BleUtils.java

package com.movisens.gattsensorexample.utils;

import java.util.List;
import java.util.UUID;

import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattService;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.util.Log;

import com.movisens.gattsensorexample.services.BluetoothLeService;

public class BleUtils {

	private final static String TAG = BleUtils.class.getSimpleName();

	public static boolean hasBluetoothLE(Context context) {
		return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2 && context
				.getPackageManager().hasSystemFeature(
						PackageManager.FEATURE_BLUETOOTH_LE));
	}

	public static void enableCharacteristicNotification(UUID enableUuid,
			String name, List<BluetoothGattCharacteristic> gattCharacteristics,
			BluetoothLeService mBluetoothLeService) {
		BluetoothGattCharacteristic gattCharacteristic = findCharacteristic(
				enableUuid, gattCharacteristics);
		if (gattCharacteristic != null) {
			Log.d(TAG, "Enable " + name);
			mBluetoothLeService.setCharacteristicNotification(
					gattCharacteristic, true);
		}
	}

	public static void readCharacteristic(UUID enableUuid, String name,
			List<BluetoothGattCharacteristic> gattCharacteristics,
			BluetoothLeService mBluetoothLeService) {
		BluetoothGattCharacteristic gattCharacteristic = findCharacteristic(
				enableUuid, gattCharacteristics);
		if (gattCharacteristic != null) {
			Log.d(TAG, "Read " + name);
			mBluetoothLeService.readCharacteristic(gattCharacteristic);
		}
	}

	public static void writeCharacteristic(UUID enableUuid, String name,
			List<BluetoothGattCharacteristic> gattCharacteristics,
			BluetoothLeService mBluetoothLeService, byte[] value) {
		BluetoothGattCharacteristic gattCharacteristic = findCharacteristic(
				enableUuid, gattCharacteristics);
		if (gattCharacteristic != null) {
			Log.d(TAG, "Write " + name);
			gattCharacteristic.setValue(value);
			gattCharacteristic
					.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
			mBluetoothLeService.writeCharacteristic(gattCharacteristic);
		}
	}

	public static BluetoothGattCharacteristic findCharacteristic(UUID uuid,
			List<BluetoothGattCharacteristic> gattCharacteristics) {
		if (gattCharacteristics != null && gattCharacteristics.size() > 0) {
			for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
				if (gattCharacteristic != null) {
					if (gattCharacteristic.getUuid().equals(uuid)) {
						return gattCharacteristic;
					}
				}
			}
		}
		return null;
	}

	public static BluetoothGattService findService(UUID uuid,
			List<BluetoothGattService> gattServices) {
		if (gattServices == null)
			return null;
		for (BluetoothGattService gattService : gattServices) {
			if (uuid.equals(gattService.getUuid())) {
				return gattService;
			}
		}
		return null;
	}

	final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();

	public static String bytesToHex(byte[] bytes) {
		char[] hexChars = new char[bytes.length * 2];
		for (int j = 0; j < bytes.length; j++) {
			int v = bytes[j] & 0xFF;
			hexChars[j * 2] = hexArray[v >>> 4];
			hexChars[j * 2 + 1] = hexArray[v & 0x0F];
		}
		return new String(hexChars);
	}
}