蓝牙通信代码片段记录
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
public class MassageFragment extends BaseBleFragment {
private int selectPosition=5;//选中档位默认5
private String addressDev;
boolean openOrClose = false;
private boolean isOpenClicked;//用作设备无响应提示
private OpenBleHelper mOpenBleHelper;
private static MyUIHandler mUIHandler;
private static class MyUIHandler extends UIHandler<MassageFragment> {
MyUIHandler(MassageFragment cls) {
super(cls);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
MassageFragment activity = ref.get();
if (activity != null) {
if (activity.getActivity()!=null&&activity.getActivity().isFinishing()) return;
switch (msg.what) {
case 0:
//8秒后，未搜索到设备，重试
if(!LinkState.getInstance().getState()){
BluetoothLeService.ME.close();
activity.bleModel.connectDevice(activity.addressDev);
}
break;
case 1:
activity.initBleComponent(activity.addressDev);//用于写数据
break;
}
}
}
}
@Override
protected void initView(View view) {
listenBroadcastBle();//监听蓝牙状态切换，重新连接蓝牙设备
if(getArguments()!=null){//获取蓝牙data
String bleData = getArguments().getString("bleData");
addressDev = getArguments().getString("addressDev");
if(bleData !=null && addressDev!=null){
showData(bleData);
mUIHandler.sendEmptyMessageDelayed(1,500);//延迟500毫秒
} else {//此时是，有缓存的情况。在此我们判断蓝牙状态，开启服务，根据缓存的address，连接设备
addressDev = SharePerferenceHelper.createSharePerference("private").getString("address","");
initBleComponent(addressDev);//用于写数据
if (mOpenBleHelper.isBleEnable()) {
bleModel.connectDevice(addressDev);
mUIHandler.sendEmptyMessageDelayed(0,8*1000);//8秒后重试
}
}
}
WaveView_top_left.setDrawProcessText(false);
WaveView_top_right.setDrawProcessText(false);
WaveView_bottom_left.setDrawProcessText(false);
WaveView_bottom_right.setDrawProcessText(false);
//取缓存的档位设置到控件中
int degreeProgress = SharePerferenceHelper.createSharePerference("private").getInt("massageDegree",5);
seekBar.setProgress(degreeProgress);
seekBar.setEnabled(false);
}
private void listenBroadcastBle() {
mOpenBleHelper = new OpenBleHelper(getActivity());
if (!mOpenBleHelper.isBleEnable()) {
mOpenBleHelper.setListener(bleStatusChangedListener);
}
}
OpenBleHelper.OnBleStatusChangedListener bleStatusChangedListener = new OpenBleHelper.OnBleStatusChangedListener() {
@Override
public void onBleOpened() {
mOpenBleHelper.setListener(null);
bleModel.connectDevice(addressDev);//连接蓝牙设备
mUIHandler.sendEmptyMessageDelayed(0,8*1000);//8秒后重试
}
@Override
public void onBleClosed() {
toast(getStringByResource(R.string.not_check_ble_open));
}
@Override
public void onUnSupportBle() {
mOpenBleHelper.setListener(null);
toast(getStringByResource(R.string.unsupport_ble));
}
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = super.onCreateView(inflater, container, savedInstanceState);
unbinder = ButterKnife.bind(this, rootView);
seekBar.setOnSeekChangeListener(new OnSeekChangeListener() {
@Override
public void onSeeking(SeekParams seekParams) {
selectPosition = seekParams.thumbPosition+1;
}
@Override
public void onStartTrackingTouch(IndicatorSeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(IndicatorSeekBar seekBar) {
//在此处做一个判断，提交数据,设置档位值
changeGearPosition(selectPosition);
}
});
return rootView;
}
//写数据得到回调
@Override
public void showData(String data, String address) {
super.showData(data, address);
showData(data);//得到通知
//有数据返回说明连接成功
LinkState.getInstance().setState(true);
//通知mainActivity更新状态图片
EventBus.getDefault().post(new StateImgEvent(true));
}
@Subscribe(threadMode = ThreadMode.MAIN)
public void onEvent(MassageEvent event) {
if(seekBar!=null) {
seekBar.showIndicator(event.getSelected());
}
if (event.getSelected()) {
initBleComponent(addressDev);//重复监听
}
}
//实现与腰部支撑的互斥
@Subscribe(threadMode = ThreadMode.MAIN)
public void onEvent(MassageOrLumbarMassageEvent event) {
if(!event.isMassage() && openOrClose){
openOrClose = false;
TextView_enter.setSelected(false);
TextView_enter.setText("开始");
stopAnimation();
seekBar.setEnabled(openOrClose);
}
}
//删除设备，断开连接的通知
@Subscribe(threadMode = ThreadMode.MAIN)
public void onEvent(BleDisconnectEvent event) {
bleModel.disconnectDevice(addressDev);
bleModel.releaseActivity();
bleModel.finish();
}
@OnClick({R.id.TextView_enter})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.TextView_enter:
//设置开关状态
massageOpenClose();
break;
}
}
//解析蓝牙数据,并赋值给view
public void showData(String data) {
byte[] dataByte = ConvertUtils.hexStringToBytes(data);
if (dataByte[0] == 0x55 && dataByte[1] == 0x01) {
//设置按摩开关状态
if (dataByte[2] == 0x01) {
openOrClose = true;
TextView_enter.setSelected(true);
TextView_enter.setText("关闭");
startAnimation();
} else {
openOrClose = false;
TextView_enter.setSelected(false);
TextView_enter.setText("开始");
stopAnimation();
}
//通知service当前状态改变了
EventBus.getDefault().post(new MassageOpenEvent(dataByte[2] == 0x01));
//设置档位值
int pro;
if(dataByte[3]==10){
pro = 100;
}else{
pro = dataByte[3]*10-10;
}
//缓存档位值在sp中
SharePerferenceHelper.createSharePerference("private").putInt("massageDegree",pro);
selectPosition = dataByte[3];
seekBar.setProgress(pro);
//开关未打开时，换挡控件是禁用的。
seekBar.setEnabled(openOrClose);
}
//收到多次蓝牙数据，第二次的数据传递给腰部支撑fragment
if(dataByte[0] == 0x55 && dataByte[1] == 0x03){
EventBus.getDefault().post(new BleDataEvent(data));
}
//收到多次蓝牙数据，第三次的数据传递给加热fragment
if(dataByte[0] == 0x55 && dataByte[1] == 0x05){
EventBus.getDefault().post(new BleHeatingDataEvent(data));
}
//收到多次蓝牙数据，第四次的数据传递给通风fragment
if(dataByte[0] == 0x55 && dataByte[1] == 0x06){
EventBus.getDefault().post(new BleVentilationDataEvent(data));
}
isOpenClicked=false;
}
public void massageOpenClose() {
openOrClose=!openOrClose;
byte[] warmParams = new byte[5];
warmParams[0] = 0x55;
warmParams[1] = 0x01;
if (openOrClose) {//开始
warmParams[2] = 0x01;
EventBus.getDefault().post(new MassageOrLumbarLumbarEvent(true));//通知腰部支撑页
} else {//停止
warmParams[2] = 0x00;
}
warmParams[3] = (byte) selectPosition;
String str = HexDump.getBCC(warmParams);
Integer in = Integer.valueOf(str,16);
warmParams[4] = (byte) (int) in;
// byte[] sendData = ConvertUtils.getXORData(warmParams);
// if (sendData == null) return;
blePresenter.writeData(warmParams, addressDev,true);
isOpenClicked = true;
//添加设备无响应的提示
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
if(isOpenClicked){
ToastUtils.makeText("设备无响应。");
openOrClose=!openOrClose;
}
}
},2000);
}
public void changeGearPosition(int position) {
byte[] warmParams = new byte[5];
warmParams[0] = 0x55;
warmParams[1] = 0x02;
warmParams[2] = 0x01;
warmParams[3] = (byte) (position);
String str = HexDump.getBCC(warmParams);
Integer in = Integer.valueOf(str,16);
warmParams[4] = (byte) (int) in;
byte[] sendData = ConvertUtils.getXORData(warmParams);
if (sendData == null) return;
blePresenter.writeData(sendData, addressDev,true);
}
private void startAnimation() {
WaveView_top_left.setProgressWithAnim(1, 12000);
WaveView_top_right.setProgressWithAnim(1, 12000);
WaveView_bottom_left.setProgressWithAnim(1, 12000);
WaveView_bottom_right.setProgressWithAnim(1, 12000);
}
private void stopAnimation() {
WaveView_top_left.setAnimationStop();
WaveView_top_right.setAnimationStop();
WaveView_bottom_left.setAnimationStop();
WaveView_bottom_right.setAnimationStop();
}
}
OpenBleHelper.java
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
public class OpenBleHelper {
private static final String TAG = "OpenBleHelper";
private static final boolean DEBUG = true;
private static final int REQUEST_CODE_ENABLE_BLE = 0X330;
private static final int ON_REQUEST_OPEN_BLE_DELAY_CHECK = 6 * 1000;
private FragmentActivity mActivity;
private BleHelperFragment mBleHelperFragment;
private BluetoothAdapter bluetoothAdapter;
private BleStatusBroadCastReciver mReciver;
private OnBleStatusChangedListener mListener;
private Handler mMainHandler;
public OpenBleHelper(FragmentActivity activity) {
mActivity = activity;
init();
}
private void init() {
mBleHelperFragment = getBleFragment(mActivity);
mBleHelperFragment.setBleHelper(this);
BluetoothManager bluetoothManager = (BluetoothManager) mActivity.getApplicationContext()
.getSystemService(Context.BLUETOOTH_SERVICE);
bluetoothAdapter = bluetoothManager.getAdapter();
mReciver = new BleStatusBroadCastReciver(mActivity, this);
mReciver.regiseter();
mMainHandler = new Handler();
}
private BleHelperFragment getBleFragment(FragmentActivity activity) {
FragmentManager fragmentManager = activity.getSupportFragmentManager();
BleHelperFragment fragment = (BleHelperFragment) fragmentManager.findFragmentByTag(BleHelperFragment.TAG);
if (fragment == null) {
fragment = new BleHelperFragment();
fragmentManager.beginTransaction().add(fragment, BleHelperFragment.TAG).commit();
}
return fragment;
}
public void setListener(OnBleStatusChangedListener listener) {
mListener = listener;
}
/**
* 开启蓝牙
*/
public void openBle() {
if (isSupportBle()) {
if (isBleEnable()) {
dispatchOnBleOpened();
} else {
requestOpenBle();
}
} else {
dispatchUnSupportBle();
}
}
/**
* 判断当前是否支持蓝牙
*/
public boolean isSupportBle() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2
&& mActivity.getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE);
}
/**
* 判断蓝牙是否已开启
*/
public boolean isBleEnable() {
if (bluetoothAdapter != null) {
return bluetoothAdapter.isEnabled();
}
return false;
}
//通过intent的方式去请求开启蓝牙
private void requestOpenBle() {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (isIntentAvailable(mActivity, intent)) {
mBleHelperFragment.startActivityForResult(intent, REQUEST_CODE_ENABLE_BLE);
} else {
dispatchOnBleClosed();
}
}
//检测Intent 是否有效
private boolean isIntentAvailable(Context context, Intent intent) {
if (context == null) {
return false;
}
PackageManager pm = context.getPackageManager();
List<ResolveInfo> resolves = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
return resolves != null && !resolves.isEmpty();
}
//主线程中传递蓝牙已开启回调
private void dispatchOnBleOpened() {
if (mListener != null && mMainHandler != null) {
mMainHandler.post(new Runnable() {
@Override
public void run() {
mListener.onBleOpened();
}
});
}
}
//主线程中传递蓝牙已关闭回调
private void dispatchOnBleClosed() {
if (mListener != null && mMainHandler != null) {
mMainHandler.post(new Runnable() {
@Override
public void run() {
mListener.onBleClosed();
}
});
}
}
//主线程中传递不支持蓝牙
private void dispatchUnSupportBle() {
if (mListener != null && mMainHandler != null) {
mMainHandler.post(new Runnable() {
@Override
public void run() {
mListener.onUnSupportBle();
}
});
}
}
/**
* 系统弹窗申请开启蓝牙之后，延时一段时间检查蓝牙的开启状态，避免用户点击拒绝而无响应
*/
private void onRequestResultDelayCheckBleStatus() {
if (mMainHandler != null) {
mMainHandler.removeCallbacksAndMessages(null);
mMainHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (isBleEnable()) {
dispatchOnBleOpened();
} else {
dispatchOnBleClosed();
}
}
}, ON_REQUEST_OPEN_BLE_DELAY_CHECK);
}
}
/**
* 移除延迟检测
*/
private void removeOnRequestResultDelayCheckBleStatus() {
if (mMainHandler != null) {
mMainHandler.removeCallbacksAndMessages(null);
}
}
/**
* 会自动释放
*/
protected void release() {
if (mBleHelperFragment != null) {
mBleHelperFragment.release();
mBleHelperFragment = null;
}
if (mReciver != null) {
mReciver.release();
mReciver = null;
}
if (mMainHandler != null) {
mMainHandler.removeCallbacksAndMessages(null);
mMainHandler = null;
}
mListener = null;
bluetoothAdapter = null;
mActivity = null;
}
@SuppressLint("ValidFragment")
public static class BleHelperFragment extends Fragment {
private static final String TAG = "com.lib.fast.helper.OpenBleHelper.BleHelperFragment";
OpenBleHelper mBleHelper;
private void setBleHelper(OpenBleHelper helper) {
mBleHelper = helper;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_ENABLE_BLE) {
d("use request open ble, activity result");
mBleHelper.onRequestResultDelayCheckBleStatus();
}
}
private void release() {
mBleHelper = null;
}
@Override
public void onDestroy() {
super.onDestroy();
mBleHelper.release();
}
}
//监听蓝牙开启状态广播
private class BleStatusBroadCastReciver extends BroadcastReceiver {
private Context mContext;
private OpenBleHelper mOpenBleHelper;
private boolean isRegisted;
private String[] boradcasts = new String[]{BluetoothAdapter.ACTION_STATE_CHANGED};
private BleStatusBroadCastReciver(Context context, OpenBleHelper openBleHelper) {
mContext = context.getApplicationContext();
mOpenBleHelper = openBleHelper;
}
public void regiseter() {
if (!isRegisted) {
IntentFilter intentFilter = new IntentFilter();
for (String action : boradcasts) {
intentFilter.addAction(action);
}
mContext.registerReceiver(this, intentFilter);
isRegisted = true;
}
}
public void unRegister() {
if (isRegisted) {
mContext.unregisterReceiver(this);
isRegisted = false;
}
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
mOpenBleHelper.removeOnRequestResultDelayCheckBleStatus();
int bleStatus = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.STATE_OFF);
if (bleStatus == BluetoothAdapter.STATE_ON) {
mOpenBleHelper.dispatchOnBleOpened();
} else if (bleStatus == BluetoothAdapter.STATE_OFF) {
mOpenBleHelper.dispatchOnBleClosed();
}
}
}
public void release() {
unRegister();
mOpenBleHelper = null;
mContext = null;
}
}
private static void d(String msg, Object... args) {
if (DEBUG) {
Log.d(TAG, String.format(msg, args));
}
}
public interface OnBleStatusChangedListener {
/**
* 蓝牙已开启
*/
void onBleOpened();
/**
* 蓝牙已关闭或者开启失败
*/
void onBleClosed();
void onUnSupportBle();
}
}
HexDump.java
/**
* Clone of Android's HexDump class, for use in debugging. Cosmetic changes
* only.十六进制数据操作
*/
public class HexDump {
private final static char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5',
'6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
/**
* 转换为字符串
*/
public static String dumpHexString(byte[] array) {
return dumpHexString(array, 0, array.length);
}
/**
* 转换为字符串
*/
public static String dumpHexString(byte[] array, int offset, int length) {
return bytesToHexFun1(array, offset, length);
}
/**
* 格式化数组输出
*/
public static String toHexString(byte b) {
return toHexString(toByteArray(b));
}
/**
* 格式化数组输出
*/
public static String toHexString(byte[] array) {
return toHexString(array, 0, array.length);
}
/**格式化数组输出*/
public static String toHexString(byte[] array, int offset, int length) {
return bytesToHexFun2(array, offset, length);
}
private static String byteToHexFun3(byte[] array, int offset, int length) {
StringBuilder result = new StringBuilder();
byte[] line = new byte[16];
int lineIndex = 0;
result.append("0x");
result.append(toHexString(offset));
for (int i = offset; i < offset + length; i++) {
if (lineIndex == 16) {
result.append(" ");
for (int j = 0; j < 16; j++) {
if (line[j] > ' ' && line[j] < '~') {
result.append(new String(line, j, 1));
} else {
result.append(".");
}
}
result.append("\n0x");
result.append(toHexString(i));
lineIndex = 0;
}
byte b = array[i];
result.append(" ");
result.append(HEX_DIGITS[(b >>> 4) & 0x0F]);
result.append(HEX_DIGITS[b & 0x0F]);
line[lineIndex++] = b;
}
if (lineIndex != 16) {
int count = (16 - lineIndex) * 3;
count++;
for (int i = 0; i < count; i++) {
result.append(" ");
}
for (int i = 0; i < lineIndex; i++) {
if (line[i] > ' ' && line[i] < '~') {
result.append(new String(line, i, 1));
} else {
result.append(".");
}
}
}
return result.toString();
}
private static String bytesToHexFun1(byte[] array, int offset, int length) {
char[] buf = new char[length * 2];
int bufIndex = 0;
for (int i = offset; i < offset + length; i++) {
byte b = array[i];
buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F];
buf[bufIndex++] = HEX_DIGITS[b & 0x0F];
}
return new String(buf);
}
/**
* byte[] to hex string
*
* @param bytes
* @return
*/
private static String bytesToHexFun2(byte[] bytes, int offset, int length) {
StringBuffer buf = new StringBuffer();
buf.append("[ ");
for (int i = offset; i < offset + length; i++) {
byte b = bytes[i];
buf.append(String.format("%02x ", new Integer(b & 0xff)).toUpperCase());
if ((i - offset + 1) % 4 == 0) {
buf.append(" ");
}
}
buf.append("]");
return buf.toString();
}
public static String toHexString(int i) {
return toHexString(toByteArray(i));
}
public static String toHexString(short i) {
return toHexString(toByteArray(i));
}
public static byte[] toByteArray(byte b) {
byte[] array = new byte[1];
array[0] = b;
return array;
}
public static byte[] toByteArray(int i) {
byte[] array = new byte[4];
array[3] = (byte) (i & 0xFF);
array[2] = (byte) ((i >> 8) & 0xFF);
array[1] = (byte) ((i >> 16) & 0xFF);
array[0] = (byte) ((i >> 24) & 0xFF);
return array;
}
public static byte[] shortToByteArray(short s) {
byte[] array = new byte[]{(byte) s};
return array;
}
public static byte intToByte(int i) {
byte b = (byte) i;
return b;
}
public static byte[] toByteArray(short i) {
byte[] array = new byte[2];
array[1] = (byte) (i & 0xFF);
array[0] = (byte) ((i >> 8) & 0xFF);
return array;
}
private static int toByte(char c) {
if (c >= '0' && c <= '9')
return (c - '0');
if (c >= 'A' && c <= 'F')
return (c - 'A' + 10);
if (c >= 'a' && c <= 'f')
return (c - 'a' + 10);
throw new RuntimeException("Invalid hex char '" + c + "'");
}
public static byte[] hexStringToByteArray(String hexString) {
int length = hexString.length();
byte[] buffer = new byte[length / 2];
for (int i = 0; i < length; i += 2) {
buffer[i / 2] = (byte) ((toByte(hexString.charAt(i)) << 4) | toByte(hexString
.charAt(i + 1)));
}
return buffer;
}
/**
* 手机号码验证
*
* @param mobiles
* @return
*/
public static boolean isMobileNO(String mobiles) {
// Pattern p = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$");
Pattern p = Pattern.compile("^1[3|4|5|8][0-9]\\d{8}$");
Matcher m = p.matcher(mobiles);
return m.matches();
}
/**
* md5加密方法
*
* @param info 密码源
* @return
*/
public static String getMD5(String info) {
try {
MessageDigest md5 = MessageDigest.getInstance("MD5");
md5.update(info.getBytes("UTF-8"));
byte[] encryption = md5.digest();
StringBuffer strBuf = new StringBuffer();
for (int i = 0; i < encryption.length; i++) {
if (Integer.toHexString(0xff & encryption[i]).length() == 1) {
strBuf.append("0").append(Integer.toHexString(0xff & encryption[i]));
} else {
strBuf.append(Integer.toHexString(0xff & encryption[i]));
}
}
return strBuf.toString();
} catch (NoSuchAlgorithmException e) {
return "";
} catch (UnsupportedEncodingException e) {
return "";
}
}
/**
* 异或和
*/
private static final char[] bcdLookup = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
private static final int REQUEST_CONNECT_DEVICE = 1;
private static final int REQUEST_ENABLE_BT = 2;
public static final int MESSAGE_DEVICE_NAME = 4;
public static String XORAnd(byte[] bytes) {
int str = 0;
for (int i = 0; i < bytes.length; i++) {
str ^= Integer.valueOf((bcdLookup[(bytes[i] >>> MESSAGE_DEVICE_NAME) & 15] + "" + bcdLookup[bytes[i] & 15] + ""), 16);
}
return Integer.toHexString(str);
}
/**
* 比较两个byte[]时候一致
*/
public static boolean bytesEquals(byte[] bs1, byte[] bs2) {
if (bs1 == null || bs2 == null || bs1.length != bs2.length) return false;
if (bs1.length == 0 && bs1.length == bs2.length) return true;
for (int i = 0; i < bs1.length; i++) {
if (bs1[i] != bs2[i]) return false;
}
return true;
}
public static boolean bytesStartWith(byte[] fromBytes, byte[] toBytes) {
if (fromBytes == null || toBytes == null || fromBytes.length < toBytes.length) return false;
for (int i = 0; i < toBytes.length; i++) {
if (fromBytes[i] != toBytes[i]) return false;
}
return true;
}
public static boolean bytesEndWith(byte[] fromBytes, byte[] toBytes) {
if (fromBytes == null || toBytes == null || fromBytes.length < toBytes.length) return false;
for (int i = 1; i <= toBytes.length; i++) {
if (fromBytes[fromBytes.length - i] != toBytes[toBytes.length - i]) return false;
}
return true;
}
/**
* 获取高四位
*/
public static int getHeight4(byte data) {
int height;
height = ((data & 0xf0) >> 4);
return height;
}
/**
* 获取低四位
*/
public static int getLow4(byte data) {
int low;
low = (data & 0x0f);
return low;
}
public static String getBCC(byte[] data) {
try{
String ret = "";
byte BCC[]= new byte[1];
for(int i=0;i<data.length;i++)
{
BCC[0]=(byte) (BCC[0] ^ data[i]);
}
String hex = Integer.toHexString(BCC[0] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
ret += hex.toUpperCase();
return ret;
} catch(Exception e){
e.printStackTrace();
return "";
}
}
/**
* bytes字符串转换为Byte值
* @param src Byte字符串，每个Byte之间没有分隔符
* @return byte[]
*/
public static byte[] hexStr2Bytes(String src)
{
int m=0,n=0;
int l=src.length()/2;
System.out.println(l);
byte[] ret = new byte[l];
for (int i = 0; i < l; i++)
{
m=i*2+1;
n=m+1;
ret[i] = Byte.decode("0x" + src.substring(i*2, m) + src.substring(m,n));
}
return ret;
}
}
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