Add Interpolator for SimpleDialogCurtain

app/src/main/java/com/hippo/scene/SimpleDialogCurtain.java

@@ -20,8 +20,11 @@ import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.support.annotation.NonNull;
+import android.support.v4.view.animation.FastOutLinearInInterpolator;
+import android.support.v4.view.animation.LinearOutSlowInInterpolator;
 import android.view.View;
 import android.view.ViewTreeObserver;
+import android.view.animation.Interpolator;
 
 import com.hippo.animation.ArgbEvaluator;
 import com.hippo.animation.SimpleAnimatorListener;
@@ -35,6 +38,9 @@ public class SimpleDialogCurtain extends Curtain {
 
     private static long ANIMATE_TIME = 300L;
 
+    private final static Interpolator FAST_OUT_LINEAR_IN_INTERPOLATOR = new FastOutLinearInInterpolator();
+    private final static Interpolator LINEAR_OUT_SLOW_IN_INTERPOLATOR = new LinearOutSlowInInterpolator();
+
     private int mStartX;
     private int mStartY;
 
@@ -63,6 +69,7 @@ public class SimpleDialogCurtain extends Curtain {
         ObjectAnimator colorAnim = ObjectAnimator.ofInt(enter, "backgroundColor", bgColor);
         colorAnim.setEvaluator(ArgbEvaluator.getInstance());
         colorAnim.setDuration(ANIMATE_TIME);
+        colorAnim.setInterpolator(LINEAR_OUT_SLOW_IN_INTERPOLATOR);
         animatorCollection.add(colorAnim);
 
         final View mFrame = enterDialog.getFrame();
@@ -104,6 +111,7 @@ public class SimpleDialogCurtain extends Curtain {
                 PropertyValuesHolder bottomPvh = PropertyValuesHolder.ofInt("drawBottom", startBottom, endBottom);
                 ObjectAnimator anim = ObjectAnimator.ofPropertyValuesHolder(mFrame, leftPvh, topPvh, rightPvh, bottomPvh);
                 anim.setDuration(ANIMATE_TIME);
+                anim.setInterpolator(LINEAR_OUT_SLOW_IN_INTERPOLATOR);
 
                 animatorCollection.add(anim);
 
@@ -139,6 +147,7 @@ public class SimpleDialogCurtain extends Curtain {
         colorAnim.setEvaluator(ArgbEvaluator.getInstance());
         colorAnim.setDuration(ANIMATE_TIME);
         animatorCollection.add(colorAnim);
+        colorAnim.setInterpolator(FAST_OUT_LINEAR_IN_INTERPOLATOR);
 
         final View mFrame = exitDialog.getFrame();
         AssertUtils.assertNotNull("Frame view must not be null.", mFrame);
@@ -171,6 +180,7 @@ public class SimpleDialogCurtain extends Curtain {
         PropertyValuesHolder bottomPvh = PropertyValuesHolder.ofInt("drawBottom", startBottom, endBottom);
         ObjectAnimator anim = ObjectAnimator.ofPropertyValuesHolder(mFrame, leftPvh, topPvh, rightPvh, bottomPvh);
         anim.setDuration(ANIMATE_TIME);
+        anim.setInterpolator(FAST_OUT_LINEAR_IN_INTERPOLATOR);
 
         animatorCollection.add(anim);