[소개][New] 폭죽 좀 더 자연스럽게

- x,y 값으로만 조절하니 # 모양의 지역 구분이 생겨서 360도 어디에도 위치하도록 수정

app/src/main/java/kr/co/zumo/app/lifeplus/view/screen/introduction/guide/GuideLastViewHolder.java

@@ -5,6 +5,7 @@ import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.support.constraint.ConstraintLayout;
+import android.util.Log;
 import android.view.View;
 import android.view.animation.DecelerateInterpolator;
 import android.widget.ImageView;
@@ -101,7 +102,7 @@ public class GuideLastViewHolder extends GuideView {
   @Override
   public void startAnimation() {
     layoutHeader.animate().withLayer().setDuration(800).translationY(0f).start();
-    imageViewObject.animate().withLayer().setDuration(120).translationY(0f).setInterpolator(new DecelerateInterpolator()).start();
+    imageViewObject.animate().withLayer().setDuration(1200).translationY(0f).setInterpolator(new DecelerateInterpolator(1.5f)).start();
   }
 
   @Override
@@ -121,20 +122,12 @@ public class GuideLastViewHolder extends GuideView {
 
   private void startPaperAnimation(ImageView imageViewPaper) {
 
-    int randomX = (int) (Math.random() * 200 - 100);
-    if (randomX > 0) {
-      randomX = randomX + 100;
-    }
-    else {
-      randomX = randomX - 100;
-    }
-    int randomY = (int) (Math.random() * 200 - 100);
-    if (randomY > 0) {
-      randomY = randomY + 100;
-    }
-    else {
-      randomY = randomY - 100;
-    }
+    double theta = Math.random() * (Math.PI * 2);
+    int radius = (int) (Math.random() * 300 + 100);
+    int randomX = (int) (Math.sin(theta) * radius);
+    int randomY = (int) (Math.cos(theta) * radius);
+
+    Log.d("APP# GuideLastViewHolder | startPaperAnimation", "|" + "th: " + theta + "x: " + randomX + ", y: " + randomY);
 
     imageViewPaper.setLayerType(View.LAYER_TYPE_HARDWARE, null);
 
@@ -146,7 +139,7 @@ public class GuideLastViewHolder extends GuideView {
 
     AnimatorSet animatorSet = new AnimatorSet();
     animatorSet.playTogether(paperAlphaAnimation, paperAnimationScaleX, paperAnimationScaleY, paperAnimationTranslationX, paperAnimationTranslationY);
-    animatorSet.setInterpolator(new DecelerateInterpolator());
+    animatorSet.setInterpolator(new DecelerateInterpolator(1.5f));
     animatorSet.setStartDelay(1000);
     animatorSet.setDuration(1500);
     animatorSet.addListener(new AnimatorManager.SimpleListener() {