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我尝试了很多，现在我需要你的帮助。我想要做的是以下几点： 当黑莓应用程序启动yes/no对话框时弹出。 如果用户选择“是”，则执行一些操作并在启动后继续。如果用户选择“否”退出应用程序。Blackberry - 启动时显示对话框，并等到对话框关闭
我写了一个SSCCE，如果选择“是”，那么应该振动，之后你应该听到声音。当然我知道，在调用Alert.vibrate（）后代码会继续运行，并且不会等待振动完成。无论如何，这只是一个例子。在声音播放之前，应该首先调用vibrate（），并且应该完全处理dialogClosed（）。
SSCCE是我到目前为止。我尝试了很多其他的东西。我相信它不会那么困难。我只是不明白。
这就是：
package TestDialog;
import net.rim.device.api.system.Alert;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.DialogClosedListener;
public class TestDialog extends UiApplication
{
public static short[] SOUND_ALERT = { 523, 200, //C for 200ms
0, 200, //Pause 200ms
554, 200, //C# 200ms
0, 200, //Pause 200ms
587, 200, //D 200ms
0, 200, //Pause 200ms
622, 200 //D# 200ms
};
/**
* @param args
*/
public static void main(final String[] args)
{
final TestDialog test = new TestDialog();
test.enterEventDispatcher();
}
public TestDialog()
{
//the dialog
final Dialog d = new Dialog(Dialog.D_YES_NO, "vibrate?", Dialog.OK, Bitmap.getPredefinedBitmap(Bitmap.QUESTION), Dialog.FIELD_TOP);
d.setDialogClosedListener(new DialogClosedListener()
{
public void dialogClosed(final Dialog dialog, final int choice)
{
if (d.getSelectedValue() == Dialog.YES)
{
Alert.startVibrate(2000);
//do something which takes some time
}
else
{
System.exit(0);
}
}
});
//show the dialog
showDialog(d);
//now wait for the dialog to call notify
try
{
synchronized (this)
{
this.wait();
}
}
catch (final Exception e)
{
System.out.println(e.getMessage());
}
//finally AFTER the dialog has been closed and everything in dialogClosed() has been done, play a sound
Alert.startAudio(SOUND_ALERT, 100);
}
private void showDialog(final Dialog d)
{
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
d.doModal();
this.notify();
}
});
}
}
OK，其他一些SSCCE。这将启动并显示一个对话框，但随后抛出IllegalMonitorExcpetion：
package TestDialog;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;
public class TestDialog extends UiApplication
{
public static short[] SOUND_ALERT = { 523, 200, //C for 200ms
0, 200, //Pause 200ms
554, 200, //C# 200ms
0, 200, //Pause 200ms
587, 200, //D 200ms
0, 200, //Pause 200ms
622, 200 //D# 200ms
};
/**
* @param args
*/
public static void main(final String[] args)
{
final TestDialog test = new TestDialog();
test.enterEventDispatcher();
}
public TestDialog()
{
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
//the dialog
final Dialog d = new Dialog(Dialog.D_YES_NO, "vibrate?", Dialog.OK, Bitmap.getPredefinedBitmap(Bitmap.QUESTION), Dialog.FIELD_TOP);
if (d.doModal() == Dialog.YES)
{
System.out.println("selection made yes");
this.notify();
}
else
{
System.out.println("selection made no");
System.exit(0);
}
}
});
try
{
this.wait();
}
catch (final Exception e)
{
e.printStackTrace();
}
//finally AFTER the dialog has been closed and everything in dialogClosed() has been done, play a sound
System.out.println("done");
}
}
所以我把一个synchronized块周围的wait（）调用，因为我读，该对象必须调用wait（）时进行同步。但现在应用程序什么也没有显示它运行主要方法，但某处停止。在模拟器中会发生很奇怪的事情：当模拟器仍然处于启动状态并且在显示器上写入“调试器附加”时，会调用该应用程序的主要方法。那么，这里是带有同步块的SSCCE。仍然不起作用。
package TestDialog;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;
public class TestDialog extends UiApplication
{
public static short[] SOUND_ALERT = { 523, 200, //C for 200ms
0, 200, //Pause 200ms
554, 200, //C# 200ms
0, 200, //Pause 200ms
587, 200, //D 200ms
0, 200, //Pause 200ms
622, 200 //D# 200ms
};
/**
* @param args
*/
public static void main(final String[] args)
{
final TestDialog test = new TestDialog();
test.enterEventDispatcher();
}
public TestDialog()
{
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
//the dialog
final Dialog d = new Dialog(Dialog.D_YES_NO, "vibrate?", Dialog.OK, Bitmap.getPredefinedBitmap(Bitmap.QUESTION), Dialog.FIELD_TOP);
if (d.doModal() == Dialog.YES)
{
System.out.println("selection made yes");
this.notify();
}
else
{
System.out.println("selection made no");
System.exit(0);
}
}
});
synchronized (this)
{
try
{
this.wait();
}
catch (final Exception e)
{
e.printStackTrace();
}
}
//finally AFTER the dialog has been closed and everything in dialogClosed() has been done, play a sound
System.out.println("done");
}
}
最后我试着利用忙碌的等待。仍然没有成功。对话框不会弹出。即使在主线程的while循环中使用Thread.sleep（1000），UI线程似乎也不起作用。这里是繁忙的等待的SSCCE：
package TestDialog;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;
public class TestDialog extends UiApplication
{
/**
* @param args
*/
public static void main(final String[] args)
{
final TestDialog test = new TestDialog();
test.enterEventDispatcher();
}
private volatile boolean _blocked = true;
public TestDialog()
{
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
//the dialog
final Dialog d = new Dialog(Dialog.D_YES_NO, "vibrate?", Dialog.OK, Bitmap.getPredefinedBitmap(Bitmap.QUESTION), Dialog.FIELD_TOP);
if (d.doModal() == Dialog.YES)
{
System.out.println("selection made yes");
_blocked = false;
}
else
{
System.out.println("selection made no");
System.exit(0);
}
}
});
while (_blocked)
{
try
{
Thread.sleep(1000);
}
catch (final Exception e)
{
//safety catch
}
}
finish();
}
private void finish()
{
System.out.println("done");
}
}
感谢您的帮助。
Haferblues
供参考。我在这里的BB论坛也问过这个问题：http://supportforums.blackberry.com/t5/Java-Development/Startup-YES-NO-Dialog-should-stop-the-launchign-process-of-the/td -p/1725071我将尽快为这两个论坛提供解决方案。我希望这是好的，因为我真的需要帮助。 – haferblues