android实现条目倒计时功能

2023-08-13 21:06:05 78

网上对于这样的功能已经是泛滥成河了，但是最近遇到这样的一个需求，还是要值得我们学习一下，并将他记录下来。

布局文件：

Activity界面：

publicclassListCountDownActivityextendsAppCompatActivity{

RecyclerViewmRecyclerView;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_count_down);
initView();

}

privatevoidinitView(){
mRecyclerView=(RecyclerView)findViewById(R.id.rv_list_count_down);
mRecyclerView.setLayoutManager(newLinearLayoutManager(this));
CountDownAdapteradapter=newCountDownAdapter();
mRecyclerView.setAdapter(adapter);
Listlist=newArrayList<>();
for(inti=1;i<101;i++){
list.add(newDataInfo("我是条目"+i,i*100));
}
adapter.setmDatas(list);
}
}

倒计时条目适配器：

/**
*@Date2018/4/26
*@Introduction倒计时条目适配器
*/

publicclassCountDownAdapterextendsRecyclerView.Adapter{

privatefinalStringTAG=CountDownAdapter.class.getSimpleName();

privatefinalintSTOP=0x01;
privatefinalintSTART=0x02;
privatefinalintLOOP=0x03;

privateListmDatas;

publicCountDownAdapter(){
}

publicvoidsetmDatas(ListmDatas){
this.mDatas=mDatas;
notifyDataSetChanged();
}

@Override
publicMyViewHoderonCreateViewHolder(ViewGroupparent,intviewType){
returnnewMyViewHoder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_count_down,parent,false));
}

@Override
publicvoidonBindViewHolder(finalMyViewHoderholder,intposition){
finalDataInfoinfo=mDatas.get(position);
holder.tvName.setText(info.getName());
holder.tvTime.setText(info.getTime()+"");
if(info.isCountDown()){
holder.btnStart.setText("停止");
}else{
holder.btnStart.setText("开始");
}
holder.btnStart.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
Messagemsg=Message.obtain();
if(!info.isCountDown()){
holder.btnStart.setText("停止");
msg.what=START;
}else{
holder.btnStart.setText("开始");
msg.what=STOP;
}
msg.obj=info;
mHandler.sendMessage(msg);
info.setCountDown(!info.isCountDown());
}
});
}

@Override
publicintgetItemCount(){
returnmDatas==null?0:mDatas.size();
}

staticclassMyViewHoderextendsRecyclerView.ViewHolder{

privatefinalTextViewtvName;
privatefinalTextViewtvTime;
privatefinalButtonbtnStart;

publicMyViewHoder(ViewitemView){
super(itemView);
tvName=(TextView)itemView.findViewById(R.id.tv_name_count_down_item);
tvTime=(TextView)itemView.findViewById(R.id.tv_time_count_down_item);
btnStart=(Button)itemView.findViewById(R.id.btn_time_count_down_item);
}
}

privateHandlermHandler=newHandler(){

privateListmCountDownList=newArrayList<>();

@Override
publicvoidhandleMessage(Messagemsg){
setChange(msg);
}

privatesynchronizedvoidsetChange(Messagemsg){
switch(msg.what){
caseSTOP:
DataInfostopInfo=(DataInfo)msg.obj;
Log.e(TAG,"------------stop:"+stopInfo.getName());
mCountDownList.remove(stopInfo);
notifyDataSetChanged();
if(mCountDownList.size()<=0){
mHandler.removeCallbacksAndMessages(null);
}
break;
caseSTART:
DataInfostartInfo=(DataInfo)msg.obj;
Log.e(TAG,"------------start:"+startInfo.getName());
if(startInfo.getTime()>0){
mCountDownList.add(startInfo);
mHandler.sendEmptyMessageDelayed(LOOP,1000);
}
break;
caseLOOP:
if(mCountDownList.size()<=0){
return;
}
for(Iteratoriterator=mCountDownList.iterator();iterator.hasNext();){
DataInfodataInfo=iterator.next();
inttime=dataInfo.getTime();
time--;
dataInfo.setTime(time);
if(time<=0){
iterator.remove();
}
}
notifyDataSetChanged();
mHandler.removeCallbacksAndMessages(null);
mHandler.sendEmptyMessageDelayed(LOOP,1000);
break;
default:
break;
}
}
};
}

JavaBean类

/**
*@Date2018/4/26
*@Introduction倒计时数据实体类
*/

publicclassDataInfo{
privateStringname;
privateinttime;
privatebooleanisCountDown=false;

publicDataInfo(Stringname,inttime){
this.name=name;
this.time=time;
}

publicStringgetName(){
returnname;
}

publicvoidsetName(Stringname){
this.name=name;
}

publicintgetTime(){
returntime;
}

publicvoidsetTime(inttime){
this.time=time;
}

publicbooleanisCountDown(){
returnisCountDown;
}

publicvoidsetCountDown(booleancountDown){
isCountDown=countDown;
}
}

以上就是条目中倒计时的一个小Demo。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

android实现条目倒计时功能

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