[翻译]GooglePlayServicesUtil Google服务工具类

http://developer.android.com/reference/com/google/android/gms/common/GooglePlayServicesUtil.html

java.lang.Object
↳	com.google.android.gms.common.GooglePlayServicesUtil

这个工具类是用来检查设备是否安装以及最新的Google Play Service的,和执行PlusClient或者GoogleAuthUtil连接服务一样.

Constants 常量
String	GOOGLE_PLAY_SERVICES_PACKAGE	Package name for Google Play services.    谷歌服务包名
int	GOOGLE_PLAY_SERVICES_VERSION_CODE	Minimum Google Play services package version (declared in AndroidManifest.xml android:versionCode) in order to be compatible with this client version.　　　　   最小版本号
String	GOOGLE_PLAY_STORE_PACKAGE	Package name for Google Play services.       谷歌商店包名

ConnectionResult 错误号对应

int	DATE_INVALID	The device date is likely set incorrectly.
int	DEVELOPER_ERROR	The application is misconfigured.
int	DRIVE_EXTERNAL_STORAGE_REQUIRED	The Drive API requires external storage (such as an SD card), but no external storage is mounted.
int	INTERNAL_ERROR	An internal error occurred.
int	INVALID_ACCOUNT	The client attempted to connect to the service with an invalid account name specified.
int	LICENSE_CHECK_FAILED	The application is not licensed to the user.
int	NETWORK_ERROR	A network error occurred.
int	RESOLUTION_REQUIRED	Completing the connection requires some form of resolution.
int	SERVICE_DISABLED	The installed version of Google Play services has been disabled on this device.
int	SERVICE_INVALID	The version of the Google Play services installed on this device is not authentic.
int	SERVICE_MISSING	Google Play services is missing on this device.
int	SERVICE_VERSION_UPDATE_REQUIRED	The installed version of Google Play services is out of date.
int	SIGN_IN_REQUIRED	The client attempted to connect to the service but the user is not signed in.
int	SUCCESS	The connection was successful.

该工具类方法:

Public Methods
static Dialog	getErrorDialog(int errorCode, Activity activity, int requestCode, DialogInterface.OnCancelListener cancelListener) Returns a dialog to address the provided errorCode.
static Dialog	getErrorDialog(int errorCode, Activity activity, int requestCode) Returns a dialog to address the provided errorCode.
static PendingIntent	getErrorPendingIntent(int errorCode, Context context, int requestCode) Returns a PendingIntent to address the provided errorCode.
static String	getErrorString(int errorCode) Returns a human-readable string of the error code returned from isGooglePlayServicesAvailable(Context).
static String	getOpenSourceSoftwareLicenseInfo(Context context) Returns the open source software license information for the Google Play services application, or null if Google Play services is not available on this device.
static Context	getRemoteContext(Context context) This gets the Context object of the Buddy APK.
static Resources	getRemoteResource(Context context) This gets the Resources object of the Buddy APK.
static int	isGooglePlayServicesAvailable(Context context) Verifies that Google Play services is installed and enabled on this device, and that the version installed on this device is no older than the one required by this client.
static boolean	isUserRecoverableError(int errorCode) Determines whether an error is user-recoverable.

public static int isGooglePlayServicesAvailable (Context context)

根据上下文来检测谷歌服务是否安装并且正常可用,且安装的版本号不低于该应用的版本

根据检测到的不同情况返回下面的值(类型 ConnectionResult):

 SUCCESS, SERVICE_MISSING, SERVICE_VERSION_UPDATE_REQUIRED, SERVICE_DISABLED, SERVICE_INVALID, DATE_INVALID.

public static Dialog getErrorDialog (int errorCode, Activity activity, int requestCode, DialogInterface.OnCancelListener cancelListener)

errorCode : 根据错误号,获取错误对话框,如果 isGooglePlayServicesAvailable(Context) ==SUCCESS 则返回null

activity :需要在哪里显示该对话框的对象

cancelListener : 对话框的监听器,当点击取消时添加指定动作(更新服务?退出?)

public static Dialog getErrorDialog (int errorCode, Activity activity, int requestCode)  同上

public static PendingIntent getErrorPendingIntent (int errorCode, Context context, int requestCode)

根据错误号,上下文等获取 PendingIntent

public static String getErrorString (int errorCode)

根据错误号来获取错误号所对应的字符值

public static String getOpenSourceSoftwareLicenseInfo (Context context)

获取谷歌服务软件版权声明信息

public static Context getRemoteContext (Context context)

获取远程操作的上下文对象

public static Resources getRemoteResource (Context context)

public static boolean isUserRecoverableError (int errorCode)

判断这个错误号是否可以覆盖,如果可以就进行对话框提示