android BLE 扫描BLE设备 BluetoothLeScanner
http://a1anwang.com/post-37.html
android BLE Peripheral 手机模拟设备发出BLE广播 BluetoothLeAdvertiser
http://a1anwang.com/post-36.html
Android蓝牙开发手册
https://developer.android.google.cn/guide/topics/connectivity/bluetooth#ManagingAConnection
Android蓝牙开发API
https://developer.android.google.cn/reference/android/bluetooth/le/BluetoothLeScanner#startScan(java.util.List<android.bluetooth.le.ScanFilter>,%20android.bluetooth.le.ScanSettings,%20android.app.PendingIntent)
Android官方sample
https://developer.android.google.cn/samples/
Android与蓝牙Ble之间的通信，包括adapter device gatt等知识点
https://www.cnblogs.com/xxzjyf/p/x_x_z_j_y_f.html#3862764