Java Question B4J: Error parsing libraries: .autowrite already exists?

[jmon]

Hello,

I am trying to convert this example to a library for B4J: http://ochafik.com/blog/?p=98

When I compile the library using the simple library compiler, I get no error, but when I load the library in B4J I get this error message in the IDE:

This is the java file:

package anywheresoftware.jmon.jWin32IdleTime;
import anywheresoftware.b4a.BA.Author;
import anywheresoftware.b4a.BA.DependsOn;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.sun.jna.*;
import com.sun.jna.win32.*;

/**
* Utility method to retrieve the idle time on Windows and sample code to test it.
* JNA shall be present in your classpath for this to work (and compile).
* @author ochafik
*/
@Version(1.0f)
@ShortName("jWin32IdleTime")
@DependsOn(values={"jna-3.4.0"})
public class Win32IdleTime {

    public interface Kernel32 extends StdCallLibrary {
        Kernel32 INSTANCE = (Kernel32)Native.loadLibrary("kernel32", Kernel32.class);

        /**
        * Retrieves the number of milliseconds that have elapsed since the system was started.
        * @see http://msdn2.microsoft.com/en-us/library/ms724408.aspx
        * @return number of milliseconds that have elapsed since the system was started.
        */
        public int GetTickCount();
    };

    public interface User32 extends StdCallLibrary {
        User32 INSTANCE = (User32)Native.loadLibrary("user32", User32.class);

        /**
        * Contains the time of the last input.
        * @see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputstructures/lastinputinfo.asp
        */
        public static class LASTINPUTINFO extends Structure {
            public int cbSize = 8;

            /// Tick count of when the last input event was received.
            public int dwTime;
        }

        /**
        * Retrieves the time of the last input event.
        * @see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/getlastinputinfo.asp
        * @return time of the last input event, in milliseconds
        */
        public boolean GetLastInputInfo(LASTINPUTINFO result);
    };

    /**
    * Get the amount of milliseconds that have elapsed since the last input event
    * (mouse or keyboard)
    * @return idle time in milliseconds
    */
    public static int getIdleTimeMillisWin32() {
        User32.LASTINPUTINFO lastInputInfo = new User32.LASTINPUTINFO();
        User32.INSTANCE.GetLastInputInfo(lastInputInfo);
        return Kernel32.INSTANCE.GetTickCount() - lastInputInfo.dwTime;
    }

}

(Note: I couldn't include in the zip file the jna-3.4.0.jar. You will have to download from here : http://mvnrepository.com/artifact/net.java.dev.jna/jna)

 

[Erel]

Add @Hide to all the types (interfaces in this case) that should not be exposed.

 

[jmon]

Add @Hide to all the types (interfaces in this case) that should not be exposed.

Thanks, it works. I also had to import "import anywheresoftware.b4a.BA.Hide;"

package anywheresoftware.jmon.jWin32IdleTime;
import anywheresoftware.b4a.BA.Author;
import anywheresoftware.b4a.BA.DependsOn;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;
import anywheresoftware.b4a.BA.Hide;
import anywheresoftware.b4a.keywords.Common;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.sun.jna.*;
import com.sun.jna.win32.*;

/**
* Utility method to retrieve the idle time on Windows and sample code to test it.
* JNA shall be present in your classpath for this to work (and compile).
* @author ochafik
*/
@Version(1.0f)
@ShortName("jWin32IdleTime")
@DependsOn(values={"jna-3.4.0"})
public class Win32IdleTime {

    @Hide
    public interface Kernel32 extends StdCallLibrary {
        Kernel32 INSTANCE = (Kernel32)Native.loadLibrary("kernel32", Kernel32.class);

        /**
        * Retrieves the number of milliseconds that have elapsed since the system was started.
        * @see http://msdn2.microsoft.com/en-us/library/ms724408.aspx
        * @return number of milliseconds that have elapsed since the system was started.
        */
        public int GetTickCount();
    };

    @Hide
    public interface User32 extends StdCallLibrary {
        User32 INSTANCE = (User32)Native.loadLibrary("user32", User32.class);

        /**
        * Contains the time of the last input.
        * @see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputstructures/lastinputinfo.asp
        */
        @Hide
        public static class LASTINPUTINFO extends Structure {
            public int cbSize = 8;

            /// Tick count of when the last input event was received.
            public int dwTime;
        }

        /**
        * Retrieves the time of the last input event.
        * @see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/getlastinputinfo.asp
        * @return time of the last input event, in milliseconds
        */
        public boolean GetLastInputInfo(LASTINPUTINFO result);
    };

    /**
    * Get the amount of milliseconds that have elapsed since the last input event
    * (mouse or keyboard)
    * @return idle time in milliseconds
    */
    public static int getIdleTimeMillisWin32() {
        User32.LASTINPUTINFO lastInputInfo = new User32.LASTINPUTINFO();
        User32.INSTANCE.GetLastInputInfo(lastInputInfo);
        return Kernel32.INSTANCE.GetTickCount() - lastInputInfo.dwTime;
    }

}