谷歌登录API： https://developers.google.com/identity/sign-in/android/
1、注册并且登录google网站
https://accounts.google.com/
2、进入google开发者平台创建应用
https://developers.google.com/mobile/add?platform=android&cntapi=signin&cntapp=Default%20Demo%20App&cntpkg=com.google.samples.quickstart.signin&cnturl=https:%2F%2Fdevelopers.google.com%2Fidentity%2Fsign-in%2Fandroid%2Fstart%3Fconfigured%3Dtrue&cntlbl=Continue%20with%20Try%20Sign-In
3、在开发者平台填写响应的信息，包括 应用名、包名、签名的SHA-1值
图1
图2
图3
4、在项目中添加谷歌服务
4.1、在SDK Manager 里面下载 google service
4.2、在project目录下的build.gradle下添加
classpath 'com.google.gms:google-services:2.1.0-alpha4'
查看最新版本号：https://jcenter.bintray.com/com/google/gms/google-services/
4.3 在model目录下的build.gradle下添加
compile 'com.google.android.gms:play-services-auth:8.4.0'
5、代码实现
5.1、在布局文件中
1 <com.google.android.gms.common.SignInButton
2 android:id="@+id/google_signIn_bt"
3 android:layout_width="wrap_content"
4 android:layout_height="wrap_content" />
5
6 <Button
7 android:id="@+id/google_loginOut_bt"
8 android:layout_width="match_parent"
9 android:layout_height="wrap_content"
10 android:text="google退出登录"
11 android:layout_gravity="center"
12 android:gravity="center"
13 >
14 </Button>
5.2、java代码
1 package com.pegasus.map.presentation.ui.activity;
2
3 import android.content.Intent;
4 import android.os.Bundle;
5 import android.view.View;
6 import android.widget.Button;
7
8 import com.google.android.gms.auth.api.Auth;
9 import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
10 import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
11 import com.google.android.gms.auth.api.signin.GoogleSignInResult;
12 import com.google.android.gms.common.ConnectionResult;
13 import com.google.android.gms.common.SignInButton;
14 import com.google.android.gms.common.api.GoogleApiClient;
15 import com.google.android.gms.common.api.ResultCallback;
16 import com.google.android.gms.common.api.Status;
17 import com.pegasus.map.R;
18 import com.pegasus.map.presentation.ui.base.BaseActivity;
19
20 import butterknife.Bind;
21 import butterknife.ButterKnife;
22
23 /**
24 * Created by ${zyj} on 2016/3/24.
25 * 登录
26 */
27
28 public class LoginActivity1 extends BaseActivity implements GoogleApiClient.OnConnectionFailedListener , View.OnClickListener {
29
30 public int RequestCode = 10 ;
31
32 @Bind( R.id.google_signIn_bt )
33 public SignInButton google_signIn_bt ;
34
35 @Bind( R.id.google_loginOut_bt )
36 public Button google_loginOut_bt ;
37
38 public GoogleSignInOptions gso ;
39 public GoogleApiClient mGoogleApiClient ;
40
41 @Override
42 protected void onCreate(Bundle savedInstanceState) {
43 super.onCreate(savedInstanceState);
44 setContentView(R.layout.activity_login);
45 ButterKnife.bind(this);
46 init();
47 }
48
49
50 private void init() {
51 //初始化谷歌登录服务
52 gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
53 .requestEmail() //获取邮箱
54 .requestId() //获取id 号
55 .requestIdToken("456212545785") //获取token
56 .build();
57
58 // Build a GoogleApiClient with access to GoogleSignIn.API and the options above.
59 mGoogleApiClient = new GoogleApiClient.Builder( this )
60 .enableAutoManage( this , this )
61 .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
62 .build();
63
64 //登录
65 google_signIn_bt.setSize(SignInButton.SIZE_STANDARD);
66 google_signIn_bt.setScopes(gso.getScopeArray());
67 google_signIn_bt.setOnClickListener(this) ;
68
69 //退出
70 google_loginOut_bt.setOnClickListener(this) ;
71
72 }
73
74 @Override
75 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
76 super.onActivityResult(requestCode, resultCode, data);
77
78 //谷歌登录成功回调
79 if ( requestCode == RequestCode ) {
80 GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
81 handleSignInResult( result ) ;
82 }
83 }
84
85 @Override
86 public void onConnectionFailed(ConnectionResult connectionResult) {
87
88 }
89
90 @Override
91 public void onClick(View v) {
92 switch ( v.getId() ){
93 case R.id.google_signIn_bt : //登录
94 signIn();
95 break;
96
97 case R.id.google_loginOut_bt :
98 signOut();
99 break;
100 }
101 }
102
103 /**
104 * 登录
105 */
106 private void signIn() {
107 Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
108 startActivityForResult(signInIntent, RequestCode );
109 }
110
111 /**
112 * 退出
113 */
114 private void signOut() {
115 Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(
116 new ResultCallback<Status>() {
117 @Override
118 public void onResult(Status status) {
119 // ...
120 }
121 });
122 }
123
124 private void handleSignInResult(GoogleSignInResult result) {
125 if (result.isSuccess()) {
126 // Signed in successfully, show authenticated UI.
127 GoogleSignInAccount acct = result.getSignInAccount();
128 //获取用户名
129 String name = acct.getDisplayName() ;
130 String email = acct.getEmail() ;
131 String token = acct.getIdToken() ;
132 String id = acct.getId() ;
133
134 } else {
135 // Signed out, show unauthenticated UI.
136 }
137 }
138
139 }
6、Google SDK 二次封装
1 package com.pegasus.map.presentation.utils;
2
3 import android.content.Intent;
4 import android.support.v4.app.FragmentActivity;
5 import android.util.Log;
6 import android.widget.Toast;
7
8 import com.google.android.gms.auth.api.Auth;
9 import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
10 import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
11 import com.google.android.gms.auth.api.signin.GoogleSignInResult;
12 import com.google.android.gms.common.api.GoogleApiClient;
13 import com.google.android.gms.common.api.ResultCallback;
14 import com.google.android.gms.common.api.Status;
15 import com.pegasus.map.R;
16
17 /**
18 * Created by ${zyj} on 2016/3/30.
19 */
20 public class GoogleLogin {
21
22 public int requestCode = 10 ;
23 private FragmentActivity activity ;
24 public GoogleSignInOptions gso ;
25 public GoogleApiClient mGoogleApiClient ;
26 public GoogleApiClient.OnConnectionFailedListener listener ;
27 private GoogleSignListener googleSignListener ;
28
29 public GoogleLogin(FragmentActivity activity , GoogleApiClient.OnConnectionFailedListener listener ){
30 this.activity = activity ;
31 this.listener = listener ;
32
33 //初始化谷歌登录服务
34 gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
35 .requestEmail()
36 .requestId()
37 .requestIdToken( activity.getString(R.string.google_server_client_id))
38 .requestProfile()
39 .build();
40
41 // Build a GoogleApiClient with access to GoogleSignIn.API and the options above.
42 mGoogleApiClient = new GoogleApiClient.Builder( activity )
43 .enableAutoManage( activity , listener )
44 .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
45 .build();
46 }
47
48
49 /**
50 * 登录
51 */
52 public void signIn() {
53 Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
54 activity.startActivityForResult(signInIntent, requestCode);
55 }
56
57 /**
58 * 退出登录
59 */
60 public void signOut() {
61 Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(
62 new ResultCallback<Status>() {
63 @Override
64 public void onResult(Status status) {
65 if ( status.isSuccess() ){
66 if ( googleSignListener != null ){
67 googleSignListener.googleLogoutSuccess();
68 }
69 }else {
70 if ( googleSignListener!= null ){
71 googleSignListener.googleLogoutFail();
72 }
73 }
74 }
75 });
76 }
77
78 public String handleSignInResult(GoogleSignInResult result) {
79 String res = "" ;
80 if (result.isSuccess()) {
81 //登录成功
82 GoogleSignInAccount acct = result.getSignInAccount();
83 res = "登录成功"
84 + "用户名为：" + acct.getDisplayName()
85 + " 邮箱为：" + acct.getEmail()
86 + " token为：" + acct.getIdToken()
87 + " 头像地址为：" + acct.getPhotoUrl()
88 + " Id为：" + acct.getId()
89 + " GrantedScopes为：" + acct.getGrantedScopes() ;
90 Log.e("res", "res:"+res);
91 Toast.makeText( activity, res, Toast.LENGTH_SHORT).show();
92 if ( googleSignListener != null ){
93 googleSignListener.googleLoginSuccess();
94 }
95 } else {
96 // Signed out, show unauthenticated UI.
97 res = "-1" ; //-1代表用户退出登录了 ， 可以自定义
98 Toast.makeText( activity , "退出登录", Toast.LENGTH_SHORT).show();
99 if ( googleSignListener != null ){
100 googleSignListener.googleLoginFail();
101 }
102 }
103 return res ;
104 }
105
106
107 public void setGoogleSignListener( GoogleSignListener googleSignListener ){
108 this.googleSignListener = googleSignListener ;
109 }
110
111 public interface GoogleSignListener {
112 void googleLoginSuccess();
113 void googleLoginFail() ;
114 void googleLogoutSuccess();
115 void googleLogoutFail() ;
116 }
117
118 }
注意：当你把 GoogleLogin 类复制到你项目中的时候，activity.getString(R.string.google_server_client_id) 这一句会报错，可以先不用管，在6.5 部分会做说明
6.1 在activity里使用封装类
activity 实现 GoogleApiClient.OnConnectionFailedListener , GoogleLogin.GoogleSignListener 两个接口
6.2
//初始化谷歌登录服务
GoogleLogin googleLogin = new GoogleLogin( this , this ) ;
googleLogin.setGoogleSignListener(this);
6.3
1 @Override
2 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
3 super.onActivityResult(requestCode, resultCode, data);
4
5 //谷歌登录成功回调
6 if (requestCode == googleLogin.requestCode ) {
7 GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
8 googleLogin.handleSignInResult( result ) ;
9 }
10 }
6.4
1 //登录
2 googleLogin.signIn();
3
4 //退出
5 googleLogin.signOut();
6.5 获取 google_server_client_id ， 并在strings 里面配置
https://console.developers.google.com/projectselector/apis/credentials
在上面的网站里选择
点击选择项目，然后选择你创建的app，进入下面一个界面，得到对应的Client ID
补充：（2016/8/9）
有很多人留言或者发私信说一直登陆失败。然后我就自己写了一个demo，核心代码完全复制博客里面的 GoogleLogin (代码见第六个标题， 6、Google SDK 二次封装) 里面的代码，真的是一行代码都没有改,完完全全复制的。最后实现登陆成功，可见博客里面的代码是没有问题的。我在操作过程中，有几个关键的地方提一下。
1、权限问题
只需要添加联网权限即可 <uses-permission android:name="android.permission.INTERNET"></uses-permission>
2、签名问题
在开发者后台创建app的时候，需要添加 SHA-1的值，这个值是从你的签名里面获取的。注意，在你运行demo的时候，如果直接运行是不行的，因为直接运行，android studio 会为你的app使用默认签名，这个签名是系统自带的，这个签名的SHA-1值肯定和你真正的签名文件SHA-1值不一样，所以必然会登录失败。 你需要修改你的app debug 时的签名和 发布时的签名一直就好了。
