快乐无极的博客

BorderLayout,就是把窗体布局分成东、南、西、北、中这5部分

//BoxLayout-X，就是把控件从左往右排列

//BoxLayout-Y，就是把控件从上往下排列

//FlowLayout，就是把控件按行排列，一行装不下则放到第二行......

//GridLayout,这就是实现九宫图的排列方式！！！！！
    LWUIT要求使用Form和任何控件，都要设置窗体布局。OK，现在回顾一下以前所实现的九宫图，其原理是这样：九宫图本质就是九个按钮按照GridLayout排列，并且按钮附带图标，而且按钮获得焦点(按钮切换)时，会显示特效。
    用过J2SE GUI的朋友，应该对这些不陌生，没接触过J2SE GUI的朋友也许需要一点时间消化一下。
    OK，以下代码同样修改自Sample例子里面的，多余的话就不说了：

/*
* Copyright ?2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
*/
package com.sun.lwuit.uidemo;
import com.sun.lwuit.Button;
import com.sun.lwuit.Form;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BorderLayout;
import com.sun.lwuit.layouts.BoxLayout;
import com.sun.lwuit.layouts.FlowLayout;
import com.sun.lwuit.layouts.GridLayout;
/**
*本例演示如何布局窗体控件
*/
public class LayoutDemo implements ActionListener {
    public Form form = new Form("LayoutDemo");
    private Button border;
    private Button boxY;
    private Button boxX;
    private Button flow;
    private Button grid;
    LayoutDemo(){
        
        form.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
        //BorderLayout,就是把窗体布局分成东、南、西、北、中这5部分
        border = new Button("BorderLayout");
        //顾名思义，设置按钮背景的透明度,范围0~255，可以用Util的资源编辑器来预先修改
        border.getStyle().setBgTransparency(100);
        //每个button都需要设计监听事件
        border.addActionListener(this);
        //BoxLayout-Y，就是把控件从上往下排列
        boxY = new Button("BoxLayout-Y");
        boxY.getStyle().setBgTransparency(100);
        boxY.addActionListener(this);
        //BoxLayout-X，就是把控件从左往右排列
        boxX = new Button("BoxLayout-X");
        boxX.getStyle().setBgTransparency(100);
        boxX.addActionListener(this);
        //FlowLayout，就是把控件按行排列，一行装不下则放到第二行......
        flow = new Button("FlowLayout");
        flow.getStyle().setBgTransparency(100);
        flow.addActionListener(this);
        //GridLayout,这就是实现九宫图的排列方式！！！！！
        grid = new Button("GridLayout");
        grid.getStyle().setBgTransparency(100);
        grid.addActionListener(this);
        
        addComponents(form);
        form.show();
    }
    private void addComponents(final Form f){
        f.removeAll();
        f.addComponent(boxY);
        f.addComponent(boxX);
        f.addComponent(border);
        f.addComponent(flow);
        f.addComponent(grid);
    }
    public void actionPerformed(ActionEvent arg0) {
        String button_name=((Button)(arg0.getSource())).getText();
        if(button_name.equals("BorderLayout"))
        {
            form.setLayout(new BorderLayout());
            form.removeAll();
            form.setScrollable(false);
            form.addComponent(BorderLayout.NORTH, border);
            form.addComponent(BorderLayout.EAST, boxY);
            form.addComponent(BorderLayout.CENTER, grid);
            form.addComponent(BorderLayout.WEST, flow);
            form.addComponent(BorderLayout.SOUTH, boxX);
            form.show();
        }
        else if(button_name.equals("BoxLayout-Y"))
        {
            form.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
            form.setScrollable(false);
            addComponents(form);
            form.show();
        }
        else if(button_name.equals("FlowLayout"))
        {
            form.setLayout(new FlowLayout());
            form.setScrollable(false);
            addComponents(form);
            form.show();
        }
        else if(button_name.equals("GridLayout"))
        {
            form.setLayout(new GridLayout(3, 2));
            form.setScrollable(false);
            addComponents(form);
            form.show();
        }
        else if(button_name.equals("BoxLayout-X"))
        {
            form.setLayout(new BoxLayout(BoxLayout.X_AXIS));
            form.setScrollable(true);
            addComponents(form);
            form.show();
        }
    }
}

本文来自：http://blog.csdn.net/hellogv/ ，转载必须注明出处！