Add section on JNI / FFI, Android 16KB memory alignment #3575
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vasfvitor
reviewed
Nov 13, 2025
Comment on lines
391
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| Then in your plugin's Rust code, define the function JNI will look for: | ||
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| ```rust | ||
| #[cfg(target_os = "android")] | ||
| #[no_mangle] | ||
| pub extern "system" fn Java_com_example_HelloWorld_helloWorld( | ||
| mut env: JNIEnv, | ||
| _class: JClass, | ||
| name: JString, | ||
| ) -> jstring { | ||
| log::debug!("Calling JNI Hello World!"); | ||
| let result = format!("Hello, {}!", name); | ||
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| match env.new_string(result) { | ||
| Ok(jstr) => jstr.into_raw(), | ||
| Err(e) => { | ||
| log::error!("Failed to create JString: {}", e); | ||
| std::ptr::null_mut() | ||
| } | ||
| } | ||
| } | ||
| ``` | ||
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Contributor
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does Java_com_example_HelloWorld_helloWorld has any correlation with the app name, if so, could you add an aside or note about it. Same about the ios section.
I see patterns but I really don't know if is for illustration or code convention/requirement
thanks
Author
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Good note, updated to clarify naming conventions. Thanks for the feedback!
FabianLars
reviewed
Nov 13, 2025
…uri-docs into bclarke/mobile-plugin-tips
…uri-docs into bclarke/mobile-plugin-tips
vasfvitor
approved these changes
Nov 15, 2025
FabianLars
approved these changes
Nov 15, 2025
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Description
Hi, thanks for this fantastic project! I could only find a few code examples to explain how to call Rust directly from Swift / Kotlin, so I added a brief section to the mobile plugin development page. Also, I added an explanation on how to configure Android builds to be compatible with the new 16KB memory alignment requirements. All feedback welcome!