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Sohu Smart Platform Tech Team
Sohu Smart Platform Tech Team
Aug 9, 2025 · Mobile Development

Why FastJson Crashes with Kotlin Data Classes and How to Fix It

This article examines the challenges of using FastJson, FastJson2, Gson, and Kotlinx-serialization to parse Kotlin data classes in Android, explains why crashes occur due to reflection and null-safety issues, and provides step-by-step solutions—including code modifications, ProGuard rules, and library alternatives—to achieve reliable JSON handling.

AndroidFastJSONJSON parsing
0 likes · 20 min read
Why FastJson Crashes with Kotlin Data Classes and How to Fix It
Sohu Tech Products
Sohu Tech Products
Jan 24, 2024 · Mobile Development

How to Fix FastJson Parsing Errors in Kotlin Android Apps

This article analyzes why FastJson, Gson, and Kotlinx‑serialization encounter crashes or incorrect handling when parsing Kotlin data classes in Android, explains the root causes such as missing no‑arg constructors and null‑safety issues, and provides concrete code fixes, ProGuard rules, and a unified wrapper API for reliable JSON processing.

AndroidFastJSONGson
0 likes · 20 min read
How to Fix FastJson Parsing Errors in Kotlin Android Apps