Optimization at the footer when finishLoadmore() is invoked.

Author: lcodecorex

TODO_list.md

@@ -0,0 +1,18 @@
+## 存在的问题
+1. 三星、酷派手机的兼容问题
+2. 依赖太旧的问题->选择去除依赖还是更新依赖  done 以去除依赖
+3. 自动刷新动画生硬  todo 问题待验证
+4. 加载更多闪烁问题 done 做了优化
+5. layout_behavior支持问题
+6. 是否要支持ViewPager回弹问题
+7. 是否要支持所有的View
+8. 测试事件监听冲突问题
+9. 内存溢出问题
+10. 仿QQ视差效果
+
+## 新发现的问题
+1. beizierlayout主动调用刷新时会一片白
+2. BallPulseView引入了内存泄漏
+3. 新的方案，怎么让scroll更平滑；计算Footer降低与TargetView显示距离是否一致：结论，一致，问题在每次滚动的距离上
+4. requestLayout时提示 **improperly called by android.support.v7.widget.AppCompatTextView**
+

library/src/main/java/com/lcodecore/tkrefreshlayout/TwinklingRefreshLayout.java

@@ -803,7 +803,6 @@ public void finishRefreshAfterAnim() {
         public void finishLoadmore() {
             onFinishLoadMore();
             if (isLoadingVisible() && mChildView != null) {
-                ScrollingUtil.scrollAViewBy(mChildView, (int) mBottomHeight);
                 setLoadingMore(false);
                 animProcessor.animBottomBack();
             }

library/src/main/java/com/lcodecore/tkrefreshlayout/processor/AnimProcessor.java

@@ -5,9 +5,11 @@
 import android.animation.AnimatorListenerAdapter;
 import android.animation.ValueAnimator;
 import android.animation.ValueAnimator.AnimatorUpdateListener;
+import android.support.v7.widget.RecyclerView;
 import android.view.animation.DecelerateInterpolator;
 
 import com.lcodecore.tkrefreshlayout.TwinklingRefreshLayout;
+import com.lcodecore.tkrefreshlayout.utils.ScrollingUtil;
 
 import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
@@ -139,7 +141,19 @@ public void onAnimationEnd(Animator animation) {
      */
     public void animBottomBack() {
         isAnimBottomBack = true;
-        animLayoutByTime(getVisibleFootHeight(), 0, animBottomUpListener, new AnimatorListenerAdapter() {
+        animLayoutByTime(getVisibleFootHeight(), 0, new AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+                int dy = getVisibleFootHeight() - (int) animation.getAnimatedValue();
+                //可以让TargetView滚动dy高度，但这样两个方向上滚动感觉画面闪烁，改为dy/2是为了消除闪烁
+                if (dy > 0) {
+                    if (cp.getContent() instanceof RecyclerView)ScrollingUtil.scrollAViewBy(cp.getContent(), dy);
+                    else ScrollingUtil.scrollAViewBy(cp.getContent(), dy/2);
+                }
+                //decorate the AnimatorUpdateListener
+                animBottomUpListener.onAnimationUpdate(animation);
+            }
+        }, new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
                 isAnimBottomBack = false;

library/src/main/java/com/lcodecore/tkrefreshlayout/utils/ScrollingUtil.java

@@ -249,9 +249,9 @@ public static boolean isRecyclerViewToBottom(RecyclerView recyclerView) {
     }
 
     public static void scrollAViewBy(View view, int height) {
-        if (view instanceof RecyclerView) ((RecyclerView) view).smoothScrollBy(0, height);
+        if (view instanceof RecyclerView) ((RecyclerView) view).scrollBy(0, height);
         else if (view instanceof ScrollView) ((ScrollView) view).smoothScrollBy(0, height);
-        else if (view instanceof AbsListView) ((AbsListView) view).smoothScrollBy(height, 150);
+        else if (view instanceof AbsListView) ((AbsListView) view).smoothScrollBy(height, 0);
         else {
             try {
                 Method method = view.getClass().getDeclaredMethod("smoothScrollBy", Integer.class, Integer.class);