How to disconnect A2DP profile Bluetooth Connection?

I am working on A2DP connection with headset and other Bluetooth device but when I connect Bluetooth device but when I Disconnect but It didn't disconnect with it. My code is:

try {    
    Method connect = mA2dpService.getClass().getDeclaredMethod("disconnect", BluetoothDevice.class);
    connect.invoke(device);
} catch (Exception e) {
     e.printStackTrace();
}