Question

        setListAdapter(new MyAdapter(this, android.R.layout.simple_list_item_1,
                R.id.textView1,
                (String[]) myArr.toArray(new String[]{})));
    }

         class MyAdapter extends ArrayAdapter<String>{
                             final int which;

                public MyAdapter(Context context, int resource,
                    int textViewResourceId, String[] string) {
                    super(context, resource, textViewResourceId, string);
                    // TODO Auto-generated constructor stub
                }

                @Override
                public View getView(int position, View convertView, ViewGroup parent) {
                    int which=position;
                    LayoutInflater inflater =  (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    View row = inflater.inflate(R.layout.custom_view, parent,false);            
                    TextView tv = (TextView) row.findViewById(R.id.textView1);
                    ImageView iv = (ImageView) row.findViewById(R.id.imageView1);
                    ToggleButton tb = (ToggleButton) row.findViewById(R.id.toggleButton1);

                    tv.setTag(position);
                    iv.setTag(position);
                    tb.setTag(position);

                    tv.setText(myArr.get(position).toString());

                    tb.setOnClickListener(new OnClickListener() {



                    @Override
                    public void onClick(View v) {
                        if(tb.isChecked()){
                                    which=(Integer) tb.getTag();

                        }else{

                        }


                    }
                    });

                    return row;
                }
        }

}

您好我正在尝试使用setTag视图方法来检测按下的项目。我的布局由一个列表组成，每行包含一个文本字段，一个togglebutton和一个imageview。我想更改包含按下按钮的行的图像。我走了这么远，我坚持如何继续，我可以得到一些帮助吗？

Answer 1

您可以简单地将位置传递给getView(final int position, View convertView, ViewGroup parent)。只需将其设为最终版并直接访问它而无需制作标签。

但是，您应该使用视图标记来处理android提供的可滚动视图。

class MyAdapter extends ArrayAdapter<String>{
                             final int which;
ArrayList<Boolean> mListImageStates = new ArrayList<Boolean>();
 public MyAdapter(Context context, int resource,
   int textViewResourceId, String[] string) {
   super(context, resource, textViewResourceId, string);
    for(int i = 0; i<string.length;i++)
    {
        mListImageStates.add(new Boolean(false));
    }
 }
@Override
public View getView(int position, View convertView, ViewGroup parent) {
int which=position;
LayoutInflater inflater =  (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

 ChildViewHolder holder = new ChildViewHolder();
 if(convertView == null){
      convertView = inflater.inflate(R.layout.custom_view, parent,false);
      holder.mTv = (TextView) row.findViewById(R.id.textView1);
      holder.mIv = (ImageView) row.findViewById(R.id.imageView1);
      holder.mTb = (ToggleButton) row.findViewById(R.id.toggleButton1);
      convertView.setTag(holder)}
 else
 {
      holder = (ChildViewHolder) convertView.getTag();
 }
 holder.mTv.setText(myArr.get(position).toString());

  holder.mTb.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {        
         boolean listState = mListImageStates.get(position);
         mListImageStates.set(position,new Boolean(!listState));
         notifyDataSetChanged();

}});

if(mListImageStates.get(position) == false)
{
//TODO
}else
{
//TODO
}

   return convertView;
}
class ChildViewHolder
{
    public TextView mTv;
    public ImageView mIv;
    public ToggleButton mTb;
}

使用SetTag方法选择ListView项

1 个答案: