QRScanner.java

package id.web.twoh.qrproject;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;

import com.example.BarcodeTest.IntentIntegrator;
import com.example.BarcodeTest.IntentResult;

public class QRScanner extends Activity {
    /** Called when the activity is first created. */

    private String upc;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //jendela tanpa title
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        //memulai pemindaian QRCode
        IntentIntegrator.initiateScan(this);
    }
    // cek hasil dari QRCode
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch(requestCode) {
            case IntentIntegrator.REQUEST_CODE: {
                if (resultCode != RESULT_CANCELED) {
                    IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
                    // apabila ada hasil dari pemindaian
                    if (scanResult != null) {
                        // ambil isi dari QRCode
                        upc = scanResult.getContents();
                        //  tampilkan pada Alert Dialog
                        final AlertDialog.Builder builder=new AlertDialog.Builder(QRScanner.this);
                        builder.setTitle("Hasil Scan");
                        builder.setMessage(upc+"\n");
                        builder.setIcon(android.R.drawable.ic_dialog_alert);
                        // Tombol untuk simpan data
                        builder.setPositiveButton("Simpan", new OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                    // Buat simpan ke database atau ke mana
                                    // doSomething();
                                    QRScanner.this.finish();
                                    IntentIntegrator.initiateScan(QRScanner.this);

                            }
                        });
                        // Tombol untuk coba lagi/keluar
                        builder.setNegativeButton("Coba Lagi", new OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                // TODO Auto-generated method stub
                                QRScanner.this.finish();
                                IntentIntegrator.initiateScan(QRScanner.this);
                            }

                        });
                        // tampilkan alert box
                        builder.show();
                    }
            break;
                }
            }
        }

    }
}