Android 帶checkbox的listView 實現多選，全選，反選，刪除

activity_main.xml

<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" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="全選" android:layout_weight="1" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="反 選" android:layout_weight="1" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="全不選" android:layout_weight="1" /> <Button android:id="@+id/button4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="刪除" android:layout_weight="1" /> </LinearLayout> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ListView android:id="@+id/listveiw" android:layout_width="match_parent" android:layout_height="match_parent" ></ListView> </LinearLayout>

listveiw.xml

如果ListView的Item中包含CheckBox，由於CheckBox的焦 點優先級高於ListView，所以當選中ListView時，ListView將不會有選中的狀態，解決的方法就是在checkbox組件中加一屬 性：android:focusable="false"

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="ddd" /> <CheckBox android:id="@+id/checkbox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="false"  android:clickable="false"

 android:layout_alignParentRight="true" android:layout_alignParentTop="true" /> </RelativeLayout>

MainActivity.java

package com.bawei.day04_listview;

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

import com.bawei.day04_listview.Adper.ViewHolder;
import com.bawei.vo.Good;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity { private Button button1; private Button button2; private Button button3; private ListView listView; private List<Good> list; private TextView price; private int num = 0; private int pric = 0; private BaseAdapter adapter; private Button button4; private List<Good> li; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.button1);// 全選 button2 = (Button) findViewById(R.id.button2);// 反選 button3 = (Button) findViewById(R.id.button3);// 全不選 button4 = (Button) findViewById(R.id.button4);// 刪除 listView = (ListView) findViewById(R.id.listveiw);// 價格  price = (TextView) findViewById(R.id.price); list = new ArrayList<Good>(); // 賦值 for (int i = 0; i < 60; i++) { list.add(new Good(i + "", false)); } // 適配 adapter = new Adper(list, MainActivity.this); listView.setAdapter(adapter); // 全選 button1.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub  num = 0; pric = 0; for (int i = 0; i < list.size(); i++) { // 改變boolean list.get(i).setBo(true); // 如果為選中 if (list.get(i).getBo()) { num++; pric += Integer.parseInt(list.get(i).getName()); } } // 刷新  adapter.notifyDataSetChanged(); // 顯示 price.setText("一共選了" + num + "件," + "價格是" + pric + "元"); } }); // 反選 button2.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub num = 0; pric = 0; for (int i = 0; i < list.size(); i++) { // 改值 if (list.get(i).getBo()) { list.get(i).setBo(false); } else { list.get(i).setBo(true); } // 刷新  adapter.notifyDataSetChanged(); // 如果為選中 if (list.get(i).getBo()) { num++; pric += Integer.parseInt(list.get(i).getName()); } } // 用TextView顯示 price.setText("一共選了" + num + "件," + "價格是" + pric + "元"); } }); // 全不選 button3.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub num = 0; pric = 0; for (int i = 0; i < list.size(); i++) { // 改值 list.get(i).setBo(false); // 刷新  adapter.notifyDataSetChanged(); // 如果為選中 if (list.get(i).getBo()) { num++; pric += Integer.parseInt(list.get(i).getName()); } } price.setText("一共選了" + num + "件," + "價格是" + pric + "元"); } }); // 刪除1 /* * li = new ArrayList<Good>(); button4.setOnClickListener(new * OnClickListener() { * * public void onClick(View v) { // TODO Auto-generated method stub for * (int i = 0; i < list.size(); i++) { if(list.get(i).getBo()){ * //把要刪除的保存起來 li.add(list.get(i)); * * } * * } //刪除 list.removeAll(li); adapter.notifyDataSetChanged(); num = 0; * pric = 0; price.setText("一共選了"+num+"件,"+"價格是"+pric+"元"); } }); */ // 刪除2 /*button4.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub for (int i = 0; i < list.size(); i++) { if (list.get(i).getBo()) { list.remove(i); i--; } } adapter.notifyDataSetChanged(); num = 0; pric = 0; price.setText("一共選了" + num + "件," + "價格是" + pric + "元"); } });*/ // 刪除3 button4.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub // 獲取list集合對應的迭代器 Iterator it = list.iterator(); while (it.hasNext()) { // 得到對應集合元素 Good g = (Good) it.next(); // 判斷 if (g.getBo()) { // 從集合中刪除上一次next方法返回的元素 it.remove(); } } // 刷新 adapter.notifyDataSetChanged(); num = 0; pric = 0; // 顯示 price.setText("一共選了" + num + "件," + "價格是" + pric + "元"); } }); // 綁定listView的監聽器 listView.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub // 取得ViewHolder對象 ViewHolder viewHolder = (ViewHolder) arg1.getTag(); // 改變CheckBox的狀態 viewHolder.checkBox.toggle(); // 將CheckBox的選中狀況記錄下來 list.get(arg2).setBo(viewHolder.checkBox.isChecked()); // 調整選定條目 if (viewHolder.checkBox.isChecked() == true) { num++; pric += Integer.parseInt(list.get(arg2).getName()); } else { num--; pric -= Integer.parseInt(list.get(arg2).getName()); } // 用TextView顯示 price.setText("一共選了" + num + "件," + "價格是" + pric + "元"); } }); } }

List的Vo類Good.java

package com.bawei.vo;

public class Good { private String name; private boolean bo; public String getName() { return name; } public void setName(String name) { this.name = name; } public boolean getBo() { return bo; } public void setBo(boolean bo) { this.bo = bo; } @Override public String toString() { return "Good [name=" + name + ", bo=" + bo + "]"; } public Good(String name, boolean bo) { super(); this.name = name; this.bo = bo; } public Good() { super(); } }

 

適配Adper.java

package com.bawei.day04_listview;

import java.util.List;

import com.bawei.vo.Good;

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

public class Adper extends BaseAdapter { List<Good> list; Context context; public Adper(List<Good> list, Context context) { // TODO Auto-generated constructor stub this.list=list; this.context=context; } public int getCount() { // TODO Auto-generated method stub return list.size(); } public Object getItem(int position) { // TODO Auto-generated method stub return null; } public long getItemId(int position) { // TODO Auto-generated method stub return 0; } public View getView(final int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub  final ViewHolder viewHolder; if(convertView==null){ convertView=View.inflate(context, R.layout.listveiw, null); viewHolder=new ViewHolder(); viewHolder.textView=(TextView) convertView.findViewById(R.id.text); viewHolder.checkBox=(CheckBox) convertView.findViewById(R.id.checkbox); convertView.setTag(viewHolder); }else{ viewHolder=(ViewHolder) convertView.getTag(); } viewHolder.textView.setText("價格："+list.get(position).getName()); //顯示checkBox viewHolder.checkBox.setChecked(list.get(position).getBo()); return convertView; } class ViewHolder{ TextView textView; CheckBox checkBox; } }