Android Cheat Sheet

Android Cheat Sheet

ViewBinding

build.gradle

android {
    buildFeatures {
        viewBinding true
    }
}

Activity.java

setContentView((binding = ActivityMainBinding.inflate(getLayoutInflater())).getRoot());

Fragment.java

return (binding = FragmentMainBinding.inflate(inflater, container, false)).getRoot();

Navigation

<androidx.fragment.app.FragmentContainerView
    android:name="androidx.navigation.fragment.NavHostFragment"
    android:id="@+id/nav_host_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:defaultNavHost="true"
    app:navGraph="@navigation/nav_graph" />

NavController (Fragment)

navController = Navigation.findNavController(view);

NavController (Activity)

navController = ((NavHostFragment) getSupportFragmentManager().findFragmentById(R.id.nav_host_fragment)).getNavController();

NavController (DialogFragment)

navController = Navigation.findNavController(requireParentView());