android8.0 launcher改透明

— a/alps/packages/apps/Launcher3/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/alps/packages/apps/Launcher3/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -100,7 +100,8 @@ public class AllAppsTransitionController implements TouchController, VerticalPul
mProgress = 1f;

     mEvaluator = new ArgbEvaluator();

    //mAllAppsBackgroundColor = Themes.getAttrColor(l, android.R.attr.colorPrimary);  //modify
   mAllAppsBackgroundColor = 0;  //modify
 }