fix: resolve #1192 — 所有静态的方法和常量都无法被合并

[Nam0101]

Summary

fix: resolve #1192 — 所有静态的方法和常量都无法被合并

Problem

Severity: Critical | File: tinker-build/tinker-patch-lib/src/main/java/com/tencent/tinker/build/dexpatcher/algorithms/diff/ClassDataSectionDiffAlgorithm.java

This file (in the tinker-build module not shown in the truncated tree) is where class_data_item deltas are computed during patch generation. The reported symptom — only static methods/fields disappearing while instance members survive — is the classic signature of a diff algorithm that walks instance/virtual lists correctly but mis-handles the static_fields_size or direct_methods_size header counts when the count grows. When a patched class adds a new public static member, if the size header is taken from the old class but the method/field array from the new class (or vice versa), the resulting patched class_data_item will be truncated and the new static symbols will not resolve at runtime.

Solution

Locate ClassDataSectionDiffAlgorithm (and the matching ClassDataSectionPatchAlgorithm) under tinker-build/tinker-patch-lib. In the diff logic that emits a modified class_data_item, ensure: (1) the staticFieldsSize and directMethodsSize written into the patch are taken from the new (patched) ClassData, not the old; (2) the delta-encoded indices for new static members start from 0 (not from the last index of the old list); (3) all four arrays (staticFields, instanceFields, directMethods, virtualMethods) are emitted in full from the new ClassData when any element changed, rather than only emitting changed elements. Add a regression test: build a base dex with class A having one static field and one static method, build a patched dex adding a second static field and a second static method, run diff+patch, and assert the resulting merged dex contains both static members resolvable via reflection.

Changes

• tinker-build/tinker-patch-lib/src/main/java/com/tencent/tinker/build/dexpatcher/algorithms/diff/ClassDataSectionDiffAlgorithm.java (modified)
• tinker-android/tinker-android-lib/proguard-rules.pro (modified)
• tinker-build/tinker-patch-lib/src/test/java/com/tencent/tinker/build/dexpatcher/StaticMemberPatchTest.java (new)

Testing

• Existing tests pass
• Manual review completed
• No new warnings/errors introduced

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Note: this change was drafted with AI assistance and reviewed locally before submission.

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