我正在编写一个自定义列表字段,但是当我调用 invalidate 方法时它不起作用。屏幕始终为空,而列表字段的数据不为空或为空!请帮我找出问题所在。
先感谢您
public class FileListField extends ListField implements ListFieldCallback{
private static final Bitmap fileBitmap = Bitmap.getBitmapResource("document.png");
private static final Bitmap dirBitmap = Bitmap.getBitmapResource("emty_folder.png");
private static final Bitmap addBitmap = Bitmap.getBitmapResource("svn_added.png");
private static final Bitmap delBitmap = Bitmap.getBitmapResource("svn_deleted.png");
private static final Bitmap modBitmap = Bitmap.getBitmapResource("svn_modified.png");
private static final Bitmap novBitmap = Bitmap.getBitmapResource("svn_noversion.png");
private static final Bitmap norBitmap = Bitmap.getBitmapResource("svn_normal.png");
//static Bitmap dowBitmap = Bitmap.getBitmapResource("svn_added.png");
private BigVector bv;
public FileListField(){
super();
bv = new BigVector();
setCallback(this);
}
public void setFileModelVector(BigVector fileModelVector){
bv.removeAll();
bv.addElements(fileModelVector.getContiguousArray());
invalidate();
System.out.println("ISSSSSSSSSSSSSS CALLLLLLLLLLINNNNNNNG?");
System.out.println("DISSSPATH?"+UiApplication.isEventDispatchThread());
// invalidateRange(0, bv.size()-1);
// FileModel[] fileModelArr = new FileModel[fileModelVector.size()];
// for(int i=0;i<fileModelVector.size();i++)
// fileModelArr[i] = (FileModel)fileModelVector.elementAt(i);
// set(fileModelArr);
}
public BigVector getFileModelVector(){
// BigVector bv = new BigVector();
// for(int i=0;i<this.getSize();i++)
// bv.addElement(get(this, i));
return bv;
}
public void set(Object[] or){
}
public Object get(ListField list, int index){
return bv.elementAt(index);
}
public int getSize(){
return bv.size();
}
public int indexOfList(ListField listField, String prefix, int start) {
return getSelectedIndex();
}
public int getPreferredWidth(ListField listField) {
return Display.getWidth();
}
public void drawListRow(ListField listField, Graphics graphics
, int index, int y, int width){
System.out.println("DRWAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA");
FileModel fileModel = (FileModel)get(listField, index);
if(fileModel.isFile())
graphics.drawBitmap(0, y, width, fileBitmap.getHeight()
, fileBitmap, 0, 0);
else
graphics.drawBitmap(0, y, width, dirBitmap.getHeight()
, dirBitmap, 0, 0);
switch(fileModel.getStatus()){
case FileModel.ADD_STATUS:
graphics.drawBitmap(0, y, width, addBitmap.getHeight()
, addBitmap, 0, 0);
break;
case FileModel.DEL_STATUS:
graphics.drawBitmap(0, y, width,delBitmap.getHeight()
, delBitmap, 0, 0);
break;
case FileModel.MOD_STATUS:
graphics.drawBitmap(0, y, width, modBitmap.getHeight()
, modBitmap, 0, 0);
break;
case FileModel.DOW_STATUS:
break;
case FileModel.NOR_STATUS:
graphics.drawBitmap(0, y, width, norBitmap.getHeight()
, norBitmap, 0, 0);
break;
default:
graphics.drawBitmap(0, y, width, novBitmap.getHeight()
, novBitmap, 0, 0);
break;
}
graphics.drawText(fileModel.getName(), fileBitmap.getWidth(), y);
}
}