AndroidListView列表实现倒计时
本文实例为大家分享了Android ListView列表实现倒计时的具体代码，供大家参考，具体内容如下
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效果图：
1. Activity
package com.s296267833.ybs.activity.firstPage.timedown;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import com.s296267833.ybs.R;
import java.util.ArrayList;
import java.util.List;
/**
* ListView列表实现倒计时
* */
public class TimeDownActivity extends AppCompatActivity {
private TimeDownLvAdapter mAdapter;
private ListView mListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_time_down);
mListView= findViewById(R.id.lv_time_down);
setAdapter();
}
/**
* 设置适配器
* */
private void setAdapter() {
mAdapter = new TimeDownLvAdapter(this,getTimerItemList());
mListView.setAdapter(mAdapter);
}
/**
* 设置倒计时的数据
* */
public static List getTimerItemList() {
List lstTimeDownItems = new ArrayList<>();
lstTimeDownItems.add(new TimeDownItem("A千万种心动", System.currentTimeMillis() + 11 * 1000));
lstTimeDownItems.add(new TimeDownItem("B千万种心动", System.currentTimeMillis() + 22 * 1000));
lstTimeDownItems.add(new TimeDownItem("C千万种心动", System.currentTimeMillis() + 26 * 1000));
lstTimeDownItems.add(new TimeDownItem("D千万种心动", System.currentTimeMillis() + 33 * 1000));
lstTimeDownItems.add(new TimeDownItem("E千万种心动", System.currentTimeMillis() + 24 * 1000));
lstTimeDownItems.add(new TimeDownItem("F千万种心动", System.currentTimeMillis() + 98 * 1000));
lstTimeDownItems.add(new TimeDownItem("G千万种心动", System.currentTimeMillis() + 14 * 1000));
lstTimeDownItems.add(new TimeDownItem("H千万种心动", System.currentTimeMillis() + 36 * 1000));
lstTimeDownItems.add(new TimeDownItem("I千万种心动", System.currentTimeMillis() + 58 * 1000));
lstTimeDownItems.add(new TimeDownItem("J千万种心动", System.currentTimeMillis() + 47 * 1000));
lstTimeDownItems.add(new TimeDownItem("K千万种心动", System.currentTimeMillis() + 66 * 1000));
lstTimeDownItems.add(new TimeDownItem("L千万种心动", System.currentTimeMillis() + 55 * 1000));
lstTimeDownItems.add(new TimeDownItem("M千万种心动", System.currentTimeMillis() + 62 * 1000));
lstTimeDownItems.add(new TimeDownItem("N千万种心动", System.currentTimeMillis() + 45 * 1000));
lstTimeDownItems.add(new TimeDownItem("O千万种心动", System.currentTimeMillis() + 14 * 1000));
return lstTimeDownItems;
}
/**
* 清空当前 CountTimeDown 资源
* */
@Override
protected void onDestroy() {
super.onDestroy();
if (mAdapter != null) {
mAdapter.cancelAllTimers();
}
}
} 2. activity_time_down布局
<?xml version="1.0" encoding="utf-8"?>
3. ListView的item类（TimeDownItem）
package com.s296267833.ybs.activity.firstPage.timedown;
/**
* Created by JiYaRuo on 2019/1/9.
* @BeUsedFor 倒计时Lv的Bean类
*/
public class TimeDownItem {
//其他属性
public String name;
//倒计时长，单位毫秒
public long expirationTime;
public TimeDownItem(String name, long expirationTime) {
this.name = name;
this.expirationTime = expirationTime;
}
}4. listview的item布局
<?xml version="1.0" encoding="utf-8"?>
5. ListView的适配器TimeDownLvAdapter
package com.s296267833.ybs.activity.firstPage.timedown;
import android.content.Context;
import android.os.CountDownTimer;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.s296267833.ybs.R;
import com.s296267833.ybs.activity.firstPage.TimeUtils;
import java.util.List;
/**
* Created by JiYaRuo on 2019/1/9.
* @BeUsedFor 列表倒计时listView的适配器
*/
public class TimeDownLvAdapter extends BaseAdapter {
private List mDatas;
private Context mContext;
//用于退出 Activity,避免 Countdown，造成资源浪费。
private SparseArray countDownCounters;
public TimeDownLvAdapter(Context mContext, List mDatas) {
this.mContext = mContext;
this.mDatas = mDatas;
this.countDownCounters = new SparseArray<>();
}
@Override
public int getCount() {
if (mDatas != null && !mDatas.isEmpty()) {
return mDatas.size();
}
return 0;
}
@Override
public Object getItem(int position) {
if (mDatas != null && !mDatas.isEmpty()) {
return mDatas.get(position);
}
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item_common, parent, false);
viewHolder = new ViewHolder();
viewHolder.statusTv = (TextView) convertView.findViewById(R.id.tv_status);
viewHolder.timeTv = (TextView) convertView.findViewById(R.id.tv_time);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
final TimeDownItem data = mDatas.get(position);
viewHolder.statusTv.setText(data.name);
CountDownTimer countDownTimer = countDownCounters.get(viewHolder.timeTv.hashCode());
if (countDownTimer != null) {
//将复用的倒计时清除
countDownTimer.cancel();
}
long timer = data.expirationTime;
timer = timer - System.currentTimeMillis();
//expirationTime 与系统时间做比较，timer 小于零，则此时倒计时已经结束。
if (timer > 0) {
countDownTimer = new CountDownTimer(timer, 1000) {
public void onTick(long millisUntilFinished) {
viewHolder.timeTv.setText(TimeUtils.getCountTimeByLong(millisUntilFinished));
}
public void onFinish() {
viewHolder.timeTv.setText("00:00:00");
viewHolder.statusTv.setText(data.name + ":结束");
}
}.start();
//将此 countDownTimer 放入list.
countDownCounters.put(viewHolder.timeTv.hashCode(), countDownTimer);
} else {
viewHolder.timeTv.setText("00:00:00");
viewHolder.statusTv.setText(data.name + ":结束");
}
return convertView;
}
/**
* ViewHolder内部类
* */
public class ViewHolder {
public TextView statusTv;
public TextView timeTv;
}
/**
* 清空当前 CountTimeDown 资源
*/
public void cancelAllTimers() {
if (countDownCounters == null) {
return;
}
for (int i = 0, length = countDownCounters.size(); i < length; i++) {
CountDownTimer cdt = countDownCounters.get(countDownCounters.keyAt(i));
if (cdt != null) {
cdt.cancel();
}
}
}
} 6. 工具类TimeUtils
package com.s296267833.ybs.activity.firstPage;
/**
* Created by JiYaRuo on 2019/1/9.
* @BeUsedFor 倒计时工具类
*/
public class TimeUtils {
/**
* 毫秒换成00:00:00
* */
public static String getCountTimeByLong(long finishTime) {
int totalTime = (int) (finishTime / 1000);//秒
int hour = 0, minute = 0, second = 0;
if (3600 <= totalTime) {
hour = totalTime / 3600;
totalTime = totalTime - 3600 * hour;
}
if (60 <= totalTime) {
minute = totalTime / 60;
totalTime = totalTime - 60 * minute;
}
if (0 <= totalTime) {
second = totalTime;
}
StringBuilder sb = new StringBuilder();
if (hour < 10) {
sb.append("0").append(hour).append(":");
} else {
sb.append(hour).append(":");
}
if (minute < 10) {
sb.append("0").append(minute).append(":");
} else {
sb.append(minute).append(":");
}
if (second < 10) {
sb.append("0").append(second);
} else {
sb.append(second);
}
return sb.toString();
}
/**
* 将LONG类型的时间戳转换为xx:xx:xx时分秒
* */
public static String formatLongToTimeStr(Long l) {
int hour = 0;
int minute = 0;
int second = 0;
second = l.intValue() ;
if (second > 60) {
minute = second / 60; //取整
second = second % 60; //取余
}
if (minute > 60) {
hour = minute / 60;
minute = minute % 60;
}
String strtime = hour+"："+minute+"："+second;
return strtime;
}
}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创新互联。
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