关于安卓6.0以上系统中无法搜索到蓝牙设备的问题

private BluetoothAdapter mBluetoothAdapter;//蓝牙适配器

mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//获取本地蓝牙适配器 

mBluetoothAdapter.startDiscovery();//搜索蓝牙

//AndroidManifest.XML中添加权限

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

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

//6.0后的需要继续添加两个权限

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