activity_main.xml
"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="全选" android:layout_weight="1" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="反 选" android:layout_weight="1" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="全不选" android:layout_weight="1" /> <Button android:id="@+id/button4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="删除" android:layout_weight="1" /> <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" >
listveiw.xml
如果ListView的Item中包含CheckBox，由于CheckBox的焦点优先级高于ListView，所以当选中ListView时，ListView将不会有选中的状态，解决的方法就是在checkbox组件中加一属性：android:focusable="false"
"1.0" encoding="utf-8"?>"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" />
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 Listlist; private TextView price; private int num = 0; private int pric = 0; private BaseAdapter adapter; private Button button4; private List li; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.button1);// 全选 button2 = (Button) findViewById(R.id.button2);// 反选 button3 = (Button) findViewById(R.id.button3);// 全不选 button4 = (Button) findViewById(R.id.button4);// 删除 listView = (ListView) findViewById(R.id.listveiw);// 价格 price = (TextView) findViewById(R.id.price); list = new ArrayList (); // 赋值 for (int i = 0; i < 60; i++) { list.add(new Good(i + "", false)); } // 适配 adapter = new Adper(list, MainActivity.this); listView.setAdapter(adapter); // 全选 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++) { // 改变boolean list.get(i).setBo(true); // 如果为选中 if (list.get(i).getBo()) { num++; pric += Integer.parseInt(list.get(i).getName()); } } // 刷新 adapter.notifyDataSetChanged(); // 显示 price.setText("一共选了" + num + "件," + "价格是" + pric + "元"); } }); // 反选 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(); // 如果为选中 if (list.get(i).getBo()) { num++; pric += Integer.parseInt(list.get(i).getName()); } } // 用TextView显示 price.setText("一共选了" + num + "件," + "价格是" + pric + "元"); } }); // 全不选 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(); // 如果为选中 if (list.get(i).getBo()) { num++; pric += Integer.parseInt(list.get(i).getName()); } } price.setText("一共选了" + num + "件," + "价格是" + pric + "元"); } }); // 删除1 /* * li = new ArrayList (); 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()){ * //把要删除的保存起来 li.add(list.get(i)); * * } * * } //删除 list.removeAll(li); adapter.notifyDataSetChanged(); num = 0; * pric = 0; price.setText("一共选了"+num+"件,"+"价格是"+pric+"元"); } }); */ // 删除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("一共选了" + num + "件," + "价格是" + pric + "元"); } });*/ // 删除3 button4.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub // 获取list集合对应的迭代器 Iterator it = list.iterator(); while (it.hasNext()) { // 得到对应集合元素 Good g = (Good) it.next(); // 判断 if (g.getBo()) { // 从集合中删除上一次next方法返回的元素 it.remove(); } } // 刷新 adapter.notifyDataSetChanged(); num = 0; pric = 0; // 显示 price.setText("一共选了" + num + "件," + "价格是" + pric + "元"); } }); // 绑定listView的监听器 listView.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub // 取得ViewHolder对象 ViewHolder viewHolder = (ViewHolder) arg1.getTag(); // 改变CheckBox的状态 viewHolder.checkBox.toggle(); // 将CheckBox的选中状况记录下来 list.get(arg2).setBo(viewHolder.checkBox.isChecked()); // 调整选定条目 if (viewHolder.checkBox.isChecked() == true) { num++; pric += Integer.parseInt(list.get(arg2).getName()); } else { num--; pric -= Integer.parseInt(list.get(arg2).getName()); } // 用TextView显示 price.setText("一共选了" + num + "件," + "价格是" + pric + "元"); } }); } }
List的Vo类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(); } }
适配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 { Listlist; Context context; public Adper(List 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("价格："+list.get(position).getName()); //显示checkBox viewHolder.checkBox.setChecked(list.get(position).getBo()); return convertView; } class ViewHolder{ TextView textView; CheckBox checkBox; } }
