NullPointerException on {ThemeableBrowser.java:670}

[davidsharp]

I've had a couple of crashes show up in my Fabric panel indicating that users are having trouble with this plugin (version 0.2.12).

The stack trace I'm getting is:

java.lang.NullPointerException
       at com.initialxy.cordova.themeablebrowser.ThemeableBrowser$6$4.onClick(ThemeableBrowser.java:670)
       at android.view.View.performClick(View.java:4633)
       at android.view.View$PerformClick.run(View.java:19274)
       at android.os.Handler.handleCallback(Handler.java:733)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:146)
       at android.app.ActivityThread.main(ActivityThread.java:5593)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:515)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
       at dalvik.system.NativeStart.main(NativeStart.java)

Which as far as I can tell simply indicates that when the close button is being pressed, that inAppWebView.getUrl() is failing for some reason. I've not personally been able to replicate it, but I've had a couple of reports from 4.4.2 (API level 19).

[davidsharp]

I've had a few more reports since on other Android versions (5.0,4.4.4) across various devices and both Intel and ARM architectures, so it's not tied to 4.4.2 or the device.

[josh-m-sharpe]

04-18 16:47:35.468 31181 31273 E PluginManager: Uncaught exception from plugin
04-18 16:47:35.468 31181 31273 E PluginManager: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.apache.cordova.CallbackContext.sendPluginResult(org.apache.cordova.PluginResult)' on a null object reference
04-18 16:47:35.468 31181 31273 E PluginManager:         at com.initialxy.cordova.themeablebrowser.ThemeableBrowser.execute(ThemeableBrowser.java:243)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.apache.cordova.CordovaPlugin.execute(CordovaPlugin.java:117)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.apache.cordova.CordovaPlugin.execute(CordovaPlugin.java:98)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.apache.cordova.PluginManager.exec(PluginManager.java:132)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.apache.cordova.CordovaBridge.jsExec(CordovaBridge.java:57)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.apache.cordova.engine.SystemExposedJsApi.exec(SystemExposedJsApi.java:41)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
04-18 16:47:35.468 31181 31273 E PluginManager:         at org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:41)
04-18 16:47:35.468 31181 31273 E PluginManager:         at android.os.Handler.dispatchMessage(Handler.java:102)
04-18 16:47:35.468 31181 31273 E PluginManager:         at android.os.Looper.loop(Looper.java:154)
04-18 16:47:35.468 31181 31273 E PluginManager:         at android.os.HandlerThread.run(HandlerThread.java:61)
04-18 16:47:35.590 31181 31181 E UncaughtException:
04-18 16:47:35.590 31181 31181 E UncaughtException: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Dialog.show()' on a null object reference
04-18 16:47:35.590 31181 31181 E UncaughtException:     at com.initialxy.cordova.themeablebrowser.ThemeableBrowser$2.run(ThemeableBrowser.java:238)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at android.os.Handler.handleCallback(Handler.java:751)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at android.os.Handler.dispatchMessage(Handler.java:95)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at android.os.Looper.loop(Looper.java:154)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at android.app.ActivityThread.main(ActivityThread.java:6119)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at java.lang.reflect.Method.invoke(Native Method)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
04-18 16:47:35.590 31181 31181 E UncaughtException:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
04-18 16:47:35.754 31181 31237 I CrashlyticsCore: Crashlytics report upload complete: 58F67B4A01D1-0001-79CD-0841D77BEBF3.cls
04-18 16:47:35.836 31181 31181 E AndroidRuntime: FATAL EXCEPTION: main
04-18 16:47:35.836 31181 31181 E AndroidRuntime: Process: com.test.www.development, PID: 31181
04-18 16:47:35.836 31181 31181 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Dialog.show()' on a null object reference
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at com.initialxy.cordova.themeablebrowser.ThemeableBrowser$2.run(ThemeableBrowser.java:238)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at android.os.Handler.handleCallback(Handler.java:751)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:95)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:154)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:6119)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
04-18 16:47:35.836 31181 31181 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
04-18 16:47:35.842  4911 27541 W ActivityManager:   Force finishing activity com.test.www.development/.MainActivity

[santervo]

@davidsharp

I've experienced this exactly same issue.

For me it happens like this:

1. click link to PDF file in web page
2. detect click (using browser.executeScript)
3. prevent navigation, but open file with file-opener plugin instead (starts new intent on top of browser)
4. when return from file-opener and click exit from browser this crash happens

[santervo]

I noticed that this happens every time the underlying CordovaActivity is paused by Android. It could happen for example by just switching to some other app and then coming back again.

[expcapitaldev]

any workaround?