Add an animation to hide the chatBox on swipe

Author: kunall17

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -85,6 +85,7 @@
 import com.zulip.android.R;
 import com.zulip.android.models.Stream;
 import com.zulip.android.networking.AsyncSend;
+import com.zulip.android.util.AnimationHelper;
 import com.zulip.android.util.SwipeRemoveLinearLayout;
 import com.zulip.android.util.ZLog;
 import com.zulip.android.ZulipApp;
@@ -162,8 +163,8 @@ public void onReceive(Context contenxt, Intent intent) {
     };
 
     @Override
-    public void removeChatBox() {
-        chatBox.setVisibility(View.GONE);
+    public void removeChatBox(boolean animToRight) {
+        AnimationHelper.hideViewX(chatBox, animToRight);
     }
 
     // Intent Extra constants
@@ -1263,7 +1264,7 @@ private boolean prepareSearchView(Menu menu) {
             final android.support.v7.widget.SearchView searchView = (android.support.v7.widget.SearchView) MenuItemCompat.getActionView(mSearchMenuItem);
             searchView.setSearchableInfo(searchManager.getSearchableInfo(new ComponentName(getApplicationContext(), ZulipActivity.class)));
             searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
-            ((EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text)).setHintTextColor(ContextCompat.getColor(this,R.color.colorTextPrimary));
+            ((EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text)).setHintTextColor(ContextCompat.getColor(this, R.color.colorTextPrimary));
             searchView.setOnQueryTextListener(new android.support.v7.widget.SearchView.OnQueryTextListener() {
                 @Override
                 public boolean onQueryTextSubmit(String s) {

app/src/main/java/com/zulip/android/util/AnimationHelper.java

@@ -1,6 +1,7 @@
 package com.zulip.android.util;
 
 import android.animation.Animator;
+import android.support.design.widget.AppBarLayout;
 import android.support.v4.view.animation.FastOutSlowInInterpolator;
 import android.view.View;
 import android.view.ViewPropertyAnimator;
@@ -65,4 +66,33 @@ public void onAnimationRepeat(Animator animator) {
         });
         slideOutAnimator.start();
     }
+
+    public static void hideViewX(final View view, boolean animToRight) {
+        ViewPropertyAnimator animator = view.animate()
+                .translationX((animToRight) ? view.getWidth() : view.getWidth() * -1)
+                .setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR)
+                .setDuration(200);
+
+        animator.setListener(new Animator.AnimatorListener() {
+            @Override
+            public void onAnimationStart(Animator animator) {
+            }
+
+            @Override
+            public void onAnimationEnd(Animator animator) {
+                view.setVisibility(View.GONE);
+                view.setX(0);
+            }
+
+            @Override
+            public void onAnimationCancel(Animator animator) {
+            }
+
+            @Override
+            public void onAnimationRepeat(Animator animator) {
+            }
+        });
+        animator.start();
+    }
+
 }

app/src/main/java/com/zulip/android/util/SwipeRemoveLinearLayout.java

@@ -43,7 +43,7 @@ public boolean onInterceptTouchEvent(MotionEvent ev) {
                 x2 = ev.getX();
                 float deltaX = x2 - x1;
                 if (Math.abs(deltaX) > MIN_DISTANCE) {
-                    leftToRightSwipeListen.removeChatBox();
+                    leftToRightSwipeListen.removeChatBox((deltaX > 0));
                     return true;
                 }
                 break;
@@ -52,7 +52,7 @@ public boolean onInterceptTouchEvent(MotionEvent ev) {
     }
 
     public interface leftToRightSwipeListener {
-        void removeChatBox();
+        void removeChatBox(boolean animToRight);
     }
 
     public void registerToSwipeEvents(leftToRightSwipeListener listener) {