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Add assets support #61

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b7d2d2e
add assets support
Blayung Jan 26, 2026
466b0df
added info about assets to the minimal example
Blayung Jan 26, 2026
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3 changes: 3 additions & 0 deletions examples/minimal/build.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@ pub fn build(b: *std.Build) void {
apk.setAndroidManifest(b.path("android/AndroidManifest.xml"));
apk.addResourceDirectory(b.path("android/res"));

// Assets support - put your textures and sounds here, not in the resources:
// apk.addAssetDirectory(b.path("android/assets"));

// Add Java files
// - If you have 'android:hasCode="false"' in your AndroidManifest.xml then no Java files are required
// see: https://developer.android.com/ndk/samples/sample_na
Expand Down
28 changes: 20 additions & 8 deletions src/androidbuild/apk.zig
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Expand Up @@ -48,6 +48,7 @@ android_manifest: ?LazyPath,
artifacts: std.ArrayListUnmanaged(*Step.Compile),
java_files: std.ArrayListUnmanaged(LazyPath),
resources: std.ArrayListUnmanaged(Resource),
assets: std.ArrayListUnmanaged(Resource),

pub const Options = struct {
/// ie. "35.0.0"
Expand Down Expand Up @@ -93,6 +94,7 @@ pub fn create(sdk: *Sdk, options: Options) *Apk {
.artifacts = .empty,
.java_files = .empty,
.resources = .empty,
.assets = .empty
};
return apk;
}
Expand All @@ -117,6 +119,15 @@ pub fn addResourceDirectory(apk: *Apk, dir: LazyPath) void {
}) catch @panic("OOM");
}

pub fn addAssetDirectory(apk: *Apk, dir: LazyPath) void {
const b = apk.b;
apk.assets.append(b.allocator, Resource{
.directory = .{
.source = dir,
},
}) catch @panic("OOM");
}

/// Add artifact to the Android build, this should be a shared library (*.so)
/// that targets x86, x86_64, aarch64, etc
pub fn addArtifact(apk: *Apk, compile: *std.Build.Step.Compile) void {
Expand Down Expand Up @@ -345,14 +356,15 @@ fn doInstallApk(apk: *Apk) std.mem.Allocator.Error!*Step.InstallFile {
aapt2link.addArg("-o");
const resources_apk_file = aapt2link.addOutputFileArg("resources.apk");

// TODO(jae): 2024-09-17
// Add support for asset directories
// Additional directory
// aapt.step.dependOn(&resource_write_files.step);
// for (app_config.asset_directories) |dir| {
// make_unsigned_apk.addArg("-A"); // additional directory in which to find raw asset files
// make_unsigned_apk.addArg(sdk.b.pathFromRoot(dir));
// }
// Add assets
for (apk.assets.items) |asset| {
switch (asset) {
.directory => |asset_dir| {
aapt2link.addArg("-A");
aapt2link.addDirectoryArg(asset_dir.source);
}
}
}

// Add resource files
for (apk.resources.items) |resource| {
Expand Down