fix update float view crash

Author: changelcai

matrix/matrix-android/gradle.properties

@@ -14,5 +14,5 @@ org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryErro
 # org.gradle.parallel=true
 #Tue Jun 20 10:24:33 CST 2017
 
-VERSION_NAME_PREFIX=0.5.2.38
+VERSION_NAME_PREFIX=0.5.2.39
 VERSION_NAME_SUFFIX=

matrix/matrix-android/matrix-trace-canary/src/main/java/com/tencent/matrix/trace/view/FrameDecorator.java

@@ -106,6 +106,9 @@ public boolean onTouch(final View v, MotionEvent event) {
                         ((ValueAnimator) animator).addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                             @Override
                             public void onAnimationUpdate(ValueAnimator animation) {
+                                if(!isShowing){
+                                    return;
+                                }
                                 int value = (int) animation.getAnimatedValue("trans");
                                 layoutParam.x = value;
                                 windowManager.updateViewLayout(v, layoutParam);