User interface Blackberry-Listfield布局问题
在blackberry模拟器上显示列表字段时，我遇到了一个有趣的异常： 顶部的项目是单行文本的高度（大约12像素），其余的都很好。 有人知道为什么只有最上面的项目是这样画的吗？此外，当我在位置0添加一个空场地时，它仍然以这种方式显示第一个实际场地（位置1中的项目） 不知道该怎么办。 谢谢你的帮助 布局如下所示：User interface Blackberry-Listfield布局问题,user-interface,blackberry,layout,listfield,User Interface,Blackberry,Layout,Listfield,在blackberry模拟器上显示列表字段时，我遇到了一个有趣的异常： 顶部的项目是单行文本的高度（大约12像素），其余的都很好。 有人知道为什么只有最上面的项目是这样画的吗？此外，当我在位置0添加一个空场地时，它仍然以这种方式显示第一个实际场地（位置1中的项目） 不知道该怎么办。 谢谢你的帮助 布局如下所示： ----------------------------------- | *part of image* | title | ---------------------
-----------------------------------
| *part of image* | title |
-----------------------------------
| | title |
| * full image * | address |
| | city, zip |
-----------------------------------
listField = new ListField( venueList.size() );
listField.setCallback( this );
listField.setSelectedIndex(-1);
_middle.add( listField );
public void drawListRow( ListField listField, Graphics graphics,
int index, int y, int width )
{
listField.setRowHeight(90);
Hashtable item = (Hashtable) venueList.elementAt( index );
String venue_name = (String) item.get("name");
String image_url = (String) item.get("image_url");
String address = (String) item.get("address");
String city = (String) item.get("city");
String zip = (String) item.get("zip");
EncodedImage img = null;
try
{
String filename = image_url.substring(image_url.indexOf("crop/")
+ 5, image_url.length() );
FileConnection fconn = (FileConnection)Connector.open(
"file:///SDCard/Blackberry/project1/" + filename,
Connector.READ);
if ( !fconn.exists() )
{
}
else
{
InputStream input = fconn.openInputStream();
byte[] data = new byte[(int)fconn.fileSize()];
input.read(data);
input.close();
if(data.length > 0)
{
EncodedImage rawimg = EncodedImage.createEncodedImage(
data, 0, data.length);
int dw = Fixed32.toFP(Display.getWidth());
int iw = Fixed32.toFP(rawimg.getWidth());
int sf = Fixed32.div(iw, dw);
img = rawimg.scaleImage32(sf * 4, sf * 4);
}
else
{
}
}
}
catch(IOException ef)
{
}
graphics.drawText( venue_name, 140, y, 0, width );
graphics.drawText( address, 140, y + 15, 0, width );
graphics.drawText( city + ", " + zip, 140, y + 30, 0, width );
if(img != null)
{
graphics.drawImage(0, y, img.getWidth(), img.getHeight(),
img, 0, 0, 0);
}
}
listField = new ListField( venueList.size() );
listField.setRowHeight(90);
listField.setCallback( this );
listField.setSelectedIndex(-1);
_middle.add( listField );
listField = new ListField( venueList.size() );
listField.setRowHeight(90);
listField.setCallback( this );
listField.setSelectedIndex(-1);
_middle.add( listField );
package venue;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import net.rim.device.api.math.Fixed32;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.Display;
import net.rim.device.api.system.EncodedImage;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.FocusChangeListener;
import net.rim.device.api.ui.Font;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.Ui;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.BitmapField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.ListField;
import net.rim.device.api.ui.component.ListFieldCallback;
import net.rim.device.api.ui.component.Menu;
import net.rim.device.api.ui.component.RichTextField;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
public class categoryView extends MainScreen implements FieldChangeListener, ListFieldCallback, FocusChangeListener {
private HorizontalFieldManager _top;
private HorizontalFieldManager _nav;
private VerticalFieldManager _middle;
private int horizontalOffset;
private final static long animationTime = 300;
private long animationStart = 0;
private int venue_id;
private int category_id;
private CustomButtonField rectangle;
private Vector venueList = new Vector();
private Hashtable venue_index = new Hashtable();
private Vector image_index = new Vector();
private ListField listField;
private int last_menu_item = 2;
private int last_nav = 2;
private int before_last = 1;
private int location_count = 0;
private int img_width = 120;
private int img_height = 80;
private Field f;
public categoryView(int id) {
super();
category_id = id;
horizontalOffset = Display.getWidth();
_top = new HorizontalFieldManager(Manager.USE_ALL_WIDTH | Field.FIELD_HCENTER)
{
public void paint(Graphics gr)
{
Bitmap bg = Bitmap.getBitmapResource("bg.png");
gr.drawBitmap(0, 0, Display.getWidth(), Display.getHeight(), bg, 0, 0);
subpaint(gr);
}
};
_nav = new HorizontalFieldManager(Field.USE_ALL_WIDTH);
_middle = new VerticalFieldManager();
add(_top);
add(_nav);
add(_middle);
Bitmap lol = Bitmap.getBitmapResource("logo.png");
BitmapField lolfield = new BitmapField(lol);
_top.add(lolfield);
HorizontalFieldManager nav = new HorizontalFieldManager(Field.USE_ALL_WIDTH | Manager.HORIZONTAL_SCROLL);
Vector locs = getLocations();
Hashtable locations = (Hashtable) locs.elementAt(0);
Enumeration ne = locations.keys();
Enumeration nv = locations.elements();
int counter = 1;
if(locations.size() > 1)
{
counter = locations.size() - 1;
}
int count = 1;
while(ne.hasMoreElements())
{
final String location_id = ne.nextElement().toString();
String location = nv.nextElement().toString();
last_nav = Integer.parseInt(location_id);
rectangle = new CustomButtonField(location_id, location, 25, Field.FOCUSABLE);
rectangle.setFocusListener(this);
nav.add(rectangle);
if(count == counter)
{
before_last = Integer.parseInt(location_id);
}
count ++;
}
_nav.add(nav);
}
public void setDefaultLocation()
{
Vector locs = getLocations();
Hashtable loc1 = (Hashtable) locs.elementAt(0);
Enumeration er = loc1.keys();
Enumeration vr = loc1.elements();
int i = 0;
while(er.hasMoreElements())
{
final String location_id = er.nextElement().toString();
if(i == 0)
{
last_menu_item = Integer.parseInt(location_id);
}
i ++;
}
}
public void drawMiddle()
{
Vector venues = getVenues(category_id);
Hashtable venue_list = (Hashtable) venues.elementAt(0);
Enumeration e = venue_list.keys();
Enumeration v = venue_list.elements();
int count = 0;
while(e.hasMoreElements())
{
String vid = e.nextElement().toString();
Hashtable elm = (Hashtable)v.nextElement();
venueList.addElement(elm);
venue_index.put(Integer.toString(count), (String) elm.get("venue_id"));
EncodedImage img = null;
String image_url = (String) elm.get("image_url");
try
{
String filename;
if(image_url.length() > 5)
{
filename = image_url.substring( image_url.indexOf("crop/") + 5, image_url.length() );
}
else
{
filename = "1.png";
}
FileConnection fconn = (FileConnection) Connector.open( "file:///SDCard/Blackberry/venue/" + filename, Connector.READ);
if ( !fconn.exists() )
{
}
else
{
InputStream input = fconn.openInputStream();
byte[] data = new byte[(int)fconn.fileSize()];
input.read(data);
input.close();
if(data.length > 0)
{
EncodedImage rawimg = EncodedImage.createEncodedImage(data, 0, data.length);
int dw = Fixed32.toFP(Display.getWidth());
int iw = Fixed32.toFP(rawimg.getWidth());
int sf = Fixed32.div(iw, dw);
img = rawimg.scaleImage32(sf * 4, sf * 4);
img_width = (int) Math.ceil(Display.getWidth() / 4);
img_height = (int) Math.ceil(Display.getWidth() / 6);
}
else
{
}
}
}
catch(IOException ef)
{
}
image_index.addElement(img);
count ++;
}
final int count_results = count;
_middle = new VerticalFieldManager( Manager.VERTICAL_SCROLLBAR )
{
public void paint(Graphics graphics)
{
graphics.setBackgroundColor(0xFFFFFF);
graphics.setColor(Color.BLACK);
graphics.clear();
super.paint(graphics);
}
protected void sublayout(int maxWidth, int maxHeight)
{
int displayWidth = Display.getWidth();
//int displayHeight = Display.getHeight();
int displayHeight = count_results * img_height;
super.sublayout( displayWidth, displayHeight);
setExtent( displayWidth, displayHeight);
}
};
add(_middle);
listField = new ListField( venueList.size() );
listField.setCallback( this );
listField.setSelectedIndex(-1);
listField.setRowHeight(img_height);
_middle.add( listField );
_middle.add(new RichTextField(Field.NON_FOCUSABLE));
}
public boolean navigationClick(int status, int time) {
Field focus = UiApplication.getUiApplication().getActiveScreen() .getLeafFieldWithFocus();
if (focus instanceof ListField) {
int selected = listField.getSelectedIndex();
String venue_id = (String) venue_index.get(Integer.toString(selected));
moveScreens(venue_id);
}
return true;
}
void setListSize()
{
listField.setSize( venueList.size() );
}
public void drawListRow( ListField listField, Graphics graphics, int index, int y, int width )
{
Hashtable item = (Hashtable) venueList.elementAt( index );
String venue_name = (String) item.get("name");
String address = (String) item.get("address");
String city = (String) item.get("city");
String zip = (String) item.get("zip");
EncodedImage img = (EncodedImage) image_index.elementAt(index);
graphics.drawText( venue_name, img_width + 10, y, 0, width );
graphics.drawText( address, img_width + 10, y + 15, 0, width );
graphics.drawText( city + ", " + zip, img_width + 10, y + 30, 0, width );
if(img != null)
{
graphics.drawImage(0, y + 3, img.getWidth(), img.getHeight(), img, 0, 0, 0);
}
}
public Object get( ListField listField, int index )
{
return venueList.elementAt( index );
}
public Vector getCategories()
{
Vector results = new Vector();
database db = new database();
Vector categories = db.getCategories();
if(categories.size() > 0)
results = categories;
return results;
}
public Vector getLocations()
{
Vector results = new Vector();
database db = new database();
Vector subcats = db.getCategoryLocations(category_id);
Hashtable subs = (Hashtable) subcats.elementAt(0);
if(subs.size() > 0)
{
location_count = subs.size();
results = subcats;
}
return results;
}
public Vector getVenues(int category_id)
{
Vector results = new Vector();
database db = new database();
Vector venues = db.getLocationVenues(category_id, last_menu_item);
if(venues.size() > 0)
results = venues;
return results;
}
protected void makeMenu(Menu menu, int instance)
{
super.makeMenu(menu, instance);
menu.add(new MenuItem("Home", 10, 20){
public void run()
{
moveScreens("main");
}
});
menu.add(new MenuItem("Search", 10, 20){
public void run()
{
Dialog.inform("Search was clicked.");
}
});
Vector locs = getLocations();
Hashtable locations = (Hashtable) locs.elementAt(0);
Enumeration e = locations.keys();
Enumeration v = locations.elements();
while(e.hasMoreElements())
{
final String location_id = e.nextElement().toString();
String location = v.nextElement().toString();
menu.add(new MenuItem(location, 10, 20){
public void run()
{
Dialog.inform("Location " + location_id + " was clicked");
}
});
}
}
public void moveScreens(String type)
{
if(type == "main")
{
UiApplication.getUiApplication().popScreen(this);
}
else
{
int venue_id = Integer.parseInt(type);
Screen newScreen = new ViewVenue(venue_id);
UiApplication.getUiApplication().pushScreen(newScreen);
}
}
protected void sublayout(int width, int height)
{
super.sublayout(width, height);
if(horizontalOffset > 0)
{
if(animationStart == 0)
{
animationStart = System.currentTimeMillis();
}
else
{
long timeElapsed = System.currentTimeMillis() - animationStart;
if(timeElapsed >= animationTime)
{
horizontalOffset = 0;
}
else
{
float percentDone = (float)timeElapsed / (float)animationTime;
horizontalOffset = Display.getWidth() - (int)(percentDone * Display.getWidth());
}
}
}
setPosition(horizontalOffset, 0);
if(horizontalOffset > 0)
{
UiApplication.getUiApplication().invokeLater(new Runnable(){
public void run()
{
updateLayout();
}
});
}
}
public void fieldChanged(Field field, int context)
{
int id = 0;
if (field instanceof CustomButtonField) {
id = ((CustomButtonField)field).getId();
}
venue_id = id;
Dialog.inform(Integer.toString(venue_id));
//moveScreens("venue");
}
public void focusChanged(Field field, int eventType) {
if((eventType == FocusChangeListener.FOCUS_GAINED)) {
if (field instanceof CustomButtonField) {
final int id = ((CustomButtonField)field).getId();
if(id == last_nav && before_last != last_menu_item && last_nav != before_last)
{
//updateContent(id);
f.setFocus();
}
else
{
updateContent(id);
f = field;
}
}
}
}
public void updateContent(final int id)
{
UiApplication.getUiApplication().invokeLater(new Runnable(){
public void run()
{
delete(_middle);
venueList.removeAllElements();
image_index.removeAllElements();
last_menu_item = id;
drawMiddle();
}
});
}
public boolean onSavePrompt()
{
// do nothing
return true;
}
public int getPreferredWidth(ListField listField) {
// TODO Auto-generated method stub
return 0;
}
public int indexOfList(ListField listField, String prefix, int start) {
// TODO Auto-generated method stub
return 0;
}
}
package venue;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import net.rim.device.api.math.Fixed32;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.Display;
import net.rim.device.api.system.EncodedImage;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.FocusChangeListener;
import net.rim.device.api.ui.Font;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.Ui;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.BitmapField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.ListField;
import net.rim.device.api.ui.component.ListFieldCallback;
import net.rim.device.api.ui.component.Menu;
import net.rim.device.api.ui.component.RichTextField;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
public class categoryView extends MainScreen implements FieldChangeListener, ListFieldCallback, FocusChangeListener {
private HorizontalFieldManager _top;
private HorizontalFieldManager _nav;
private VerticalFieldManager _middle;
private int horizontalOffset;
private final static long animationTime = 300;
private long animationStart = 0;
private int venue_id;
private int category_id;
private CustomButtonField rectangle;
private Vector venueList = new Vector();
private Hashtable venue_index = new Hashtable();
private Vector image_index = new Vector();
private ListField listField;
private int last_menu_item = 2;
private int last_nav = 2;
private int before_last = 1;
private int location_count = 0;
private int img_width = 120;
private int img_height = 80;
private Field f;
public categoryView(int id) {
super();
category_id = id;
horizontalOffset = Display.getWidth();
_top = new HorizontalFieldManager(Manager.USE_ALL_WIDTH | Field.FIELD_HCENTER)
{
public void paint(Graphics gr)
{
Bitmap bg = Bitmap.getBitmapResource("bg.png");
gr.drawBitmap(0, 0, Display.getWidth(), Display.getHeight(), bg, 0, 0);
subpaint(gr);
}
};
_nav = new HorizontalFieldManager(Field.USE_ALL_WIDTH);
_middle = new VerticalFieldManager();
add(_top);
add(_nav);
add(_middle);
Bitmap lol = Bitmap.getBitmapResource("logo.png");
BitmapField lolfield = new BitmapField(lol);
_top.add(lolfield);
HorizontalFieldManager nav = new HorizontalFieldManager(Field.USE_ALL_WIDTH | Manager.HORIZONTAL_SCROLL);
Vector locs = getLocations();
Hashtable locations = (Hashtable) locs.elementAt(0);
Enumeration ne = locations.keys();
Enumeration nv = locations.elements();
int counter = 1;
if(locations.size() > 1)
{
counter = locations.size() - 1;
}
int count = 1;
while(ne.hasMoreElements())
{
final String location_id = ne.nextElement().toString();
String location = nv.nextElement().toString();
last_nav = Integer.parseInt(location_id);
rectangle = new CustomButtonField(location_id, location, 25, Field.FOCUSABLE);
rectangle.setFocusListener(this);
nav.add(rectangle);
if(count == counter)
{
before_last = Integer.parseInt(location_id);
}
count ++;
}
_nav.add(nav);
}
public void setDefaultLocation()
{
Vector locs = getLocations();
Hashtable loc1 = (Hashtable) locs.elementAt(0);
Enumeration er = loc1.keys();
Enumeration vr = loc1.elements();
int i = 0;
while(er.hasMoreElements())
{
final String location_id = er.nextElement().toString();
if(i == 0)
{
last_menu_item = Integer.parseInt(location_id);
}
i ++;
}
}
public void drawMiddle()
{
Vector venues = getVenues(category_id);
Hashtable venue_list = (Hashtable) venues.elementAt(0);
Enumeration e = venue_list.keys();
Enumeration v = venue_list.elements();
int count = 0;
while(e.hasMoreElements())
{
String vid = e.nextElement().toString();
Hashtable elm = (Hashtable)v.nextElement();
venueList.addElement(elm);
venue_index.put(Integer.toString(count), (String) elm.get("venue_id"));
EncodedImage img = null;
String image_url = (String) elm.get("image_url");
try
{
String filename;
if(image_url.length() > 5)
{
filename = image_url.substring( image_url.indexOf("crop/") + 5, image_url.length() );
}
else
{
filename = "1.png";
}
FileConnection fconn = (FileConnection) Connector.open( "file:///SDCard/Blackberry/venue/" + filename, Connector.READ);
if ( !fconn.exists() )
{
}
else
{
InputStream input = fconn.openInputStream();
byte[] data = new byte[(int)fconn.fileSize()];
input.read(data);
input.close();
if(data.length > 0)
{
EncodedImage rawimg = EncodedImage.createEncodedImage(data, 0, data.length);
int dw = Fixed32.toFP(Display.getWidth());
int iw = Fixed32.toFP(rawimg.getWidth());
int sf = Fixed32.div(iw, dw);
img = rawimg.scaleImage32(sf * 4, sf * 4);
img_width = (int) Math.ceil(Display.getWidth() / 4);
img_height = (int) Math.ceil(Display.getWidth() / 6);
}
else
{
}
}
}
catch(IOException ef)
{
}
image_index.addElement(img);
count ++;
}
final int count_results = count;
_middle = new VerticalFieldManager( Manager.VERTICAL_SCROLLBAR )
{
public void paint(Graphics graphics)
{
graphics.setBackgroundColor(0xFFFFFF);
graphics.setColor(Color.BLACK);
graphics.clear();
super.paint(graphics);
}
protected void sublayout(int maxWidth, int maxHeight)
{
int displayWidth = Display.getWidth();
//int displayHeight = Display.getHeight();
int displayHeight = count_results * img_height;
super.sublayout( displayWidth, displayHeight);
setExtent( displayWidth, displayHeight);
}
};
add(_middle);
listField = new ListField( venueList.size() );
listField.setCallback( this );
listField.setSelectedIndex(-1);
listField.setRowHeight(img_height);
_middle.add( listField );
_middle.add(new RichTextField(Field.NON_FOCUSABLE));
}
public boolean navigationClick(int status, int time) {
Field focus = UiApplication.getUiApplication().getActiveScreen() .getLeafFieldWithFocus();
if (focus instanceof ListField) {
int selected = listField.getSelectedIndex();
String venue_id = (String) venue_index.get(Integer.toString(selected));
moveScreens(venue_id);
}
return true;
}
void setListSize()
{
listField.setSize( venueList.size() );
}
public void drawListRow( ListField listField, Graphics graphics, int index, int y, int width )
{
Hashtable item = (Hashtable) venueList.elementAt( index );
String venue_name = (String) item.get("name");
String address = (String) item.get("address");
String city = (String) item.get("city");
String zip = (String) item.get("zip");
EncodedImage img = (EncodedImage) image_index.elementAt(index);
graphics.drawText( venue_name, img_width + 10, y, 0, width );
graphics.drawText( address, img_width + 10, y + 15, 0, width );
graphics.drawText( city + ", " + zip, img_width + 10, y + 30, 0, width );
if(img != null)
{
graphics.drawImage(0, y + 3, img.getWidth(), img.getHeight(), img, 0, 0, 0);
}
}
public Object get( ListField listField, int index )
{
return venueList.elementAt( index );
}
public Vector getCategories()
{
Vector results = new Vector();
database db = new database();
Vector categories = db.getCategories();
if(categories.size() > 0)
results = categories;
return results;
}
public Vector getLocations()
{
Vector results = new Vector();
database db = new database();
Vector subcats = db.getCategoryLocations(category_id);
Hashtable subs = (Hashtable) subcats.elementAt(0);
if(subs.size() > 0)
{
location_count = subs.size();
results = subcats;
}
return results;
}
public Vector getVenues(int category_id)
{
Vector results = new Vector();
database db = new database();
Vector venues = db.getLocationVenues(category_id, last_menu_item);
if(venues.size() > 0)
results = venues;
return results;
}
protected void makeMenu(Menu menu, int instance)
{
super.makeMenu(menu, instance);
menu.add(new MenuItem("Home", 10, 20){
public void run()
{
moveScreens("main");
}
});
menu.add(new MenuItem("Search", 10, 20){
public void run()
{
Dialog.inform("Search was clicked.");
}
});
Vector locs = getLocations();
Hashtable locations = (Hashtable) locs.elementAt(0);
Enumeration e = locations.keys();
Enumeration v = locations.elements();
while(e.hasMoreElements())
{
final String location_id = e.nextElement().toString();
String location = v.nextElement().toString();
menu.add(new MenuItem(location, 10, 20){
public void run()
{
Dialog.inform("Location " + location_id + " was clicked");
}
});
}
}
public void moveScreens(String type)
{
if(type == "main")
{
UiApplication.getUiApplication().popScreen(this);
}
else
{
int venue_id = Integer.parseInt(type);
Screen newScreen = new ViewVenue(venue_id);
UiApplication.getUiApplication().pushScreen(newScreen);
}
}
protected void sublayout(int width, int height)
{
super.sublayout(width, height);
if(horizontalOffset > 0)
{
if(animationStart == 0)
{
animationStart = System.currentTimeMillis();
}
else
{
long timeElapsed = System.currentTimeMillis() - animationStart;
if(timeElapsed >= animationTime)
{
horizontalOffset = 0;
}
else
{
float percentDone = (float)timeElapsed / (float)animationTime;
horizontalOffset = Display.getWidth() - (int)(percentDone * Display.getWidth());
}
}
}
setPosition(horizontalOffset, 0);
if(horizontalOffset > 0)
{
UiApplication.getUiApplication().invokeLater(new Runnable(){
public void run()
{
updateLayout();
}
});
}
}
public void fieldChanged(Field field, int context)
{
int id = 0;
if (field instanceof CustomButtonField) {
id = ((CustomButtonField)field).getId();
}
venue_id = id;
Dialog.inform(Integer.toString(venue_id));
//moveScreens("venue");
}
public void focusChanged(Field field, int eventType) {
if((eventType == FocusChangeListener.FOCUS_GAINED)) {
if (field instanceof CustomButtonField) {
final int id = ((CustomButtonField)field).getId();
if(id == last_nav && before_last != last_menu_item && last_nav != before_last)
{
//updateContent(id);
f.setFocus();
}
else
{
updateContent(id);
f = field;
}
}
}
}
public void updateContent(final int id)
{
UiApplication.getUiApplication().invokeLater(new Runnable(){
public void run()
{
delete(_middle);
venueList.removeAllElements();
image_index.removeAllElements();
last_menu_item = id;
drawMiddle();
}
});
}
public boolean onSavePrompt()
{
// do nothing
return true;
}
public int getPreferredWidth(ListField listField) {
// TODO Auto-generated method stub
return 0;
}
public int indexOfList(ListField listField, String prefix, int start) {
// TODO Auto-generated method stub
return 0;
}
}
顺便说一下，这里抛出了图像处理，以显示我对图像所做的操作。它实际上在其他地方构造为编码图像的向量，并由elementAt（index）调用。当在正确的位置时，它仍然会奇怪地显示。嗨！您正在使用什么设备/操作系统？顺便说一句，在构建listfield后，应该调用setRowHeight一次，而不是在每次重新绘制行时调用drawListRow的内部。4.7上的bold 9000谢谢提示。哦，这就解决了它。谢谢麦克斯，为什么不把这变成一个答案呢？顺便说一句，图像处理在这里是为了显示我在为图像做什么。它实际上在其他地方构造为编码图像的向量，并由elementAt（index）调用。当在正确的位置时，它仍然会奇怪地显示。嗨！您正在使用什么设备/操作系统？顺便说一句，在构建listfield后，应该调用setRowHeight一次，而不是在每次重新绘制行时调用drawListRow的内部。4.7上的bold 9000谢谢提示。哦，这就解决了它。谢谢麦克斯，为什么不把这变成一个答案？