nix: get gradle build working

agdk-eframe/.envrc

@@ -0,0 +1 @@
+use nix

agdk-eframe/.gitignore

@@ -1,5 +1,6 @@
 *.iml
 .gradle
+.direnv
 /local.properties
 /.idea
 .DS_Store

agdk-eframe/app/build.gradle

@@ -4,6 +4,7 @@ plugins {
 
 android {
     ndkVersion "25.2.9519653"
+    buildToolsVersion "34.0.0"
     compileSdk 31
 
     defaultConfig {

agdk-eframe/shell.nix

@@ -0,0 +1,42 @@
+{ pkgs ? import <nixpkgs> {}, use_android ? true }:
+with pkgs;
+let
+  x11libs = lib.makeLibraryPath [ xorg.libX11 xorg.libXcursor xorg.libXrandr xorg.libXi libglvnd vulkan-loader vulkan-validation-layers libxkbcommon ];
+  #ndk-version = "24.0.8215888";
+
+  ndk-version = "25.2.9519653";
+  #build-tools-version = "30.0.3";
+  build-tools-version = "34.0.0";
+  #ndk-version = "26.1.10909125";
+  androidComposition = androidenv.composeAndroidPackages {
+    includeNDK = true;
+    ndkVersions = [ ndk-version ];
+    buildToolsVersions = [ build-tools-version ];
+    #platformVersions = [ "28" "29" "30" "31" ];
+    platformVersions = [ "31" ];
+    useGoogleAPIs = false;
+    #useGoogleTVAddOns = false;
+    #includeExtras = [
+    #  "extras;google;gcm"
+    #];
+  };
+  androidsdk = androidComposition.androidsdk;
+  android-home = "${androidsdk}/libexec/android-sdk";
+  ndk-home = "${android-home}/ndk/${ndk-version}";
+in
+
+mkShell ({
+  nativeBuildInputs = [
+    cargo-udeps cargo-edit cargo-watch rustup rustfmt libiconv pkg-config cmake fontconfig
+    brotli wabt gdb heaptrack
+
+    heaptrack
+
+  ] ++ pkgs.lib.optional use_android [ jre openssl libiconv androidsdk cargo-apk ] ;
+
+  LD_LIBRARY_PATH="${x11libs}";
+} // (if !use_android then {} else {
+  ANDROID_HOME = android-home;
+  NDK_HOME = ndk-home;
+  GRADLE_OPTS = "-Dorg.gradle.project.android.aapt2FromMavenOverride=${android-home}/build-tools/${build-tools-version}/aapt2";
+}))