Add support for any FloatingActionButton library

ahbottomnavigation/src/main/java/com/aurelhubert/ahbottomnavigation/AHBottomNavigation.java

@@ -16,7 +16,6 @@
 import android.support.annotation.ColorRes;
 import android.support.annotation.DrawableRes;
 import android.support.design.widget.CoordinatorLayout;
-import android.support.design.widget.FloatingActionButton;
 import android.support.v4.content.ContextCompat;
 import android.support.v4.view.ViewCompat;
 import android.support.v4.view.animation.LinearOutSlowInInterpolator;
@@ -1246,11 +1245,14 @@ public void setBehaviorTranslationEnabled(boolean behaviorTranslationEnabled) {
 
 	/**
 	 * Manage the floating action button behavior with AHBottomNavigation
+	 * Method could also be used with custom libraries for FAB such as Clans/FloatingActionButton.
+	 * Factor added to adjust the Y based on the FAB used.
+	 * TIP: Factor of 1.48f works well for Clans/FloatingActionButton
 	 * @param fab Floating Action Button
 	 */
-	public void manageFloatingActionButtonBehavior(FloatingActionButton fab) {
+	public <T extends View> void manageFloatingActionButtonBehavior(T fab, float factor) {
 		if (fab.getParent() instanceof CoordinatorLayout) {
-			AHBottomNavigationFABBehavior fabBehavior = new AHBottomNavigationFABBehavior(navigationBarHeight);
+			AHBottomNavigationFABBehavior fabBehavior = new AHBottomNavigationFABBehavior(navigationBarHeight, factor);
 			((CoordinatorLayout.LayoutParams) fab.getLayoutParams())
 					.setBehavior(fabBehavior);
 		}

ahbottomnavigation/src/main/java/com/aurelhubert/ahbottomnavigation/AHBottomNavigationFABBehavior.java

@@ -1,25 +1,26 @@
 package com.aurelhubert.ahbottomnavigation;
 
 import android.support.design.widget.CoordinatorLayout;
-import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.Snackbar;
 import android.view.View;
 import android.view.ViewGroup;
 
 /**
  *
  */
-public class AHBottomNavigationFABBehavior extends CoordinatorLayout.Behavior<FloatingActionButton> {
+public class AHBottomNavigationFABBehavior<T extends View> extends CoordinatorLayout.Behavior<T> {
 
 	private int navigationBarHeight = 0;
 	private long lastSnackbarUpdate = 0;
+	private float factor = 1.0f;
 
-	public AHBottomNavigationFABBehavior(int navigationBarHeight) {
+	public AHBottomNavigationFABBehavior(int navigationBarHeight, float factor) {
 		this.navigationBarHeight = navigationBarHeight;
+		this.factor = (factor == 0.0f) ? 1.0f : factor;
 	}
 
 	@Override
-	public boolean layoutDependsOn(CoordinatorLayout parent, FloatingActionButton child, View dependency) {
+	public boolean layoutDependsOn(CoordinatorLayout parent, T child, View dependency) {
 		if (dependency != null && dependency instanceof Snackbar.SnackbarLayout) {
 			return true;
 		} else if (dependency != null && dependency instanceof AHBottomNavigation) {
@@ -29,29 +30,30 @@ public boolean layoutDependsOn(CoordinatorLayout parent, FloatingActionButton ch
 	}
 
 	@Override
-	public boolean onDependentViewChanged(CoordinatorLayout parent, FloatingActionButton child, View dependency) {
+	public boolean onDependentViewChanged(CoordinatorLayout parent, T child, View dependency) {
 		updateFloatingActionButton(child, dependency);
 		return super.onDependentViewChanged(parent, child, dependency);
 	}
 
 	/**
 	 * Update floating action button bottom margin
 	 */
-	private void updateFloatingActionButton(FloatingActionButton child, View dependency) {
-		if (child != null && dependency != null && dependency instanceof Snackbar.SnackbarLayout) {
+	private void updateFloatingActionButton(T child, View dependency) {
+		if(child == null || dependency == null) {
+			return;
+		}
+		if (dependency instanceof Snackbar.SnackbarLayout) {
 			lastSnackbarUpdate = System.currentTimeMillis();
-			ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) child.getLayoutParams();
-			int fabDefaultBottomMargin = p.bottomMargin;
-			child.setY(dependency.getY() - fabDefaultBottomMargin);
-		} else if (child != null && dependency != null && dependency instanceof AHBottomNavigation) {
+		} else if (dependency instanceof AHBottomNavigation) {
 			// Hack to avoid moving the FAB when the AHBottomNavigation is moving (showing or hiding animation)
 			if (System.currentTimeMillis() - lastSnackbarUpdate < 30) {
 				return;
 			}
-			ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) child.getLayoutParams();
-			int fabDefaultBottomMargin = p.bottomMargin;
-			child.setY(dependency.getY() - fabDefaultBottomMargin);
 		}
+
+		ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) child.getLayoutParams();
+		int fabDefaultBottomMargin = p.bottomMargin;
+		child.setY((dependency.getY()/factor) - fabDefaultBottomMargin);
 	}
 
 }

demo/src/main/java/com/aurelhubert/ahbottomnavigation/demo/DemoActivity.java

@@ -83,7 +83,8 @@ private void initUI() {
 			bottomNavigation.addItems(bottomNavigationItems);
 		}
 
-		bottomNavigation.manageFloatingActionButtonBehavior(floatingActionButton);
+		// For Android support library FAB factor of 1.0f is good
+		bottomNavigation.manageFloatingActionButtonBehavior(floatingActionButton, 1.0f);
 		bottomNavigation.setTranslucentNavigationEnabled(true);
 
 		bottomNavigation.setOnTabSelectedListener(new AHBottomNavigation.OnTabSelectedListener() {