判斷當前界面是否是桌面,獲取屬於桌面的應用

/** 權限:<uses-permission android:name="android.permission.GET_TASKS"/>  
     * 判斷當前界面是否是桌面 ,先獲取桌面應用的程序包名,然后判斷當前顯示活動包名是否包含在內
     */  
    private boolean isHome() {  
        ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);  
        List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1);  
        return getHomes().contains(rti.get(0).topActivity.getPackageName());  
    }  
  
    /** 
     * 獲得屬於桌面的應用的應用包名稱 
     * @return 返回包含所有桌面應用的包名的字符串列表 
     */  
    private List<String> getHomes() {  
        List<String> names = new ArrayList<String>();  
        PackageManager packageManager = this.getPackageManager();  
        Intent intent = new Intent(Intent.ACTION_MAIN);  
        intent.addCategory(Intent.CATEGORY_HOME);  
        List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent,  
                PackageManager.MATCH_DEFAULT_ONLY);  
        for (ResolveInfo ri : resolveInfo) {  
            names.add(ri.activityInfo.packageName);  
            //屬於桌面的應用:com.android.launcher(啟動器)
            System.out.println("屬於桌面的應用:"+ri.activityInfo.packageName);

        }  
        return names;  
    }