Android 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;
        }  

 

 





posted @ 2015-09-19 11:53  ---风雨无阻--  阅读(4813)  评论(1编辑  收藏  举报