我有两个XML的edittext。在一个EditText中,用户可以将一个数字作为分钟,在另一个EditText中,将一个数字作为秒。单击finish按钮后,秒EditText应该开始倒计时,并每秒钟更新一次文本。
此外,我如何才能保持它的更新,直到它达到零分零秒?
我有两个XML的edittext。在一个EditText中,用户可以将一个数字作为分钟,在另一个EditText中,将一个数字作为秒。单击finish按钮后,秒EditText应该开始倒计时,并每秒钟更新一次文本。
此外,我如何才能保持它的更新,直到它达到零分零秒?
当前回答
倒转倒计时计时器与小时,分钟和秒
public void reverseTimer(int Seconds, final TextView tv) {
new CountDownTimer(Seconds * 1000 + 1000, 1000) {
public void onTick(long millisUntilFinished) {
int seconds = (int) (millisUntilFinished / 1000);
int hours = seconds / (60 * 60);
int tempMint = (seconds - (hours * 60 * 60));
int minutes = tempMint / 60;
seconds = tempMint - (minutes * 60);
tv.setText("TIME : " + String.format("%02d", hours)
+ ":" + String.format("%02d", minutes)
+ ":" + String.format("%02d", seconds));
}
public void onFinish() {
tv.setText("Completed");
}
}.start();
}
其他回答
var futureMinDate = Date()
val sdf = SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH)
try {
futureMinDate = sdf.parse("2019-08-22")
} catch (e: ParseException) {
e.printStackTrace()
}
// Here futureMinDate.time Returns the number of milliseconds since January 1, 1970, 00:00:00 GM
// So we need to subtract the millis from current millis to get actual millis
object : CountDownTimer(futureMinDate.time - System.currentTimeMillis(), 1000) {
override fun onTick(millisUntilFinished: Long) {
val sec = (millisUntilFinished / 1000) % 60
val min = (millisUntilFinished / (1000 * 60)) % 60
val hr = (millisUntilFinished / (1000 * 60 * 60)) % 24
val day = ((millisUntilFinished / (1000 * 60 * 60)) / 24).toInt()
val formattedTimeStr = if (day > 1) "$day days $hr : $min : $sec"
else "$day day $hr : $min : $sec"
tvFlashDealCountDownTime.text = formattedTimeStr
}
override fun onFinish() {
tvFlashDealCountDownTime.text = "Done!"
}
}.start()
传递一个未来日期并将其转换为毫秒。
试试这个方法:
private void startTimer() {
startTimer = new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
long sec = (TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished)));
Log.e(TAG, "onTick: "+sec );
tv_timer.setText(String.format("( %02d SEC )", sec));
if(sec == 1)
{
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
tv_timer.setText("( 00 SEC )");
}
}, 1000);
}
}
public void onFinish() {
tv_timer.setText("Timer finish");
}
}.start();
}
我用kotlin流实现了一个很酷的定时器方法,所以你可以在ViewModel中实现它
var countDownInit = 30
fun countDownTimer() = flow<Int> {
var time = countDownInit
emit(time)
while (true){
time--
delay(1000L)
countDownInit = time
emit(time)
}
}
然后在你的activity或fragment中像这样调用这个函数
lifecycleScope.launch {
lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED){
viewModel.countDownTimer().collect{time->
//and update UI
//and for the finish section you can just use this
this.cancel()
}
}
}
现在在应用程序生命周期的暂停阶段会出现崩溃,你总是有最新的时间
有Rx的纯溶液,有人可能会感兴趣
数字扩展(Double, Float, Long等):
fun Number.countDownTimer(tick: Long = 1, timeUnit: TimeUnit = TimeUnit.SECONDS): Observable<Long> {
val count = this.toLong()
return Observable.interval(tick, timeUnit)
.take(count)
.map { count - it - 1 }
}
使用
60.countDownTimer().subscribe { textView.text = it }
倒转倒计时计时器与小时,分钟和秒
public void reverseTimer(int Seconds, final TextView tv) {
new CountDownTimer(Seconds * 1000 + 1000, 1000) {
public void onTick(long millisUntilFinished) {
int seconds = (int) (millisUntilFinished / 1000);
int hours = seconds / (60 * 60);
int tempMint = (seconds - (hours * 60 * 60));
int minutes = tempMint / 60;
seconds = tempMint - (minutes * 60);
tv.setText("TIME : " + String.format("%02d", hours)
+ ":" + String.format("%02d", minutes)
+ ":" + String.format("%02d", seconds));
}
public void onFinish() {
tv.setText("Completed");
}
}.start();
}