黑莓 - 如何获得后台应用程序ID [英] Blackberry - How to get the background application process id

问题描述

在我的黑莓模拟器I M运行在后台两个应用现在我想以检索这些都是background.I运行不如何做应用程序。是否有可能表明这是在后台运行的应用程序。

In my blackberry simulator i m running two application at the background now i want to retrive which are the application running in the background.I don't how to do. Is it possible to show which are the application running in the background.

推荐答案

• 要列出所有可见的应用程序使用<一个href=\"http://www.blackberry.com/developers/docs/4.5.0api/net/rim/device/api/system/ApplicationManager.html#getVisibleApplications%28%29\"相对=nofollow> ApplicationManager.getVisibleApplications（）


• 要带来一定的应用前景利用<一个href=\"http://www.blackberry.com/developers/docs/4.5.0api/net/rim/device/api/system/ApplicationManager.html#requestForeground%28int%29\"相对=nofollow> ApplicationManager.requestForeground（进程ID）

List and switch visible application

• To list all visible applications use ApplicationManager.getVisibleApplications()
• To bring some application foreground use ApplicationManager.requestForeground(processId)



code：

class Scr extends MainScreen {

    ApplicationDescriptor[] mAppDes;

    public Scr() {
    	listApplications();
    }

    void listApplications() {
    	ApplicationManager appMan = 
    		ApplicationManager.getApplicationManager();
    	mAppDes = appMan.getVisibleApplications();
    	add(new LabelField("Visible Applications:"));
    	for (int i = 0; i < mAppDes.length; i++) {
    		boolean isFG = appMan.getProcessId(mAppDes[i]) == appMan
    				.getForegroundProcessId();
    		String text = (isFG ? "[F]:" : "[B]") + mAppDes[i].getName();
    		add(new LabelField(text));
    	}
    }

    protected void makeMenu(Menu menu, int instance) {
    	super.makeMenu(menu, instance);
    	menu.add(refreshApps);
    	makeAppMenuItems(menu);
    }

    MenuItem refreshApps = new MenuItem("Refresh", 0, 0) {
    	public void run() {
    		deleteAll();
    		listApplications();
    	}
    };

    class AppMenuItem extends MenuItem {
    	ApplicationDescriptor mAppDes;
    	public AppMenuItem(ApplicationDescriptor appDes) {
    		super(appDes.getName(), 100000, 100000);
    		mAppDes = appDes;
    	}
    	public void run() {
    		ApplicationManager appMan = ApplicationManager
    				.getApplicationManager();
    		int processId = appMan.getProcessId(mAppDes);
    		appMan.requestForeground(processId);
    	}
    }

    void makeAppMenuItems(Menu menu) {
    	for (int i = 0, cnt = mAppDes.length; i < cnt; i++)
    		menu.add(new AppMenuItem(mAppDes[i]));
    }
}

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