Android Listview与Checkbox结合实现选择，删除，显示选择结果
网上有很多Listview与Checbox结合的例子，大多都存在这样那样的问题，要么选择异常，要么滚动Listview后选择消失，要么删除异常，要么无法正常显示选择结果。
以下为真正无误的，实用的Listview与Checkbox结合实现选择，删除，显示选择结果。
MainActivity.java
package com.example.listviewcheckbox;
import java.util.ArrayList;
import java.util.List;
import com.example.listviewcheckbox.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
Button show;
Button select;
Button deselect;
ListView lv;
Context mContext;
MyListAdapter adapter;
List<Integer> selected = new ArrayList<Integer>();
private List<Item> items;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//mContext = getApplicationContext();
mContext = MainActivity.this;
select = (Button)findViewById(R.id.select);
deselect = (Button)findViewById(R.id.deselect);
show = (Button)findViewById(R.id.show);
lv = (ListView)findViewById(R.id.lv);
items = new ArrayList<Item>();
for(int i=0;i< 50;i++){
Item item = new Item();
item.name = "wxz"+i;
item.address = "ZhengZhou";
item.checked = false;
items.add(item);
}
adapter = new MyListAdapter(items);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
items.get(position).checked = !items.get(position).checked;
adapter.notifyDataSetChanged();
Toast.makeText(mContext, "单击:"+items.get(position).name +",id:"+id, Toast.LENGTH_SHORT).show();
}
});
select.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int k = items.size();
for(int i=0; i<k; i++){
items.get(i).checked = true;
}
adapter.notifyDataSetChanged();
}
});
deselect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int k = items.size();
for(int i=0; i<k; i++){
items.get(i).checked = false;
}
adapter.notifyDataSetChanged();
}
});
show.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selected.clear();
int k = items.size();
for(int i=0; i<k; i++){
if(items.get(i).checked){
selected.add(i);
}
}
k = selected.size();
if(k ==0){
AlertDialog.Builder builder1 = new AlertDialog.Builder(MainActivity.this);
builder1.setMessage("没有选中任何记录");
builder1.show();
}else{
StringBuilder sb = new StringBuilder();
for(int i=0; i<k; i++){
int j = selected.get(i);
sb.append("ID="+(j)+" Name ="+items.get(j).name+"\n");
}
AlertDialog.Builder builder2 = new AlertDialog.Builder(MainActivity.this);
builder2.setMessage(sb.toString());
builder2.show();
}
}
});
}
//自定义ListView适配器
class MyListAdapter extends BaseAdapter{
//private Context context;
LayoutInflater inflater;
public List<Item> items;
public MyListAdapter(List<Item> items){
this.items = items;
inflater = LayoutInflater.from(mContext);
}
@Override
public int getCount() {
// 返回值控制该Adapter将会显示多少个列表项
return items == null ? 0 : items.size();
}
@Override
public Object getItem(int position) {
// 返回值决定第position处的列表项的内容
return items.get(position);
}
@Override
public long getItemId(int position) {
// 返回值决定第position处的列表项的ID
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
Item item = items.get(position);
if (convertView == null) {
Log.e("MainActivity","position1 = "+position);
convertView = inflater.inflate(R.layout.listitem, null);
holder = new ViewHolder();
holder.btnDel = (Button)convertView.findViewById(R.id.btnDel);
holder.cbCheck = (CheckBox)convertView.findViewById(R.id.cbCheck);
holder.tvName = (TextView)convertView.findViewById(R.id.tvName);
holder.tvAddress = (TextView)convertView.findViewById(R.id.tvAddress);
holder.tvName.setText(item.name);
holder.tvAddress.setText(item.address);
convertView.setTag(holder);
}else{
Log.e("MainActivity","position2 = "+position);
holder = (ViewHolder)convertView.getTag();
holder.cbCheck.setChecked(item.checked);
holder.tvName.setText(item.name);
holder.tvAddress.setText(item.address);
}
holder.btnDel.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//删除list中的数据
items.remove(position);
//通知列表数据修改
adapter.notifyDataSetChanged();
}
});
holder.cbCheck.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
CheckBox cb = (CheckBox)v;
items.get(position).checked = cb.isChecked();
}
});
return convertView;
}
}
static class ViewHolder{
public CheckBox cbCheck;
public TextView tvName;
public TextView tvAddress;
public Button btnDel;
}
class Item {
private String name;
private String address;
private Boolean checked;
}
}
列表项listitem.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants"
android:orientation="horizontal" >
<CheckBox
android:id="@+id/cbCheck"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:focusable="false" />
<ImageView
android:id="@+id/ivPhoto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"/>
<TextView
android:id="@+id/tvName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_weight="1"
android:text="Name"
android:textSize="18sp" />
<TextView
android:id="@+id/tvAddress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_weight="1"
android:text="Address"
android:textSize="18sp" />
<Button
android:id="@+id/btnDel"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_marginRight="16dp"
android:layout_marginTop="5dp"
android:focusable="false"
android:text="删除"
android:textSize="16sp" />
</LinearLayout>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/select"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Select"/>
<Button
android:id="@+id/deselect"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Deselect" />
<Button
android:id="@+id/show"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Show"/>
</LinearLayout>
<ListView
android:id="@+id/lv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fastScrollEnabled="true"
android:fastScrollAlwaysVisible="true"/>
</LinearLayout>
源码：http://download.csdn.net/detail/xinzheng_wang/5973407