In this project we implement a Unity game in Android Studio using libraries. Also, we include the moving enemy in the vertical axes, so not exhibit the problem that showed previously. All the paths mentioned are relatives to the project, so do not forget to put PROJECT_NAME/.. before the paths. To upload an image into a README we can use this: - go to Issues and drag the image - copy the link and paste it into README (copy it in the line where you want to visualize the image) The steps that we follow are this:

EXPORT FROM UNITY

We create a script where we let the user go back in the android application. Then export the project into an Android project as follows:

Very important to select Auto Graphics API.

ANDROID STUDIO

Once we have exported the game, itÕs time to open with the Android Studio. Import project from Grade --> Yes (to sync automatically gradle files).

1. Comment the Androidmanifest.xml file, in particular , to make our project non executable.

2. Insert in the module gradle file, the next line, changing application for library: apply plugin: 'com.android.library'

3. If we have some errors building or updating the gradle, this can help you: Add this in buildscript and allprojects of module gradle file.

repositories { google() jcenter() }

4. Finally, debug the project and find the .aar file generated: /build/outputs/aar/

NATIVE ANDROID APP USING JAR/AAR LIBRARY

Create a new project, and import new module JAR/AAR Package, select the .aar file created earlier, and finish the import. Make sure that we have

include ':app', ':your_aar_file_name', and add the following to module app gradle.build compile project(":your_aar_file_name") compile fileTree(dir: 'libs', include: ['*.jar']). Now sync gradle.

If we have a problem like this: MANIFEST MERGER FAILED WITH MULTIPLE ERROR, SEE LOGS. Add the following lines to our Androidmanifest.xml file.

• adding to manifest tagÊxmlns:tools="http://schemas.android.com/tools"
• adding to the application tagtools:replace="android:icon,android:theme"

CREATE A SEONCDARY LAYOUT THAT CALLS THE MAIN LAYOUT AND RUN THE GAME We have implemented a button with the following code in MainActivity: public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button unityButton = findViewById(R.id.button1);
    unityButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this,ConfigurationActivity.class));
        }
    });
}

}

Adding this to a new class called ConfigurationActivity:

public class ConfigurationActivity extends AppCompatActivity { Context mContext = this;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Intent intent = new Intent(mContext, UnityPlayerActivity.class);
    startActivity(intent);
}

}

Adding this code to the Androidmanifest.xml file:

EXPORT PROJECT AS AN APK To generate apk file go to: RUN --> EDIT CONFIGURATIONS --> SELECT Ô+Õ AND CREATE GRADLE --> SELECT OUR GRADLE PORJECT --> ASSIGN ÔASSEMBLEÕ IN TASKS --> APPLY. The apk is generated in the following path: /app/build/outputs/apk/