// java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1001, result=0, data=null} to activity {org.coolreader/org.coolreader.CoolReader}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference
// at android.app.ActivityThread.deliverResults(ActivityThread.java:3699)
// at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
// at android.app.ActivityThread.-wrap16(ActivityThread.java)
// at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
// at android.os.Handler.dispatchMessage(Handler.java:102)
// at android.os.Looper.loop(Looper.java:148)
// at android.app.ActivityThread.main(ActivityThread.java:5417)
// at java.lang.reflect.Method.invoke(Native Method)
// at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
// at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
// Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference
// at org.coolreader.donations.CRDonationService.onActivityResult(CRDonationService.java:199)
// at org.coolreader.CoolReader.onActivityResult(CoolReader.java:887)
// at android.app.Activity.dispatchActivityResult(Activity.java:6456)
// at android.app.ActivityThread.deliverResults(ActivityThread.java:3695)
// ... 9 more