Handler Class

 public abstract class BapiHandler extends Handler {

    	protected void handler_Message_StateChange_Connected(Message msg) {};

    	protected void handler_Message_StateChange_Connecting(Message msg) {};

    	protected void handler_Message_StateChange_Listen_None(Message msg) {};

    	protected void handler_Message_Write(Message msg) {}

    	protected void handler_Message_Measurement_Reading(Message msg) {}

    	protected void handler_Message_Device_Name(Message msg) {}

    	protected void handler_Message_Show_Toast(Message msg) {}

    	protected void handler_Message_Bluetooth_Discovery_Started(Message msg) {}

    	protected void handler_Message_Bluetooth_Discovery_Ended(Message msg) {}

    	protected void handler_Message_Remote_Device_Found(Message msg) {}

    	protected void handler_Message_Bluetooth_Lost(Message msg) {}

    	protected void handler_Message_Bluetooth_Found(Message msg){}

    	protected void handler_Message_Remote_Device_Lost(Message msg) {}

    	protected void handler_Message_SetAliasName_Response(Message msg){}

    	protected void handler_Message_Start_Calieberation_Mode(Message msg){}

    	protected void handler_Message_Calibration_Reading(Message msg){}

    	/**
    	 * @author sandipj
    	 * @param msg
    	 *         -- msg received from broadcast receiver and BluetoothSensorConnectionService
    	 */
    	public void handleMessage(Message msg) {
    		//TODO do your stuff here

    		switch (msg.what) {
    			case GlobalValues.MESSAGE_STATE_CHANGE:
    				Log.i("BapiHandler", "MESSAGE_STATE_CHANGE: " + msg.arg1);
    				switch (msg.arg1) {
    				case GlobalValues.STATE_CONNECTED:
    					handler_Message_StateChange_Connected(msg);
    					break;
    				case GlobalValues.STATE_CONNECTING:
    					handler_Message_StateChange_Connecting(msg);
    					break;
    				case GlobalValues.STATE_LISTEN:
    				case GlobalValues.STATE_NONE:
    					handler_Message_StateChange_Listen_None(msg);
    					break;
    				}
    				break;

    			case GlobalValues.MESSAGE_WRITE:
    				handler_Message_Write(msg);
    				break;

    			case GlobalValues.MESSAGE_MEASUREMENT_READING:
    				handler_Message_Measurement_Reading(msg);
    				break;

    			case GlobalValues.MESSAGE_DEVICE_NAME:
    				handler_Message_Device_Name(msg);
    				break;

    			case GlobalValues.MESSAGE_SHOW_TOAST:
    				handler_Message_Show_Toast(msg);
    				break;

    			case GlobalValues.MESSAGE_BLUETOOTH_DESCOVERY_STARTED:
    				handler_Message_Bluetooth_Discovery_Started(msg);
    				break;

    			case GlobalValues.MESSAGE_BLUETOOTH_DESCOVERY_ENDED:
    				handler_Message_Bluetooth_Discovery_Ended(msg);
    				break;

    			case GlobalValues.MESSAGE_REMOTE_DEVICE_FOUND:
    				handler_Message_Remote_Device_Found(msg);
    				break;

    			case GlobalValues.MESSAGE_BLUETOOTH_CONNECTION_LOST:
    				handler_Message_Bluetooth_Lost(msg);
    				break;

    			case GlobalValues.MESSAGE_BLUETOOTH_CONNECTION_FOUND:
    				handler_Message_Bluetooth_Found(msg);
    				break;

    			case GlobalValues.MESSAGE_REMOTE_DEVICE_LOST:
    				handler_Message_Remote_Device_Lost(msg);
    				break;

    			case GlobalValues.MESSAGE_SET_ALIAS_READ:
    				handler_Message_SetAliasName_Response(msg);
    				break;

    			case GlobalValues.MESSAGE_START_CALIBERATION_MODE:
    				handler_Message_Start_Calieberation_Mode(msg);
    				break;

    			case GlobalValues.MESSAGE_CALIBERATION_READING:
    				handler_Message_Calibration_Reading(msg);
    				break;

    		}
    	}

    }