Question

Consider the scenario: I made two android Apps, say A & B. B Scans an NFC tag, stored a string “nfcservice” and I stored that string in a byte array, say TEMP_MSG as hex. After that I converted that array into String and sent it to App-A. In App-A I tried to match it, but it fails everytime. What is the problem? Can you suggest something?

App-B code:

//nfcservice
byte[] TEMP_MSG = {(byte)0x6E, (byte)0x66, (byte)0x63, (byte)0x73, (byte)0x65,
                   (byte)0x72, (byte)0x76, (byte)0x69, (byte)0x63, (byte)0x65}; 

String nfcservicestring = new String(TEMP_MSG);
Intent intent = new Intent("com.android.apps.metromanager.MetroManagerActivity");
intent.putExtra("keyword", nfcservicestring);
startActivity(intent);

App-A code:

public class MetroManagerActivity extends Activity 
{
    TextView myText;
    String myString;    
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_metro_manager);
        Bundle bundle = getIntent().getExtras();
        if(bundle!=null) {
            myString = bundle.getString("keyword");
            Toast.makeText(getApplicationContext(), myString, Toast.LENGTH_LONG).show();
            if(myString.equals("nfcservice")) {
                LinearLayout lView = new LinearLayout(this);
                myText = new TextView(this);
                myText.setText("Welcome");
                lView.addView(myText);
                setContentView(lView);
            } else {
                LinearLayout lView = new LinearLayout(this);
                myText = new TextView(this);
                myText.setText("Bye Bye");
                lView.addView(myText);
                setContentView(lView);
            }
        }
    }
}

Answer 1

Your byte initialization has a fault, at the 5th byte you have:

 , byte)0x65,

Instead of:

  ,(byte)0x65,

However, why don’t you try to get some other attributes from your bundle object, and examine them by debugging and watching?