Merge pull request tiann#16 from wojiaowanghaha/fix-intercept-activity

修复intercept_activity demo 8.0 hook失败问题

Author: tiann

intercept-activity/src/main/java/com/weishu/intercept_activity/app/hook/AMSHookHelper.java

@@ -56,9 +56,15 @@ public static void hookActivityManagerNative() throws ClassNotFoundException,
         //            39}
         //        40
 
-        Class<?> activityManagerNativeClass = Class.forName("android.app.ActivityManagerNative");
-
-        Field gDefaultField = activityManagerNativeClass.getDeclaredField("gDefault");
+         Field gDefaultField =null;
+        if (Build.VERSION.SDK_INT >= 26) {
+            Class<?> activityManager = Class.forName("android.app.ActivityManager");
+             gDefaultField = activityManager.getDeclaredField("IActivityManagerSingleton");
+        }else{
+            Class<?> activityManagerNativeClass = Class.forName("android.app.ActivityManagerNative");
+             gDefaultField = activityManagerNativeClass.getDeclaredField("gDefault");
+        }
+        gDefaultField.setAccessible(true);
         gDefaultField.setAccessible(true);
 
         Object gDefault = gDefaultField.get(null);