2016-08-04 77 views
0

夥計們我迷失了我的想法,我希望我的主要活動用按鈕顯示UI,一旦我點擊了按鈕,我希望片段打開,但我只是看起來無法正確,我知道我必須創建一個ViewGroup容器,所以我可以使用Transaction.add方法,但我不知道下一步該做什麼或放哪裏。請幫助,提前致謝。通過OnClickListner實例化活動中的片段

Main.java

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.app.Fragment; 
import android.app.FragmentTransaction; 


public class MainActivity extends AppCompatActivity { 

    Button b1; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     b1=(Button)findViewById(R.id.btnFragmentA); 

     b1.setOnClickListener(new View.OnClickListener(){ 
      @Override 
      public void onClick(View v){ 
       Fragment newFragment = new Fragment(); 
       FragmentTransaction transaction = getFragmentManager().beginTransaction(); 

       transaction.add(R.id.fragment1 , newFragment); 
       transaction.commit(); 
      } 
     }); 
    } 
} 

片段

import android.app.Fragment; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


public class FragmentA extends Fragment 
{ 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    { 
     return inflater.inflate(R.layout.a_fragment, container, false); 
    } 
} 

主要XML

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.dane.fragmenttest.MainActivity"> 

    <Button 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Fragment A" 
     android:id="@+id/btnFragmentA" 
     android:layout_centerVertical="true" 
     android:layout_centerHorizontal="true" /> 

</RelativeLayout> 

片段XML

<?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:weightSum="0"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="This is the fragment" 
     android:id="@+id/textView" 
     android:layout_gravity="center_horizontal" /> 
</LinearLayout> 

回答

0

我認爲你只需要做2件事。

  1. 將容器添加到主XML以容納FragmentA。

例如:

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.dane.fragmenttest.MainActivity"> 

    <FrameLayout 
     android:id="@+id/container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_above="@+id/button" /> 

    <Button 
     android:id="@+id/btnFragmentA" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentBottom="true" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" 
     android:text="Fragment A" /> 

</RelativeLayout> 
在MainActivity

例如

  • 更新onClickListener()

    b1.setOnClickListener(new View.OnClickListener(){ 
        @Override 
        public void onClick(View v){ 
         FragmentA newFragment = new FragmentA(); 
    
         getFragmentManager().beginTransaction() 
          .add(R.id.container , newFragment) 
          .commit(); 
        } 
    }); 
    

    我希望這有助於。