前往小程序,Get更优阅读体验!
立即前往
首页
学习
活动
专区
工具
TVP
发布
社区首页 >专栏 >android特卖列表倒计时卡顿问题的解决方法

android特卖列表倒计时卡顿问题的解决方法

作者头像
砸漏
发布2020-10-16 10:57:55
4980
发布2020-10-16 10:57:55
举报
文章被收录于专栏:恩蓝脚本恩蓝脚本恩蓝脚本

在Android的开发中,我们经常遇见倒计时的操作,通常使用Timer和Handler共同操作来完成。当然也可以使用Android系统控件CountDownTimer,这里我们封装成一个控件,也方便大家的使用。

首先上一张效果图吧:

说一下造成卡顿的原因,由于滑动的时候,adapter的getView频繁的创建和销毁,就会出现卡顿和数据错位问题,那么我们每一个item的倒计时就需要单独维护,这里我用的Handler与timer及TimerTask结合的方法,我们知道TimerTask运行在自己子线程,然后通过Timer的schedule()方法实现倒计时功能,最后通过Hander实现View的刷新,其核心代码如下:

public class CountDownView extends LinearLayout {
@BindView(R.id.tv_day)
TextView tvDay;
@BindView(R.id.tv_hour)
TextView tvHour;
@BindView(R.id.tv_minute)
TextView tvMinute;
@BindView(R.id.tv_second)
TextView tvSecond;
@BindView(R.id.day)
TextView day;
@BindView(R.id.hour)
TextView hour;
@BindView(R.id.minute)
TextView minute;
private Context context;
private int viewBg;//倒计时的背景
private int cellBg;//每个倒计时的背景
private int cellTextColor;//文字颜色
private int textColor;//外部:等颜色
private int textSize = 14;//外部文字大小
private int cellTextSize = 12;//cell文字大小
private TimerTask timerTask = null;
private Timer timer = new Timer();
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
countDown();
}
};
public CountDownView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
this.context = context;
}
public CountDownView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
initAttrs(attrs, defStyleAttr);
initView(context);
}
private void initAttrs(AttributeSet attrs, int defStyle) {
TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.CountDownView, defStyle,0);
viewBg = typedArray.getColor(R.styleable.CountDownView_viewBg, Color.parseColor("#FFFFFF"));
cellBg = typedArray.getColor(R.styleable.CountDownView_cellBg, Color.parseColor("#F4F4F4"));
cellTextColor = typedArray.getColor(R.styleable.CountDownView_cellTextColor, Color.parseColor("#646464"));
textColor = typedArray.getColor(R.styleable.CountDownView_TextColor, Color.parseColor("#B3B3B3"));
textSize = (int) typedArray.getDimension(R.styleable.CountDownView_TextSize, UIUtils.dp2px(getContext(), 14));
cellTextSize = (int) typedArray.getDimension(R.styleable.CountDownView_cellTextSize, UIUtils.dp2px(getContext(), 12));
typedArray.recycle();
}
private void initView(Context context) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.layout_countdown_layout, this);
ButterKnife.bind(view);
initProperty();
}
private void initProperty() {
tvDay.setBackgroundColor(cellBg);
tvHour.setBackgroundColor(cellBg);
tvMinute.setBackgroundColor(cellBg);
tvSecond.setBackgroundColor(cellBg);
tvDay.setTextColor(cellTextColor);
tvHour.setTextColor(cellTextColor);
tvMinute.setTextColor(cellTextColor);
tvSecond.setTextColor(cellTextColor);
day.setTextColor(textColor);
hour.setTextColor(textColor);
minute.setTextColor(textColor);
}
public void setLeftTime(long leftTime) {
if (leftTime <= 0) return;
long time = leftTime / 1000;
long day = time / (3600 * 24);
long hours = (time - day * 3600 * 24) / 3600;
long minutes = (time - day * 3600 * 24 - hours * 3600) / 60;
long seconds = time - day * 3600 * 24 - hours * 3600 - minutes * 60;
setTextTime(time);
}
public void start() {
if (timerTask == null) {
timerTask = new TimerTask() {
@Override
public void run() {
handler.sendEmptyMessage(0);
}
};
timer.schedule(timerTask, 1000, 1000);
//  timer.schedule(new TimerTask() {
//  @Override
//  public void run() {
//   handler.sendEmptyMessage(0);
//  }
//  }, 0, 1000);
}
}
public void stop() {
if (timer != null) {
timer.cancel();
timer = null;
}
}
//保证天,时,分,秒都两位显示,不足的补0
private void setTextTime(long time) {
String[] s = TimeUtils.formatTimer(time);
tvDay.setText(s[0]);
tvHour.setText(s[1]);
tvMinute.setText(s[2]);
tvSecond.setText(s[3]);
}
private void countDown() {
if (isCarry4Unit(tvSecond)) {
if (isCarry4Unit(tvMinute)) {
if (isCarry4Unit(tvHour)) {
if (isCarry4Unit(tvDay)) {
stop();
}
}
}
}
}
private boolean isCarry4Unit(TextView tv) {
int time = Integer.valueOf(tv.getText().toString());
time = time - 1;
if (time < 0) {
time = 59;
tv.setText(time + "");
return true;
} else if (time < 10) {
tv.setText("0" + time);
return false;
} else {
tv.setText(time + "");
return false;
}
}
}

另一种写法:

public class CountDownTimerView extends LinearLayout {
private TextView hourView, minuteView, secondView;
private LimitTimer mTimer;
private Handler handler;
public static final int START_LIMIT_TIME_MSG = 0x0111;
public static final int END_LIMIT_TIME_MSG = 0x0112;
private long endTime, leftTime;
private LimitTimeListener listener=null;
public CountDownTimerView(Context context) {
super(context);
initView(context);
}
public CountDownTimerView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
private void initView(Context context) {
setOrientation(HORIZONTAL);
setGravity(Gravity.CENTER_VERTICAL);
inflate(context, R.layout.layout_countdown_layout, this);
hourView = (TextView) findViewById(R.id.tv_hour);
minuteView = (TextView) findViewById(R.id.tv_minute);
secondView = (TextView) findViewById(R.id.tv_second);
}
public long getLeftTime() {
return leftTime;
}
//设置剩余时间
public void initLeftTime(long endTime) {
endTime=endTime*1000;
if (null != mTimer) {
mTimer.cancel();
mTimer = null;
}
this.endTime = endTime;
mTimer = new LimitTimer(endTime, 1000);
mTimer.start();
if (handler != null) {
handler.sendEmptyMessage(START_LIMIT_TIME_MSG);
}
}
/**
* 如果该控件使用在碎片中,返回时,则最好还是要stop
*/
public void stopTimeCount() {
if (null != mTimer) {
mTimer.cancel();
mTimer = null;
}
}
public Handler getHandler() {
return handler;
}
public void setHandler(Handler handler) {
this.handler = handler;
}
private class LimitTimer extends CountDownTimer {
public LimitTimer(long millisInFuture, long countDownInterval) {
super(0 != leftTime ? leftTime : endTime, countDownInterval);
}
@Override
public void onTick(long millisUntilFinished) {
leftTime = millisUntilFinished;
long totalSecond = millisUntilFinished / 1000;
int second = (int) (totalSecond % 60);
int minute = (int) ((totalSecond / 60) % 60);
int hour = (int) ((totalSecond / 3600) % 24);
int day = (int) (totalSecond / (3600 * 24));
formatView(hourView, hour);
formatView(minuteView, minute);
formatView(secondView, second);
}
@Override
public void onFinish() {
String zero = "00";
hourView.setText(zero);
minuteView.setText(zero);
secondView.setText(zero);
if (null != handler) {
handler.sendEmptyMessage(END_LIMIT_TIME_MSG);
}
if (listener!=null){
listener.onTimeOver(true);
}
}
private void formatView(TextView view, int time) {
DecimalFormat df = new DecimalFormat("#00");
view.setText(df.format(time));
}
}
//倒计时结束监听
public void setOnLimitTimeListener(LimitTimeListener listener) {
this.listener = listener;
}
public interface LimitTimeListener {
void onTimeOver(boolean flag);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (handler != null) {
handler.removeMessages(START_LIMIT_TIME_MSG);
}
}
}

涉及到的布局文件

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" 
<TextView
android:id="@+id/tv_hour"
style="@style/style_countdown" / 
<TextView
style="@style/style_wrap_content"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_gravity="center_vertical"
android:text="时"
android:textColor="@color/color_646464" / 
<TextView
android:id="@+id/tv_minute"
style="@style/style_countdown" / 
<TextView
style="@style/style_wrap_content"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_gravity="center_vertical"
android:text="分"
android:textColor="@color/color_646464" / 
<TextView
android:id="@+id/tv_second"
style="@style/style_countdown" / 
<TextView
style="@style/style_wrap_content"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_gravity="center_vertical"
android:text="秒"
android:textColor="@color/color_646464" / 
</LinearLayout 

以上就是本文的全部内容,希望对大家的学习有所帮助。

本文参与 腾讯云自媒体分享计划,分享自作者个人站点/博客。
原始发表:2020-09-11 ,如有侵权请联系 cloudcommunity@tencent.com 删除

本文分享自 作者个人站点/博客 前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

本文参与 腾讯云自媒体分享计划  ,欢迎热爱写作的你一起参与!

评论
登录后参与评论
0 条评论
热度
最新
推荐阅读
领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档