android listview onclick在原始文件夾中打開文本文件

Question

我有一個listView，我想在與已被點擊的列表項目相對應的行文件夾中顯示文本文件。到目前爲止我的代碼：

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      // TODO Auto-generated method stub 

      String displaytxt = ""; 
      int fileLen = 0; 
       try { 
        InputStream text = null; 

        switch(position) { 
        case 1: 
        text = getResources().openRawResource(R.raw.books1); 
        break; 
        case 2: 
        text = getResources().openRawResource(R.raw.books2); 
        break; 
        case 3: 
         text = getResources().openRawResource(R.raw.books3); 
         break; 
         default: 
          break; 
        } 
      fileLen = text.available(); 
      byte[] fileBuffer = new byte[fileLen]; 

      text.read(fileBuffer); 
      text.close(); 
      displaytxt = new String (fileBuffer); 

       } 
       catch (IOException e) { 

       } 

       tv.setText(displaytxt); 

     } 

但是當我點擊列表中的第一個項目，我得到一個錯誤在模擬器

Answer 1

嘗試改變：

switch(position) { 
    case 0: 
     text = getResources().openRawResource(R.raw.books1); 
     break; 
    case 1: 
     text = getResources().openRawResource(R.raw.books2); 
     break; 
    case 2: 
     text = getResources().openRawResource(R.raw.books3); 
     break; 
    default: 
     text = getResources().openRawResource(R.raw.books1); // paste default book 
     break; 
}