无法从onActivityResult访问视图（） [英] Not able to access view from onActivityResult()

问题描述

我在片段中的以下情形：

I have the following scenario in Fragment :

     onCreateView(){
       view = inflater.inflate(R.layout.mylayout, container, false);
       ScrollView sc = (scrollView)view.findViewById(R.id.sc);
       generateUI() 
       return view; }

       public void generateUI() {  
       horizontalllayout = new LinearLayout(getActivity());  
       horizontalllayout.setOrientation(android.widget.LinearLayout.HORIZONTAL); 
       Button newbtn = new Button(getActivity());
       newbtn.setId(1);
       horizontalllayout.addView(newbtn);
       newbtn.setOnClickListener( 
      public void onClick(View v) {  
       Intent CaputureIntent = new Intent(getActivity(), s.class); 
       startActivityForResult(CaputureIntent, 664);  
       } });  


    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if(resultCode == 1666){  
    populate("hi");  
    }
    } 

      public void populate(String str) { 
        Button b = (Button)getActivity().findViewbyId(1);    //Error     
        b.setText(str); 
      }  
    }  

我不能够接受的范围内。按钮上的文字不是填充（）方法改变了，当我打电话从onActivityResult（）。如果我从每一件事情外调用相同的方法工作正常。谁能帮我在设法解决这个问题。

I am not able to receive the context. The text on the button is not changed in populate() method , when I call from onActivityResult(). If I call the same method from outside every thing is working fine. Can anyone help me in sorting out this issue.

推荐答案

假设按钮是deined布局文件中，你的code是通过定义b键入正确，B组是通过整体的code访问在你的类：

assuming Button is deined inside your layout file and your code is typed correctly, set b to be accessible through whole your code by defining b in your class:

Button b;

，然后里面onCreateView（接入B）是这样的：

and then access b inside onCreateView() like this:

b = (Button)view .findViewbyId(1); 

里面onActivityResult只是采用B但是你喜欢它：

inside onActivityResult just use b however you like it:

b.setText(str); 

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