Key steps in BLE programming

Get Permissions

<android:name= "Android.permission.BLUETOOTH"/><   android:name= "Android.permission.BLUETOOTH_ADMIN"/>

Get an instance of the Bluetooth adapter

Final Bluetoothmanager Bluetoothmanager =        = Bluetoothmanager.getadapter ();

BLE search: Instantiate callback function, start/stop scan

1. Instantiate callback function

PrivateBluetoothadapter.lescancallback Mlescancallback =NewBluetoothadapter.lescancallback () {@Override Public voidOnlescan (FinalBluetoothdevice device,intRssi,byte[] scanrecord) {Runonuithread (NewRunnable () {@Override Public voidrun () {//get a Bluetooth device instance           }       }); }};

2. Start/Stop Scan

Mbluetoothadapter.startlescan (mlescancallback);  // Start scanning mbluetoothadapter.stoplescan (mlescancallback);  // Stop Scanning

BLE connection: Instantiate callback function, connect and bind callback function

1. Instantiate callback function

Private FinalBluetoothgattcallback Mgattcallback =NewBluetoothgattcallback () {//triggers when the connection state changes@Override Public voidOnconnectionstatechange (Bluetoothgatt GATT,intstatus,intnewstate)            {String intentaction; if(NewState = =bluetoothprofile.state_connected) {                 //when the Bluetooth device is connected                 ...             } Else if(NewState = =bluetoothprofile.state_disconnected) {                 //when the device cannot connect                 ...            } }         //triggers when new services are discovered@Override Public voidOnservicesdiscovered (Bluetoothgatt GATT,intstatus) {            if(Status = =bluetoothgatt.gatt_success) {                ...            } Else {                ...            } }                  //read/write features@Override Public voidOncharacteristicread (Bluetoothgatt GATT, bluetoothgattcharacteristic characteristic, 
    intstatus) {            if(Status = =bluetoothgatt.gatt_success)        {                ...            } }     ...    };

2. Get the Bluetooth device instance and connect to the Bluetooth device instance.

 The Bluetooth address instantiates a Bluetooth device, or passes a reference through the above scan.  final bluetoothdevice device = mbluetoothadapter.getremotedevice (address);  
// three parameters involved: a context object, an auto-connect (Boolean value that indicates that the BLE device is automatically connected to it if it is available), and the Bluetoothgattcallback call.  Private Bluetoothgatt Mbluetoothgatt = Device.connectgatt (thisfalse, Mgattcallback) ;

Key steps in BLE programming