Allow specifying min_sdk_version in dioxus config for Android. (#4549)

* allow specifying min_sdk_version inside dioxus config

* rustfmt

packages/cli/src/build/request.rs

@@ -733,7 +733,12 @@ impl BuildRequest {
 
         // If no custom linker is set, then android falls back to us as the linker
         if custom_linker.is_none() && bundle == BundleFormat::Android {
-            custom_linker = Some(workspace.android_tools()?.android_cc(&triple));
+            let min_sdk_version = config.application.android_min_sdk_version.unwrap_or(24);
+            custom_linker = Some(
+                workspace
+                    .android_tools()?
+                    .android_cc(&triple, min_sdk_version),
+            );
         }
 
         let target_dir = std::env::var("CARGO_TARGET_DIR")
@@ -2568,9 +2573,10 @@ impl BuildRequest {
 
         let mut env_vars: Vec<(Cow<'static, str>, String)> = vec![];
 
+        let min_sdk_version = self.min_sdk_version_or_default();
+
         let tools = self.workspace.android_tools()?;
-        let linker = tools.android_cc(&self.triple);
-        let min_sdk_version = tools.min_sdk_version();
+        let linker = tools.android_cc(&self.triple, min_sdk_version);
         let ar_path = tools.ar_path();
         let target_cc = tools.target_cc();
         let target_cxx = tools.target_cxx();
@@ -4274,7 +4280,10 @@ __wbg_init({{module_or_path: "/{}/{wasm_path}"}}).then((wasm) => {{
     /// will do its best to fill in the missing bits by exploring the sdk structure
     /// IE will attempt to use the Java installed from android studio if possible.
     async fn verify_android_tooling(&self) -> Result<()> {
-        let linker = self.workspace.android_tools()?.android_cc(&self.triple);
+        let linker = self
+            .workspace
+            .android_tools()?
+            .android_cc(&self.triple, self.min_sdk_version_or_default());
 
         tracing::debug!("Verifying android linker: {linker:?}");
 
@@ -4564,6 +4573,14 @@ __wbg_init({{module_or_path: "/{}/{wasm_path}"}}).then((wasm) => {{
             .into()
     }
 
+    /// Returns the min sdk version set in config. If not set 24 is returned as a default.
+    pub(crate) fn min_sdk_version_or_default(&self) -> u32 {
+        self.config
+            .application
+            .android_min_sdk_version
+            .unwrap_or(24)
+    }
+
     pub(crate) async fn start_simulators(&self) -> Result<()> {
         if self.device {
             return Ok(());

packages/cli/src/build/tools.rs

@@ -157,19 +157,15 @@ impl AndroidTools {
     /// "~/Library/Android/sdk/ndk/25.2.9519653/toolchains/llvm/prebuilt/darwin-x86_64/bin/ld"
     ///
     /// However, for our purposes, we only go through the cc driver and not the linker directly.
-    pub(crate) fn android_cc(&self, triple: &Triple) -> PathBuf {
+    pub(crate) fn android_cc(&self, triple: &Triple, sdk_version: u32) -> PathBuf {
         let suffix = if cfg!(target_os = "windows") {
             ".cmd"
         } else {
             ""
         };
 
-        self.android_tools_dir().join(format!(
-            "{}{}-clang{}",
-            triple,
-            self.min_sdk_version(),
-            suffix
-        ))
+        self.android_tools_dir()
+            .join(format!("{}{}-clang{}", triple, sdk_version, suffix))
     }
 
     pub(crate) fn sysroot(&self) -> PathBuf {
@@ -191,11 +187,6 @@ impl AndroidTools {
         self.sdk().join("emulator").join("emulator")
     }
 
-    // todo(jon): this should be configurable
-    pub(crate) fn min_sdk_version(&self) -> u32 {
-        24
-    }
-
     pub(crate) fn clang_folder(&self) -> PathBuf {
         // The clang folder is usually located in the NDK under:
         // "~/Library/Android/sdk/ndk/25.2.9519653/toolchains/llvm/prebuilt/darwin-x86_64/lib/clang/<version>"

packages/cli/src/config/app.rs

@@ -38,4 +38,8 @@ pub(crate) struct ApplicationConfig {
     /// Use this file for the MainActivity.kt associated with the Android app.
     #[serde(default)]
     pub(crate) android_main_activity: Option<PathBuf>,
+
+    /// Specified minimum sdk version for gradle to build the app with.
+    #[serde(default)]
+    pub(crate) android_min_sdk_version: Option<u32>,
 }

packages/cli/src/config/dioxus_config.rs

@@ -22,6 +22,7 @@ impl Default for DioxusConfig {
                 ios_info_plist: None,
                 android_manifest: None,
                 android_main_activity: None,
+                android_min_sdk_version: None,
                 macos_info_plist: None,
                 ios_entitlements: None,
                 macos_entitlements: None,