countdown timer milliseconds android studio github

In the Minimum API level dropdown menu, select API level 21 or higher.

Note that, in the Language dropdown menu, Kotlin is the only available option because Jetpack Compose works only with classes written in Kotlin.

Set the Name, Package name, and Save location as you normally would.

In the Configure your project window, do the following:.

After Installing, Create A New Project, In the Select a Project Template window, select Empty Compose Activity and click Next.

It is recommended to download Latest Release of Android Studio Canary to use with Jetpack Compose.

At the time of writing this post, Jetpack Compose is currently in beta, and all features are not fully stable.

override fun onCreate(savedInstanceState: Bundle?) Inside of onCreate(), add onClickListeners to both the start and reset buttons. private lateinit var binding: ActivityMainBinding private var timeLeftInMillis = 0L private var countDownTimer: CountDownTimer? = null private var timerIsRunning = false private var remainingTimeInMillis = 300000L private var endTime = 0L I will try my best to explain what each function does and at the very end, I will paste all the code in MainActivity.kt.įirst off, create these variables in MainActivity. Run the app and it should look something like this.įrom this point forward, everything will be done on MainActivity.kt. Add a textview and 2 buttons on your activity_main.xml file.Create an empty project in Android Studio and enable view binding.A link to this project’s GitHub repository is also at the end. Scroll down to the end to see a video demo of what the app does. We will be using shared preferences to make this work.

You will be able to start, stop and reset the timer. I will be demonstrating how to create a count down timer that works if you exit the app and come back after a period of time.

Countdown timer milliseconds android studio github