[TrimmableTypeMap] Root manifest-referenced types as unconditional#11016
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simonrozsival
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Mar 25, 2026
| // Multiple managed types can map to the same Java name (aliases). | ||
| var peersByDotName = new Dictionary<string, List<JavaPeerInfo>> (StringComparer.Ordinal); | ||
| foreach (var peer in allPeers) { | ||
| var dotName = peer.JavaName.Replace ('/', '.'); |
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I believe this is not enough - nested types would have $ that also needs to be replaced with . to form valid Java name. Is this the same problem we had elsewhere? Should this be a helper method? Or is there an existing helper method we could use?
simonrozsival
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| var manifestPath = Path.Combine (manifestDir, "AndroidManifest.xml"); | ||
| File.WriteAllText (manifestPath, """ | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
| <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.test"> | ||
| <application> | ||
| <activity android:name="android.app.Activity" /> | ||
| </application> | ||
| </manifest> | ||
| """); |
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Can we do this without writing to a file? Can we somehow change this to use memory stream instead? I believe we could just change GenerateTrimmableTypeMap so it expects the ManifestTemplate to be the memory stream (+ of course use memory stream pooling!)
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When users hand-edit AndroidManifest.xml with component entries that have no corresponding C# attribute (e.g. [Activity]), the referenced types may be trimmed by the linker, causing runtime crashes when Android tries to launch them. This change adds RootManifestReferencedTypes() which parses the manifest template before typemap assembly generation, finds matching peers by their Java name, and marks them as unconditional so the linker preserves them. A warning is logged for manifest-referenced types not found in any scanned assembly (likely framework types). Changes: - JavaPeerInfo.IsUnconditional: changed from init to set - GenerateTrimmableTypeMap: added RootManifestReferencedTypes method - Added two tests for rooting and warning behavior Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Parse the user's AndroidManifest.xml template to find hand-edited component entries (activity, service, receiver, provider) and mark matching Java peers as unconditional so they survive trimming. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Part of #10807
Depends on #10980
Summary
Ensures types declared only in hand-edited
AndroidManifest.xml(no C# component attribute) are marked as unconditional and survive trimming.Problem
A user can hand-edit their manifest with
<activity android:name="com.example.MyLegacyActivity" />where the type has[Register]but no[Activity]attribute. Without this fix, the scanner treats it as a conditional peer (3-argTypeMapAttribute) and the linker may trim it → runtime crash.Changes
JavaPeerInfo.cs: ChangedIsUnconditionalfrominittosetso it can be mutated after scanningGenerateTrimmableTypeMap.cs: AddedRootManifestReferencedTypes()that parsesManifestTemplateXML, extractsandroid:namevalues, and marks matching peers as unconditional