countdowntimer

问题 After leaving an activity and later returning to it using the onBackPressed() method I am getting a null pointer exception. Activity A links to Activity B. When going back to A i am getting the following errors. 03-19 18:36:19.213: E/AndroidRuntime(441): FATAL EXCEPTION: main 03-19 18:36:19.213: E/AndroidRuntime(441): java.lang.NullPointerException 03-19 18:36:19.213: E/AndroidRuntime(441): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203) 03-19 18:36:19.213: E

问题 I updated android to newer version and suddenly the countdown timer hat was set on my toasts is not working anymore, the toast disappear after little time despite what time I put in my countodown timer. What could have happened? ClickableSpan clickablespan1 = new ClickableSpan() { @Override public void onClick(View widget) { if (toast != null) { toast.cancel(); toast = null; } toast = Toast.makeText(Poeshitesto.this, "touch to continue", Toast.LENGTH_SHORT); toast.show(); new CountDownTimer

问题 in the timer I use how to add a time when a button is pressed? for example, I want millisUntilFinished to increase by 5 seconds when I press a button. I tried with the global variable but it didn't. object :CountDownTimer(10000,1000){ override fun onFinish() { timeText.text = "Left : 0" handler.removeCallbacks(runnable) for (image in imageArray){ image.visibility = View.INVISIBLE } for (add in timeAdd){ add.visibility = View.INVISIBLE } button.visibility = View.VISIBLE } override fun onTick

问题 I am trying to make a program that you enter a number with numberpicker on the first activity and on the second activity there is a countdown timer that uses the number you entered on the first activity to countdown from in minutes(if you enter 10 it countdown 10 minutes). public class timer_2 extends AppCompatActivity { ImageButton imageButton3; private TextView timer_2_up; private TextView timer_2_down; private CountDownTimer timer_2_up_countdowntimer; private CountDownTimer timer_2_down

问题 I am creating an app in which there is a timer on button click the timer starts and I want to continue the timer even I destroy my app, I am using countdown timer method how can I save it's state? I am a noob Please see the code and guide me public class Main2Activity extends AppCompatActivity { private static final long START_TIME_IN_MILLIS = 60000; private TextView mTextViewCountDown; private Button button_claim; private CountDownTimer mCountDownTimer; CharSequence count; private boolean

问题 I have a trivia game that displays 10 questions and they each have a 10 second timer. I have 2 problems that do not function correctly. Firstly, If the timer runs out on a question, it displays the next question but the timer does not reset. The textviews stay at "Time's up!" and "Time Elapsed: 10000" instead of restarting the timer on the new question that is displayed. Lastly, on the Results page the correct score is not displayed in the textview. The percentage textview displays correctly

问题 I'm coding a countdown with jQuery countdown plugin. I only want it to show active ('non-zero') periods, e.g. instead of time left: 0 Days, 0 Hours, 13 Minutes, 20 Seconds it should only show 13 Minutes, 20 Seconds. My code is: $('#countdown').countdown({ expiryUrl:'index.php?show=main', expiryText: 'EXPIRED', until: timeleft, layout:'{d<}{dn} {dl} and {d>}{h<}{hn} {hl}, {h>}{m<}{mnn} {ml}, {m>}{s<}{snn}{sl}{s>}' }); But the problem is that with this code it hides the 'Days' period, but NOT

问题 If understand CountDownTimer correctly, it doesn't run on a separate thread from the activity that started it. So does that mean if I start a CountDownTimer in my main activity, and another piece of code later blocks in the activity, does this mean the CountDownTimer will no longer update as the thread is tied up? and if so, would the CountDownTimer attached to the main activity also stop updating if I launch a second activity? 回答1: If the CountdownTimer is started in the main thread, then

问题 The GrepCode of count down timer shows that it uses a Handler. Is there any specific reason for using handlers? Because handlers are generally used when we are doing some user interaction using threads. But here there are no threads that I can see in Countdown Timer. And also Countdown Timer works when used in the UI thread it self. 回答1: Because handlers are generally used when we are doing some user interaction using threads True. However, "generally" != "always". It so happens that Handler

问题 I'm beginner in Metro Style Developing, I tried to make a small game that's need a timer, countdown from 10 to 0. But at this Visual Studio there is no Timer Component, and DispatcherTimer Not mapped to an xmlns. I Tried to use TimeSpan, that have this field "TicksPerSecond" But this example dosen't help me to make my countdown timer : http://msdn.microsoft.com/en-us/library/system.timespan.tickspersecond.aspx TimeSpan also have this method "FromSeconds", and i Can't also use this one for my