如何以编程方式添加和删除片段中的视图

Question

我希望有两个.xml Fragment的布局文件有条件地我想启动一个并在某些事件上更改为其他，尝试搜索Javadoc以查找相关方法，任何指针都会有帮助

Answer 1

您需要创建两个类extends Fragment类和override onCreateView()方法并扩大您的布局。例如：

类FragmentOne.java

public class FragmentOne extends Fragment { 
    @Override 
    public View onCreateView(LayoutInflater inflater, 
     ViewGroup container, Bundle savedInstanceState) { 

     //Inflate the layout for this fragment 

     return inflater.inflate(
       R.layout.fragment_one, container, false); 


     } 
    } 

类FragmentTwo.java

public class FragmentTwo extends Fragment{ 
@Override 
public View onCreateView(LayoutInflater inflater, 
    ViewGroup container, Bundle savedInstanceState) { 

    // Inflate the layout for this fragment 

    return inflater.inflate(
      R.layout.fragment_two, container, false); 


} 
} 

而在你MainActivity.java

Fragment fr; 

     if(view == findViewById(R.id.button2)) { 
      fr = new FragmentTwo(); 

     }else { 
      fr = new FragmentOne(); 
     } 

     FragmentManager fm = getFragmentManager(); 
     FragmentTransaction fragmentTransaction = fm.beginTransaction(); 
     fragmentTransaction.replace(R.id.fragment_place, fr); 
     fragmentTransaction.commit(); 

Answer 2

试试这个..

public class FragmentCont extends Fragment { 
    @Override 
    public View onCreateView(LayoutInflater inflater, 
    ViewGroup container, Bundle savedInstanceState) { 

    //Inflate the layout for this fragment 
    if(condition1){ 
    return inflater.inflate(
      R.layout.fragment_one, container, false); 
    }else{ 
    return inflater.inflate(
      R.layout.fragment_two, container, false); 
    } 


    } 
}