本文介绍了BitmapField点击不会对黑莓应用工作的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我安排7 bimapfield水平,如果我点击bitmapfield它要推另一屏幕下面是我的code,但余did't得到另一个屏幕任何一个可以帮助我什么是错在这code
BitmapField bitmap1 =新BitmapField(
Bitmap.getBitma $ P $的PSource(profile_n.png),可聚焦| DrawStyle.HCENTER)
{
保护无效的onfocus(INT方向)
{
rollno = 1;
。this.getScreen()无效();
}
保护无效onUnfocus()
{ }
保护布尔navigationClick(INT的地位,诠释时间){
。UiApplication.getUiApplication()popScreen(getScreen());
。UiApplication.getUiApplication()pushScreen(新AccMainScreen());
返回true;
}
};
解决方案
您可以使用容纳图像的自定义字段,并像一个按钮,而不是bitmapfield。
这里是code,我建议:
进口net.rim.device.api.system.Bitmap;
进口net.rim.device.api.ui.Field;
进口net.rim.device.api.ui.Graphics;
公共类的CustomButton扩展字段{ 保护位图的图标;
保护INT fieldWidth;
保护INT fieldHeight; 公众的CustomButton(字符串iconSource,长样式){
超(样式);
图标= Bitmap.getBitma $ P $的PSource(iconSource);
fieldHeight = icon.getHeight();
fieldWidth = icon.getWidth();
} 公众诠释的get preferredWidth(){
返回fieldWidth;
} 公众诠释的get preferredHeight(){
返回fieldHeight;
}
保护无效布局(INT为arg0,ARG1 INT){
setExtent(GET preferredWidth(),获得preferredHeight());
}
保护无效DRAWFOCUS(图形显卡,布尔){} 保护无效漆(图形图像){
graphics.fillRect(0,0,fieldWidth,fieldHeight);
graphics.drawBitmap(0,0,fieldWidth,fieldHeight,图标,0,0);
}
保护布尔navigationClick(INT的地位,诠释时间){
fieldChangeNotify(0);
返回true;
}
}
您可以使用该按钮就像一个默认的按钮,并通过使用setChangeListener功能改变它的听众。
的CustomButton A按钮=新的CustomButton(图形/ someIcon.png);
aButton.setChangeListener(新FieldChangeListener(){
公共无效fieldChanged(场场,诠释上下文){
。UiApplication.getUiApplication()popScreen(getScreen());
。UiApplication.getUiApplication()pushScreen(新AccMainScreen());
}
});
i arranged 7 bimapfield in horizontal if i click the bitmapfield it want to push the another screen Here is my code but i did't get the another screen can any one help me whats wrong in this code
BitmapField bitmap1 = new BitmapField(
Bitmap.getBitmapResource("profile_n.png"),FOCUSABLE | DrawStyle.HCENTER)
{
protected void onFocus(int direction)
{
rollno=1;
this.getScreen().invalidate();
}
protected void onUnfocus()
{
}
protected boolean navigationClick(int status, int time){
UiApplication.getUiApplication().popScreen(getScreen());
UiApplication.getUiApplication().pushScreen(new AccMainScreen());
return true;
}
};
解决方案
You can use a custom field that hold a image and behave like a button instead of bitmapfield.Here is the code i suggest:
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Graphics;
public class CustomButton extends Field{
protected Bitmap icon;
protected int fieldWidth;
protected int fieldHeight;
public CustomButton (String iconSource,long style) {
super(style);
icon = Bitmap.getBitmapResource(iconSource);
fieldHeight = icon.getHeight();
fieldWidth = icon.getWidth();
}
public int getPreferredWidth() {
return fieldWidth;
}
public int getPreferredHeight() {
return fieldHeight;
}
protected void layout(int arg0, int arg1) {
setExtent(getPreferredWidth(), getPreferredHeight());
}
protected void drawFocus(Graphics graphics, boolean on){ }
protected void paint(Graphics graphics) {
graphics.fillRect(0, 0, fieldWidth, fieldHeight);
graphics.drawBitmap(0,0, fieldWidth, fieldHeight, icon, 0, 0);
}
protected boolean navigationClick(int status, int time) {
fieldChangeNotify(0);
return true;
}
}
you can use this button like a default button and change listener of it by using setChangeListener function.
CustomButton aButton = new CustomButton ("graphics/someIcon.png");
aButton.setChangeListener(new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
UiApplication.getUiApplication().popScreen(getScreen());
UiApplication.getUiApplication().pushScreen(new AccMainScreen());
}
});
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