我可以通过startLeScan
或通过新的getBluetoothLeScanner
扫描蓝牙LE设备,并且工作正常。但是,即使继续扫描,也永远不会两次检测到同一设备。不幸的是,当信标的rssi更改时,我想接收事件。 Android是否支持该功能?
最佳答案
实现BluetoothGattCallback
并覆盖onReadRemoteRssi
方法。
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
if (newState == BluetoothProfile.STATE_CONNECTED) {
broadcastUpdate(intentAction);
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
broadcastUpdate(intentAction);
}
}
@Override
public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) {
super.onReadRemoteRssi(gatt, rssi, status);
// use rssi value here
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
};