HelloInputStick

public class HelloInputStick extends Activity implements USBDeviceListener {

  private static final USBKeyboard keyb = new USBKeyboard();

	private Button buttonConnect;
	private Button buttonType;

	public void onUSBData(int endpoint, byte[] data) {
	}

	public void onUSBEvent(int code) {
		manageUI();
	}

	private void manageUI() {
		int state = keyb.getState();
		switch (state) {
		case USBDevice.STATE_NONE:
			buttonConnect.setText(getString(R.string.string_connect));
			buttonConnect.setEnabled(true);
			enableUI(false);
			break;
		case USBDevice.STATE_CONNECTING:
			buttonConnect.setText(getString(R.string.string_connecting));
			buttonConnect.setEnabled(false);
			enableUI(false);
			break;
		case USBDevice.STATE_CONNECTED:
			buttonConnect.setText(getString(R.string.string_disconnect));
			buttonConnect.setEnabled(true);
			enableUI(false);
			break;
		case USBDevice.STATE_READY:
			buttonConnect.setText(getString(R.string.string_disconnect));
			buttonConnect.setEnabled(true);
			enableUI(true);
			break;
		}
	}

	private void enableUI(boolean enabled) {
		buttonType.setEnabled(enabled);
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_hello_input_stick);

		keyb.setContext(this.getApplicationContext());
		keyb.registerListener(this);

		buttonConnect = (Button) findViewById(R.id.buttonConnect);
		buttonConnect.setOnClickListener(new OnClickListener() {
			public void onClick(View arg0) {
				switch (keyb.getState()) {
				case USBDevice.STATE_NONE:
					keyb.connect();
					break;
				case USBDevice.STATE_CONNECTED:
				case USBDevice.STATE_READY:
					keyb.disconnect();
					break;
				}
			}
		});

		buttonType = (Button) findViewById(R.id.buttonType);
		buttonType.setOnClickListener(new OnClickListener() {
			public void onClick(View arg0) {
				keyb.type("Hello world!");
			}
		});
	}

}