我想知道BLE gatt设置的完成时间（如回调）

Question

我英语不好。敬请谅解。我想知道蓝牙设置何时完成。我想在蓝牙连接和设置完成后将数据发送到我的设备。我如何知道流打开何时完成？当我尝试所有 BLE 设置时，我只是睡了几秒钟，但我想将其更改为顺序代码。private class GattClientCallback extends BluetoothGattCallback {@Override        public void onServicesDiscovered( BluetoothGatt _gatt, int _status ) {            super.onServicesDiscovered( _gatt, _status );            // check if the discovery failed            if( _status != BluetoothGatt.GATT_SUCCESS ) {                Log.e( TAG, "Device service discovery failed, status: " + _status );                return;            }            // find discovered characteristics            List<BluetoothGattCharacteristic> matching_characteristics= BluetoothUtils.findBLECharacteristics(_gatt);            if( matching_characteristics.isEmpty() ) {                Log.e( TAG, "Unable to find characteristics" );                return;            }            // log for successful discovery            Log.d( TAG, "Services discovery is successful" );            // find command characteristics from the GATT server            cmd_characteristic= BluetoothUtils.findCommandCharacteristic( ble_gatt_ );            //setCharacteristicNotification            ble_gatt_.setCharacteristicNotification(cmd_characteristic, true);            BluetoothGattDescriptor descriptor = cmd_characteristic.getDescriptor(CHARACTERISTIC_UPDATE_NOTIFICATION_DESCRIPTOR_UUID);            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);            ble_gatt_.writeDescriptor(descriptor); //descriptor write operation successfully started?            // stream open complete.            // update the connection status message            msg_handler(SET_TV_STATUS,"connection complete");        }}

Answer 1

您可以实现 onConnectionStateChange。这会让您知道连接是否成功。

@Override

public void onConnectionStateChange(BluetoothGatt gatt, int status,int newState) {

    if (newState == BluetoothProfile.STATE_CONNECTED) {

      // you can send data here

    } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {

    }

}