C# AndroidJavaObject.IsNull方法代码示例

        /// <summary>
        /// Initializes <see cref="AndroidBluetoothMultiplayer"/> class.
        /// Retrieves a pointer to the Java plugin object.
        /// Initalizes the singleton instance on the first usage of the class.
        /// </summary>
        static AndroidBluetoothMultiplayer() {
            _plugin = null;
            _isPluginAvailable = false;

            try {
                UpdateInstance();
            } catch {
                // Happens when this static constructor is called from a GameObject being created.
                // Just ignoring, as this is intended.
            }

#if !UNITY_EDITOR && UNITY_ANDROID
            // Retrieve BluetoothMediator singleton instance
            try {
                using (AndroidJavaClass mediatorClass = new AndroidJavaClass(kPluginClassName)) {
                    if (!mediatorClass.IsNull()) {
                        _plugin = mediatorClass.CallStatic<AndroidJavaObject>("getSingleton");
                        _isPluginAvailable = !_plugin.IsNull();
                    }
                }
            } catch {
                Debug.LogError("AndroidBluetoothMultiplayer initialization failed. Probably .jar not present?");
                throw;
            }
#endif
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="BluetoothDevice"/> class from the Java BluetoothDevice.
        /// </summary>
        /// <param name="bluetoothDeviceJavaObject">
        /// The Java object that is an instance of android.bluetooth.BluetoothDevice.
        /// </param>
        /// <exception cref="ArgumentNullException">
        /// Thrown if <paramref name="bluetoothDeviceJavaObject"/> is null.
        /// </exception>
        internal BluetoothDevice(AndroidJavaObject bluetoothDeviceJavaObject) {
            try {
                if (bluetoothDeviceJavaObject.IsNull()) {
                    throw new ArgumentNullException("bluetoothDeviceJavaObject");
                }

                Name = bluetoothDeviceJavaObject.Call<string>("getName").Trim();
                Address = bluetoothDeviceJavaObject.Call<string>("getAddress");
                BondState = (DeviceBondState) bluetoothDeviceJavaObject.Call<int>("getBondState");

                AndroidJavaObject deviceClassJavaObject = bluetoothDeviceJavaObject.Call<AndroidJavaObject>("getBluetoothClass");
                int deviceClassFull = deviceClassJavaObject.Call<int>("getDeviceClass");
                DeviceClass = (BluetoothDeviceClass.Class) deviceClassFull;
                DeviceMajorClass = DeviceClass.GetMajorClass();
                IsConnectable = DeviceClass.IsProbablyHandheldDataCapableDevice();

                if (Name == string.Empty) {
                    Name = Address;
                }
            } catch {
                Debug.LogError("Exception while converting BluetoothDevice");
                throw;
            }
        }

        /// <summary>
        /// Converts a Java Set of android.Bluetooth.BluetoothDevice into its C# representation.
        /// </summary>
        /// <param name="bluetoothDeviceJavaSet">The Java Set of android.Bluetooth.BluetoothDevice.</param>
        /// <returns>The converted <see cref="BluetoothDevice[]"/>.</returns>
        private static BluetoothDevice[] ConvertJavaBluetoothDeviceSet(AndroidJavaObject bluetoothDeviceJavaSet) {
            try {
                if (bluetoothDeviceJavaSet.IsNull())
                    return null;

                AndroidJavaObject[] deviceJavaArray = bluetoothDeviceJavaSet.Call<AndroidJavaObject[]>("toArray");
                BluetoothDevice[] deviceArray = new BluetoothDevice[deviceJavaArray.Length];
                for (int i = 0; i < deviceJavaArray.Length; i++) {
                    deviceArray[i] = new BluetoothDevice(deviceJavaArray[i]);
                }

                return deviceArray;
            } catch {
                Debug.LogError("Exception while converting BluetoothDevice Set");
                throw;
            }
        }