Question

这可能是一个愚蠢的问题，但我有点难以让它发挥作用。

我有一个自定义列表视图适配器，其中包含一些textview和imageview。但是当我使用自定义适配器更新listview时，它只更新最后一个值。这是我的代码

适配器代码

public class InfoListAdapter extends ArrayAdapter<aSProperty> {

Context mContext;
List<aSProperty> values= null;

 public InfoListAdapter(Context mContext,  List<aSProperty> data) {

   super(mContext, R.layout.list_row, data);
   this.mContext = mContext;
   this.values = data.;
 }

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

   if (convertView == null) {
       LayoutInflater infalInflater = (LayoutInflater) this.mContext
               .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       convertView = infalInflater.inflate(R.layout.list_row, null);
       signal = (ImageView) convertView.findViewById(R.id.images);
       type = (TextView) convertView.findViewById(R.id.type);
       info = (TextView) convertView.findViewById(R.id.info);
       image.setBackgroundResource(R.drawable.abc);
           Log.d(TAG, "List Size"+values.size());
           for(int i = 0; i < values.size(); i++){
               Log.d(TAG, "DATA"+values.get(i).type);
               type.setText(values.get(i).type);
           }

   }
 ImageView image;
     TextView type;
      TextView info;
   static String TAG= "InfoListAdapter";


   return convertView;

}

填充适配器的代码

  info_panel = new InfoListAdapter(esActivity.this, allData);
            list.setAdapter(info_panel);

但我不知道为什么，它只显示值列表中的最后一个值。另外我想根据条件和数据内部值更改图像，这是做任何好方法。

Answer 1

use following code



public class InfoListAdapter extends ArrayAdapter<aSProperty> {

Context mContext;
List<aSProperty> values= null;

 public InfoListAdapter(Context mContext,  List<aSProperty> data) {

   super(mContext, R.layout.list_row, data);
   this.mContext = mContext;
   this.values = data.;
 }

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

   if (convertView == null) {
       LayoutInflater infalInflater = (LayoutInflater) this.mContext
               .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       convertView = infalInflater.inflate(R.layout.list_row, null);
       signal = (ImageView) convertView.findViewById(R.id.images);
       type = (TextView) convertView.findViewById(R.id.type);
       info = (TextView) convertView.findViewById(R.id.info);
       image.setBackgroundResource(R.drawable.abc);
           Log.d(TAG, "List Size"+values.size());

               type.setText(values.get(position).type);


   }
 ImageView image;
     TextView type;
      TextView info;
   static String TAG= "InfoListAdapter";


   return convertView;

}

}

Answer 2

首先，您必须覆盖适配器的getCount（）方法，如此

@Override
public int getCount() {
    return values .size();
}

然后在你的getView（）方法中你必须做这样的事情

@Override
public View getView(int arg0, View convertView, ViewGroup arg2) {
    ViewHolder holder;
    if (convertView == null) {
        holder = new ViewHolder();
        convertView = layoutInflater.inflate(R.layout.mycartslistcontents,
                null);
        holder.yourImageView= (ImageView) convertView
                .findViewById(R.id.image);
        holder.yourTextView= (TextView) convertView
                .findViewById(R.id.textview);
        convertView.setTag(holder);
    } else
        holder = (ViewHolder) convertView.getTag();

    // here set your textView text and image resource


    return convertView;
}

别忘了像这样在顶部采用全局变量layoutInflater

private LayoutInflater layoutInflater;

并以这种方式在构造函数中初始化它

layoutInflater = LayoutInflater.from(yourContext);

这是您的ViewHolder类

static class ViewHolder {
    ImageView yourImageView;
    TextView yourTextView;
}

自定义ListView只更新最后一个值android

2 个答案: