Fix IllegalStateException in getPurchaseHistory for Android

[mgonzalezc]

The method getPurchaseHistory raises an IllegalStateException: Reply already submitted in Android
I am not sure if this is the best way to fix the issue because it makes the function slower, but at least the exception isn't thrown anymore

java.lang.IllegalStateException: Reply already submitted
at io.flutter.embedding.engine.dart.DartMessenger$Reply.reply(DartMessenger.java:164)
at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler$1.success(MethodChannel.java:238)
at com.dooboolab.flutterinapppurchase.MethodResultWrapper$1.run(MethodResultWrapper.java:27)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7838)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

[codecov]

Codecov Report

Merging #336 (7ecc5aa) into master (5988a56) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #336   +/-   ##
=======================================
  Coverage   45.97%   45.97%           
=======================================
  Files           3        3           
  Lines         435      435           
=======================================
  Hits          200      200           
  Misses        235      235           

Impacted Files	Coverage Δ
lib/flutter_inapp_purchase.dart	54.43% <100.00%> (ø)

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[4F2E4A2E]

I am getting this error as well. v5.1.2.
[✓] Flutter (Channel stable, 2.5.3, on macOS 12.0.1 21A559 darwin-x64, locale en-AT)

[4F2E4A2E]

@mgonzalezc thy very much for this pr, but I am still getting the same error with this commit.
I am trying you branch out by installing it via git:

flutter_inapp_purchase:
    git:
      url: git@github.com:mgonzalezc/flutter_inapp_purchase.git
      ref: fix/mindapps_fix

.pub-cache reveal the right dependency being loaded:

D/AndroidRuntime(21874): Shutting down VM
E/AndroidRuntime(21874): FATAL EXCEPTION: main
E/AndroidRuntime(21874): Process: ai.lobi.app, PID: 21874
E/AndroidRuntime(21874): java.lang.IllegalStateException: Reply already submitted
E/AndroidRuntime(21874): 	at io.flutter.embedding.engine.dart.DartMessenger$Reply.reply(DartMessenger.java:164)
E/AndroidRuntime(21874): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler$1.success(MethodChannel.java:238)
E/AndroidRuntime(21874): 	at com.dooboolab.flutterinapppurchase.MethodResultWrapper$1.run(MethodResultWrapper.java:27)
E/AndroidRuntime(21874): 	at android.os.Handler.handleCallback(Handler.java:938)
E/AndroidRuntime(21874): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(21874): 	at android.os.Looper.loop(Looper.java:223)
E/AndroidRuntime(21874): 	at android.app.ActivityThread.main(ActivityThread.java:7656)
E/AndroidRuntime(21874): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(21874): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/AndroidRuntime(21874): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

[mgonzalezc]

Hello!

Sorry about that! To be honest, this was a quick fix I made to have the plugin working with my own code. However, I think the issue is deeper and may need a bit more thinking. Now, I am thinking you could get the same error if you call getPurchaseHistory twice synchronously. There might be other cases when it fails as well

[dineshinworld]

When I delete handler, the package doesn't respond. The future is waiting and waiting and doesn't respond. This was the same problem I got in in_app_purchase.

[mgonzalezc]

Sorry, @dineshinworld I was trying to test a few things and completely forgot that I had this PR opened in the same branch... I have reverted it now. It worked for me without the handlers though.

[github-actions]

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