android倒计时功能,android 实现列表倒计时功能 -尊龙游戏旗舰厅官网
android 实现列表倒计时功能
发布时间:2020-08-21 21:47:11
来源:脚本之家
阅读:147
作者:choi晨
单个计时器,然后遍历数据 刷新条目;
两种实现方式:1、handler轮询; 2、子线程睡眠(时间到后 移除列表中的条目会有问题);
代码很简单,没有任何难度,列表使用recyclerview baserecyclerviewadapterhelper实现;
implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'com.github.cymchad:baserecyclerviewadapterhelper:3.0.1'
public class mainactivity extends appcompatactivity {
private recyclerview rv;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
rv = findviewbyid(r.id.rv);
initview();
initdata();
findviewbyid(r.id.btn).setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view view) {
quickadapter.adddata(0,new timebean("附加商品、离活动结束还剩:" , 99));
rv.scrolltoposition(0);
}
});
}
private quickadapter quickadapter;
private void initview() {
quickadapter = new quickadapter(r.layout.item);
rv.setlayoutmanager(new linearlayoutmanager(this));
rv.setadapter(quickadapter);
rv.setitemanimator(null);
countdown();
}
private void initdata() {
list datas = new arraylist<>();
for (int i = 1; i < 10; i ) {
datas.add(new timebean("商品" i "、离活动结束还剩:", (i 5) * i));
}
quickadapter.setnewdata(datas);
}
private class quickadapter extends basequickadapter {
public quickadapter(int layoutresid) {
super(layoutresid);
}
@override
protected void convert(baseviewholder vh, timebean datas) {
vh.settext(r.id.tv, datas.getstr() "");
vh.settext(r.id.tv2, datas.gettime() "s");
}
}
private handler mhandler = new handler();
private runnable runnable;
private void countdown() {
runnable = new runnable() {
@override
public void run() {
for (int i = 0; i < quickadapter.getdata().size(); i ) {
timebean bean = quickadapter.getdata().get(i);
if (bean.gettime() > 0) {
bean.settime(bean.gettime() - 1);
quickadapter.setdata(i, bean);
} else {
quickadapter.remove(i);
}
}
mhandler.postdelayed(runnable, 1000l);
}
};
mhandler.postdelayed(runnable, 1000l);
}
private void countdown2() {
new thread(new runnable() {
@override
public void run() {
while (true){
systemclock.sleep(1000l);
for (int i = 0; i < quickadapter.getdata().size(); i ) {
final timebean bean = quickadapter.getdata().get(i);
final int finali = i;
if (bean.gettime() > 0) {
bean.settime(bean.gettime() - 1);
runonuithread(new runnable() {
@override
public void run() {
quickadapter.setdata(finali, bean);
}
});
} else {
// 当时间是0时 移除条目(子线程加睡眠模式移除条目有问题,原因时数据源未更新)
runonuithread(new runnable() {
@override
public void run() {
quickadapter.remove(finali);
}
});
}
}
}
}
}).start();
}
@override
protected void ondestroy() {
super.ondestroy();
mhandler.removecallbacks(runnable);
mhandler.removecallbacksandmessages(null);
mhandler = null;
}
public class timebean {
public timebean(string str, int time) {
this.str = str;
this.time = time;
}
private string str;
private int time;
}
get 、 set方法就不写了;
布局文件:
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".mainactivity">
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@ id/btn"
android:text="add"
/>
android:id="@ id/rv"
android:layout_width="match_parent"
android:layout_height="match_parent">
//下面是item
android:layout_width="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="horizontal"
android:paddingbottom="@dimen/dp_10"
android:layout_height="60dp">
android:background="#33fb1212"
android:id="@ id/tv"
tools:text="你好啊"
android:gravity="center_vertical"
android:textsize="17dp"
android:paddingleft="15dp"
android:textcolor="#333"
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="match_parent" />
android:background="#33fb1212"
android:id="@ id/tv2"
tools:text="0s"
android:gravity="center_vertical"
android:textsize="17dp"
android:paddingleft="15dp"
android:textcolor="#333"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent" />
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