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DavidInnocent/qr scanner

Created April 30, 2020 08:59
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  1. DavidInnocent created this gist Apr 30, 2020.
    294 changes: 294 additions & 0 deletions qr scanner
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,294 @@
    package com.co.ximmoz.FireFy.ui.views.Activities;

    import android.Manifest;
    import android.content.DialogInterface;
    import android.content.Intent;
    import android.content.pm.PackageManager;
    import android.graphics.PointF;
    import android.os.Build;

    import android.os.Bundle;
    import android.widget.Button;
    import android.widget.Toast;

    import androidx.annotation.NonNull;
    import androidx.appcompat.app.AlertDialog;
    import androidx.appcompat.app.AppCompatActivity;
    import androidx.core.app.ActivityCompat;
    import androidx.core.content.ContextCompat;

    import com.co.ximmoz.FireFy.ui.views.auth.LoginActivity;
    import com.co.ximmoz.FireFy.utils.RedeemToken;
    import com.co.ximmoz.FireFy.data.models.User;
    import com.co.ximmoz.adfy.R;
    import com.dlazaro66.qrcodereaderview.QRCodeReaderView;
    import com.google.android.gms.tasks.OnCompleteListener;
    import com.google.android.gms.tasks.Task;
    import com.google.firebase.auth.FirebaseAuth;
    import com.google.firebase.auth.FirebaseUser;
    import com.google.firebase.database.DataSnapshot;
    import com.google.firebase.database.DatabaseError;
    import com.google.firebase.database.DatabaseReference;
    import com.google.firebase.database.FirebaseDatabase;
    import com.google.firebase.database.ValueEventListener;

    public class ScanQrActivity extends AppCompatActivity implements QRCodeReaderView.OnQRCodeReadListener {

    private static final int PERMISSION_REQUEST_CODE = 200;

    private QRCodeReaderView qrCodeReaderView;
    private DatabaseReference databaseReference;
    private RedeemToken token_data;
    private Button Dashboardd;
    private double final_amount_of_token=0;

    @Override
    protected void onStart() {
    super.onStart();
    FirebaseUser user=FirebaseAuth.getInstance().getCurrentUser();
    if(user==null){
    startActivity(new Intent(ScanQrActivity.this, LoginActivity.class));
    finish();
    }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan_qr);
    databaseReference= FirebaseDatabase.getInstance().getReference();
    qrCodeReaderView = findViewById(R.id.qrdecoderview);


    if (checkPermission()) {
    qrCodeReaderView.setOnQRCodeReadListener(this);

    // Use this function to enable/disable decoding
    qrCodeReaderView.setQRDecodingEnabled(true);

    //Use this to set the image to display in the background_green.
    //qrCodeReaderView.setBackgroundResource(R.drawable.qr_background);

    // Use this function to change the autofocus interval (default is 5 secs)
    qrCodeReaderView.setAutofocusInterval(5000L);

    // Use this function to enable/disable Torch
    qrCodeReaderView.setTorchEnabled(true);

    // Use this function to set front camera preview
    qrCodeReaderView.setPreviewCameraId(0);

    qrCodeReaderView.setFrontCamera();

    // Use this function to set back camera preview
    qrCodeReaderView.setBackCamera();

    } else {
    requestPermission();
    }

    }
    private boolean checkPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
    != PackageManager.PERMISSION_GRANTED) {
    // Permission is not granted
    return false;
    }
    return true;
    }
    private void requestPermission() {

    ActivityCompat.requestPermissions(this,
    new String[]{Manifest.permission.CAMERA},
    PERMISSION_REQUEST_CODE);
    }

    @Override
    public void onQRCodeRead(final String token_text, PointF[] points) {

    final String user_id=FirebaseAuth.getInstance().getCurrentUser().getUid();
    if(token_text.toLowerCase().endsWith("bat"))
    {
    databaseReference.child("Redeem").child(token_text).child(user_id).addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
    if(dataSnapshot.exists())
    {
    Toast.makeText(ScanQrActivity.this, "You have already redeemed" , Toast.LENGTH_SHORT).show();
    startActivity(new Intent(ScanQrActivity.this, UserDashboardActivity.class));
    finish();
    }
    else
    {
    databaseReference.child("Redeem").child(token_text).addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
    if(!dataSnapshot.exists())
    {
    Toast.makeText(ScanQrActivity.this, "None Redeemable Code Detected", Toast.LENGTH_SHORT).show();
    return;
    }
    token_data=dataSnapshot.getValue(RedeemToken.class);
    databaseReference.child("USERS").child(user_id).addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
    User user=dataSnapshot.getValue(User.class);
    double amount_to_award_user=user.getAccountBalance()+token_data.getAmount_to_award();
    final double final_amount_of_token1=token_data.getAccount_balance()-token_data.getAmount_to_award();
    databaseReference.child("USERS").child(user_id).child("accountBalance").setValue(amount_to_award_user).addOnCompleteListener(new OnCompleteListener<Void>() {
    @Override
    public void onComplete(@NonNull Task<Void> task) {
    if(task.isSuccessful())
    {
    databaseReference.child("Redeem").child(token_text).child(user_id).setValue(true).addOnCompleteListener(new OnCompleteListener<Void>() {
    @Override
    public void onComplete(@NonNull Task<Void> task) {
    if(task.isSuccessful())
    {

    databaseReference.child("Redeem").child(token_text).child("account_balance").setValue(final_amount_of_token1).addOnCompleteListener(new OnCompleteListener<Void>() {
    @Override
    public void onComplete(@NonNull Task<Void> task) {
    if(task.isSuccessful())
    {
    Toast.makeText(ScanQrActivity.this, "DONEEEEE", Toast.LENGTH_SHORT).show();
    }
    else
    {
    Toast.makeText(ScanQrActivity.this, "failed for some reason", Toast.LENGTH_SHORT).show();
    }

    }
    });

    }
    else
    {
    Toast.makeText(ScanQrActivity.this, "FAILEDDDDD", Toast.LENGTH_SHORT).show();
    }
    }
    });
    }
    else
    {
    Toast.makeText(ScanQrActivity.this, "Something Went Wrong", Toast.LENGTH_SHORT).show();
    return;
    }
    }
    });
    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
    Toast.makeText(ScanQrActivity.this, "Something Went Wrong", Toast.LENGTH_SHORT).show();
    }
    });

    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
    Toast.makeText(ScanQrActivity.this, "Something Went Wrong", Toast.LENGTH_SHORT).show();
    }
    });
    }
    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
    Toast.makeText(ScanQrActivity.this, "Something Went Wrong", Toast.LENGTH_SHORT).show();
    }
    });

    }
    else {
    databaseReference.child("SHOPS").child(token_text).addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
    if(dataSnapshot.exists())
    {
    Intent intent =new Intent(ScanQrActivity.this, shopOwnerRedeemActivity.class);
    intent.putExtra("ShopID",token_text);
    startActivity(intent);
    finish();
    }
    else
    {
    Toast.makeText(ScanQrActivity.this, "Business Not Registered", Toast.LENGTH_SHORT).show();
    startActivity(new Intent(ScanQrActivity.this, UserDashboardActivity.class));
    finish();

    }
    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
    startActivity(new Intent(ScanQrActivity.this, UserDashboardActivity.class));
    finish();
    }
    });
    }



    }







    @Override
    public void onBackPressed() {
    startActivity(new Intent(ScanQrActivity.this, UserDashboardActivity.class));
    finish();
    }

    @Override
    protected void onResume() {
    super.onResume();
    qrCodeReaderView.startCamera();
    }

    @Override
    protected void onPause() {
    super.onPause();
    qrCodeReaderView.stopCamera();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
    case PERMISSION_REQUEST_CODE:
    if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
    return;
    } else {
    Toast.makeText(getApplicationContext(), "Permission Denied", Toast.LENGTH_SHORT).show();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
    != PackageManager.PERMISSION_GRANTED) {
    showMessageOKCancel("Camera access needed to capture QR Codes",
    new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    requestPermission();
    }
    }
    });
    }
    }
    }
    break;
    }
    }
    private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
    new AlertDialog.Builder(ScanQrActivity.this)
    .setMessage(message)
    .setPositiveButton("OK", okListener)
    .setNegativeButton("Cancel", null)
    .create()
    .show();
    }
    }