Android™ Application Development - Bahar Ali Khan

Chapter 9: Peer-to-Peer Communication
5. Update onCreate further to get references to each of the controls in the layout and wire up the
Spinner using the arrays defi ned in Step 3. Create two new stub methods, savePreferences
and updateUIFromPreferences, that will be updated to save the auto-responder settings
to a named SharedPreference and apply the saved SharedPreferences to the current UI,
respectively.
Spinner respondForSpinner;
CheckBox locationCheckbox;
EditText responseTextBox;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.autoresponder);
5.1. Start by getting references to each View.
respondForSpinner = (Spinner)findViewById(R.id.spinnerRespondFor);
locationCheckbox = (CheckBox)findViewById(R.id.checkboxLocation);
responseTextBox = (EditText)findViewById(R.id.responseText);
5.2. Populate the Spinner to let users select the auto-responder expiry time.
ArrayAdapter adapter = ArrayAdapter.createFromResource(
this,
R.array.respondForDisplayItems,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
respondForSpinner.setAdapter(adapter);
5.3. Now wire up the OK and Cancel buttons to let users save or cancel setting changes.
Button okButton = (Button) findViewById(R.id.okButton);
okButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
savePreferences();
setResult(RESULT_OK, null);
finish();
}
});
Button cancelButton = (Button) findViewById(R.id.cancelButton);
cancelButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
respondForSpinner.setSelection(-1);
savePreferences();
setResult(RESULT_CANCELED, null);
finish();
}
});
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