[BottomNavigationView] shouldn't calculate bottom system insets when keyboard popup in adjustResize

In 1.1.0-alpha09:

Update BottomNavigation to respect bottom system insets (https://github.com/material-components/material-components-android/commit/276bec8385ec877548fc84994c0a016de2428567)

I found that in adjustResize mode, BottomNavigationView will be pushed up aligned with keyboard popped up, and insets.getSystemWindowInsetBottom() will be keyboard hight, causing BottomNavigationView increase padding bottom to double keyboard hight from screen bottom.

[chrisbanes]

Just checked the sample from @b95505017 above. The reason this is happening is because of the following layout (my comments inline).

<!-- The CoordinatorLayout is set to fitsSystemWindows  -->
<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:fitsSystemWindows="true">

    <!-- The direct child of the CoordinatorLayout is NOT set to
         fitsSystemWindows, this means that CoL will automatically
         move this view up to match the insets. This is the first
         application of the insets. -->
    <androidx.constraintlayout.widget.ConstraintLayout>

        <!-- The descendent BottomNavigationView is passed the same insets,
             and pads itself. This is the second application. -->
        <com.google.android.material.bottomnavigation.BottomNavigationView />

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

So how do you fix it? Two options:

1. Move the BottomNavigationView up to be a child of the CoordinatorLayout, and set it to fitsSystemWindows="true"
2. Set the ConstraintLayout to fitsSystemWindows="true" AND set an OnApplyWindowInsetsListener on it to ignore the inset (so that only the BottomNavigation handles it). Slide 143 from this talk goes through a similar example.

[b95505017]

@wcshi Here is the sample of adjustResize

My workaround is extend BottomNavigationView and remove insets listener:

class BottomNavigationViewFix: BottomNavigationView {
    constructor(context: Context?) : super(context)
    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs)
    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(
        context,
        attrs,
        defStyleAttr
    )

    init {
        setOnApplyWindowInsetsListener(null)
    }
}