setOnApplyWindowInsetsListener never called

I faced the same issue.

If your root view is ConstraintLayout and contains android:fitsSystemWindows="true" attr, the view consumed onApplyWindowInsets callbacks. So if you set onApplyWindowInsets on child views, they never get onApplyWindowInsets callbacks.

Or check your parent views consume the callback.

This is what I observed; in other words, your experience might be different.

[Layout for Activity]
<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:id="@+id/coordinatorLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"    <--
    tools:context=".MyAppActivity">

    ...

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>

Notice android:fitsSystemWindows="true" in the outer most layout. As long as we have it, setOnApplyWindowInsetsListener() does get called.

class MyActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        ...

        ViewCompat.setOnApplyWindowInsetsListener(fab) { view, insets ->
            ...
            insets
        }
    }

Alternatively, if you are going for the "full screen", meaning you want your layout to extend to the status bar and the navigation bar, you can do something like the following.

override fun onCreate(savedInstanceState: Bundle?) {
    ...

    WindowCompat.setDecorFitsSystemWindows(window, false)    <--

    ViewCompat.setOnApplyWindowInsetsListener(fab) { view, insets ->
        ...
        insets
    }
}

The same idea is applicable when you are using a Fragment, as long as the Activity (that contains the Fragment) has either fitsSystemWindows in the outer most layout or you set your Activity as full screen.

I have faced with this problem when I've used CollapsingToolbarLayout, problem is that CollapsingToolbarLayout not invoking insets listener, if you have CollapsingToolbarLayout, then right after this component all other view insets wouldn't be triggered. If so, then remove listener from CollapsingToolbarLayout by calling

ViewCompat.setOnApplyWindowInsetsListener(collapsingToolbarLayout, null)

If you don't CollapsingToolbarLayout, then some other view is blocking insets from passing from view to view.

Or you have already consumed them, I guess you didn't do it)

There is also bug with CollapsingToolbarLayout, it prevents siblings to receive insets, you can see it in issues github link. One of the solutions is to putAppbarLayout below in xml other views for them to receive insets.

My solution is to call it on navBarOverlay.rootView.

I faced similar issue on API 30. For setOnApplyWindowInsetsListener() to work you have to make sure that your activity is in full-screen mode. You can use below method to do so

WindowCompat.setDecorFitsSystemWindows(activity.window, false) //this is backward compatible version

Also make sure you are not using below method anywhere to set UI flags

View.setSystemUiVisibility(int visibility)

I had this problem on android 7.1. But on android 11 it worked correctly. Just create a class:

import android.content.Context
import android.util.AttributeSet
import androidx.core.view.ViewCompat
import com.google.android.material.appbar.CollapsingToolbarLayout

class InsetsCollapsingToolbarLayout @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyle: Int = 0
) : CollapsingToolbarLayout(context, attrs, defStyle) {

    init {
        ViewCompat.setOnApplyWindowInsetsListener(this, null)
    }

}

And use everywhere InsetsCollapsingToolbarLayout instead of CollapsingToolbarLayout

I've had to (and I think I am expected to) explicitly call requestApplyInsets() at some appropriate time to make the listener get hit.

Check this article for some possible tips: https://medium.com/androiddevelopers/windowinsets-listeners-to-layouts-8f9ccc8fa4d1

In my app, it gets called once and not every time I wanted to. Therefore, in that one time it gets called, I saved the widnowInsets to a global variable to use it throughout the app.

I used the following solution using this answer:

ViewCompat.setOnApplyWindowInsetsListener(
        findViewById(android.R.id.content)
    ) { _: View?, insets: WindowInsetsCompat ->
        navigationBarHeight = insets.systemWindowInsetBottom
        insets
    }

putting ViewCompat.setOnApplyWindowInsetsListener into onResume worked for me with constraintLayout.

@Override
public void onResume() {
    super.onResume();
    ViewCompat.setOnApplyWindowInsetsListener(requireActivity().getWindow().getDecorView(), (v, insets) -> {
            boolean imeVisible = insets.isVisible(WindowInsetsCompat.Type.ime());
            int imeHeight = insets.getInsets(WindowInsetsCompat.Type.ime()).bottom;
            return insets;
        });
} 

I used following solution in my project and it's works like a charm.

val decorView: View = requireActivity().window.decorView
val rootView = decorView.findViewById<View>(android.R.id.content) as ViewGroup
ViewCompat.setOnApplyWindowInsetsListener(rootView) { _, insets ->
    val isKeyboardVisible = isKeyboardVisible(insets)
    Timber.d("isKeyboardVisible: $isKeyboardVisible")

    // Do something with isKeyboardVisible

    insets
}

private fun isKeyboardVisible(insets: WindowInsetsCompat): Boolean {
    val systemWindow = insets.systemWindowInsets
    val rootStable = insets.stableInsets
    if (systemWindow.bottom > rootStable.bottom) {
        // This handles the adjustResize case on < API 30, since
        // systemWindow.bottom is probably going to be the IME
        return true
    }
    return false
}

Use setWindowInsetsAnimationCallback instead of setOnApplyWindowInsetsListener in Android API > 30