本文介绍了黑莓应用程序启动画面的处理方法,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
我工作的一个BlackBerry应用程序需要一个闪屏作为应用程序启动。我还没有找到实现闪屏的例子。
I am working on a BlackBerry application which requires a splash screen as the application starts. I have not found any examples that implement a splash screen.
我已经在启动类应用程序,以显示开机画面中使用的计时器。
有没有解决这个问题的任何其他方式?
I have used a timer at the start class of the application to display the splash image.Is there any other way around this problem?
推荐答案
要创建一个BlackBerry智能手机应用程序启动画面,MainScreen类必须扩展性,关键性,导航事件需要被消耗,并且可以使用计时器一定时间后取消该屏幕。
To create a splash screen for a BlackBerry smartphone application, the MainScreen class must be extended, key and navigation events need to be consumed, and a timer can be used to dismiss the screen after a certain amount of time.
public class SplashScreen extends MainScreen {
private MainScreen next;
private UiApplication application;
private Timer timer = new Timer();
private static final Bitmap _bitmap = Bitmap.getBitmapResource("image.png");
public SplashScreen(UiApplication ui, MainScreen next) {
super(Field.USE_ALL_HEIGHT | Field.FIELD_LEFT);
this.application = ui;
this.next = next;
this.add(new BitmapField(_bitmap));
SplashScreenListener listener = new SplashScreenListener(this);
this.addKeyListener(listener);
timer.schedule(new CountDown(), 5000);
application.pushScreen(this);
}
public void dismiss() {
timer.cancel();
application.popScreen(this);
application.pushScreen(next);
}
private class CountDown extends TimerTask {
public void run() {
DismissThread dThread = new DismissThread();
application.invokeLater(dThread);
}
}
private class DismissThread implements Runnable {
public void run() {
dismiss();
}
}
protected boolean navigationClick(int status, int time) {
dismiss();
return true;
}
protected boolean navigationUnclick(int status, int time) {
return false;
}
protected boolean navigationMovement(int dx, int dy, int status, int time) {
return false;
}
public static class SplashScreenListener implements
KeyListener {
private SplashScreen screen;
public boolean keyChar(char key, int status, int time) {
//intercept the ESC and MENU key - exit the splash screen
boolean retval = false;
switch (key) {
case Characters.CONTROL_MENU:
case Characters.ESCAPE:
screen.dismiss();
retval = true;
break;
}
return retval;
}
public boolean keyDown(int keycode, int time) {
return false;
}
public boolean keyRepeat(int keycode, int time) {
return false;
}
public boolean keyStatus(int keycode, int time) {
return false;
}
public boolean keyUp(int keycode, int time) {
return false;
}
public SplashScreenListener(SplashScreen splash) {
screen = splash;
}
}
}
这篇关于黑莓应用程序启动画面的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!