Skulls! A simple Columns-like strategy game developed in Golang with the Ebiten library (for Android)

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  The game was developed as a POC to experience creating a simple game with Go/deploying it to Android
  


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  The Ebiten library for Golang was used to create the game
  


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  go-inovation was used as a guide for the ebitenmobile .aar binding
  


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  All development/debugging was done with the gomobile tool and adb
  


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  Android Studio should be downloaded/installed; the AVD emulators are free and convenient
  


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  I use the AVD emulators that are installable with Android Studio and stored in
  $ANDROID_HOME/emulator/emulator
  


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  It may be helpful to store an alias in your profile to open an emulator via a simple command:
  alias pixel4=’$ANDROID_HOME/emulator/emulator -avd “Pixel_4_API_30”‘
  


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  Font used for text: RADIOLAND.TTF
  


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  All assets/ (images, audio, and font) were converted to []byte using file2byteslice
  


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  The project is intended to be built with gomobile for development and testing, or with ebitenmobile for production releases using Android Studio
  

Build .apk for development and testing using gomobile:

  
// 1. Navigate to skulls/ and generate a .apk with gomobile:
gomobile build -target=android github.com/rootVIII/skulls/skullsgomobile
// 2. Install the newly created .apk into an already running Android Emulator:
adb -s  install skullsgomobile.apk
// Note: to list available emulators (including phone connected for debugging):
adb devices -l
// 3. View debug/logging output from the game:
adb logcat
  

  
// 1. Navigate to skulls/ and generate the .aar binding:
ebitenmobile bind -target android -javapkg com..skulls -o skulls.aar github.com/rootVIII/skulls/skullsebitenbind
// 2. Create a new Android Studio project (choose Empty Activity) and name it SkullsMobile
// 3. Import the new .aar as a module:
// Select File, New, New Module, Import .jar/.aar Package, select the previously built .aar named skulls.aar
// In app/build.gradle, add this line to the dependencies: compile project(':skulls')
// Example:
dependencies {
    implementation 'androidx.appcompat:appcompat:1.3.0'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    compile project(':skulls')
}
// Then follow screen prompts to sync the build.gradle change to the project
// 4. Place the following in app/src/main/java/com..skullsmobile/MainActivity.java:
package com..skullsmobile;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import go.Seq;
import com..skulls.skullsebitenbind.EbitenView;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Seq.setContext(getApplicationContext());
    }
    private EbitenView getEbitenView() {
        return (EbitenView)this.findViewById(R.id.ebitenview);
    }
    @Override
    protected void onPause() {
        super.onPause();
        this.getEbitenView().suspendGame();
    }
    @Override
    protected void onResume() {
        super.onResume();
        this.getEbitenView().resumeGame();
    }
}
// 5. Add a separate error handling class in app/src/main/java/com.skullsmobile/EbitenViewWithErrorHandling.java
package com.solsticenet.skullsmobile;
import android.content.Context;
import android.util.AttributeSet;
import com..skulls.skullsebitenbind.EbitenView;
class EbitenViewWithErrorHandling extends EbitenView {
    public EbitenViewWithErrorHandling(Context context) {
        super(context);
    }
    public EbitenViewWithErrorHandling(Context context, AttributeSet attributeSet) {
        super(context, attributeSet);
    }
    @Override
    protected void onErrorOnGameUpdate(Exception e) {
        // You can define your own error handling e.g., using Crashlytics.
        // e.g., Crashlytics.logException(e);
        super.onErrorOnGameUpdate(e);
    }
}
// 6. Add the below into app/src/main/res/AndroidManifest.xml:
    .skullsmobile.EbitenViewWithErrorHandling
        android:id="@+id/ebitenview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:focusable="true" />
// 7. The game should now be usable in Android Studio (sign the project with developer keys, UI adjustments in AndroidManifest.xml etc.)
  

This was developed on macOS Big Sur.