错误包`com.google.android.gms...` 不存在

我是 Android 开发的新手.我正在学习使用 Parse.com 后端服务并很早就陷入困境.

I am new to Android development. I am learning to use Parse.com backend service and get stuck early on.

我正在按照 教程 创建使用 Google Maps Android API v2 的应用程序.我做了什么:

I am following tutorial to create application that uses Google Maps Android API v2. What I've done :

1. 下载示例项目来自解析
2. 将 AnyWall-android\Anywall 文件夹从下载的项目导入到 Android Studio
3. 重建项目

1. download sample project from parse
2. Import AnyWall-android\Anywall folder from downloaded project to Android Studio
3. Rebuild project

然后我在这里收到一堆错误:

Then I get a bunch of errors here :

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.location.LocationClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap.CancelableCallback;
import com.google.android.gms.maps.GoogleMap.OnCameraChangeListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.Circle;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

common、location 和 maps 突出显示为红色.问题是如何解决这些错误?

common, location, and maps highlighted red. The question is how to resolve these errors?

我感谢任何形式的帮助或指导(我应该检查什么?是否与缺少库有关?如果是，我应该添加什么库以及从哪里获取它?)

I appreciate any kind of help or direction (What should I check? Is it about missing library? If it is, what library should I add and where to get it?)