />
            <FrameLayout
                android:id="@+id/parent_fragment"
                android:layout_width="fill_parent"
                android:layout_height="200dip" />
</LinearLayout>

MainActivity.cs

[Activity(Label = "NestedFrags", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        int count = 1;

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

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

            Fragment fragA = new FragmentA();
            FragmentManager.BeginTransaction().Replace(Resource.Id.parent_fragment, fragA).Commit();
        }
    }

FragmentA.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:minWidth="25px"
    android:minHeight="25px">
    <TextView
        android:text="Parent Fragment"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView1" />
    <FrameLayout
        android:id="@+id/child_fragment"
        android:layout_width="fill_parent"
        android:layout_height="200dip" />
</LinearLayout>

FragmentA.cs

public class FragmentA : Fragment
    {
        public override void OnCreate(Bundle savedInstanceState)
        {
            Fragment fragmentB = new FragmentB();
            FragmentTransaction transaction = ChildFragmentManager.BeginTransaction();
            transaction.Add(Resource.Id.child_fragment, fragmentB).Commit();
            base.OnCreate(savedInstanceState);
        }

        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            View view = inflater.Inflate(Resource.Layout.fraga, container, false);
            return view;
        }
    }

FragmentB.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:minWidth="25px"
    android:minHeight="25px">
    <TextView
        android:text="Child Fragment of A"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textView2" />
</LinearLayout>

FragmentB.cs

 public class FragmentB : Fragment
    {
        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            View view = inflater.Inflate(Resource.Layout.fragb, container, false);
            return view;
        }
    }

到目前为止，我能够将碎片替换为另一个碎片。但我试图用fragmentB完全替换fragmentA。谁能帮帮我吗？我不介意任何人都可以用Java回答，因为我只需要一些工作，我将根据Java解决方案对我的代码进行更改。

提前感谢所有或任何帮助。

Answer 1

要用片段B替换片段A，你必须做的几乎与你在添加片段A时已经做的一样：

        Fragment fragB = new FragmentB();
        FragmentManager.BeginTransaction().Replace(Resource.Id.parent_fragment, fragB).Commit();

确保将片段放在主容器（主布局中的那个）上。

替换子片段

1 个答案: