Blackberry 如何通过实现listfieldcallback()在listfield中设置不同的行高?
这是我最新的Blackberry 如何通过实现listfieldcallback()在listfield中设置不同的行高?,blackberry,listfield,row-height,Blackberry,Listfield,Row Height,这是我最新的自定义列表字段类 public class Custom_ListField extends ListField { private String[] title, category, date, imagepath; private int[] newsid, catsid; private List_News newslist; private Bitmap imagebitmap[], localimage = Config_GlobalFunction .Bi
自定义列表字段
类
public class Custom_ListField extends ListField {
private String[] title, category, date, imagepath;
private int[] newsid, catsid;
private List_News newslist;
private Bitmap imagebitmap[], localimage = Config_GlobalFunction
.Bitmap("image_base.png");
private BrowserField webpage;
private boolean islatest;
private int highest = 0;
private Vector content = null;
private ListCallback callback = null;
private int currentPosition = 0;
public Custom_ListField(Vector content, boolean islatest) {
this.content = content;
this.islatest = islatest;
newsid = new int[content.size()];
title = new String[content.size()];
category = new String[content.size()];
date = new String[content.size()];
imagepath = new String[content.size()];
catsid = new int[content.size()];
imagebitmap = new Bitmap[content.size()];
for (int i = 0; i < content.size(); i++) {
newslist = (List_News) content.elementAt(i);
newsid[i] = newslist.getID();
title[i] = newslist.getNtitle();
category[i] = newslist.getNewCatName();
date[i] = newslist.getNArticalD();
imagepath[i] = newslist.getImagePath();
catsid[i] = newslist.getCatID();
if (!imagepath[i].toString().equals("no picture")) {
imagebitmap[i] = Util_ImageLoader.loadImage(imagepath[i]);
if (imagebitmap[i].getHeight() > highest)
highest = imagebitmap[i].getHeight();
} else {
imagebitmap[i] = localimage;
}
catsid[i] = newslist.getCatID();
if (catsid[0] != 9)
this.setRowHeight( localimage.getHeight() + 10);
else
this.setRowHeight( highest + 10);
}
initCallbackListening();
}
private void initCallbackListening() {
callback = new ListCallback();
this.setCallback(callback);
}
private class ListCallback implements ListFieldCallback {
public ListCallback() {
setBackground(Config_GlobalFunction
.loadbackground("background.png"));
}
public void drawListRow(ListField listField, Graphics graphics,
int index, int y, int width) {
currentPosition = index;
graphics.setColor(Color.WHITE);
if (catsid[0] != 9) {
graphics.drawBitmap(
Display.getWidth() - localimage.getWidth() - 5,
y
+ ((listField.getRowHeight() - localimage
.getHeight()) / 2),
localimage.getWidth(), localimage.getHeight(),
imagebitmap[index], 0, 0);
} else {
graphics.drawBitmap(
Display.getWidth() - imagebitmap[index].getWidth() - 5,
y
+ (listField.getRowHeight() - imagebitmap[index]
.getHeight()) / 2,
imagebitmap[index].getWidth(),
imagebitmap[index].getHeight(), imagebitmap[index], 0,
0);
}
graphics.drawRect(0, y, width, listField.getRowHeight());
graphics.setColor(Color.BLACK);
Vector text = Config_GlobalFunction.wrap(title[index],
Display.getWidth() - imagebitmap[index].getWidth() - 10);
for (int i = 0; i < text.size(); i++) {
int liney = y + (i * Font.getDefault().getHeight());
graphics.drawText((String) text.elementAt(i), 5, liney + 3,
DrawStyle.TOP | DrawStyle.LEFT | DrawStyle.ELLIPSIS,
Display.getWidth() - imagebitmap[index].getWidth() - 10);
}
graphics.setColor(Color.GRAY);
graphics.drawText(date[index], 5, y + Font.getDefault().getHeight()
* text.size());
if (islatest) {
graphics.setColor(Color.RED);
graphics.drawText(category[index], Font.getDefault()
.getAdvance(date[index]) + 15, y
+ Font.getDefault().getHeight() * text.size());
}
}
public Object get(ListField listField, int index) {
return content.elementAt(index);
}
public int getPreferredWidth(ListField listField) {
return Display.getWidth();
}
public int indexOfList(ListField listField, String prefix, int start) {
return content.indexOf(prefix, start);
}
}
public int getCurrentPosition() {
return currentPosition;
}
protected boolean navigationClick(int status, int time) {
final int index = getCurrentPosition();
Main.getUiApplication().pushScreen(new Custom_LoadingScreen(1));
Main.getUiApplication().invokeLater(new Runnable() {
public void run() {
if (catsid[index] == 9) {
if (Config_GlobalFunction.isConnected()) {
webpage = new BrowserField();
MainScreen aboutus = new Menu_Aboutus();
aboutus.add(webpage);
Main.getUiApplication().pushScreen(aboutus);
webpage.requestContent("http://www.orientaldaily.com.my/index.php?option=com_k2&view=item&id="
+ newsid[index] + ":&Itemid=223");
} else
Config_GlobalFunction.Message(
Config_GlobalFunction.nowifi, 1);
} else
Main.getUiApplication().pushScreen(
new Main_NewsDetail(newsid[index]));
}
}, 1 * 1000, false);
return true;
}
}
public类自定义\u ListField扩展ListField{
私有字符串[]标题、类别、日期、图像路径;
私有int[]新闻ID,catsid;
私人列表\新闻列表;
私有位图imagebitmap[],localimage=Config_GlobalFunction
.Bitmap(“image_base.png”);
私人BrowserField网页;
私有布尔孤岛;
私有整数最高=0;
私有向量内容=空;
私有ListCallback=null;
私有int currentPosition=0;
公共自定义列表字段(向量内容,布尔值islatest){
this.content=内容;
this.islatest=islatest;
newsid=newint[content.size()];
title=新字符串[content.size()];
类别=新字符串[content.size()];
日期=新字符串[content.size()];
imagepath=新字符串[content.size()];
catsid=newint[content.size()];
imagebitmap=新位图[content.size()];
对于(int i=0;i最高)
最高=图像位图[i]。getHeight();
}否则{
图像位图[i]=局部图像;
}
catsid[i]=newslist.getCatID();
如果(catsid[0]!=9)
this.setRowHeight(localimage.getHeight()+10);
其他的
此值为.setRowHeight(最高+10);
}
initcallbacklisting();
}
私有void initcallbacklisting(){
callback=newlistcallback();
这个.setCallback(callback);
}
私有类ListCallback实现ListFieldCallback{
公共列表回调(){
设置背景(配置\全局功能
.loadbackground(“background.png”);
}
public void drawListRow(ListField ListField、Graphics、,
整数索引,整数y,整数宽度){
当前位置=索引;
图形.设置颜色(颜色.白色);
如果(catsid[0]!=9){
绘图位图(
Display.getWidth()-localimage.getWidth()-5,
Y
+((listField.getRowHeight()-localimage)
.getHeight())/2),
localimage.getWidth(),localimage.getHeight(),
图像位图[索引],0,0);
}否则{
绘图位图(
Display.getWidth()-imagebitmap[index].getWidth()-5,
Y
+(listField.getRowHeight()-imagebitmap[索引]
.getHeight())/2,
imagebitmap[index].getWidth(),
imagebitmap[index].getHeight(),imagebitmap[index],0,
0);
}
graphics.drawRect(0,y,width,listField.getRowHeight());
图形.设置颜色(颜色.黑色);
Vector text=Config_GlobalFunction.wrap(标题[索引],
Display.getWidth()-imagebitmap[index].getWidth()-10);
对于(int i=0;i
我尝试使用this.setRowHeight(I,最高+10)进行设置代码>。它返回错误的高度大小,并且每行的高度仍然相同
我相信有一些棘手的地方,黑莓不支持设置不同的行高。要设置动态行高,它必须在listfieldcall中再次调用
public class Custom_ListField extends ListField {
private String[] title, category, date, imagepath;
private int[] newsid, catsid;
private List_News newslist;
private Bitmap imagebitmap[], localimage = Config_GlobalFunction
.Bitmap("image_base.png");
private BrowserField webpage;
private boolean islatest;
private Vector content = null, text;
private ListCallback callback = null;
private int currentPosition = 0;
public Custom_ListField(Vector content, boolean islatest) {
this.content = content;
this.islatest = islatest;
newsid = new int[content.size()];
title = new String[content.size()];
category = new String[content.size()];
date = new String[content.size()];
imagepath = new String[content.size()];
catsid = new int[content.size()];
imagebitmap = new Bitmap[content.size()];
for (int i = 0; i < content.size(); i++) {
newslist = (List_News) content.elementAt(i);
newsid[i] = newslist.getID();
title[i] = newslist.getNtitle();
category[i] = newslist.getNewCatName();
date[i] = newslist.getNArticalD();
imagepath[i] = newslist.getImagePath();
catsid[i] = newslist.getCatID();
if (!imagepath[i].toString().equals("no picture")) {
imagebitmap[i] = Util_ImageLoader.loadImage(imagepath[i]);
}
}
initCallbackListening();
}
private void initCallbackListening() {
callback = new ListCallback();
this.setCallback(callback);
this.setRowHeight(-2);
}
private class ListCallback implements ListFieldCallback {
public ListCallback() {
}
public void drawListRow(ListField listField, Graphics graphics,
int index, int y, int width) {
currentPosition = index;
setBackground(BackgroundFactory.createBitmapBackground(
Bitmap.getBitmapResource("background_news_list.png"),
Background.POSITION_X_LEFT, Background.POSITION_Y_TOP,
Background.REPEAT_SCALE_TO_FIT));
if (!imagepath[index].toString().equals("no picture")) {
float ratio = (float) ((float) localimage.getHeight() / (float) imagebitmap[index]
.getHeight());
Bitmap temp = new Bitmap(
(int) (imagebitmap[index].getWidth() * ratio),
(int) (imagebitmap[index].getHeight() * ratio));
imagebitmap[index].scaleInto(temp, Bitmap.FILTER_BILINEAR,
Bitmap.SCALE_TO_FIT);
imagebitmap[index] = temp;
graphics.drawBitmap(
Display.getWidth()
- localimage.getWidth()
- 5
+ ((localimage.getWidth() - imagebitmap[index]
.getWidth()) / 2),
y
+ (listField.getRowHeight(index) - localimage
.getHeight()) / 2,
imagebitmap[index].getWidth(),
imagebitmap[index].getHeight(), imagebitmap[index], 0,
0);
graphics.setColor(Color.BLACK);
text = Config_GlobalFunction
.wrap(title[index], Display.getWidth()
- imagebitmap[index].getWidth() - 10);
for (int i = 0; i < text.size(); i++) {
int liney = y + (i * Font.getDefault().getHeight());
graphics.drawText(
(String) text.elementAt(i),
5,
liney + 3,
DrawStyle.TOP | DrawStyle.LEFT | DrawStyle.ELLIPSIS,
Display.getWidth() - imagebitmap[index].getWidth()
- 10);
}
} else {
graphics.setColor(Color.BLACK);
text = Config_GlobalFunction.wrap(title[index],
Display.getWidth() - 10);
for (int i = 0; i < text.size(); i++) {
int liney = y + (i * Font.getDefault().getHeight());
graphics.drawText(
(String) text.elementAt(i),
5,
liney + 3,
DrawStyle.TOP | DrawStyle.LEFT | DrawStyle.ELLIPSIS,
Display.getWidth() - 10);
}
}
if (text.size() == 2) {
graphics.setColor(Color.GRAY);
graphics.drawText(date[index], 5, y
+ Font.getDefault().getHeight() + 3);
if (islatest) {
graphics.setColor(Color.RED);
graphics.drawText(category[index], Font.getDefault()
.getAdvance(date[index]) + 15, y
+ Font.getDefault().getHeight() + 3);
}
} else if (text.size() == 3) {
graphics.setColor(Color.GRAY);
graphics.drawText(date[index], 5, y
+ Font.getDefault().getHeight() * 2 + 3);
if (islatest) {
graphics.setColor(Color.RED);
graphics.drawText(category[index], Font.getDefault()
.getAdvance(date[index]) + 15, y
+ Font.getDefault().getHeight() * 2 + 3);
}
}
if (!imagepath[index].toString().equals("no picture")) {
setRowHeight(index, imagebitmap[index].getHeight() + 10);
} else {
if (text.size() == 2)
setRowHeight(index, getRowHeight() + 9);
else if (text.size() == 3) {
setRowHeight(index, getRowHeight() * 15 / 10 + 9);
}
}
graphics.setColor(Color.WHITE);
graphics.drawRect(0, y, width, listField.getRowHeight(index));
}
public Object get(ListField listField, int index) {
return content.elementAt(index);
}
public int getPreferredWidth(ListField listField) {
return Display.getWidth();
}
public int indexOfList(ListField listField, String prefix, int start) {
return content.indexOf(prefix, start);
}
}
public int getCurrentPosition() {
return currentPosition;
}
protected boolean navigationClick(int status, int time) {
final int index = getCurrentPosition();
Main.getUiApplication().pushScreen(new Custom_LoadingScreen(1));
Main.getUiApplication().invokeLater(new Runnable() {
public void run() {
if (catsid[index] == 9) {
if (Config_GlobalFunction.isConnected()) {
webpage = new BrowserField();
MainScreen aboutus = new Menu_Aboutus();
aboutus.add(webpage);
Main.getUiApplication().pushScreen(aboutus);
webpage.requestContent("http://www.orientaldaily.com.my/index.php?option=com_k2&view=item&id="
+ newsid[index] + ":&Itemid=223");
} else
Config_GlobalFunction.Message(
Config_GlobalFunction.nowifi, 1);
} else
Main.getUiApplication().pushScreen(
new Main_NewsDetail(newsid[index]));
}
}, 1 * 1000, false);
return true;
}
}