Android-从另一个Fragment C#启动Fragemnt [英] Android - Start Fragemnt from another Fragment C#

问题描述

我知道这个问题在这里问得太多了，但是我尝试过所有解决方案，从另一个片段中打开一个片段，但没人为我工作.

I know this question has been asked too much here but i ahve tried every solution out there to open a fragment from another fragment and no one worked for me.

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;
       }

当我运行应用程序并单击add按钮时，没有任何反应.这是为什么 ?我试图通过放置而不是<LinearLayout>和<FrameLayout>来更改Fragment1的布局，但也无法正常工作.请帮助我找到解决方案.

When I run the app, and click the add button nothing is happening. Why is that ? I have tried to change the layout of the Fragment1 by putting instead of <LinearLayout> a <FrameLayout> but also disn't worked. Please help me to find a solution.

我在Fragment2中放入了toast消息，当我单击fragment1中的add按钮时，显示toast消息(在fragment2中)，这表示一切正常，但其布局未显示在屏幕上.

I have put a toast message in the Fragment2 and when I click the add button in the fragment1, the toast message (which is in the fragment2) is showing which means that the fragment2 is starting fine but it's layout is not showing on the screen.

推荐答案

您需要FrameLayout包含您的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>

您的代码应为:

    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;
    }

您可以参考此看看为什么您的fragment2只在其顶部.我用ll.Visibility = ViewStates.Gone;来避免它.

You can refer to this to see why your fragment2 just top on it. I use ll.Visibility = ViewStates.Gone; to avoid it.

这篇关于Android-从另一个Fragment C#启动Fragemnt的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！