Android™ How to Program, Second Edition

4.5.4. Overriding Activity Method onCreate

The onCreate method (Fig. 4.20) is called by the system:

• when the app loads

• if the app’s process was killed by the operating system while the app was in the background, and the app is then restored

• each time the configuration changes, such as when the user rotates the device or opens or closes a physical keyboard.

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39      // called when MainActivity is first created40      @Override41      protected void onCreate(Bundle savedInstanceState)42      {43         super.onCreate(savedInstanceState);44         setContentView(R.layout.activity_main);45 46         // get references to the EditTexts47         queryEditText = (EditText) findViewById(R.id.queryEditText);48         tagEditText ...