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I have been trying to integrate/use OpenCV in Android Studio. But I keep getting stuck with this error.

C:AndroidStudioProjectsIntegrateOpenCV341appsrcmainresvaluescolors.xml:1:1: Error: Content is not allowed in prolog.

I have tried to use:

• 
  

  OpenCV-2.4.9-Android-SDK

  
  
  

  
  

  reason: Most tutorials (outdated) work with this version

  
  

  
  


• 
  

  OpenCV-3.4.1-Android-SDK

  
  
  

  
  

  reason: Version with the latest tutorial (August 2018)

  
  

  
  


• 
  

  OpenCV-3.4.6-Android-SDK

  
  
  

  
  

  reason: Second latest version of OpenCV sdk android

  
  

  
  


• 
  

  OpenCV-4.1.0-Android-SDK

  
  
  

  
  

  reason: Latest version of OpenCV sdk android as of now

  
  

  
  

I went through these steps without error:

1. Import Module (in a project)


2. Add Dependency


3. Edit compileSdkversion and targetSdkversion of OpenCV's build.gradle to match with app's build.gradle


4. Made a Native folder (JNI folder) named jniLibs and copied the files inside sdk>native>libs to it


5. 
   

   Typed in this code in MainActivity.java to check if it works*

   
   
   

   package com.example.integrateopencv249; //also tried with 3.4.1 and 4.1.0
   
   
   
   import android.support.v7.app.AppCompatActivity;
   
   import android.os.Bundle;
   
   import android.widget.Toast;
   
   
   
   import org.opencv.android.OpenCVLoader;
   
   
   
   public class MainActivity extends AppCompatActivity {
   
   
   
   @Override
   
   protected void onCreate(Bundle savedInstanceState) {
   
       super.onCreate(savedInstanceState);
   
       setContentView(R.layout.activity_main);
   
   
   
       if(OpenCVLoader.initDebug()) {
   
           Toast.makeText(getApplicationContext(), "OpenCV successfully loaded", Toast.LENGTH_SHORT).show();
   
       }
   
       else{
   
           Toast.makeText(getApplicationContext(), "OpenCV failed to load", Toast.LENGTH_SHORT).show();
   
       }
   
   }
   
   }
   
   

   
   

But after I run the last step. It just fails.

This is what is inside the color.xml (it is the same with all versions of OpenCV sdk)

package org.opencv.core;



import java.util.Arrays;import java.util.List;





public class MatOfRect extends Mat {// 32SC4private static final int _depth = CvType.CV_32S;private static final int

These are the details of my Android Studio:

Android Studio 3.3.2

Build #AI-182.5107.16.33.5314842, built on February 16, 2019

JRE: 1.8.0_152-release-1248-b01 amd64

JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

Windows 10 10.0

(All of the SDK Tools are installed)

I tried to search for solutions to this problem but none are helpful to my situation.
Please help me :( I'm a complete beginner and I really want to start learning how to use OpenCV in Android Studio. I'd appreciate any help or suggestions.

note: I didn't continue OpenCV 4.1.0 after the first step because the module name only shows "java" and doesn't automatically update to the format "openCVLibrary410" as all the other versions before it do.