Android -Stuck with ListView项目

我正在开发一个Android应用程序。在那个应用程序中，我设置了一个列表视图，每个列表视图都有一个Imageview，Progressbar（InVisible）和两个按钮。Android -Stuck with ListView项目

plAdapter = new PlayAdapter(); 
     lv1.setAdapter(plAdapter); 
} 

private static class AccessoriesViewHolder { 
Button play,download; 
ProgressBar pb; 

} 

private class PlayAdapter extends BaseAdapter { 

    @Override 
    public int getCount() { 
     return contactList.toArray().length; 
    } 

    @Override 
    public String getItem(int position) { 
     return a; 
     //return al[position]; 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 


     holder = null; 

     if (convertView == null) { 
      convertView = getLayoutInflater().inflate(R.layout.design, parent, false); 

      holder = new AccessoriesViewHolder(); 
      holder.play = (Button) convertView.findViewById(R.id.btn_play); 
      holder.download = (Button) convertView.findViewById(R.id.btn_dwnld); 

      ((Button) convertView.findViewById(R.id.btn_play)).setOnClickListener(mBuyButtonClickListener); 
      ((Button) convertView.findViewById(R.id.btn_dwnld)).setOnClickListener(mBuyButtonClickListener); 
      ((ProgressBar) convertView.findViewById(R.id.progress_bar)).setVisibility(View.INVISIBLE); 

      // convertView.setTag(holder); 
     } else 

     { 

      holder = (AccessoriesViewHolder) convertView.getTag(); 
     } 


     /* 
     * The Android API provides the OnCheckedChangeListener interface 
     * and its onCheckedChanged(CompoundButton buttonView, boolean 
     * isChecked) method. Unfortunately, this implementation suffers 
     * from a big problem: you can't determine whether the checking 
     * state changed from code or because of a user action. As a result 
     * the only way we have is to prevent the CheckBox from callbacking 
     * our listener by temporary removing the listener. 
     */ 


     return convertView; 
    } 
} 

/** 
* Quickly shows a message to the user using a {@link Toast}. 
* 
* @param message The message to show 
*/ 
private void showMessage(String message) { 
    Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show(); 
} 

private OnClickListener mBuyButtonClickListener = new OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     final int position = lv1.getPositionForView(v); 

     // int dummy=position; 
      showMessage(listsong[position].toString()+""); 


      ((ProgressBar) convertView.findViewById(R.id.progress_bar)).setVisibility(View.INVISIBLE); 

    } 
}; 

protected AdapterView<ListAdapter> getListView() 
{ 
    // TODO Auto-generated method stub 
    return null; 
} 

}

如果我单击某一行中的某个按钮，进度栏必须在该行中可见。

问题是，如果我点击一个按钮，其他行上的进度条可见但不对应的行。

来源

2013-04-04 Rakesh L

Rakesh，你必须修改getView的逻辑。创建布尔数组作为数据，点击时的OnClickListener获取索引在列表项上完成，如果该布局数组中的元素编号设置为true，将显示getViewMethod进度条。 – 2013-04-04 07:20:30

在getView（）方法只需要加一个OnClickListener的按钮在你的ListView适配器和内部OnClickListener设定的进度

来源

2013-04-04 07:08:59 rakhi

尝试的知名度，改变你的getView方式类似：

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 


    holder = new AccessoriesViewHolder(); 

    convertView = getLayoutInflater().inflate(R.layout.design, parent, false); 

    holder.play = (Button) convertView.findViewById(R.id.btn_play); 
    holder.download = (Button) convertView.findViewById(R.id.btn_dwnld); 

    ((Button) convertView.findViewById(R.id.btn_play)).setOnClickListener(mBuyButtonClickListener); 
    ((Button) convertView.findViewById(R.id.btn_dwnld)).setOnClickListener(mBuyButtonClickListener); 
    ((ProgressBar) convertView.findViewById(R.id.progress_bar)).setVisibility(View.INVISIBLE); 

    return convertView; 
}

来源

2013-04-04 07:10:43

Android -Stuck with ListView项目

回答

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