ListView单选的实现总结

今天在智能停车场项目中需要实现PullToRefreshListView的单选功能，考虑到分页，刷新等，以前的实现方式是采用自己维护一个集合保存选中位置的选中状态，但这个方式比较繁琐，今天采用了listview的单选模式

listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);来实现：

ListView是通过实现Checkable接口来处理单选模式的，这要求Item的视图实现Checkable接口，创建ChoiceListItemView类来实现该接口，ListView选中某个Item时，会调用ChoiceListItemView类的setChecked的方法：

自定义Adapter

1. package com.centrvideo.parkapp.adapter;
   import java.util.List;
   import android.content.Context;
   import android.view.View;
   import android.view.ViewGroup;
   import android.widget.ListView;
   import com.centrvideo.parkapp.demain.ExportInfo;
   public class ExportAdapter extends MyBaseAdapter<ExportInfo, ListView> {
       public ExportAdapter(Context context, List<ExportInfo> list) {
           super(context, list);
       }
       @Override
       public View getView(int position, View covertView, ViewGroup group) {
           ChoiceListItemView view;
           if (covertView == null) {
               view = new ChoiceListItemView(context, null);
           } else {
               view = (ChoiceListItemView) covertView;
           }
           ExportInfo exportInfo = list.get(position);
           view.setData(exportInfo);
           return view;
       }
   }

2、自定义ListView的item视图

1. package com.centrvideo.parkapp.adapter;
   import android.content.Context;
   import android.util.AttributeSet;
   import android.view.LayoutInflater;
   import android.view.View;
   import android.widget.CheckBox;
   import android.widget.Checkable;
   import android.widget.ImageView;
   import android.widget.LinearLayout;
   import android.widget.TextView;
   import com.centrvideo.parkapp.R;
   import com.centrvideo.parkapp.demain.ExportInfo;
   import com.centrvideo.parkapp.util.ImageLoaderUtils;
   import com.lidroid.xutils.ViewUtils;
   import com.lidroid.xutils.view.annotation.ViewInject;
   
   public class ChoiceListItemView extends LinearLayout implements Checkable {
   
       @ViewInject(R.id.listview_export_image)
       private ImageView listview_export_image;
       @ViewInject(R.id.listview_export_entrytime)
       private TextView listview_export_entrytime;
       @ViewInject(R.id.listview_export_number)
       private TextView listview_export_number;
       @ViewInject(R.id.listview_entry_time)
       private TextView listview_entry_time;
       @ViewInject(R.id.cb_export)
       public CheckBox selectBtn;
       private ImageLoaderUtils imageLoaderUtils;
       public ChoiceListItemView(Context context, AttributeSet attrs) {
           super(context, attrs);
           LayoutInflater inflater = LayoutInflater.from(context);
           View v = inflater.inflate(R.layout.listview_export, this, true);
           ViewUtils.inject(v);
           imageLoaderUtils = ImageLoaderUtils.newInstance();
       }
   
       public void setData(ExportInfo exportInfo) {
           imageLoaderUtils.loadImage(exportInfo.getEntryimg(),
                   listview_export_image, R.drawable.cell_hold);
           listview_export_entrytime.setText("入口时间:"
                   + exportInfo.getEntrytime() + "");
           listview_export_number.setText("车牌号码:"
                   + exportInfo.getPlatenumber() + "");
           listview_entry_time.setText("位置：" + exportInfo.getGatewayname()
                   + "");
       }
   
       @Override
       public boolean isChecked() {
           return selectBtn.isChecked();
       }
   
       @Override
       public void setChecked(boolean checked) {
           selectBtn.setChecked(checked);
           //根据是否选中来选择不同的背景图片
           if (checked) {
               selectBtn.setBackgroundResource(R.drawable.cheliangduibi_queding);
           } else {
               selectBtn.setBackgroundResource(0);
           }
       }
   
       @Override
       public void toggle() {
           selectBtn.toggle();
       }
   
   }

3、Activity中调用：

//启用单选模式
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);  

//获得选中结果；通过listView.getCheckedItemPosition();//活动被选中的位置
    case R.id.tv_titlebar_right:
            if (CommonUtil.isFastDoubleClick()) {
                return;
            }

            int  selectPosition = listView.getCheckedItemPosition();
            CommonUtil.StartToast(ExportSureListActivity.this,"被选中的位置:"+selectPosition);
             ExportInfo   exportInfo  = list1.get(selectPosition-1);//注意这里需要减1
             CommonUtil.StartToast(ExportSureListActivity.this,"被选中的位置:"+exportInfo.toString());
//            intent = new Intent(ExportSureListActivity.this,
//                    ChargeActivity.class);
//            startActivity(intent);
            break;
        }  

来自为知笔记(Wiz)