title: How to create Qr code with multiple variable on a single QR code?
body: <p>My application project have qr code generator feature. I use the Zxing library to coding qr code generator, but it can generate qr code only single variable. i want to create qr code with 3 variable on a single qr code. please help me to create this.
  p.s. I'm a rookie for Android.</p>
  
  <p>my code</p>
  
  <pre><code>import android.content.Context;
  import android.content.Intent;
  import android.graphics.Bitmap;
  import android.os.Bundle;
  import android.support.v7.app.AppCompatActivity;
  import android.view.View;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.ImageView;
  import com.google.zxing.BarcodeFormat;
  import com.google.zxing.MultiFormatWriter;
  import com.google.zxing.WriterException;
  import com.google.zxing.common.BitMatrix;
  import com.journeyapps.barcodescanner.BarcodeEncoder;
  
  
  public class MainActivity extends AppCompatActivity {
  
  private EditText editText , editText2 , editText3;
  private String qrText1 , qrText2 , qrText3;
  private ImageView qrCodeView;
  
  @Override
  protected void onCreate(final Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
  
     editText = (EditText) this.findViewById(R.id.editText);
     editText2 = (EditText) this.findViewById(R.id.editText2);
     editText3 = (EditText) this.findViewById(R.id.editText3);
  
     Button generateBtn = (Button) this.findViewById(R.id.generateButton);
     qrCodeView = (ImageView) this.findViewById(R.id.imageView);
  
     generateBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           qrText1 = editText.getText().toString().trim();
           qrText2 = editText2.getText().toString().trim();
           qrText3 = editText3.getText().toString().trim();
  
           MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
           try {
              BitMatrix bitMatrix = multiFormatWriter.encode(qrText1, BarcodeFormat.QR_CODE, 200, 200);
              BarcodeEncoder barcodeEncoder = new BarcodeEncoder();
              Bitmap bitmap = barcodeEncoder.createBitmap(bitMatrix);
              qrCodeView.setImageBitmap(bitmap);
  
           } catch (WriterException e) {
              e.printStackTrace();
           }
        }
     });
   }
  }
  </code></pre>
  
  <p>I don't know how to add qrText2 and qrText3 with qrText1 on create a single qr code.</p>