I am new to android and i am trying to implement a simple timer.For example i have one button and every time i click this button, a dialog shows up and i can set the time.
This time should then be displayed on the same activity, where the button is.
I am fairly new to android and i have only a button on my main activity.
My Questions now : How can i dynamicly add "countdowns" to my main_activity.Lets say maximum is 3.Is there something like a countdown class already or does TimePicker this for me ?
Below code runs a timer for 30 seconds. If you want the user to choose time, you can use an EditText to get the time from user and put it instead of 30000 in below code.
final CountDownTimer timer;
timer = new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
timerText.setText("seconds remaining: " + String.valueOf(millisUntilFinished / 1000));
}
public void onFinish() {
timerText.setText("done!");
}
};
Related
Hi I'm working on an app with a countdown timer. When the button is clicked the timer starts based on the user inputs into the text field,when I change the value of the text field and a new value for the timer starts, it flashes and shows the previous countdown value and counts both the values down,flashing between the previous and the current countdown value. How do I get the timer to forget the value from before and only use the current timer value.
I tried using the cancel function however that didn't work, I think it's something in my tick function however I'm not sure what it is.
Here is my code:
CountDownTimer mcountDownTimer = new CountDownTimer(getmonTime(), 1000) { // adjust the milli seconds here
public void onTick(long millisUntilFinished) {
long hr1=TimeUnit.MILLISECONDS.toHours( millisUntilFinished);
long sub1=hr1*60;
long min1=TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished);
long sub2=min1*60;
timer.setText(""+String.format("%d hr,%d min, %d sec",
TimeUnit.MILLISECONDS.toHours( millisUntilFinished),
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished)-sub1,
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished)-sub2,
-
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
}
public void onFinish() {
timer.setText("0");
}
};
mcountDownTimer.start();
}
};
You probably don't cancel the previous one.
Save the instance of the CountDownTimer mcountDownTimer (BTW rename it to mCountDownTimer)
And before setting a new one, cancel the old one using:
mCountDownTimer.cancel();
and only then create the new instance.
E.g:
CountDownTimer mCountDownTimer;
#Override
public void onCreate...
...
if (mCountDownTimer != null) mCountDownTimer.cancel();
mCountDownTimer = new CountDownTimer...
I have defined a chronometer;
protected Chronometer chrono;
protected int baseTime;
protected int stopTime;
protected long elapsedTime;
My program asks questions to the user and i want to set a timer based on the user's input. I want a timer which starts at 10 to 0. How can i do that?
Also, I want to show the remaining time on the screen.
Use CountDownTImer instead,
new CountDownTimer(10000, 1000) { //Sets 10 second remaining
public void onTick(long millisUntilFinished) {
mTextView.setText("seconds remaining: " + millisUntilFinished / 1000);
}
public void onFinish() {
mTextView.setText("done!");
}
}.start();
Note : It's not possible to start Chronometer reversely because the Chronometer widget only counts up.
Edit: From API level 24, it is possible to perform count down using chronometer via help of Chronometer#setCountDown(true) method.
In my UI I have a button and a label.
On the button click I want to start a new thread which would update the label text to display the timer information (like 00:00 seconds).
This should be updated every second.
Could someone give a simple solution to this problem please?
Assuming that the information is in the form of a textView (called tv), you would use a countdowntimer:
new CountDownTimer(30000, 1) {
public void onTick(long millisUntilFinished) {
mTextField.setText(/* Whatever you want for each millisecond */);
}
public void onFinish() {
mTextField.setText("00:00");
}
}.start();
the second parameter in the CountDownTimer constructor is the intervals for which onTick, so for this timer, onTick will be called every millisecond.
Any questions?
I want to build an android application, this application allow the users to answer some questions.
For every question, User have to answer it in 360 seconds, so I want to make a digital clock starts from 360secons and then down to 0 seconds
I read that I can't set time on digital clock , is it so?
or I have to use Chronometer?
this is my digital clock
DigitalClock timer;
public void init(){
timer=(DigitalClock)findViewById(R.id.dcTimer);
}
any help appreciated.
Use CountDownTimer instead.
That link also shows you how to update a TextView every 1 second.
Just change new CountDownTimer(30000, 1000) so the first parameter is 360000 instead of 30000 and that will give you a good start to your code.
EDIT : You need to import android.os.CountDownTimer and the code example I referred to is below. Good luck.
new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
}
public void onFinish() {
mTextField.setText("done!");
}
}.start();
In my application one option is there which is used to select the application trigger time that is implemented in RadioButtons like : 10 mins, 20Mins, 30mins and 60mins
after selecting one of them the application starts at that time.. up to this working fine.
But, now I want to display a count down clock after selecting one option from above from that time onwords one clock, I want to display
That will useful to user how much time remaining to trigger the application
if any body knows about this please try to help me
Thanks for reading
Something like this for short counts:
public void timerCountDown(final int secondCount){
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
if (secondCount > 0){
//format time and display
counterBox.setText(Integer.toString((secondCount)));
timerCountDown(secondCount - 1);
}else{
//do after time is up
removeCounterViews();
}
}
}, 1000);
}
But this one is even better and it has two events which update the main UI thread: on tick and on finish, where tick's lenght is defined in the second parameter:
new CountdownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
}
public void onFinish() {
mTextField.setText("done!");
}
}.start();