init

.gitignore

@@ -0,0 +1 @@
+build

AndroidManifest.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest 
+    xmlns:android="http://schemas.android.com/apk/res/android" 
+    android:compileSdkVersion="34"
+	package="com.example.shadowing">
+    <uses-sdk android:minSdkVersion="28" android:targetSdkVersion="34"/>
+
+    <application
+        android:supportsRtl="true"
+            android:label="Shadowing">
+        <activity android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+              <action android:name="android.intent.action.MAIN" />
+              <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
+

build.sh

@@ -0,0 +1,12 @@
+javac -classpath ~/Android/Sdk/platforms/android-34/android.jar java/classes/com/example/shadowing/MainActivity.java -d build/
+d8 --classpath ~/Android/Sdk/platforms/android-34/android.jar build/com/example/shadowing/MainActivity.class --output build/
+mkdir -p build/apk_files/
+cp build/classes.dex build/apk_files/
+~/Android/Sdk/build-tools/34.0.0/aapt package -v -f -M AndroidManifest.xml -I ~/Android/Sdk/platforms/android-34/android.jar -F build/app.apk build/apk_files/
+keytool -genkeypair -validity 1000 -dname "CN=SomeKey,O=SomeOne,C=FR" -keystore build/ToyKey.keystore -storepass 'P@ssw0rd!' -keypass 'P@ssw0rd!' -alias SignKey -keyalg RSA -v
+~/Android/Sdk/build-tools/34.0.0/zipalign -f 4 build/app.apk build/app.aligned.apk
+~/Android/Sdk/build-tools/34.0.0/apksigner sign -ks ToyKey.keystore --v2-signing-enabled true --in app.aligned.apk --out app.signed.apk --ks-pass 'pass:P@ssw0rd!'
+
+~/Android/Sdk/platform-tools/adb install app.signed.apk
+~/Android/Sdk/platform-tools/adb shell am start -n com.example.shadowing/.MainActivity
+~/Android/Sdk/platform-tools/adb uninstall com.example.shadowing

flake.nix

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+{
+  description = "APKs demonstrating class shadowing.";
+  inputs = {
+    nixpkgs.url = github:nixos/nixpkgs/nixos-unstable;
+    flake-utils.url = github:numtide/flake-utils;
+  };
+
+  outputs = { self, nixpkgs, flake-utils }: 
+    flake-utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in rec {
+
+
+      devShells.default = pkgs.mkShell {
+          packages = [ pkgs.hello ];
+      };
+    })
+  ;
+}

java/classes/com/example/shadowing/MainActivity.java

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+package com.example.shadowing;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+//import android.widget.RelativeLayout;
+//import android.view.ViewGroup;
+//import android.view.View;
+
+public class MainActivity extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        LinearLayout ll = new LinearLayout(this);
+        ll.setOrientation(LinearLayout.VERTICAL);
+        ll.generateViewId();
+        setContentView(ll);
+        TextView tw = new TextView(this);
+        tw.setText("Hello Void!");
+        tw.generateViewId();
+        ll.addView(tw);
+    }
+}