无法在ViewPager中设置文本

Question

我的ViewPager可以正常工作，但我现在试图在我的ViewPager中的图像顶部添加一个TexView，因此文本被“附加”到分页器。
我可以定义TexView很好，但是当我尝试的setText（），它返回一个NullPointerException在这条线：
score.setText("TEST");

这里是我的适配器代码：

private class MyPagerAdapter extends PagerAdapter { 

    public int getCount() { 
     return 5; 
    } 

    public Object instantiateItem(View collection, int position) { 

     LayoutInflater inflater = (LayoutInflater) collection.getContext() 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE);   

     int resId = 0; 
     switch (position) { 
     case 0: 
      resId = R.layout.farleft; 

      score = (TextView) findViewById(R.id.textView1); 
      **EXCEPTION HERE**  score.setText("TEST"); 

      break; 
     case 1: 
      resId = R.layout.left; 
      break; 
     case 2: 
      resId = R.layout.middle; 
      break; 
     case 3: 
      resId = R.layout.right; 
      break; 
     case 4: 
      resId = R.layout.farright; 
      break; 
     } 

     View view = inflater.inflate(resId, null); 
     view.setTag(position); 

     view.setOnClickListener(new OnClickListener() { 
      public void onClick(View view) { 

       int position = (Integer) view.getTag(); 
       Log.v("Log_tag", "Here image is clicked" + position); 

       if(position == 0){ 
        Intent intent = new Intent(LogoQuizActivity.this, 
          LevelOne.class); 
        startActivity(intent); 

       } 

       if(position == 1){ 
        Intent intent = new Intent(getBaseContext(), 
          LevelTwo.class); 
        startActivity(intent); 
       } 

       if(position == 2){ 
        Intent intent = new Intent(getBaseContext(), 
          LevelThree.class); 
        startActivity(intent); 
       } 

       if(position == 3){ 
        Intent intent = new Intent(getBaseContext(), 
          LevelFour.class); 
        startActivity(intent); 
       } 

       if(position == 4){ 
        Intent intent = new Intent(getBaseContext(), 
          LevelFive.class); 
        startActivity(intent); 
       } 
      } 
     }); 


     ((ViewPager) collection).addView(view, 0); 

     return view; 


    } 

Answer 1

使用此

View view = (View) inflater.inflate(R.layout.your_layout, null); 

，找到文本视图如

score = (TextView) view.findViewById(R.id.textView1); 
score.setText("TEST"); 

Answer 2

看起来你还没有尝试findViewById（R.id.textView1）

... 
    View view = inflater.inflate(resId, null); // this comes first 
    switch (position) { 
    case 0: 
     resId = R.layout.farleft; 

     score = (TextView) view.findViewById(R.id.textView1); 
     score.setText("TEST"); 

     break; 
    case 1: 
     resId = R.layout.left; 
     break; 
    case 2: 
     resId = R.layout.middle; 
     break; 
    case 3: 
     resId = R.layout.right; 
     break; 
    case 4: 
     resId = R.layout.farright; 
     break; 
    } 
...