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Title: Bug: getting "DecodingException: Unable to decode KnownChildSensitiveDataConsents" · Issue #81 · IABTechLab/iabgpp-java · GitHub

Open Graph Title: Bug: getting "DecodingException: Unable to decode KnownChildSensitiveDataConsents" · Issue #81 · IABTechLab/iabgpp-java

X Title: Bug: getting "DecodingException: Unable to decode KnownChildSensitiveDataConsents" · Issue #81 · IABTechLab/iabgpp-java

Description: I use this library to detect if data-sharing is enabled, by using this: implementation("com.iabgpp:iabgpp-encoder:3.2.3") /** @return returns null if not initialized yet, or initialized and it's ok to share data. * When returned true, it...

Open Graph Description: I use this library to detect if data-sharing is enabled, by using this: implementation("com.iabgpp:iabgpp-encoder:3.2.3") /** @return returns null if not initialized yet, or initialized and it's ok...

X Description: I use this library to detect if data-sharing is enabled, by using this: implementation("com.iabgpp:iabgpp-encoder:3.2.3") /** @return returns null if not initialized yet, or initialized a...

Opengraph URL: https://github.com/IABTechLab/iabgpp-java/issues/81

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Hey, it has json ld scripts: 
{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Bug: getting \"DecodingException: Unable to decode KnownChildSensitiveDataConsents\"","articleBody":"I use this library to detect if data-sharing is enabled, by using this:\n\nimplementation(\"com.iabgpp:iabgpp-encoder:3.2.3\")\n\n```\n    /** @return returns null if not initialized yet, or initialized and it's ok to share data.\n     * When returned true, it means all kinds of data sharing is allowed:SALE_OPT_OUT, SHARING_OPT_OUT, TARGETED_ADVERTISING_OPT_OUT.\n     * Otherwise returns false*/\n    fun isDataShareAllowed(context: Context): Boolean? {\n        val defaultSharedPreferences = PreferenceUtil.getDefaultSharedPreferences(context)\n        val gppString = defaultSharedPreferences.getString(\"IABGPP_HDR_GppString\", null) ?: return null\n        when(gppString){\n            \"DBABL~BVQqAAAAAg\" -> return true\n            \"DBABL~BVQVAAAAAg\" -> return false\n        }\n        CrashlyticsUtil.logException(\"AdConsentUtil isDataShareAllowed unknown gppString detected:$gppString, so using fallback\")\n        val model = GppModel(gppString)\n        val usNatSection1 = model.getSection(UsNat.ID)\n        val fieldsToCheck = arrayOf(UsNatField.SALE_OPT_OUT, UsNatField.SHARING_OPT_OUT, UsNatField.TARGETED_ADVERTISING_OPT_OUT)\n        for (fieldName in fieldsToCheck) {\n            if (usNatSection1.hasField(fieldName)) {\n                val fieldValue = usNatSection1.getFieldValue(fieldName) ?: continue\n                if (fieldValue == 2)\n                    continue\n                return false\n            }\n        }\n        return true\n    }\n```\n\nRecently I got a crash of this sort, reported via Crashlytics, on the line of \"getFieldValue\":\n\n```\n...\n          Caused by com.iab.gpp.encoder.error.DecodingException: Unable to decode KnownChildSensitiveDataConsents\n       at com.iab.gpp.encoder.bitstring.BitStringEncoder.decode(BitStringEncoder.java:49)\n       at com.iab.gpp.encoder.segment.UsNatCoreSegment.decodeSegment(UsNatCoreSegment.java:107)\n       at com.iab.gpp.encoder.segment.UsNatCoreSegment.decodeSegment(UsNatCoreSegment.java:16)\n       at com.iab.gpp.encoder.segment.AbstractLazilyEncodableSegment.getFieldValue(AbstractLazilyEncodableSegment.java:31)\n       at com.iab.gpp.encoder.section.AbstractLazilyEncodableSection.getFieldValue(AbstractLazilyEncodableSection.java:51)\n```\n\n```\n          Caused by com.iab.gpp.encoder.datatype.SubstringException: java.lang.StringIndexOutOfBoundsException: begin 56, end 62, length 60\n       at com.iab.gpp.encoder.datatype.EncodableFixedIntegerList.substring(EncodableFixedIntegerList.java:54)\n       at com.iab.gpp.encoder.bitstring.BitStringEncoder.decode(BitStringEncoder.java:44)\n       at com.iab.gpp.encoder.segment.UsNatCoreSegment.decodeSegment(UsNatCoreSegment.java:107)\n       at com.iab.gpp.encoder.segment.UsNatCoreSegment.decodeSegment(UsNatCoreSegment.java:16)\n       at com.iab.gpp.encoder.segment.AbstractLazilyEncodableSegment.getFieldValue(AbstractLazilyEncodableSegment.java:31)\n       at com.iab.gpp.encoder.section.AbstractLazilyEncodableSection.getFieldValue(AbstractLazilyEncodableSection.java:51)\n```\n\n```\n          Caused by java.lang.StringIndexOutOfBoundsException: begin 56, end 62, length 60\n       at java.lang.String.checkBoundsBeginEnd(String.java:4519)\n       at java.lang.String.substring(String.java:2537)\n       at com.iab.gpp.encoder.datatype.EncodableFixedIntegerList.substring(EncodableFixedIntegerList.java:52)\n       at com.iab.gpp.encoder.bitstring.BitStringEncoder.decode(BitStringEncoder.java:44)\n       at com.iab.gpp.encoder.segment.UsNatCoreSegment.decodeSegment(UsNatCoreSegment.java:107)\n       at com.iab.gpp.encoder.segment.UsNatCoreSegment.decodeSegment(UsNatCoreSegment.java:16)\n       at com.iab.gpp.encoder.segment.AbstractLazilyEncodableSegment.getFieldValue(AbstractLazilyEncodableSegment.java:31)\n       at com.iab.gpp.encoder.section.AbstractLazilyEncodableSection.getFieldValue(AbstractLazilyEncodableSection.java:51)\n```\n\nWhy does it occur?\n\n","author":{"url":"https://github.com/AndroidDeveloperLB","@type":"Person","name":"AndroidDeveloperLB"},"datePublished":"2025-06-25T08:31:32Z","url":"https://github.com/IABTechLab/iabgpp-java/issues/81"}
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