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我正在使用LWUIT中的固定标题的某个表上工作。让我直接来解决这个问题。当我在仿真器上运行它时，触摸界面工作得很好，并且窗体的滚动工作完美无瑕，但是当我尝试用导航键导航时，按下的左键会产生一个小故障。该故障是，当我浏览到右侧，然后回到左边，第2列左侧滚动fezzes，它不会移动到极左无论多少次，我按下左键。经过许多努力，我发现了一个组合，随机按住UP和LEFT键不放，然后窗体向左滚动。我不知道为什么会发生这种情况。我在所有的模拟器和2个手机上都试过，但仍然是同样的问题。会不会有一些代码造成这种问题？我不确定这一点。任何帮助，将不胜感激。此外，我发布了整个源代码，以便任何感兴趣的人可以尝试它，并可以看到这个问题是否出现在他的模拟器上。表滚动不按预期方式工作
import com.sun.lwuit.Button;
import com.sun.lwuit.Component;
import com.sun.lwuit.Display;
import com.sun.lwuit.Form;
import com.sun.lwuit.Label;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.geom.Dimension;
import com.sun.lwuit.layouts.BorderLayout;
import com.sun.lwuit.table.DefaultTableModel;
import com.sun.lwuit.table.Table;
import com.sun.lwuit.table.TableModel;
import javax.microedition.lcdui.Canvas;
import javax.microedition.midlet.MIDlet;
public class FixedTableDemo extends MIDlet implements ActionListener {
private static final String[] TITLES = {"Title 1", "Title 2", "Title 3", "Title 4", "Title 5"};
private static final int ROWS = 100;
private static Dimension[] TITLE_SIZES;
Button b[][];
static class MirroredTable extends Table {
private MirroredTable mirrorTo;
public MirroredTable(TableModel m) {
super(m);
}
public MirroredTable(TableModel m, boolean b) {
super(m, b);
}
public void setScrollX(int x) {
super.setScrollX(x);
if(isDragActivated()) {
mirrorTo.setScrollX(x);
}
}
/**
* @param mirrorTo the mirrorTo to set
*/
public void setMirrorTo(MirroredTable mirrorTo) {
this.mirrorTo = mirrorTo;
}
public Component createCell(Object value, int row, int column, boolean editable) {
Component c = super.createCell(value, row, column, editable);
if(TITLE_SIZES != null && TITLE_SIZES[column] != null) {
c.setPreferredSize(TITLE_SIZES[column]);
}
return c;
}
}
MirroredTable titlesTable;
MirroredTable bodyTable;
public void startApp() {
Display.init(this);
Form f = new Form("Table Title");
titlesTable = new MirroredTable(new DefaultTableModel(TITLES, new Object[0][0]));
//TITLE_SIZES = new Dimension[TITLES.length];
/*for(int iter = 0 ; iter < TITLES.length ; iter++) {
*
* TITLE_SIZES[iter] = titlesTable.createCell(TITLES[iter], -1, iter, false).getPreferredSize();
*
* }*/
titlesTable.removeAll();
Button bt[]=new Button[5];
for(int i=0;i<5;i++)
{
bt[i]=new Button("Title "+i);
bt[i].setUIID("");
titlesTable.addComponent(bt[i]);
}
Object[][] body = new Object[ROWS][TITLES.length];
/* for(int rows = 0 ; rows < body.length ; rows++) {
*
* for(int cols = 0 ; cols < body[rows].length ; cols++) {
*
* body[rows][cols] = "" + rows + ", " + cols;
*
* }
*
* }*/
bodyTable = new MirroredTable(new DefaultTableModel(TITLES, body), false);
bodyTable.setMirrorTo(titlesTable);
titlesTable.setMirrorTo(bodyTable);
bodyTable.setScrollable(true);
titlesTable.setScrollableX(true);
f.setScrollable(false);
f.setLayout(new BorderLayout());
titlesTable.setTensileDragEnabled(false);
bodyTable.setTensileDragEnabled(false);
titlesTable.setIsScrollVisible(false);
f.addComponent(BorderLayout.NORTH, titlesTable);
f.addComponent(BorderLayout.CENTER, bodyTable);
f.addGameKeyListener(Canvas.LEFT, this);
f.addGameKeyListener(Canvas.RIGHT, this);
f.addGameKeyListener(Canvas.UP, this);
f.setCyclicFocus(false);
/**
* buttons adding and their listener
*/
b=new Button[50][5];
//Label l[][]=new Label[50][5];
for(int i=0;i<50;i++)
{
for(int j=0; j<5;j++)
{
b[i][j]=new Button("Title "+i);
b[i][j].setUIID("");
//l[i][j]=new Label("Title 1");
bodyTable.addComponent(b[i][j]);
}
}
f.show();
}
public void actionPerformed(ActionEvent evt) {
if(evt.getKeyEvent()==Canvas.LEFT)
{
System.out.println(bodyTable.getScrollX());
titlesTable.setScrollX(bodyTable.getScrollX());
}
else if(evt.getKeyEvent()==Canvas.RIGHT)
{
System.out.println(bodyTable.getScrollX());
titlesTable.setScrollX(bodyTable.getScrollX());
}
else if(evt.getKeyEvent()==Canvas.UP)
{
System.out.println("Up:"+bodyTable.getScrollX()+","+bodyTable.getScrollY());
}
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
}
感谢，它的工作完美 –