Setup Linux desktop / GUI environment

[shantanubanerjee75]

Android build upon a Linux kernel and most Linux systems use a desktop environment like GNOME, KDE, LXDE etc.

I have compiled Linux kernel and minimal root file system build with busybox, arm cross compiler tool-chain and arm-J2SE. Currently I have the basic Command Line Interface. Now I want to use a desktop environment (enable mouse and handle mouse or touchscreen inputs/events). Because my java command line codes running fine but when I am using swing or awt application it shows this exception.

Exception in thread "main" java.awt.HeadlessException at
         java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
at java.awt.Window.<init>(Window.java:535)
at java.awt.Frame.<init>(Frame.java:420)
at javax.swing.JFrame.<init>(JFrame.java:224)
at Gui.main(Gui.java:7)

Just I have a look on javadoc and It shows,

public class HeadlessException
        extends UnsupportedOperationException

Thrown when code that is dependent on a keyboard, display, or mouse is called in an environment that does not support a keyboard, display, or mouse.

Basically it need some window management or GUI like environment. I found few library for building a GUI environment like XLIB/X11,SDL which can manage those mouse and touch screen events. Can any one tell me where to start to achieve my goal. Few Linux system use startx command to enable GUI environment then brought the desktop,window,mouse etc. I need some thing like this to run my java gui applications. Could any one lead me a way.

[CaptainDangeax]

Hi.

You're talking about KDE, Gnome, etc... but that's only window managers running over X. X is the client-server handling the graphic display, mouse, keyboard, and related events. To run a graphical application, the DISPLAY environment variable must be defined (at least). For you, install xorg, and run the GUI with X, just X. startx if for launching X and the default desktop manager.

[shantanubanerjee75]

Hi.

You're talking about KDE, Gnome, etc... but that's only window managers running over X. X is the client-server handling the graphic display, mouse, keyboard, and related events. To run a graphical application, the DISPLAY environment variable must be defined (at least). For you, install xorg, and run the GUI with X, just X. startx if for launching X and the default desktop manager.

I am confusing about Xlib and X, Can you please provide the source package link? I need to cross compile the source to use it on my arm board.

[CaptainDangeax]

I am confusing about Xlib and X, Can you please provide the source package link? I need to cross compile the source to use it on my arm board.

You should begin here : X.Org Wiki - Home