Android(安卓)listview--checkbox

1. Code

1） adapter class

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;

public class CheckBoxAdapter extends BaseAdapter {
    private LayoutInflater mInflater;
    private List> mData;
    public static Map isSelected;

    public MyAdapter(Context context) {
        mInflater = LayoutInflater.from(context);
        init();
    }

    //初始化
    private void init() {
        mData=new ArrayList>();
        for (int i = 0; i < 5; i++) {
            Map map = new HashMap();
            map.put("img", R.drawable.icon);
            map.put("title", "第" + (i + 1) + "行的标题");
            mData.add(map);
        }
        //这儿定义isSelected这个map是记录每个listitem的状态，初始状态全部为false。
        isSelected = new HashMap();
        for (int i = 0; i < mData.size(); i++) {
            isSelected.put(i, false);
        }
    }

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

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        //convertView为null的时候初始化convertView。
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = mInflater.inflate(R.layout.vlist, null);
            holder.img = (ImageView) convertView.findViewById(R.id.img);
            holder.title = (TextView) convertView.findViewById(R.id.title);
            holder.cBox = (CheckBox) convertView.findViewById(R.id.cb);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.img.setBackgroundResource((Integer) mData.get(position).get(
                "img"));
        holder.title.setText(mData.get(position).get("title").toString());
        holder.cBox.setChecked(isSelected.get(position));
        return convertView;
    }

    public final class ViewHolder {
        public ImageView img;
        public TextView title;
        public CheckBox cBox;
    }
}

2) xml布局

<?xml version="1.0" encoding="utf-8"?>
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
            android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"/>
            android:id="@+id/title"
        android:textSize="18dip"
        android:layout_weight="1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
            android:id="@+id/cb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:clickable="false"
        android:checkMark="?android:attr/listChoiceIndicatorMultiple"/>

由于checkbox的点击事件优先级比listview的高，所以要在checkbox中添加android:focusable="false"，使得checkbox初始的时候没有获取焦点。

2. Call

1) set value

    list=(ListView)findViewById(R.id.lv);
            MyAdapter adapter=new MyAdapter(this);
            list.setAdapter(adapter);
            list.setItemsCanFocus(false);
            list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

            list.setOnItemClickListener(new OnItemClickListener(){
                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
                    ViewHolder vHollder = (ViewHolder) view.getTag();
    //在每次获取点击的item时将对于的checkbox状态改变，同时修改map的值。
                    vHollder.cBox.toggle();
                    MyAdapter.isSelected.put(position, vHollder.cBox.isChecked());
                }
            });

2) get value

OnClickListener bPop = new OnClickListener() {
        @Override
        public void onClick(View v) {
            for(int i=0;i                if(MyAdapter.isSelected.get(i)){
                    ViewHolder vHollder = (ViewHolder) list.getChildAt(i).getTag();
Log.i(TAG, "--onClick --"+vHollder.title.getText());
                }
            }
        }
    };

转载于:https://www.cnblogs.com/tyler2000/archive/2012/04/18/android_listview_checkBox.html

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