android 判断当前界面是否是桌面

 1    /**
      * 获得当前活动APP的包名
      *
      * @return 返回当前活动界面是不是桌面
      */
     private boolean isHomeWin()
     {
         ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
         List<RunningTaskInfo> lstRti = mActivityManager.getRunningTasks(1);
         return getHomes().contains(lstRti.get(0).topActivity.getPackageName());
     }

     /**
      * 获得属于桌面的应用的应用包名称
      *
      * @return 返回包含所有包名的字符串列表
      */
     private List<String> getHomes() {
         List<String> packages = 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) {
             packages.add(ri.activityInfo.packageName);
         }
         return packages;
     }

在浮动窗口开发中，经常要用到该判断，如果在桌面的时候才显示浮动窗口。