NullPointerException

[joggiman]

Hey there,

I would like to apologize in advance for my bad English.

I want to use your EvDev for my Java-Project on a RaspberryPI 3 with Raspbian (64-bit). Until now everything works fine, but now I have a big problem:

I'm using two keyboards (Keyboard A and B) and I want to seperate them and check their Inputs.

Keyboard A has following files in /dev/input:

Keyboard A /dev/input/event0 /dev/input/event1 /dev/input/by-path/platform-3f980000.usb-usb-0:1.4:1.2-event-kbd

Keyboard B /dev/input/event2 /dev/input/event3 /dev/input/by-path/platform-3f980000.usb-usb-0:1.5:1.2-event-kbd

For example I will only use Keyboard A but I get the same problems with Keyboard B. If I'm using...as String fn... event0 -> I can typeIn from the Keyboard but nothing happens. event1 -> I can typeIn and e returns 3-times null by-path -> I can typeIn and java returns an NullPointerException in EventDevice.java (see Code below): Exception in thread "Thread-0" java.lang.NullPointerException at Test$1.event(Test.java:29) at com.dgis.input.evdev.EventDevice.distributeEvent(EventDevice.java:256) at com.dgis.input.evdev.EventDevice.access$2(EventDevice.java:253) at com.dgis.input.evdev.EventDevice$1.run(EventDevice.java:201)

I don't know what I can do to solve this problem. If you need any further information please tell me and I will post it.

Thanks in advance for your help. Greetings JoGGi

[gehel]

Honestly, this is very much a side project, that I'm doing for fun and that I have not touched for a very long time. Not sure I will be able to help you...

That being said, could you send a code sample reproducing the issue? I'll try to have a look...

[joggiman]

`import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader;

import com.dgis.input.evdev.EventDevice; import com.dgis.input.evdev.InputEvent; import com.dgis.input.evdev.InputListener;

public class Test {

/**
 * @param args
 * @throws IOException 
 */
public static void main(String[] args) throws IOException {
	// TODO Auto-generated method stub
	new Test(args[0]);
}

public Test(String fn) throws IOException{
	System.out.println("Erstelle EventDevice!");

// EventDevice dev = new EventDevice("/dev/input/by-path/platform-3f980000.usb-usb-0:1.4:1.2-event-kbd"); // EventDevice dev = new EventDevice("/dev/input/event1"); // EventDevice dev = new EventDevice("/dev/input/by-id/usb-Logitech_USB_Receiver-if02-event-kbd"); EventDevice dev = new EventDevice("/dev/input/event0"); System.out.println("Erfolgreich!\n");

	System.out.println("Gebe Version aus!");
	System.out.println("Version: " + dev.getEvdevVersion());
	System.out.println("Erfolgreich!\n");
	
	System.out.println("Gebe KeboardInfos aus!");
	System.out.println("KeyboardID: " + dev.getBusID());
	System.out.println("KeyboardName: " + dev.getDeviceName());
	System.out.println("Eroflgreich!\n");
	
	System.out.println("Erstelle KeyListener!");
	dev.addListener(new InputListener() {
		public void event(InputEvent e) {
			System.out.println("KeyCode: " +e.code);
		}
	});
	System.out.println("Erfolgreich!\n");
	
	System.out.println("Frage Taste ab!");
	new BufferedReader(new InputStreamReader(System.in)).readLine();
	System.out.println("Erfolgreich!\n");
	
	System.out.println("Schließe EventDevice!");
	dev.close();
	System.out.println("Erfolgreich!\n");
	
	System.out.println("Beende Programm!");
}

} `

This is the latest Code I tried. Every Sysout ist for Check...sry for german. Do you need anything else?

Thank you very much!

[gehel]

I have no idea what goes wrong here... I suspect that the native code is only IA-64 compatible and fails on ARM (I have never tried to run it on a Raspberry).

[Wickapps]

Good job on this Java wrapper. I am using the adjustments to STRUCT_SIZE_BYTES and the PARSE function suggested in ISSUE #1 and the Wireless USB keypad on Rasberry PI 3b is working well. Thanks!