android {
    ndkVersion "22.1.7171670"
    defaultConfig {
        minSdkVersion 21
        ndk{
            abiFilters "armeabi-v7a", "arm64-v8a", "x86", "x86_64"
        }
        Python {
            buildPython "C:/Users/xxxx/AppData/Local/Programs/Python/Python311/python.exe"
            pip {
                install "numpy"
                install "patchify"
                install "pillow"
                install "opencv-python"
            }
        }
    }
}

android{
	sourceSets{
		main{
			python.srcDir “path/to/dir”
		}
	}
} 

if(!Python.isStarted()){
            Python.start(new AndroidPlatform(getApplicationContext()));
        }

        //obtain the python instance
        py = Python.getInstance();

package me.example.test;

import androidx.appcompat.app.AppCompatActivity;
import android.widget.Toast;

import com.chaquo.python.PyObject;
import com.chaquo.python.Python;
import com.chaquo.python.android.AndroidPlatform;


public class MyActivity extends AppCompatActivity {
    private Python py;
    private Button btnMath;
	private Button btnShowButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        Intent getImage = getIntent();       
		
		//instantiate the Button with id btnDoMath decleared in xml 
		//layout file activity_my
        btnMath = findViewById(R.id.btnDoMath);
        btnMath.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String res = getMaths();
				Toast.makeText(MyActivity.this, res, Toast.LENGTH_LONG).show();
            }
        });
		//instantiate the Button with id btnShowButton decleared in xml 
		//layout file activity_my
		btnShowButton = findViewById(R.id.btnShowButton);
		btnShowButton.setOnClickListener(new View.onClickListener(){
			@Override
			public void onClick(View v){
				String show = showButtonPosition("Apple, Mango, Button, Guava, Button");
				Toast.makeText(MyActivity.this, show, Toast.LENGTH_LONG).show();
			}
		});
        if(!Python.isStarted()){
            Python.start(new AndroidPlatform(getApplicationContext()));
        }

        //obtain the python instance
        py = Python.getInstance();
        dispStat = findViewById(R.id.dispStat);
    }

	private String showButtonPosition(String inText){
		PyObject myObj = py.getModule("mytest");
        PyObject result = myObj.callAttr("findFirstButton", inText);
        List list = result.asList();
		PyObject output = list.get(0);
		int position = output.toInt();
		String printRes = "First occurance of Button in the string is at "+position;
		return printRes;
	}
     private String getMaths(int v1, int v2){
        PyObject sys = py.getModule("sys");
        PyObject is = py.getModule("io");
        PyObject myObj = py.getModule("mytest");
        PyObject result = myObj.callAttr("returnMath", v1,v2);
        List list = result.asList();
        PyObject res1 = list.get(0);
        PyObject res2 = list.get(1);
        PyObject res3 = list.get(2);
   
        String str1 = res1.toString();
        String str2 = res2.toString();
        String str3 = res3.toString();
        
		String printRes = "Multiplication :"+ str1;
		printRes += "\nAddition: "+ str2;
		printRes += "\nSum of squares: "+ str3;
       return printRes;   
    }
}

import numpy as np
from patchify import patchify
import cv2
#import opencv-python
#%matplotlib inline

#the function below is just an example
def getBinary(image_gr_ByteArr,threshold,height):
	patches= []
	thresh = 90
	decode = cv2.imdecode(np.asarray(image_gr_ByteArr),cv2.IMREAD_UNCHANGED)
	encode = cv2.imencode('.png', image_bw)[1]
	data_encode = np.array(encode)
	return data_encode.tobytes(), threshold
	
def returnMath(val1, val2):
	res1 = val1*val2
	res2 = val1 + val2
	res3 = val1**2 + val2**2
	return res1,res2,res3
	
def findFirstButton(sentence):
	first_index = sentence.find('Button')
	return first_index