tra-analysis/apps/android/main/java/com/example/ian/titanscout/qrActivity.java

package com.example.ian.titanscout;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.firestore.*;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

import static android.widget.Toast.makeText;


public class qrActivity extends AppCompatActivity {
    ImageView imageView;
    Button button;
    Button btnScan;
    EditText editText;
    String EditTextValue ;
    Thread thread;
    public final static int QRcodeWidth = 350;
    Bitmap bitmap;

    TextView tv_qr_readTxt;
    private Object MainActivity;


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

//        // WARNING: TAKE OUT OF FINAL CODE, ONLY FOR TESTING
//        this.move("auth-team-2022");

        IntentIntegrator integrator = new IntentIntegrator(qrActivity.this);
        integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
        integrator.setPrompt("Scan a teammate's QR!");
        integrator.setCameraId(0);
        integrator.setBeepEnabled(false);
        integrator.initiateScan();

        imageView = (ImageView)findViewById(R.id.imageView);
        editText = (EditText)findViewById(R.id.editText);
        button = (Button)findViewById(R.id.button);
        btnScan = (Button)findViewById(R.id.btnScan);
        tv_qr_readTxt = (TextView) findViewById(R.id.tv_qr_readTxt);

    }


    Bitmap TextToImageEncode(String Value) throws WriterException {
        BitMatrix bitMatrix;
        try {
            bitMatrix = new MultiFormatWriter().encode(
                    Value,
                    BarcodeFormat.DATA_MATRIX.QR_CODE,
                    QRcodeWidth, QRcodeWidth, null
            );

        } catch (IllegalArgumentException Illegalargumentexception) {

            return null;
        }
        int bitMatrixWidth = bitMatrix.getWidth();

        int bitMatrixHeight = bitMatrix.getHeight();

        int[] pixels = new int[bitMatrixWidth * bitMatrixHeight];

        for (int y = 0; y < bitMatrixHeight; y++) {
            int offset = y * bitMatrixWidth;

            for (int x = 0; x < bitMatrixWidth; x++) {

                pixels[offset + x] = bitMatrix.get(x, y) ?
                        getResources().getColor(R.color.QRCodeBlackColor):getResources().getColor(R.color.QRCodeWhiteColor);
            }
        }
        Bitmap bitmap = Bitmap.createBitmap(bitMatrixWidth, bitMatrixHeight, Bitmap.Config.ARGB_4444);

        bitmap.setPixels(pixels, 0, 350, 0, 0, bitMatrixWidth, bitMatrixHeight);
        return bitmap;
    }


    void move(String withCode) {
        Log.e("START", "START");
        Intent intent = new Intent(this, PrematchesActivity.class);
        intent.putExtra("auth", withCode);
        startActivity(intent);

        Log.e("END", "END");
    }

    @Override
    protected void onActivityResult(int requestCode, final int resultCode, Intent data) {




        final IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        if(result != null) {
            if(result.getContents() == null) {
                Log.e("Scan", "Cancelled scan");
            } else {
                Log.e("Scan", "Scanned");

                tv_qr_readTxt.setText(result.getContents());





                // Access a Cloud Firestore instance from your Activity
                FirebaseFirestore db = FirebaseFirestore.getInstance();
                db.collection("data")
                        .get()
                        .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
                            private static final String TAG = "Firestore";

                            @Override
                            public void onComplete(@NonNull Task<QuerySnapshot> task) {
                                if (task.isSuccessful()) {
                                    for (QueryDocumentSnapshot document : task.getResult()) {

                                        if (document.getId().equals(result.getContents())) {
                                            makeText(qrActivity.this, "Scan Successful!", Toast.LENGTH_LONG).show();
                                            move(result.getContents());

                                        } else {
                                            makeText(qrActivity.this, "Team not registered. Please try again.", Toast.LENGTH_LONG).show();
                                        }

                                        Log.d(TAG, document.getId() + " => " + document.getData());
                                    }
                                } else {
                                    Log.d(TAG, "Error getting documents: ", task.getException());
                                }
                            }
                        });

                makeText(this, "Scanned: " + result.getContents(), Toast.LENGTH_LONG).show();
            }
        } else {
            // This is important, otherwise the result will not be passed to the fragment
            super.onActivityResult(requestCode, resultCode, data);
        }
    }
}