ListView的CheckBox实现全部选中/不选中

在Adapter类中定义一个HashMap列表，保存每一行是否被选中：

private static HashMap<Integer, Boolean> isSelected;

可见定义了名为isSelected的HashMap列表，再定义它的getter和setter方法：

    public static void setIsSelected(HashMap<Integer, Boolean> isSelected)   {
        MyAdapter.isSelected = isSelected;
    }

    public static HashMap<Integer, Boolean> getIsSelected() {
        return isSelected;
    }

在Adapter类的构造方法中，将isSelected的所有初始值设置为false：

    public MyAdapter(Context context, List<String> list){
        this.context = context;
        this.list = list;
        isSelected = new HashMap<Integer, Boolean>();
        initData();
    }

    private void initData() {
        for (int i = 0; i < list.size(); i++) {
            getIsSelected().put(i, false);
        }
    }

在getView方法中，定义CheckBox的点击方法，当CheckBox选中/不选中时设置isSelected的值为true/false；同时根据isSelected的值设置CheckBox是否选中，并显示相应的图标：

        mCheckbox = (CheckBox)convertView.findViewById(R.id.chkBox);
        mCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener(){
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if (isChecked){
                    buttonView.setButtonDrawable(R.drawable.r02);
                    isSelected.put(position, true);
                }else{
                    buttonView.setButtonDrawable(R.drawable.r01);
                    isSelected.put(position, false);
                }
            }
        });
        mCheckbox.setChecked(getIsSelected().get(position));
        if (getIsSelected().get(position)){
            mCheckbox.setButtonDrawable(R.drawable.r02);
        }else{
            mCheckbox.setButtonDrawable(R.drawable.r01);
        }

在主窗体文件中，当点击列表下面的CheckBox时，调用selectAll方法将isSelected的所有值设置为true/false，同时显示相应的图标：

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()){
        case R.id.chkSelect:
            selectAll(chkSelect.isChecked());
            break;
        case R.id.btnDelete:
            break;
        default:
            break;
        }

    }

    private void selectAll(boolean x){
        for (int i=0; i<mList.size(); i++){
            mAdapter.getIsSelected().put(i, x);
        }
        if (chkSelect.isChecked()){
            chkSelect.setButtonDrawable(R.drawable.r02);
        }else{
            chkSelect.setButtonDrawable(R.drawable.r01);
        }
        mAdapter.notifyDataSetChanged();
    }

完整的文件如下。

MainActivity.java：

package com.hzhi.mylistview;

import android.support.v7.app.ActionBarActivity;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;

public class MainActivity extends ActionBarActivity implements OnClickListener{

    private CheckBox chkSelect;
    private Button btnDelete;
    private List<String> mList;
    private MyAdapter mAdapter;
    private ListView mListview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();
        initData();
        mAdapter = new MyAdapter(MainActivity.this, mList);
        mListview.setAdapter(mAdapter);
    }

    private void initView(){
        chkSelect = (CheckBox) findViewById(R.id.chkSelect);
        btnDelete = (Button) findViewById(R.id.btnDelete);
        mListview = (ListView) findViewById(R.id.lstView);

        chkSelect.setOnClickListener(this);
        btnDelete.setOnClickListener(this);

        chkSelect.setButtonDrawable(R.drawable.r01);
    }

    private void initData(){
        mList = new ArrayList<String>();
        for (int i=0; i<10; i++){
            mList.add("第" + String.valueOf(i) + "条数据");
        }
    }

    private void selectAll(boolean x){
        for (int i=0; i<mList.size(); i++){
            mAdapter.getIsSelected().put(i, x);
        }
        if (chkSelect.isChecked()){
            chkSelect.setButtonDrawable(R.drawable.r02);
        }else{
            chkSelect.setButtonDrawable(R.drawable.r01);
        }
        mAdapter.notifyDataSetChanged();
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()){
        case R.id.chkSelect:
            selectAll(chkSelect.isChecked());
            break;
        case R.id.btnDelete:
            break;
        default:
            break;
        }

    }

}

MyAdapter.java：

package com.hzhi.mylistview;

import java.util.HashMap;
import java.util.List;

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.CompoundButton;
import android.widget.TextView;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MyAdapter extends BaseAdapter{

    List<String> list;
    Context context;
    private static HashMap<Integer, Boolean> isSelected;

    public MyAdapter(Context context, List<String> list){
        this.context = context;
        this.list = list;
        isSelected = new HashMap<Integer, Boolean>();
        initData();
    }

    private void initData() {
        for (int i = 0; i < list.size(); i++) {
            getIsSelected().put(i, false);
        }
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        CheckBox mCheckbox;
        TextView mText;

        if(convertView == null){
            convertView = LayoutInflater.from(context).inflate(R.layout.listitem, null);
        }
        mCheckbox = (CheckBox)convertView.findViewById(R.id.chkBox);
        mCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener(){
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                if (isChecked){
                    buttonView.setButtonDrawable(R.drawable.r02);
                    isSelected.put(position, true);
                }else{
                    buttonView.setButtonDrawable(R.drawable.r01);
                    isSelected.put(position, false);
                }
            }
        });
        mCheckbox.setChecked(getIsSelected().get(position));
        if (getIsSelected().get(position)){
            mCheckbox.setButtonDrawable(R.drawable.r02);
        }else{
            mCheckbox.setButtonDrawable(R.drawable.r01);
        }

        mText = (TextView)convertView.findViewById(R.id.txtText);
        mText.setText(list.get(position).toString());

        return convertView;
    }

    public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {
        MyAdapter.isSelected = isSelected;
    }

    public static HashMap<Integer, Boolean> getIsSelected() {
        return isSelected;
    }

}

运行效果如下：

选中最下面的CheckBox后，实现全部选中：