FloatingActionButton doesn't hide

Question

I am trying to hide my FloatingActionButton fabLocation programmatically with :

fabLocation.setVisibility(View.GONE)

but it do

Answer 1

If you want to show hidden FAB

    <android.support.design.widget.CoordinatorLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/coordinator"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true">


    <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            android:fitsSystemWindows="true">
    ...

    </android.support.design.widget.AppBarLayout>

    ...

    <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:visibility="gone"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:clickable="true"/>

</android.support.design.widget.CoordinatorLayout>

and

    CoordinatorLayout.LayoutParams p = new CoordinatorLayout.LayoutParams(CoordinatorLayout.LayoutParams.WRAP_CONTENT, CoordinatorLayout.LayoutParams.WRAP_CONTENT);
    p.anchorGravity = Gravity.BOTTOM | Gravity.END;
    p.setAnchorId(R.id.appbar);
    p.setMargins(...);
    fab.setLayoutParams(p);
    fab.setVisibility(View.VISIBLE);

Answer 2

I worked around the show()/hide() shortcoming by placing the FAB in or out of the screen using layout margins. example:

CoordinatorLayout.LayoutParams p =
   new CoordinatorLayout.LayoutParams(
      CoordinatorLayout.LayoutParams.WRAP_CONTENT,
      CoordinatorLayout.LayoutParams.WRAP_CONTENT);

p.gravity = Gravity.BOTTOM | Gravity.LEFT;
int fabMargin = (int)res.getDimension(R.dimen.fab_margin);

if( enabled ) {
   p.setMargins(fabMargin,0,0,fabMargin);
}
else {
   p.setMargins(-200,0,0,fabMargin);
}
mFab.setLayoutParams(p);

Answer 3

It is due to the app:layout_anchor attribute. You must get rid of the anchor before changing visibility:

CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
p.setAnchorId(View.NO_ID);
fab.setLayoutParams(p);
fab.setVisibility(View.GONE);

Answer 4

you can do it using this:

fab.setEnabled(false);
fab.setClickable(false);
fab.setAlpha(0.0f);

This is similar behavior as View.Gone

Answer 5

I you use this code:

boolean mFabShouldBeShown;
FloatingActionButton.OnVisibilityChangedListener fabListener = new FloatingActionButton.OnVisibilityChangedListener() {
        @Override
        public void onShown(FloatingActionButton fab) {
            super.onShown(fab);
            if(!mFabShouldBeShown){
                fab.hide();
            }
        }

        @Override
        public void onHidden(FloatingActionButton fab) {
            super.onHidden(fab);
            if(mFabShouldBeShown){
                fab.show();
            }
        }
};

public void methodWhereFabIsHidden() {
    mFabShouldBeShown = false;
    mFloatingActionButton.hide(fabListener);
}

public void methodWhereFabIsShown() {
    mFabShouldBeShown = true;
    mFloatingActionButton.show(fabListener);
}

Answer 6

The most simplistic way to hide and show a floating action button would be to call this in your activity. This will also properly animate your FAB automatically.

Hide:

nameOfYourFAB.Hide();

Show:

nameOfYourFAB.Show();