Android ListView带CheckBox实现单选

这个应该是个经常会遇到的需求，网上找了很多的demo感觉说的有点太长于是自己抽空干脆记录一下，目前我实现listView带CheckBox单选主要用两种方法

1，用一个bean记录状态，每次getView的时候去判断这个bean的状态

2，判断点击的position是否跟getView的position一致，这种办法耦合性较低不建议使用

效果图：

第1种方法：

首先是我们的bean：

public class Bean {
private boolean isChecked;
private String msg = "这是一条测试数据";

public Bean(){

}
public Bean(boolean isCheched) {
this.isChecked = isCheched;
}
public boolean isChecked() {
return isChecked;
}
public void setChecked(boolean isChecked) {
this.isChecked = isChecked;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}

public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder mViewHolder;
if(convertView == null){
convertView = mInfater.inflate(R.layout.list_item, null);
mViewHolder = new ViewHolder(convertView);
convertView.setTag(mViewHolder);
}else{
mViewHolder = (ViewHolder) convertView.getTag();
}
mViewHolder.mTextView.setText(mDatas.get(position).getMsg());
if(mDatas.get(position).isChecked()){//状态选中
mViewHolder.mCheckBox.setChecked(true);
}else{
mViewHolder.mCheckBox.setChecked(false);
}
return convertView;
}

这样我们就能通过bean的状态来控制checkBox的选中与否了，但是onItemCLick的时候的操作才是关键

public class MainActivity extends ActionBarActivity {
private ListView mListView;
private ListAdapter mAdapter;
private List<Bean> mDatas;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = (ListView) findViewById(R.id.main_listView);
mDatas = new ArrayList<Bean>();
for (int i = 0; i < 20; i++) {
if(i == 0){//默认选中第一个
mDatas.add(new Bean(true));
continue;
}
mDatas.add(new Bean(false));
}
mAdapter = new ListAdapter(this, mDatas);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(mOnItemClickListener);
}

private final OnItemClickListener mOnItemClickListener = new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long arg3) {
for (Bean bean : mDatas) {//全部设为未选中
bean.setChecked(false);
}
mDatas.get(position).setChecked(true);//点击的设为选中
mAdapter.notifyDataSetChanged();

}
};
}

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >

<TextView
android:id="@+id/main_list_item_text"
android:layout_width="0dp"
android:layout_height="match_parent"
android:textColor="@android:color/black"
android:layout_weight="1"
android:gravity="center_vertical"
/>
<!-- checkBox获取事件的优先级大于listView故需设置focusable = false -->
<CheckBox
android:id="@+id/main_list_item_checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:backgroundTintMode="multiply"
android:layout_marginRight="10dp"
android:clickable="false"
android:focusableInTouchMode="false"
android:focusable="false"
/>
</LinearLayout>

于是这样ListView的CheckBox就能实现单选了

第二种：

public class MainActivity extends ActionBarActivity {
private ListView mListView;
private ListAdapter mAdapter;
private List<Bean> mDatas;
public static int pos;//记录选中的position
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = (ListView) findViewById(R.id.main_listView);
mDatas = new ArrayList<Bean>();
for (int i = 0; i < 20; i++) {
if(i == 0){
mDatas.add(new Bean(true));
continue;
}
mDatas.add(new Bean(false));
}
mAdapter = new ListAdapter(this, mDatas);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(mOnItemClickListener);
}

private final OnItemClickListener mOnItemClickListener = new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long arg3) {
pos = position;
mAdapter.notifyDataSetChanged();
}
};

}

getView的时候判断MainActivity的pos是否等于getView的position

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder mViewHolder;
if(convertView == null){
convertView = mInfater.inflate(R.layout.list_item, null);
mViewHolder = new ViewHolder(convertView);
convertView.setTag(mViewHolder);
}else{
mViewHolder = (ViewHolder) convertView.getTag();
}
mViewHolder.mTextView.setText(mDatas.get(position).getMsg());
if(MainActivity.pos == position){//MainActivity的pos是否等于position
mViewHolder.mCheckBox.setChecked(true);
}else{
mViewHolder.mCheckBox.setChecked(false);
}
return convertView;
}

不推荐使用第二种办法，这种办法会让程序的耦合性变得很低，并且全局变量始终会有一个Class 对象的句柄指向它除非这个Class对象要被回收了否则静态变量是不会被GC掉

以上仅是个人用法，当然也有其他办法实现，看个人的喜好吧