How many WindowInsets are there?

Question

I do not understand about WindowInsets rects, because docs says that:

The system window inset represents the area of a full-screen window that is partiall

Answer 1

WindowInsets describes a set of insets for window content. In other words, WindowInsets has one rect of the available area for the app (and has other info like isRound). Available area excludes the rect of StatusBar and NavigationBar.

If you just want to know the height of StatusBar and NavigationBar, check this.

You can get WindowInsets like following. Following example uses WindowInsetsCompat for compatibility.

In your style.xml:

In your AndroidManifest.xml

        ...

In your layout xml: (fitsSystemWindows should be set to get WindowInsets.)

In your Activity (or any place):

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        View container = findViewById(R.id.container);

        ViewCompat.setOnApplyWindowInsetsListener(container, new OnApplyWindowInsetsListener() {
            @Override
            public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {

                //you can do something with insets.
                int statusBar = insets.getSystemWindowInsetTop(); //this is height of statusbar
                int navigationBar = insets.getStableInsetBottom(); //this is height of navigationbar
                Log.d("MainActivity", String.format("%s %s", statusBar, navigationBar));

                ViewCompat.onApplyWindowInsets(v, insets);
                return insets;
            }
        });
    }
}

WindowInsets is like this: