判断当前界面是否是桌面,获取属于桌面的应用

/** 权限:<uses-permission android:name="android.permission.GET_TASKS"/>  
     * 判断当前界面是否是桌面 ,先获取桌面应用的程序包名,然后判断当前显示活动包名是否包含在内
     */  
    private boolean isHome() {  
        ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);  
        List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1);  
        return getHomes().contains(rti.get(0).topActivity.getPackageName());  
    }  
  
    /** 
     * 获得属于桌面的应用的应用包名称 
     * @return 返回包含所有桌面应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);  
            //属于桌面的应用:com.android.launcher(启动器)
            System.out.println("属于桌面的应用:"+ri.activityInfo.packageName);

        }  
        return names;  
    }