Using MyScript Software for recognising symbols drawn on a pdf file

I am developing an Android using PDFTron PDFNet SDK. I have just added the My script Geometry widget API so that I could recognise the symbols drawn or written by users. How can Integrate these tools?
Below is a code snippet for my project.

package com.myscript.atk.diagram.sample;

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;

import com.myscript.atk.geometry.widget.GeometryWidgetApi;
import com.myscript.certificate.MyCertificate;
import com.pdftron.common.PDFNetException;
import com.pdftron.pdf.PDFNet;

public class Main3Activity extends AppCompatActivity implements
        GeometryWidgetApi.OnConfigureListener,
        GeometryWidgetApi.OnRecognitionListener
{

    private static final String TAG = "GeometryDemo";

    private GeometryWidgetApi widget;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        try {
            PDFNet.initialize(this,R.raw.pdfnet);
        } catch (PDFNetException e) {
            e.printStackTrace();
        }
        setContentView(R.layout.activity_main3);
       // setContentView(R.layout.assessment_screen);

        widget = (GeometryWidgetApi) findViewById(R.id.geometry_widget);
        if (!widget.registerCertificate(MyCertificate.getBytes()))
        {
            AlertDialog.Builder dlgAlert  = new AlertDialog.Builder(this);
            dlgAlert.setMessage("Please use a valid certificate.");
            dlgAlert.setTitle("Invalid certificate");
            dlgAlert.setCancelable(false);
            dlgAlert.setPositiveButton("OK", new DialogInterface.OnClickListener()
            {
                public void onClick(DialogInterface dialog, int which)
                {
                    //dismiss the dialog
                }
            });
            dlgAlert.create().show();
            return;
        }

        // Listen to widget events (see onConfigurationBegin and onRecognitionEnd APIs)
        widget.setOnConfigureListener(this);
        widget.setOnRecognitionListener(this);

        // references assets directly from the APK to avoid extraction in application
        // file system
        widget.addSearchDir("zip://" + getPackageCodePath() + "!/assets/conf");

        // The configuration is an asynchronous operation. Callbacks are provided to
        // monitor the beginning and end of the configuration process and update the UI
        // of the input method accordingly.
        //
        // "shape" references the shape bundle name in conf/shape.conf file in your assets.
        // "standard" references the configuration name in shape.conf
        widget.configure("shape", "standard");
    }

    @Override
    protected void onDestroy()
    {
        widget.setOnRecognitionListener(null);
        widget.setOnConfigureListener(null);

        // release widget's resources
        widget.release();
        super.onDestroy();
    }

    @Override
    public void onConfigurationBegin(GeometryWidgetApi widget)
    {
    }

    @Override
    public void onConfigurationEnd(GeometryWidgetApi widget, boolean success)
    {
        if(!success)
        {
            Toast.makeText(getApplicationContext(), widget.getErrorString(), Toast.LENGTH_LONG).show();
            Log.e(TAG, "Unable to configure the Geometry Widget: " + widget.getErrorString());
            return;
        }
        Toast.makeText(getApplicationContext(), "Geometry Widget Configured", Toast.LENGTH_SHORT).show();
        if(BuildConfig.DEBUG)
            Log.d(TAG, "Geometry Widget configured!");
    }

    @Override
    public void onRecognitionBegin(GeometryWidgetApi widget)
    {
    }

    @Override
    public void onRecognitionEnd(GeometryWidgetApi widget)
    {
        Toast.makeText(getApplicationContext(), "Recognition update", Toast.LENGTH_SHORT).show();
        if(BuildConfig.DEBUG)
        {
            Log.d(TAG, "Geometry Widget recognition");
        }
    }
}

How can Integrate these tools?

Could you please kindly elaborate on exactly what you are looking for? A detailed description of what you are trying to achieve and how you are trying to do it will be helpful. Thanks in advance for the clarification.