listview条目全选、取消、单选

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activity_main.xml布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><LinearLayout    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="horizontal" >    <Button        android:id="@+id/main_button"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_weight="1"        android:gravity="center_horizontal"        android:text="下载" />    <Button        android:id="@+id/main_allOrCancle"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_weight="1"        android:gravity="center_horizontal"        android:text="全选" /></LinearLayout><ListView    android:id="@+id/main_listview"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_weight="1" /><TextView    android:id="@+id/main_textview"    android:layout_width="match_parent"    android:layout_height="wrap_content" />

item.xml布局文件

<?xml version="1.0" encoding="utf-8"?>

class Bean

public class Bean {

public String title;
public boolean sf;
}

Clean回调接口

public interface Clean {public void cleanText();

}

listview适配器

package com.example.moreselect;

import java.util.ArrayList;

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

public class MyAdapter extends BaseAdapter{
private Clean clean;
private final Context context;
private final ArrayList list;

public MyAdapter(Context context, ArrayList<Bean> list) {    this.context = context;    this.list = list;}@Overridepublic int getCount() {    // TODO Auto-generated method stub    return list.size();}@Overridepublic Object getItem(int position) {    // TODO Auto-generated method stub    return null;}@Overridepublic long getItemId(int position) {    // TODO Auto-generated method stub    return 0;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {    ViewHolder holder=null;    if(convertView==null){        holder=new ViewHolder();        convertView=View.inflate(context, R.layout.item, null);        holder.title=(TextView) convertView.findViewById(R.id.item_text);        holder.checkBox=(CheckBox) convertView.findViewById(R.id.item_checkbox);        convertView.setTag(holder);    }else{        holder=(ViewHolder) convertView.getTag();    }    final CheckBox cb=holder.checkBox;    cb.setOnClickListener(new OnClickListener() {        @Override        public void onClick(View v) {            if(cb.isChecked()){                cb.setChecked(true);                list.get(position).sf=true;            }else{                list.get(position).sf=false;                cb.setChecked(false);            }            clean.cleanText();//回调方法        }    });    holder.title.setText(list.get(position).title);    cb.setChecked(list.get(position).sf);    return convertView;}class ViewHolder{    TextView title;    CheckBox checkBox;}public void setClean(Clean clean){    this.clean=clean;}

}

MainActivity

package com.example.moreselect;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

private Button main_button;public  TextView main_textview;private ListView main_listview;private ArrayList<Bean> list;private Button main_allOrCancle;private boolean tag=true;private MyAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initData();//模拟数据    initView();//初始化视图    initEvent();//初始化事件}private void initEvent() {    adapter = new MyAdapter(MainActivity.this,list);    main_listview.setAdapter(adapter);    main_button.setOnClickListener(this);//下载的点击事件    main_allOrCancle.setOnClickListener(this);//全选或者取消}private void initData() {    list = new ArrayList<Bean>();    for (int i = 0; i < 50; i++) {        Bean b=new Bean();        b.title="条目"+i+"-------------->";        b.sf=false;        list.add(b);    }}private void initView() {    main_button = (Button) findViewById(R.id.main_button);    main_textview = (TextView) findViewById(R.id.main_textview);    main_listview = (ListView) findViewById(R.id.main_listview);    main_allOrCancle = (Button) findViewById(R.id.main_allOrCancle);}@Overridepublic void onClick(View v) {    switch (v.getId()) {    case R.id.main_button://下载        donwload();        break;    case R.id.main_allOrCancle://全选or取消        selectOrCancle();        break;    default:        break;    }}/** * 全选或者取消的放方法 */private void selectOrCancle() {    if(tag){        main_allOrCancle.setText("取消");        tag=false;        all();        adapter.notifyDataSetChanged();        main_textview.setText("");    }else{        main_allOrCancle.setText("全选");        tag=true;        cancle();        adapter.notifyDataSetChanged();    }}private void cancle() {//取消    for (int i = 0; i < list.size(); i++) {        list.get(i).sf=false;    }}private void all() {//全选    for (int i = 0; i < list.size(); i++) {        list.get(i).sf=true;    }}/** * 下载的方法 */private void donwload() {    StringBuilder sb=new StringBuilder();    sb.append("选择了：");    int count=0;    boolean yn=false;//是否有选中的框    for (int j = 0; j < list.size(); j++) {        if(list.get(j).sf){            yn=true;            sb.append(list.get(j).title+"->");            count++;        }    }    if(yn){//如果有选中的        sb.append("共计："+count+"个");        String str = sb.toString();        main_textview.setText(str);        main_allOrCancle.setText("全选");        tag=true;        cancle();        adapter.notifyDataSetChanged();        adapter.setClean(new Clean() {//回调  点击框用来展示下载信息的  main_textview消息清空            @Override            public void cleanText() {                // TODO Auto-generated method stub                main_textview.setText("");            }        });    }else{        Toast.makeText(MainActivity.this, "请选择", 0).show();    }}

}

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