android checkbox实现单选功能,Android中ListView + CheckBox实现单选、多选效果

还是先来看看是不是你想要的效果：

不废话，直接上代码，很简单，代码里都有注释

1 单选

public class SingleActivity extends AppCompatActivity {

private ListView listView;

private ArrayList groups;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_single);

listView = (ListView) this.findViewById(R.id.lvGroup);

groups = new ArrayList();

groups.add("11");

groups.add("22");

groups.add("33");

groups.add("44");

groups.add("55");

groups.add("66");

groups.add("77");

AdapterView.OnItemClickListener listItemClickListener = new AdapterView.OnItemClickListener() {

@Override

public void onItemClick(AdapterView> parent,View view,int position,long id) {

// 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤

SingleAdapter.ViewHolder viewHolder = (SingleAdapter.ViewHolder) view.getTag();

viewHolder.cb.toggle();// 把CheckBox的选中状态改为当前状态的反,gridview确保是单一选中

}

};

SingleAdapter adapter = new SingleAdapter(this,groups);

listView.setAdapter(adapter);

listView.setOnItemClickListener(listItemClickListener);

}

}

Adapter：

public class SingleAdapter extends BaseAdapter {

private Activity activity;//上下文

private ArrayList list;

private LayoutInflater inflater = null;//导入布局

private int temp = -1;

public SingleAdapter(Activity context,ArrayList list) {

this.activity = context;

this.list = list;

inflater = LayoutInflater.from(context);

}

@Override

public int getCount() {

return list.size();

}

@Override

public Object getItem(int position) {

return list.get(position);

}

@Override

public long getItemId(int position) {

return position;

}

//listview每显示一行数据,该函数就执行一次

@Override

public View getView(int position,View convertView,ViewGroup parent) {

ViewHolder holder = null;

if (convertView == null) {//当第一次加载ListView控件时 convertView为空

convertView = inflater.inflate(R.layout.group_item_view,null);//所以当ListView控件没有滑动时都会执行这条语句

holder = new ViewHolder();

holder.tv = (TextView) convertView.findViewById(R.id.item_tv);

holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);

convertView.setTag(holder);//为view设置标签

} else {//取出holder

holder = (ViewHolder) convertView.getTag();

}

//设置list的textview显示

holder.tv.setTextColor(Color.WHITE);

holder.tv.setText(list.get(position));

// 根据isSelected来设置checkBox的选中状况

holder.cb.setId(position);//对checkBox的id进行重新设置为当前的position

holder.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(CompoundButton compoundButton,boolean isChecked) {

if (isChecked) {//实现checkBox的单选功能,同样适用于radiobutton

if (temp != -1) {

//找到上次点击的checkBox,并把它设置为false,对重新选择时可以将以前的关掉

CheckBox tempCheckBox = (CheckBox) activity.findViewById(temp);

if (tempCheckBox != null)

tempCheckBox.setChecked(false);

}

temp = compoundButton.getId();//保存当前选中的checkBox的id值

}

}

});

if (position == temp)//比对position和当前的temp是否一致

holder.cb.setChecked(true);

else

holder.cb.setChecked(false);

return convertView;

}

public static class ViewHolder {

TextView tv;

CheckBox cb;

}

}

多选：

public class MulActivity extends AppCompatActivity {

private ListView listView;

private ArrayList groups;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_mul);

listView = (ListView) this.findViewById(R.id.list);

groups = new ArrayList<>();

groups.add("11");

groups.add("22");

groups.add("33");

groups.add("44");

groups.add("55");

groups.add("66");

groups.add("77");

AdapterView.OnItemClickListener listItemClickListener = new AdapterView.OnItemClickListener() {

@Override

public void onItemClick(AdapterView> parent,long id) {

// 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤

MulAdapter.ViewHolder viewHolder = (MulAdapter.ViewHolder) view.getTag();

viewHolder.cb.toggle();// 把CheckBox的选中状态改为当前状态的反,gridview确保是单一选中

MulAdapter.getIsSelected().put(position,viewHolder.cb.isChecked());//将CheckBox的选中状况记录下来

}

};

MulAdapter adapter = new MulAdapter(this,groups);

listView.setAdapter(adapter);

listView.setOnItemClickListener(listItemClickListener);

}

}

Adapter：

public class MulAdapter extends BaseAdapter {

private Context context;//上下文

private ArrayList list;

//控制CheckBox选中情况

private static HashMap isSelected;

private LayoutInflater inflater = null;//导入布局

public MulAdapter(Context context,ArrayList list) {

this.context = context;

this.list = list;

inflater = LayoutInflater.from(context);

isSelected = new HashMap();

initData();

}

private void initData() {//初始化isSelected的数据

for (int i = 0; i < list.size(); i++) {

getIsSelected().put(i,false);

}

}

@Override

public int getCount() {

return list.size();

}

@Override

public Object getItem(int position) {

return list.get(position);

}

@Override

public long getItemId(int position) {

return position;

}

//listview每显示一行数据,null);//所以当ListView控件没有滑动时都会执行这条语句

holder = new ViewHolder();

holder.tv = (TextView) convertView.findViewById(R.id.item_tv);

holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);

convertView.setTag(holder);//为view设置标签

} else {//取出holder

holder = (ViewHolder) convertView.getTag();//the Object stored in this view as a tag

}

//设置list的textview显示

holder.tv.setTextColor(Color.WHITE);

holder.tv.setText(list.get(position));

// 根据isSelected来设置checkBox的选中状况

holder.cb.setChecked(getIsSelected().get(position));

return convertView;

}

public static class ViewHolder {

TextView tv;

CheckBox cb;

}

public static HashMap getIsSelected() {

return isSelected;

}

public static void setIsSelected(HashMap isSelected) {

MulAdapter.isSelected = isSelected;

}

}

以上所述是小编给大家介绍的Android中ListView + CheckBox实现单选、多选效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对编程小技巧网站的支持！

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