Android：基于ibeacon实现蓝牙考勤

说明：

ibeacon设备会主动发射蓝牙信号，当手机打开蓝牙靠近ibeacon设备时，就会收到设备发送的蓝牙信号，这时只需要根据ibeacon设备的uuid、major、minor、mac这四个值，就可以确认是哪一台ibeacon设备，然后调用服务端考勤接口(ibeacon设备只为了确认手机在考勤机边上，不需要发送考勤数据到ibeacon设备上)，即可实现蓝牙考勤。

一、添加静态权限(在AndroidManifest.xml文件中添加，需要蓝牙和定位权限)：

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH" />

二、检测与开启蓝牙、GPS：

1.是否支持蓝牙：

        if (!context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
            ToastUtils.show("本机不支持蓝牙功能, 无法蓝牙打卡");
            ((Activity) context).finish();
            return false;
        }
        final BluetoothManager bm = (BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
            mBleAdapter = bm.getAdapter(); //mBleAdapter为全局变量，为BluetoothAdapter对象
        }
        if (bleAdapter == null) {
            ToastUtils.show("本机不支持低功耗蓝牙功能, 无法蓝牙打卡");
            ((Activity) context).finish();
            return false;
        }
        return true;

2.是否开启GPS：

LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
boolean gps = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
boolean network = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (gps || network) {
     return true;
}
return false;

3.开启GPS：

Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivityForResult(intent, ActivityCode.ACTIVITY_CODE_GPS);

4.开启蓝牙：

Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
((Activity) mContext).startActivityForResult(enableBtIntent, ActivityCode.ACTIVITY_CODE_OPEN_BLE);

三、动态申请蓝牙权限：

    private boolean check(Context context, String permission) {
        return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;

    }

    /**
     * 权限申请
     */
    private void searchBle(){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (!check(mContext, Manifest.permission.ACCESS_FINE_LOCATION) || !check(mContext, Manifest.permission.ACCESS_COARSE_LOCATION)) {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, ACCESS_LOCATION);
            } else {
                //执行蓝牙搜索
            }
        } else {
            //执行蓝牙搜索
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case ACCESS_LOCATION:
                if (hasAllPermissionsGranted(grantResults)) {
                    //执行蓝牙搜索
                } else {
                    ToastUtils.show("请开启权限");
                }
                break;
        }
    }

四.搜索蓝牙：

    /**
     * 搜索蓝牙
     */
    public void searchBle() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
            mBleAdapter.startLeScan(mLeScanCallback);
        }
    }

    /**
     * 搜索结果回调
     */
    private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {

        @Override
        public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
            //fromScanData方法将ibeacon数据转换为实体对象，内部包括了uuid、major、minor、mac、distance等信息
            final BleUtil.DeviceInfo info = BleUtil.fromScanData(device, rssi, scanRecord);
            if (info == null || TextUtils.isEmpty(info.uuid) || info.major <= 0 || info.minor <= 0 || TextUtils.isEmpty(info.mac)) {
                return;
            }
            if (mUuids == null || mUuids.isEmpty()) {
                //此处关闭蓝牙搜索
                mBleAdapter.stopLeScan(mLeScanCallback);
                return;
            }
            for (MachineInfo machineInfo : mUuids) {
                if (info.uuid.equalsIgnoreCase(machineInfo.uuid) &&
                        (!TextUtils.isEmpty(machineInfo.major) && info.major == Integer.parseInt(machineInfo.major)) &&
                        (!TextUtils.isEmpty(machineInfo.minor) && info.minor == Integer.parseInt(machineInfo.minor)) &&
                        info.mac.equalsIgnoreCase(machineInfo.mac) && info.distance <= MAX_DISTANCE) {
                    mConnected = true;
                    //回调通知外部，界面更新可考勤状态
                    if (mListener != null) {
                        mListener.onConnected();
                    }
                    //此处是延时调用stopLeScan关闭蓝牙搜索
                    beginTimer();
                    break;
                }
            }
        }
    };

五、考勤：

此步调用服务端提供的API增加考勤记录