How to make a clock Android app in Android Studio?

To create a clock app in Android Studio, you can follow these steps:

Open Android Studio and create a new project with an Empty Activity.
In the main activity layout file (activity_main.xml), add a TextView element to display the current time.
In the…


This content originally appeared on DEV Community 👩‍💻👨‍💻 and was authored by Dhruv Joshi

To create a clock app in Android Studio, you can follow these steps:

  • Open Android Studio and create a new project with an Empty Activity.
  • In the main activity layout file (activity_main.xml), add a TextView element to display the current time.
  • In the MainActivity.java file, you can use the Calendar class to get the current time and display it in the TextView. You can do this in the onCreate() method, like this: 
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm:ss", Locale.getDefault());
String currentTime = simpleDateFormat.format(calendar.getTime());
TextView textView = findViewById(R.id.text_view);
textView.setText(currentTime);
  • To update the time in the TextView every second, you can use a Handler and a Runnable to run a piece of code every second. 
final TextView textView = findViewById(R.id.text_view);
final Handler handler = new Handler();
final Runnable runnable = new Runnable() {
    @Override
    public void run() {
        Calendar calendar = Calendar.getInstance();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm:ss", Locale.getDefault());
        String currentTime = simpleDateFormat.format(calendar.getTime());
        textView.setText(currentTime);
        handler.postDelayed(this, 1000);
    }
};
handler.post(runnable);
  • To display the date in addition to the time, you can add another TextView element and update it in the same way as the time TextView.
  • To test your app, click the Run button in the toolbar. Choose a device or emulator to run the app on and click "OK."

I hope this helps! Let me know if you have any other questions. Reach me if you have ideas and want to develop apps.


This content originally appeared on DEV Community 👩‍💻👨‍💻 and was authored by Dhruv Joshi


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