[bug] plugin boolean value not parsed

[rupisaini123]

Describe the bug

I have created a plugin and Rust code pass in the boolean value but it is not parsed properly by Kotlin code

Here is the mobile.rs
pub fn fullscreen(&self, payload: FullScreenRequest) -> crate::Result<()> { println!("called fullscreen {:#?}", payload); self.0 .run_mobile_plugin("setFullScreen", payload) .map_err(Into::into) }

confirmed that payload contains the value passed in by JS

10-05 18:35:36.773 26325 26373 I RustStdoutStderr: called fullscreen FullScreenRequest {
10-05 18:35:36.773 26325 26373 I RustStdoutStderr: isFullScreen: true,
10-05 18:35:36.773 26325 26373 I RustStdoutStderr: }

Kotlin code
@InvokeArg
class FullscreenArgs {
var isFullScreen: Boolean = false
}

@command
fun setFullScreen(invoke: Invoke) {
val argsMap: Map<String, Any> = invoke.parseArgs(Map::class.java) as Map<String, Any>
println("Raw JSON: ${argsMap}")
val visible = invoke.parseArgs(FullscreenArgs::class.java)
println("Raw visible: ${visible.toString()}")
if(visible.isFullScreen)
{
println("VISIBLE TRUE")
}
else {
println("VISIBLE FALSE")
}
println("Hello, Kotlin!")
}

confirmed this code is called and isFullScreen is always false, even tho rust is passing in as true
Just to confirm i have logged the raw value using Map
Here is the output for the map
10-05 18:35:36.786 26325 26325 I System.out: Raw JSON: {isFullScreen=true}

and after that i prints
10-05 18:40:42.996 26933 26933 I System.out: VISIBLE FALSE

So not sure why it is not properly mapped

Reproduction

No response

Expected behavior

No response

Full tauri info output

[✔] Environment
    - OS: Mac OS 15.6.1 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ Xcode: 16.4
    ✔ rustc: 1.87.0 (17067e9ac 2025-05-09)
    ✔ cargo: 1.87.0 (99624be96 2025-05-06)
    ✔ rustup: 1.28.2 (e4f3ad6f8 2025-04-28)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 22.14.0
    - pnpm: 9.11.0
    - npm: 10.9.2

[-] Packages
    - tauri 🦀: 2.8.5
    - tauri-build 🦀: 2.4.1
    - wry 🦀: 0.53.3
    - tao 🦀: 0.34.3
    - @tauri-apps/api : 2.8.0
    - @tauri-apps/cli : 2.8.4

[-] Plugins
    - tauri-plugin-os 🦀: 2.3.1
    - @tauri-apps/plugin-os : 2.3.1
    - tauri-plugin-window-state 🦀: 2.4.0
    - @tauri-apps/plugin-window-state : 2.4.0
    - tauri-plugin-log 🦀: 2.6.0, (outdated, latest: 2.7.0)
    - @tauri-apps/plugin-log : not installed!
    - tauri-plugin-fs 🦀: 2.4.1, (outdated, latest: 2.4.2)
    - @tauri-apps/plugin-fs : not installed!
    - tauri-plugin-http 🦀: 2.5.1, (outdated, latest: 2.5.2)
    - @tauri-apps/plugin-http : 2.5.2

[-] App
    - build-type: bundle
    - CSP: script-src 'self' 'unsafe-inline' 'unsafe-eval' tauri: asset: file:; connect-src 'self' https: http: ws: wss: data: tauri:; style-src 'self' 'unsafe-inline' https: http: https://fonts.googleapis.com file:; frame-src 'self' https: http: blob: data:; font-src 'self' https://fonts.gstatic.com data:; media-src 'self' https: http: blob: data: file:; img-src 'self' data: asset: https: http: blob: file: 'unsafe-eval' 'unsafe-inline'; worker-src 'self' blob: data:; default-src 'self' data: tauri: asset: blob: https: http: 'unsafe-eval' 'unsafe-inline' file:
    - frontendDist: ../dist/browser
    - devUrl: http://127.0.0.1:4200/
    - framework: Angular
    - bundler: Webpack

Stack trace

Additional context

No response

[FabianLars]

Can you share the declaration of FullScreenRequest struct in rust as well?

Our geolocation plugin for example also uses a boolean and last i heard it works fine
struct: https://github.com/tauri-apps/plugins-workspace/blob/67a7bf80f8e6f3aec76ebaba0983f0cf0103d3ff/plugins/geolocation/src/models.rs#L31
use in rust: https://github.com/tauri-apps/plugins-workspace/blob/67a7bf80f8e6f3aec76ebaba0983f0cf0103d3ff/plugins/geolocation/src/mobile.rs#L38
kotlin: https://github.com/tauri-apps/plugins-workspace/blob/67a7bf80f8e6f3aec76ebaba0983f0cf0103d3ff/plugins/geolocation/android/src/main/java/GeolocationPlugin.kt#L105

[rupisaini123]

here is the struct:

#[derive(Debug, Clone, Default, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct FullScreenRequest {
pub isFullScreen: bool,
}

[FabianLars]

does it change anything if you do pub is_full_screen: bool ? (without changing anything in js or kotlin)

[rupisaini123]

I updated it and this is what we get at pub fn fullscreen in rust
10-06 10:29:20.735 23990 24042 I RustStdoutStderr: called fullscreen FullScreenRequest {
10-06 10:29:20.736 23990 24042 I RustStdoutStderr: is_full_screen: true,
10-06 10:29:20.736 23990 24042 I RustStdoutStderr: }

but it's still false at kotlin

[lucasfernog]

I've opened a PR to fix it. For now the only thing you can do is rename the field to fullScreen :/