优化bugly空指针问题

app/src/main/java/com/mints/flowbox/keepalive/screen/ScreenObserver.kt

@@ -264,10 +264,6 @@ class ScreenLockerObserver(private val context: Context) {
         if (IntentUtils.isRunningForeground(context) && ForegroundOrBackground.getApp_activity() != null) {
             ForegroundOrBackground.getApp_activity().moveTaskToBack(true)
         }
-//        val activity = context as Activity
-//        if (activity !is ScreenActivity) {
-//            activity.moveTaskToBack(true)
-//        }
 
         try {
             BrandEventLogger.logEventWithBrand(

app/src/main/java/com/mints/flowbox/utils/ForegroundOrBackground.java

@@ -29,7 +29,6 @@ public class ForegroundOrBackground implements Application.ActivityLifecycleCall
     //获取当前最上层的activity
     private static WeakReference<Activity> app_activity;
     private static WeakReference<Activity> main_activity;
-    private static WeakReference<Activity> trans_activity;
     private WeakReference<VersionUpdatePresenter> vupWeakReference;
     private VersionUpdatePresenter vup;
     private WeakReference<Activity> reference;
@@ -62,10 +61,10 @@ public class ForegroundOrBackground implements Application.ActivityLifecycleCall
 
     public static Activity getMain_activity() {
         try {
-            if (main_activity.get() != null) {
+            if (main_activity != null && main_activity.get() != null) {
                 return main_activity.get();
             }
-            return app_activity.get();
+            return null;
         } catch (NullPointerException e) {
             e.printStackTrace();
             return null;
@@ -74,10 +73,10 @@ public class ForegroundOrBackground implements Application.ActivityLifecycleCall
 
     public static Activity getApp_activity() {
         try {
-            if (app_activity.get() != null) {
+            if (app_activity != null && app_activity.get() != null) {
                 return app_activity.get();
             }
-            return main_activity.get();
+            return getMain_activity();
         } catch (NullPointerException e) {
             e.printStackTrace();
             return null;
@@ -136,10 +135,6 @@ public class ForegroundOrBackground implements Application.ActivityLifecycleCall
         if (TextUtils.equals(activity.getClass().getSimpleName(), "MainActivity")) {
             main_activity = new WeakReference<>(activity);
         }
-
-        if (TextUtils.equals(activity.getClass().getSimpleName(), "TransPlaceActivity")) {
-            trans_activity = new WeakReference<>(activity);
-        }
     }
 
     @Override