java - LibGDX GDX-Pay crash -

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i implement gdxpay if want start game comes crash value

10-15 04:40:42.963 1721-1721/com.packagename.mygame.android e/androidruntime: caused by: java.lang.nullpointerexception: attempt read field 'com.badlogic.gdx.pay.purchasemanagerconfig com.packagename.mygame.mygame.purchasemanagerconfig' on null object reference 10-15 04:40:42.963 1721-1721/com.packagename.mygame.android e/androidruntime: @ com.packagename.mygame.android.googleplayresolver.(googleplayresolver.java:17) 10-15 04:40:42.963 1721-1721/com.packagename.mygame.android e/androidruntime: @ com.packagename.mygame.androidlauncher.oncreate(androidlauncher.java:42)

i don't understand it. hope can me.

i found other answer. gdx pay dont work tutorial work good. link


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