HelloInputStick

gistfile1.java

package com.example.helloinputstick;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import com.example.inputsticklibrary.usb.USBDevice;
import com.example.inputsticklibrary.usb.USBDeviceListener;
import com.example.inputsticklibrary.usb.devices.USBKeyboard;

//USBDeviceListener interface allows to receive callbacks 
public class HelloInputStick extends Activity implements USBDeviceListener {

  //create new instance of USBKeyboard
	//if your app consists of more than one Activity 
	//it might be a good idea to use some sort of Singleton class to share USBKeyboard 
	private static final USBKeyboard keyb = new USBKeyboard();	

	private Button buttonConnect;
	private Button buttonType;

	//called when data is received form USB host
	@Override
	public void onUSBData(int endpoint, byte[] data) {
		// TODO Auto-generated method stub
		//USBKeyboard already takes care of handling NumLock/CapsLock/ScrollLock state
	}

	//Called when connection state has changed, update UI
	public void onUSBEvent(int code) {
		manageUI();
	}

	//Set appropriate caption for buttonConnect, depending on current connection state
	//Enable buttonType only if InputStick has been successfully enumerated
	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);

		//Pass application context! 
		//It will allow to bind to InputStickService (part of DeviceManager app) 
		keyb.setContext(this.getApplicationContext());

		buttonConnect = (Button) findViewById(R.id.buttonConnect);
		buttonConnect.setOnClickListener(new OnClickListener() {
			public void onClick(View arg0) {
				//Action depends on current connection state
				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);
		//choose one!		
		buttonType.setOnClickListener(new MyOnClickListener());
		//buttonType.setOnClickListener(new MyOnClickListenerCaps());
		//buttonType.setOnClickListener(new MyOnClickListenerLayout());
	}		

	@Override
	protected void onResume() {
	    super.onResume();
	    //register as a listener for callbacks
	    keyb.registerListener(this);
	    //Update UI depending on current connection state
	    manageUI();   
	}

	@Override
	protected void onPause() {		
	    super.onPause();
	    //Activity is paused, unregister listener
	    keyb.unregisterListener();
	}
	
	//1) Simple case: ignore CapsLock and assume keyboard layout used in OS is set to EN-US or compatible
	private class MyOnClickListener implements OnClickListener {
		@Override
		public void onClick(View arg0) {
			//SHIFT key + H key = 'H'
			keyb.pressAndRelease(USBKeyboard.SHIFT_LEFT, USBKeyboard.KEY_H); 
			//E key = 'e'
			keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_E); 
			//'llo world!', USBKeyboard class takes care of adding SHIFT key when necessary
			keyb.type("llo world!"); 
			//press ENTER key
			keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_ENTER);
			//type 'XyZ'
			keyb.type("XyZ");
		}		
	}		
	
	//2) Take state of CapsLock into account
	private class MyOnClickListenerCaps implements OnClickListener {
		@Override
		public void onClick(View arg0) {
			if (keyb.isCapsLockOn()) {
				//CapsLock is on! Change case of keys affected by CapsLock
				keyb.type("hELLO WORLD!");
				keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_ENTER);
				keyb.type("xYz");
			} else {
				keyb.pressAndRelease(USBKeyboard.SHIFT_LEFT, USBKeyboard.KEY_H); 
				keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_E); 
				keyb.type("llo world!"); 
				keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_ENTER);
				keyb.type("XyZ");					
			}
		}		
	}	
		
	//3) Assume that USB host uses different keyboard layout: qwertz instead of qwerty 
	private class MyOnClickListenerLayout implements OnClickListener {
		@Override
		public void onClick(View arg0) {
			if (keyb.isCapsLockOn()) {
				//CapsLock is on! Change case of keys affected by CapsLock
				keyb.type("hELLO WORLD!");
				keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_ENTER);
				//replace 'z' and 'y' characters to produce expected result
				keyb.type("xZy"); 
			} else {
				keyb.pressAndRelease(USBKeyboard.SHIFT_LEFT, USBKeyboard.KEY_H); 
				keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_E); 
				keyb.type("llo world!"); 
				keyb.pressAndRelease(USBKeyboard.NONE, USBKeyboard.KEY_ENTER);
				//replace 'z' and 'y' characters to produce expected result
				keyb.type("XzY"); 					
			}			
		}
		
	}

}