can't run in android platform, report null pointer error, how to fix it

[zhouzh1800]

09-18 11:09:58.346 16305-16305/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.star.webviewtest, PID: 16305
java.lang.Error: FATAL EXCEPTION [main]
Unity version : 5.6.1p4
Device model : samsung SM-N920S
Device fingerprint: samsung/noblelteskt/noblelteskt:7.0/NRD90M/N920SKSU2DQL1:user/release-keys

                                               Caused by: java.lang.RuntimeException: Unable to resume activity {com.star.webviewtest/net.gree.unitywebview.CUnityPlayerActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.unity3d.player.k.b(boolean)' on a null object reference
                                                   at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3791)
                                                   at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3832)
                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2994)
                                                   at android.app.ActivityThread.-wrap14(ActivityThread.java)
                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1631)
                                                   at android.os.Handler.dispatchMessage(Handler.java:102)
                                                   at android.os.Looper.loop(Looper.java:154)
                                                   at android.app.ActivityThread.main(ActivityThread.java:6682)
                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
                                                Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.unity3d.player.k.b(boolean)' on a null object reference
                                                   at com.unity3d.player.UnityPlayer.resume(Unknown Source)
                                                   at com.unity3d.player.UnityPlayerActivity.onResume(Unknown Source)
                                                   at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1277)
                                                   at android.app.Activity.performResume(Activity.java:7088)
                                                   at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3768)
                                                   at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3832) 
                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2994) 
                                                   at android.app.ActivityThread.-wrap14(ActivityThread.java) 
                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1631) 
                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                   at android.os.Looper.loop(Looper.java:154) 
                                                   at android.app.ActivityThread.main(ActivityThread.java:6682) 
                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520) 
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410) 

[KojiNakamaru]

As 5.6.1p4 should have the fix and should not need net.gree.unitywebview.CUnityPlayerActivity, could you please adjust UnityWebViewPostprocessBuild.cs as below.

--- UnityWebViewPostprocessBuild.cs.orig	2018-09-18 13:31:47.000000000 +0900
+++ UnityWebViewPostprocessBuild.cs	2018-09-18 13:32:07.000000000 +0900
@@ -69,14 +69,14 @@
                 doc.Save(manifest);
                 Debug.LogError("adjusted AndroidManifest.xml about android:hardwareAccelerated. Please rebuild the app.");
             }
-#if UNITY_5_6_0 || UNITY_5_6_1
-            if (activity != null
-                && activity.GetAttribute("android:name") == "com.unity3d.player.UnityPlayerActivity") {
-                activity.SetAttribute("name", "http://schemas.android.com/apk/res/android", "net.gree.unitywebview.CUnityPlayerActivity");
-                doc.Save(manifest);
-                Debug.LogError("adjusted AndroidManifest.xml about android:name. Please rebuild the app.");
-            }
-#endif
+// #if UNITY_5_6_0 || UNITY_5_6_1
+//             if (activity != null
+//                 && activity.GetAttribute("android:name") == "com.unity3d.player.UnityPlayerActivity") {
+//                 activity.SetAttribute("name", "http://schemas.android.com/apk/res/android", "net.gree.unitywebview.CUnityPlayerActivity");
+//                 doc.Save(manifest);
+//                 Debug.LogError("adjusted AndroidManifest.xml about android:name. Please rebuild the app.");
+//             }
+// #endif
         }
 #endif
         if (buildTarget == BuildTarget.iOS) {

cf. #212 (comment)
cf. https://unity3d.com/unity/qa/patch-releases?version=5.6&page=2

Patch 5.6.1p4
Fixes
(916119) - Android: Fixed a regression where Banner Ads are invisible, but still clickable.

[zhouzh1800]

yeah, thank you, it work