Add a nice bottom navigation animation

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/controllers/base/bottomnavigation/BottomNavigationController.java

@@ -28,13 +28,13 @@ import android.os.Bundle;
 import android.support.annotation.MenuRes;
 import android.support.annotation.NonNull;
 import android.support.design.widget.BottomNavigationView;
+import android.support.design.widget.CoordinatorLayout;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.LinearLayout;
 
 import com.bluelinelabs.conductor.ChangeHandlerFrameLayout;
 import com.bluelinelabs.conductor.Controller;
@@ -44,6 +44,7 @@ import com.bluelinelabs.conductor.changehandler.FadeChangeHandler;
 import com.nextcloud.talk.R;
 import com.nextcloud.talk.controllers.base.BaseController;
 import com.nextcloud.talk.utils.BottomNavigationUtils;
+import com.nextcloud.talk.utils.animations.BottomNavigationViewBehaviourAnimation;
 import com.nextcloud.talk.utils.bundle.BundleBuilder;
 
 import butterknife.BindView;
@@ -77,7 +78,7 @@ public abstract class BottomNavigationController extends BaseController {
     private static final String KEY_STATE_CURRENTLY_SELECTED_ID = "key_state_currently_selected_id";
 
     @BindView(R.id.bottom_navigation_root)
-    LinearLayout bottomNavigationRoot;
+    CoordinatorLayout bottomNavigationRoot;
 
     @BindView(R.id.navigation)
     BottomNavigationView bottomNavigationView;
@@ -128,6 +129,9 @@ public abstract class BottomNavigationController extends BaseController {
                     navigateTo(item.getItemId(), getControllerFor(item.getItemId()));
                     return true;
                 });
+
+        CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) bottomNavigationView.getLayoutParams();
+        layoutParams.setBehavior(new BottomNavigationViewBehaviourAnimation());
     }
 
     @Override

app/src/main/java/com/nextcloud/talk/utils/animations/BottomNavigationViewBehaviourAnimation.java

@@ -0,0 +1,71 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2016 Srijith Narayanan
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.nextcloud.talk.utils.animations;
+
+import android.support.design.widget.BottomNavigationView;
+import android.support.design.widget.CoordinatorLayout;
+import android.support.v4.view.ViewCompat;
+import android.view.View;
+
+/**
+ * Created by Srijith on 22-12-2016.
+ * Copied for this project from https://github.com/sjthn/BottomNavigationViewBehavior/blob/master/app/src/main/java/com/example/srijith/bottomnavigationviewbehavior/BottomNavigationViewBehavior.java
+ */
+
+public class BottomNavigationViewBehaviourAnimation extends CoordinatorLayout.Behavior<BottomNavigationView> {
+
+    private int height;
+
+    @Override
+    public boolean onLayoutChild(CoordinatorLayout parent, BottomNavigationView child, int layoutDirection) {
+        height = child.getHeight();
+        return super.onLayoutChild(parent, child, layoutDirection);
+    }
+
+    @Override
+    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, BottomNavigationView child, View directTargetChild, View target, int nestedScrollAxes) {
+        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL;
+    }
+
+    @Override
+    public void onNestedScroll(CoordinatorLayout coordinatorLayout, BottomNavigationView child, View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
+        if (dyConsumed > 0) {
+            slideDown(child);
+        } else if (dyConsumed < 0) {
+            slideUp(child);
+        }
+    }
+
+    private void slideUp(BottomNavigationView child) {
+        child.clearAnimation();
+        child.animate().translationY(0).setDuration(200);
+    }
+
+    private void slideDown(BottomNavigationView child) {
+        child.clearAnimation();
+        child.animate().translationY(height).setDuration(200);
+    }
+
+}

app/src/main/res/layout/controller_bottom_navigation.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
+<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/bottom_navigation_root"
@@ -10,9 +10,8 @@
     <com.bluelinelabs.conductor.ChangeHandlerFrameLayout
         android:id="@+id/bottom_navigation_controller_container"
         android:layout_width="match_parent"
-        android:layout_height="0dp"
+        android:layout_height="match_parent"
         android:layout_gravity="top"
-        android:layout_weight="1"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
 
     <android.support.design.widget.BottomNavigationView
@@ -22,4 +21,4 @@
         android:layout_gravity="bottom"
         android:animateLayoutChanges="true"
         android:background="?android:attr/windowBackground"/>
-</LinearLayout>
+</android.support.design.widget.CoordinatorLayout>