自定义列表视图不会取代视图

我使用自定义Adapter在listView中显示图像和文本。单击按钮时，我想用下一张图像替换图像。但是它只是在列表，而不是replacing.Below是我的代码片段：自定义列表视图不会取代视图

法在自定义视图从源码

public void BlockData() {  
    dataBase = dbHelper.getReadableDatabase(); 
    Cursor mCursor = dataBase.rawQuery("SELECT * FROM "+ dbHelper.TABLE_NAME + " WHERE " + dbHelper.KEY_HNUM+ "=" + id, null); 

     if (mCursor.moveToFirst()) { 
      do { 
       category_Id.add(mCursor.getString(mCursor.getColumnIndex(dbHelper.KEY_HNUMM)));    
      } while (mCursor.moveToNext());  
      lv.setAdapter(new BlockAdapter(getApplicationContext(),category_Id,prgmImages)); 

      stopManagingCursor(mCursor); 
      mCursor.close(); 
     } 
    }

设置抓取图像

public View getView(final int pos, View child, final ViewGroup parent) { 
    final Holder mHolder; 
    LayoutInflater layoutInflater; 
    if (child == null) { 
     layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     child = layoutInflater.inflate(R.layout.secondlist, null); 
     mHolder = new Holder(); 
     mHolder.txt_id = (TextView) child.findViewById(R.id.testingg); 
     mHolder.tx_img = (ImageView) child.findViewById(R.id.sac_img); 
     mHolder.butnxt = (Button) child.findViewById(R.id.button2); 
     mHolder.butpre = (Button) child.findViewById(R.id.button1); 
     child.setTag(mHolder); 
    } else { 
     mHolder = (Holder) child.getTag(); 
    } 

    mHolder.txt_id.setText(category_Id.get(pos)); 

    if (pos == 0) { 
     imgs = getResources().obtainTypedArray(R.array.sac_imgs); 

     mHolder.tx_img.setImageResource(imgs.getResourceId(id - 1, -1)); 
     imgs.recycle(); 
    }else{ 
     imgs = getResources().obtainTypedArray(R.array.sac_imgs); 
      mHolder.tx_img.setImageResource(imgs.getResourceId(pos - 1, -1)); 
     imgs.recycle(); 
    }  
    mHolder.butnxt.setOnClickListener(new OnClickListener() {      
     @Override 
     public void onClick(View v) { 
      id++; 
      BlockData(); 
     } 
    });        
    return child; 
} 
protected ViewGroup findViewById(int txtViewPop) { 
    return null; 
} 
public class Holder { 
    TextView txt_id; 
    Button butnxt; 
    Button butpre; 
    TextView txt_fDate; 
    ImageView tx_img;   
}

}

我应该怎么做每次按钮被点击时更换看法？我希望有人能指导我在正确的direction.thanks提前

来源

2015-03-02 nani

我应该怎么做，以取代图每次点击一个按钮？

相反ListView中添加适配器的新对象的做得一样：

创建BlockAdapter的方法来清除所有数据：

public void refeshAdapterData(List category_Id,<Data_Type> prgmImages) 
    { 
     category_Id.clear(); 
     // clear prgmImages 
     // add data to adapter 
     category_Id.addAll(category_Id); 
     // Add prgmImages 
     notifyDataSetChanged(); 
    }

2.呼叫refeshAdapterData从BlockData()方法：

refeshAdapterData(category_Id,prgmImages); 
stopManagingCursor(mCursor); 
mCursor.close();

来源

2015-03-02 08:08:18

自定义列表视图不会取代视图

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