gistfile1.txt

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
       
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());     
        if(prefs !=null && prefs.getString("username", null)!=null)
        {
         Intent i = new Intent(getApplicationContext(), Customer.class);
         startActivity(i);
        }                    
        etUsername = (EditText)findViewById(R.id.username);