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)