+static const char CLASSPATH_BT_PROFILE[] = "android/bluetooth/BluetoothProfile";
+static const char CLASSPATH_BT_GATT[] = "android/bluetooth/BluetoothGatt";
+static const char CLASSPATH_BT_ADAPTER[] = "android/bluetooth/BluetoothAdapter";
+static const char CLASSPATH_BT_DEVICE[] = "android/bluetooth/BluetoothDevice";
+static const char CLASSPATH_BT_UUID[] = "java/util/UUID";
+static const char CLASSPATH_LE_SCANNER[] = "android/bluetooth/le/BluetoothLeScanner";
+static const char CLASSPATH_LE_SCANSETTINGS[] = "android/bluetooth/le/ScanSettings";
+
+static const char METHODID_OBJECTNONPARAM[] = "()Landroid/bluetooth/BluetoothAdapter;";
+static const char METHODID_BT_DEVICE[] = "()Landroid/bluetooth/BluetoothDevice;";
+static const char METHODID_BT_REMOTE_DEVICE[] = "(Ljava/lang/String;)Landroid/bluetooth/BluetoothDevice;";
+
+static const jint GATT_PROFILE = 7;
+static const jint GATT_SUCCESS = 0;
+
+static const jint BOND_BONDED = 12;
+static const jint BOND_BONDING = 11;
+static const jint BOND_NONE = 10;
+
+static const uint16_t STATE_CONNECTED = 3;
+static const uint16_t STATE_SERVICE_CONNECTED = 2;
+static const uint16_t STATE_DISCONNECTED = 1;