Android 8.1 Launcher3 禁止上滑显示allApps界面

— a/packages/apps/Launcher3/src/com/android/launcher3/dragndrop/DragLayer.java
+++ b/packages/apps/Launcher3/src/com/android/launcher3/dragndrop/DragLayer.java
@@ -116,6 +116,8 @@ public class DragLayer extends InsettableFrameLayout {
private AllAppsTransitionController mAllAppsController;

 private TouchController mActiveController;

•   private Boolean LAUNCHER3_ALL_APPS_PULL_UP = false;
  

  /**
  * Used to create a new DragLayer from XML.
  *
  @@ -243,7 +245,7 @@ public class DragLayer extends InsettableFrameLayout {
  return true;
  }

•    if (mAllAppsController.onControllerInterceptTouchEvent(ev)) {
  

•    if (LAUNCHER3_ALL_APPS_PULL_UP && mAllAppsController.onControllerInterceptTouchEvent(ev)) {
         mActiveController = mAllAppsController;
         return true;
     }