build_android.py

import os, enum, shutil, subprocess

class CpuPlatform(enum.Enum):
  arm = 1
  arm64 = 2
  i386 = 3
  amd64 = 4

class DeviceOrientation(enum.Enum):
  portrait = 1
  landscape = 2
  sensor = 3

def toArchName(x):
  match x:
    case CpuPlatform.arm:
      return "armeabi-v7a"
    case CpuPlatform.arm64:
      return "arm64-v8a"
    case CpuPlatform.i386:
      return "x86"
    case CpuPlatform.amd64:
      return "x86_64"

# Define Android architecture (armeabi-v7a, arm64-v8a, x86, x86-64) and API version
AndroidApiVersion = 29
AndroidCPUs = [CpuPlatform.arm64]

# Required path variables
JavaHome = "/usr/lib/jvm/java-19-openjdk"
AndroidNdk = "/opt/android-ndk"
AndroidHome = "/opt/android-sdk"
AndroidBuildTools = os.path.join(AndroidHome, "build-tools/33.0.1")
AndroidPlatformTools = os.path.join(AndroidHome, "platform-tools")

# Android project configuration variables
ProjectName = "raylib_game"
ProjectLibraryName = "main"
ProjectBuildId = "android"
ProjectBuildPath = ProjectBuildId + "." + ProjectName
ProjectResourcesPath = "src/resources"
ProjectSourceFile = "src/raylib_game.nim"

# Android app configuration variables
AppLabelName = "rGame"
AppCompanyName = "raylib"
AppProductName = "rgame"
AppVersionCode = 1
AppVersionName = "1.0"
AppIconLdpi = "logo/raylib_36x36.png"
AppIconMdpi = "logo/raylib_48x48.png"
AppIconHdpi = "logo/raylib_72x72.png"
AppScreenOrientation = DeviceOrientation.landscape
AppKeystorePass = "raylib"


def setupAndroid():
  # Create required temp directories for APK building
  os.makedirs(os.path.join(ProjectBuildPath, "src", "com", AppCompanyName, AppProductName), exist_ok=True)
  for cpu in AndroidCPUs:
    os.makedirs(os.path.join(ProjectBuildPath, "lib", toArchName(cpu)), exist_ok=True)
  os.makedirs(os.path.join(ProjectBuildPath, "bin"), exist_ok=True)
  os.makedirs(os.path.join(ProjectBuildPath, "res", "drawable-ldpi"), exist_ok=True)
  os.makedirs(os.path.join(ProjectBuildPath, "res", "drawable-mdpi"), exist_ok=True)
  os.makedirs(os.path.join(ProjectBuildPath, "res", "drawable-hdpi"), exist_ok=True)
  os.makedirs(os.path.join(ProjectBuildPath, "res", "values"), exist_ok=True)
  # os.makedirs(os.path.join(ProjectBuildPath, "assets", "resources"), exist_ok=True)
  os.makedirs(os.path.join(ProjectBuildPath, "obj", "screens"), exist_ok=True)
  # Copy project required resources: strings.xml, icon.png, assets
  with open(os.path.join(ProjectBuildPath, "res", "values", "strings.xml"), "w") as f:
    f.write("""<?xml version='1.0' encoding='utf-8'?>\n<resources><string name='app_name'>{}</string></resources>\n""".format(AppLabelName))
  shutil.copy2(AppIconLdpi, os.path.join(ProjectBuildPath, "res", "drawable-ldpi", "icon.png"))
  shutil.copy2(AppIconMdpi, os.path.join(ProjectBuildPath, "res", "drawable-mdpi", "icon.png"))
  shutil.copy2(AppIconHdpi, os.path.join(ProjectBuildPath, "res", "drawable-hdpi", "icon.png"))
  shutil.copytree(ProjectResourcesPath, os.path.join(ProjectBuildPath, "assets", "resources"))
  # Generate NativeLoader.java to load required shared libraries
  with open(os.path.join(ProjectBuildPath, "src", "com", AppCompanyName, AppProductName, "NativeLoader.java"), "w") as f:
    f.write("""package com.{}.{};

public class NativeLoader extends android.app.NativeActivity {{
    static {{
        System.loadLibrary("{}");
    }}
}}
""".format(AppCompanyName, AppProductName, ProjectLibraryName))
  # Generate AndroidManifest.xml with all the required options
  with open(os.path.join(ProjectBuildPath, "AndroidManifest.xml"), "w") as f:
    f.write("""<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.{}.{}"
        android:versionCode="{}" android:versionName="{}" >
    <uses-sdk android:minSdkVersion="{}" />
    <uses-feature android:glEsVersion="0x00020000" android:required="true" />
    <application android:allowBackup="false" android:label="@string/app_name" android:icon="@drawable/icon" >
        <activity android:name="com.{}.{}.NativeLoader"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:screenOrientation="{}" android:launchMode="singleTask"
            android:clearTaskOnLaunch="true">
            <meta-data android:name="android.app.lib_name" android:value="{}" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>
""".format(AppCompanyName, AppProductName, AppVersionCode, AppVersionName, AndroidApiVersion, AppCompanyName, AppProductName, AppScreenOrientation, ProjectLibraryName))

def buildAndroid():
  androidResourcePath = os.path.join(AndroidHome, "platforms/android-{}/android.jar".format(AndroidApiVersion))
  subprocess.run([os.path.join(AndroidBuildTools, "aapt"), "package", "-f", "-m", "-S", os.path.join(ProjectBuildPath, "res"),
                  "-J", os.path.join(ProjectBuildPath, "src"), "-M", os.path.join(ProjectBuildPath, "AndroidManifest.xml"),
                  "-I", androidResourcePath])

  for cpu in AndroidCPUs:
    subprocess.run(["nim", "c", "-d:release", "--os:android", "--cpu:{}".format(cpu), "-d:AndroidApiVersion={}".format(AndroidApiVersion),
                    "-d:AndroidNdk={}".format(AndroidNdk), "-o:{}".format(os.path.join(ProjectBuildPath, "lib", toArchName(cpu), "lib{}.so".format(ProjectLibraryName))),
                    "--nimcache:{}".format(os.path.join("~/.cache/nim", "{}_{}".format(ProjectName, cpu))),
                    ProjectSourceFile])

  subprocess.run([os.path.join(JavaHome, "bin/javac"), "-verbose", "-source", "1.8", "-target", "1.8", "-d", os.path.join(ProjectBuildPath, "obj"),
                  "-bootclasspath", os.path.join(JavaHome, "jre/lib/rt.jar"), "-classpath", "{}:{}".format(androidResourcePath, os.path.join(ProjectBuildPath, "obj")),
                  "-sourcepath", os.path.join(ProjectBuildPath, "src"), os.path.join(ProjectBuildPath, "src/com", AppCompanyName, AppProductName, "R.java"),
                  os.path.join(ProjectBuildPath, "src/com", AppCompanyName, AppProductName, "NativeLoader.java")])

  classes = []
  for f in os.listdir(os.path.join(ProjectBuildPath, "obj/com", AppCompanyName, AppProductName)):
    if f.endswith(".class"):
      classes.append(f)

  subprocess.run([os.path.join(AndroidBuildTools, "d8"), "--release", "--output", os.path.join(ProjectBuildPath, "bin"),
                  " ".join(classes), "--lib", androidResourcePath])

  unsignedApkPath = os.path.join(ProjectBuildPath, "bin", "{}.unsigned.apk".format(ProjectName))
  signed_apk_path = os.path.join(ProjectBuildPath, "bin", "{}.signed.apk".format(ProjectName))
  os.remove(unsignedApkPath) # fixes rebuilding
  os.remove(signedApkPath)
  os.system(f'{AndroidBuildTools}/aapt package -f -M {ProjectBuildPath}/AndroidManifest.xml -S {ProjectBuildPath}/res -A {ProjectBuildPath}/assets -I {androidResourcePath} -F {unsignedApkPath} {ProjectBuildPath}/bin')

setupAndroid()