how to do a calendar feature in app android studio code example

Example 1: android studio include gson in app

// Module level build.gradle
dependencies {
     implementation 'com.google.code.gson:gson:2.8.5' // Old 2.8.2
}

Example 2: how to open activity in android studio

Intent intent = new Intent(this, DisplayMessageActivity.class);
        intent.putExtra(key:,value:);
        startActivity(intent);

Example 3: how to get app package and app activity in android

adb shell dumpsys window windows | grep -E 'mCurrentFocus'

Example 4: add an internet use in manifest android studio

// Insert the permission below before "<application" tag opening
// It has to be inserted inside the AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />