unable to get data in onActivityResult()

I'm getting some values from an `Activity` and getting those in `onActivityResult()`, `onActivityResult()` is invoked but data recieved is `null` `CODE` of `MainActivity` ``` @Override public boolean onMenuItemSelected(int featureId, MenuItem item) { // TODO Auto-generated method stub if(item.getItemId() == R.id.action_settings){ Intent intent = new Intent(MainActivity.this, AddDetailActivity.class); startActivityForResult(intent, request_code); } return true; } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub super.onActivityResult(requestCode, resultCode, data); if(requestCode == request_code){ if(resultCode == RESULT_OK){ String name = data.getExtras().getString(AddDetailActivity.NAME_KEY); String address = data.getExtras().getString(AddDetailActivity.ADDRESS_KEY); Toast.makeText(MainActivity.this, "Name is : " + name + " Address : " + address, Toast.LENGTH_LONG).show(); } } } ``` and this is the second `Activity` from which Im getting data like this : ``` public class AddDetailActivity extends Activity { public static final String NAME_KEY = "U-name"; public static final String ADDRESS_KEY = "add"; protected EditText name_et, address_et; protected String put_name, put_address; protected Button button = null; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.activity_add_detail); name_et = (EditText) this.findViewById(R.id.name_editText); address_et = (EditText) this.findViewById(R.id.address_editText); put_name = name_et.getText().toString(); put_address = address_et.getText().toString(); //put_type = null; button = (Button) findViewById(R.id.add_button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub Intent intent = new Intent(); intent.putExtra(NAME_KEY, put_name); intent.putExtra(ADDRESS_KEY, put_address); setResult(RESULT_OK, intent); finish(); } }); }} ``` how to solve this bug, thanks