Added and tested android logger (#388)

android/demo-app/src/main/java/com/stadiamaps/ferrostar/MainActivity.kt

@@ -10,6 +10,7 @@ import androidx.compose.material3.Surface
 import com.stadiamaps.ferrostar.core.AndroidTtsStatusListener
 import com.stadiamaps.ferrostar.ui.theme.FerrostarTheme
 import java.util.Locale
+import uniffi.ferrostar.createFerrostarLogger
 
 class MainActivity : ComponentActivity(), AndroidTtsStatusListener {
   companion object {
@@ -44,6 +45,9 @@ class MainActivity : ComponentActivity(), AndroidTtsStatusListener {
     //    AppModule.locationProvider.lastLocation = initialSimulatedLocation
     //    AppModule.locationProvider.warpFactor = 2u
 
+    // Setup the global Ferrostar logger
+    createFerrostarLogger()
+
     // Edge to edge (this will be default in Android 15)
     // See https://developer.android.com/codelabs/edge-to-edge#0
     // How to: https://developer.android.com/develop/ui/compose/layouts/insets#insets-setup

common/ferrostar/Cargo.toml

@@ -43,6 +43,10 @@ wasm-bindgen = { version = "0.2.93", optional = true }
 web-time = { version = "1.1.0", features = ["serde"], optional = true }
 itertools = "0.13.0"
 tsify = { version = "0.4.5", default-features = false, features = ["js"] }
+log = "0.4.22"
+
+[target.'cfg(target_os = "android")'.dependencies]
+android_logger = { version = "0.14.1" }
 
 [build-dependencies]
 uniffi = { workspace = true, features = ["build"] }

common/ferrostar/src/lib.rs

@@ -23,13 +23,37 @@
 #[cfg(feature = "alloc")]
 extern crate alloc;
 
+#[cfg(target_os = "android")]
+use android_logger::{Config, FilterBuilder};
+
 pub mod algorithms;
 pub mod deviation_detection;
 pub mod models;
 pub mod navigation_controller;
 pub mod routing_adapters;
 pub mod simulation;
 
+#[cfg(target_os = "android")]
+fn init_logger() {
+    android_logger::init_once(
+        Config::default()
+            .with_max_level(log::LevelFilter::Trace)
+            .with_tag("ferrostar.core"),
+    );
+    log::info!("Ferrostar android logger initialized");
+}
+
+#[cfg(not(target_os = "android"))]
+fn init_logger() {
+    // Add fallback logging initialization for non-Android platforms
+}
+
+#[cfg(feature = "uniffi")]
+#[uniffi::export]
+pub fn create_ferrostar_logger() {
+    init_logger();
+}
+
 #[cfg(feature = "uniffi")]
 mod uniffi_deps {
     pub use crate::models::Route;