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"
<?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>
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MainActivity.java
package com.bawei.day04_listview;
import java.util.ArrayList; 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; @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 listView = (ListView) findViewById(R.id.listveiw);//价格 price = (TextView) findViewById(R.id.price); list = new ArrayList<Good>(); //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"); } }); // 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"); } }); }
}
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list的vo包Good.java
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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(); }
}
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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("价格:"+list.get(position).getName()); //显示checkBox viewHolder.checkBox.setChecked(list.get(position).getBo()); return convertView; } class ViewHolder{ TextView textView; CheckBox checkBox; } }
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