Customer reporting issue with NPE on Android push notifications

[ikbalkaya]

Details:
Hi , we also noticed that after the move to official ably plugin, we're getting a surge in the following error for Android:

{code}
Fatal Exception: java.lang.NullPointerException
Attempt to invoke interface method 'void io.flutter.plugin.common.MethodChannel$Result.error(java.lang.String, java.lang.String, java.lang.Object)' on a null object reference
io.ably.flutter.plugin.push.PushActivationEventHandlers$BroadcastReceiver.returnMethodCallResult (PushActivationEventHandlers.java:86)
io.ably.flutter.plugin.push.PushActivationEventHandlers$BroadcastReceiver.onReceive (PushActivationEventHandlers.java:72)
androidx.localbroadcastmanager.content.LocalBroadcastManager.executePendingBroadcasts (LocalBroadcastManager.java:313)
androidx.localbroadcastmanager.content.LocalBroadcastManager$1.handleMessage (LocalBroadcastManager.java:121)
android.os.Handler.dispatchMessage (Handler.java:106)
android.os.Looper.loop (Looper.java:226)
android.app.ActivityThread.main (ActivityThread.java:7191)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:499)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:942)
{code}
Seems to be impacting mainly certain manufacturers/models

{code}
62% Xiaomi
21% OPPO
5% Realme
5% realme
3% vivo
2% samsung
1% HUAWEI
<1% INFINIX MOBILITY LIMITED
<1% asus
<1% Sony
<1% Meizu
{code}
TODO:
Make sure you handle the situation where result is null
Check iOS implementation to see how this case is handled

[ikbalkaya]

This is something to do with most probably where PushActivationEventHandlers is disposed, but the inner broadcast receiver which uses some properties from its upper class is attempting to use those results.