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If you want to integrate ITC (ATK 1.3) into your Android Studio Gradle project, you will have to follow the steps below:
1. Add libs and jar file in the 'libs' folder of your application:
- sdk/libs (libMyScript2D.so, ..., libMyScriptEngine.so, ..., libMyScriptText.so)
- styluscore/libs (libStylusCore.so)
- itc/libs (libAtkItc.so)
- AtkItc jar file
- com.myscript.atk.styluscore.jar file
2. Edit build.gradle file of your application and add this block in the android section:
sourceSets.main {jniLibs.srcDir 'libs'}
3 You can then use PageInterpreter and other ITC classes by adding:

import com.myscript.atk.itc.*;
import com.myscript.atk.itc.Error;

4 You also need to copy resources into the 'assets' folder of your application:
- copy sample/itc/assets folder in your application (for instance: ITC1.3Gradleappsrcmainassets)
- copy the SimpleResourcesHelper.java from itc/sample/util
5 Add MyCertificate.java file in your project
- make sure the package name is the same than the bundle Identifier set on atk.myscript.com
- replace the byte array with the content of the certificate 'com.bundleIdentifier.name' downloaded from atk.myscript.com

6. example of snippet to add in 'MainActivity'.java:

PageInterpreter pageInterpreter = new PageInterpreter(getApplicationContext());
        pageInterpreter.setPageInterpreterListener(new IPageInterpreterListener() {
            @Override
            public void configureBegin(PageInterpreter pageInterpreter) {
                Log.d("ITCAPP", "configureBegin");
            }
            @Override
            public void configureEnd(PageInterpreter pageInterpreter, boolean success, String lang) {
                Log.d("ITCAPP", "configureEnd");
                if (!success) {
                    Log.e("ITCAPP", "Configuration Error: '" + pageInterpreter.getRecognitionErrorString() + "'");
                }
            }
        });
        DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
        List<String> resources = new ArrayList<>();
        resources.add("en_US/en_US-ak-cur.lite.res");
        resources.add("en_US/en_US-lk-text.lite.res");
        SimpleResourceHelper helper = new SimpleResourceHelper(this);
        final List<String> paths = helper.getResourcePaths(resources);
        List<String> lex = new ArrayList<>();
        com.myscript.atk.itc.Error error = pageInterpreter.configure("en_US", paths, lex, MyCertificate.getBytes(), displayMetrics.densityDpi);
        if(error.getError() != Error.ErrorCode.NoError) {
            Log.e("ITCAPP", "Configuration Error: '" + error.getErrorMessage() + "'");
        }

NB: please make sure to have all permission required in the AndroidManifest of your application:

uses-permission android:name="android.permission.INTERNET" 
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"

Please let us know if you have any question.
Best regards