Implement Hierarchical Timing specification for all animators in accordance with Google Material Design motion guidelines

animators/src/main/java/jp/wasabeef/recyclerview/animators/BaseItemAnimator.java

@@ -245,13 +245,22 @@ private void doAnimateAdd(final RecyclerView.ViewHolder holder) {
     return true;
   }
 
+  protected long getRemoveDelay(final RecyclerView.ViewHolder holder) {
+    return Math.abs(holder.getOldPosition() * getRemoveDuration() / 4);
+  }
+
   @Override public boolean animateAdd(final ViewHolder holder) {
     endAnimation(holder);
     preAnimateAdd(holder);
     mPendingAdditions.add(holder);
     return true;
   }
 
+
+  protected long getAddDelay(final RecyclerView.ViewHolder holder) {
+    return Math.abs(holder.getAdapterPosition() * getAddDuration() / 4);
+  }
+
   @Override
   public boolean animateMove(final ViewHolder holder, int fromX, int fromY, int toX, int toY) {
     final View view = holder.itemView;

animators/src/main/java/jp/wasabeef/recyclerview/animators/FadeInAnimator.java

@@ -35,6 +35,7 @@ public FadeInAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -48,6 +49,7 @@ public FadeInAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FadeInDownAnimator.java

@@ -36,6 +36,7 @@ public FadeInDownAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -51,6 +52,7 @@ public FadeInDownAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FadeInLeftAnimator.java

@@ -36,6 +36,7 @@ public FadeInLeftAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -51,6 +52,7 @@ public FadeInLeftAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FadeInRightAnimator.java

@@ -36,6 +36,7 @@ public FadeInRightAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -51,6 +52,7 @@ public FadeInRightAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FadeInUpAnimator.java

@@ -36,6 +36,7 @@ public FadeInUpAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -51,6 +52,7 @@ public FadeInUpAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FlipInBottomXAnimator.java

@@ -35,6 +35,7 @@ public FlipInBottomXAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -48,6 +49,7 @@ public FlipInBottomXAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FlipInLeftYAnimator.java

@@ -35,6 +35,7 @@ public FlipInLeftYAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -48,6 +49,7 @@ public FlipInLeftYAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FlipInRightYAnimator.java

@@ -35,6 +35,7 @@ public FlipInRightYAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -48,6 +49,7 @@ public FlipInRightYAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/FlipInTopXAnimator.java

@@ -35,6 +35,7 @@ public FlipInTopXAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -48,6 +49,7 @@ public FlipInTopXAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/LandingAnimator.java

@@ -37,6 +37,7 @@ public LandingAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -54,6 +55,7 @@ public LandingAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/OvershootInLeftAnimator.java

@@ -37,6 +37,7 @@ public OvershootInLeftAnimator(float mTension) {
         .translationX(-holder.itemView.getRootView().getWidth())
         .setDuration(getRemoveDuration())
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -50,6 +51,7 @@ public OvershootInLeftAnimator(float mTension) {
         .setDuration(getAddDuration())
         .setListener(new DefaultAddVpaListener(holder))
         .setInterpolator(new OvershootInterpolator(mTension))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/OvershootInRightAnimator.java

@@ -37,6 +37,7 @@ public OvershootInRightAnimator(float mTension) {
         .translationX(holder.itemView.getRootView().getWidth())
         .setDuration(getRemoveDuration())
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -50,6 +51,7 @@ public OvershootInRightAnimator(float mTension) {
         .setDuration(getAddDuration())
         .setInterpolator(new OvershootInterpolator(mTension))
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/ScaleInAnimator.java

@@ -36,9 +36,11 @@ public ScaleInAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
+
   @Override protected void preAnimateAddImpl(RecyclerView.ViewHolder holder) {
     ViewCompat.setScaleX(holder.itemView, 0);
     ViewCompat.setScaleY(holder.itemView, 0);
@@ -51,6 +53,7 @@ public ScaleInAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/ScaleInBottomAnimator.java

@@ -42,6 +42,7 @@ public ScaleInBottomAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -60,6 +61,7 @@ public ScaleInBottomAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/ScaleInLeftAnimator.java

@@ -40,6 +40,7 @@ public ScaleInLeftAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -56,6 +57,7 @@ public ScaleInLeftAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/ScaleInRightAnimator.java

@@ -40,6 +40,7 @@ public ScaleInRightAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -56,6 +57,7 @@ public ScaleInRightAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/ScaleInTopAnimator.java

@@ -42,6 +42,7 @@ public ScaleInTopAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -60,6 +61,7 @@ public ScaleInTopAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/SlideInDownAnimator.java

@@ -37,6 +37,7 @@ public SlideInDownAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -52,6 +53,7 @@ public SlideInDownAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/SlideInLeftAnimator.java

@@ -36,6 +36,7 @@ public SlideInLeftAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -49,6 +50,7 @@ public SlideInLeftAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
-  }
+}
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/SlideInRightAnimator.java

@@ -36,6 +36,7 @@ public SlideInRightAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -49,6 +50,7 @@ public SlideInRightAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }

animators/src/main/java/jp/wasabeef/recyclerview/animators/SlideInUpAnimator.java

@@ -37,6 +37,7 @@ public SlideInUpAnimator(Interpolator interpolator) {
         .setDuration(getRemoveDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultRemoveVpaListener(holder))
+        .setStartDelay(getRemoveDelay(holder))
         .start();
   }
 
@@ -52,6 +53,7 @@ public SlideInUpAnimator(Interpolator interpolator) {
         .setDuration(getAddDuration())
         .setInterpolator(mInterpolator)
         .setListener(new DefaultAddVpaListener(holder))
+        .setStartDelay(getAddDelay(holder))
         .start();
   }
 }