Use CMake for Android build and add GitHub CI

.github/workflows/android.yml

@@ -0,0 +1,33 @@
+name: Android CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up build environment
+        run: echo "y" | sudo ${ANDROID_HOME}/tools/bin/sdkmanager --install "ndk;20.0.5594570"
+
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - run: git fetch origin +refs/tags/*:refs/tags/*
+
+      - uses: actions/cache@v1
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Gradle
+        working-directory: shell/android-studio
+        run: ./gradlew assembleDreamcastDebug --parallel
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: reicast-dreamcast-debug.apk
+          path: shell/android-studio/reicast/build/outputs/apk/dreamcast/debug/reicast-dreamcast-debug.apk

shell/android-studio/reicast/build.gradle

@@ -35,8 +35,14 @@ android {
         versionName getVersionName()
         vectorDrawables.useSupportLibrary = true
 
+        externalNativeBuild {
+            cmake {
+                arguments '-DANDROID_ARM_MODE=arm'
+            }
+        }
+
         ndk {
-            moduleName "dc"
+            moduleName 'flycast'
             abiFilters 'armeabi-v7a', 'arm64-v8a'
         }
     }
@@ -72,13 +78,14 @@ android {
     flavorDimensions "systemtype"
     productFlavors {
         dreamcast {
-            externalNativeBuild { ndkBuild { arguments ("-j" + Runtime.runtime.availableProcessors()) } }
+
         }
     }
 
     externalNativeBuild {
-        ndkBuild {
+        cmake {
-            path 'src/main/jni/Android.mk'
+            version '3.10.2+'
+            path '../../../CMakeLists.txt'
         }
     }
 

shell/android-studio/reicast/src/main/java/com/reicast/emulator/emu/AudioBackend.java

@@ -9,7 +9,7 @@ import android.util.Log;
 import static android.media.AudioTrack.STATE_INITIALIZED;
 
 public final class AudioBackend {
-    static { System.loadLibrary("dc"); }
+    static { System.loadLibrary("flycast"); }
 
     private AudioTrack audioTrack;
     private long writePosition;

shell/android-studio/reicast/src/main/java/com/reicast/emulator/emu/JNIdc.java

@@ -7,7 +7,7 @@ import com.reicast.emulator.periph.SipEmulator;
 
 public final class JNIdc
 {
-	static { System.loadLibrary("dc"); }
+	static { System.loadLibrary("flycast"); }
 
 	public static native String initEnvironment(Emulator emulator, String homeDirectory);
 	public static native void setExternalStorageDirectories(Object[] pathList);

shell/android-studio/reicast/src/main/java/com/reicast/emulator/periph/InputDeviceManager.java

@@ -10,7 +10,7 @@ import com.reicast.emulator.Emulator;
 public final class InputDeviceManager implements InputManager.InputDeviceListener {
     public static final int VIRTUAL_GAMEPAD_ID = 0x12345678;
 
-    static { System.loadLibrary("dc"); }
+    static { System.loadLibrary("flycast"); }
     private static final InputDeviceManager INSTANCE = new InputDeviceManager();
     private InputManager inputManager;
     private int maple_port = 0;

shell/android-studio/reicast/src/main/jni/Android.mk

@@ -90,7 +90,7 @@ LOCAL_CPP_FEATURES :=
 # LOCAL_SHARED_LIBRARIES:= libcutils libutils
 LOCAL_PRELINK_MODULE  := false
 
-LOCAL_MODULE	:= dc
+LOCAL_MODULE	:= flycast
 LOCAL_DISABLE_FORMAT_STRING_CHECKS=true
 LOCAL_ASFLAGS := -fPIC -fvisibility=hidden
 LOCAL_LDLIBS	:= -llog -lEGL -lz -landroid