一元爱购,春归处,卡拉克西军需官
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
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public class singleactivity extends appcompatactivity {
private listview listview;
private arraylist<string> 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<string>();
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<string> list;
private layoutinflater inflater = null;//导入布局
private int temp = -1;
public singleadapter(activity context, arraylist<string> 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<string> 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, 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
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<string> list;
//控制checkbox选中情况
private static hashmap<integer, boolean> isselected;
private layoutinflater inflater = null;//导入布局
public muladapter(context context, arraylist<string> list) {
this.context = context;
this.list = list;
inflater = layoutinflater.from(context);
isselected = new hashmap<integer, boolean>();
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,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();//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<integer, boolean> getisselected() {
return isselected;
}
public static void setisselected(hashmap<integer, boolean> 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
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