一、注册应用

SHA-1 必须添加

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二、下载配置文件

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三、添加SDK


1. 项目级 build.gradle

  1. buildscript {
  2.   dependencies {
  3.     // Add this line
  4.     classpath 'com.google.gms:google-services:4.2.0'
  5.   }
  6. }

2. 应用级 build.gradle

  1. dependencies {
  2.   // Add this line
  3.   implementation 'com.google.firebase:firebase-core:16.0.9'
  4.     implementation 'com.google.firebase:firebase-auth:16.1.0'
  5.     implementation 'com.google.android.gms:play-services-auth:16.0.1'
  6. }
  7. ...
  8. // Add to the bottom of the file
  9. apply plugin: 'com.google.gms.google-services'

四、启用Google登录功能

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五、使用 Firebase 进行Google身份验证

  1. private static final String TAG = "MainActivity";
  2. private int RC_SIGN_IN = 1;
  4. private GoogleSignInClient mGoogleSignInClient;
  5. private FirebaseAuth mAuth;
  7. @Override
  8. protected void onCreate(Bundle savedInstanceState) {
  9.     super.onCreate(savedInstanceState);
  10.     setContentView(R.layout.activity_main);
  12.     GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
  13.         // 服务器的客户端 ID
  14.         .requestIdToken(getString(R.string.default_web_client_id))
  15.         .requestEmail()
  16.         .build();
  18.     mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
  20.     mAuth = FirebaseAuth.getInstance();
  22.     // 谷歌登录按钮
  23.     findViewById(R.id.btn_login).setOnClickListener(new View.OnClickListener() {
  24.         @Override
  25.         public void onClick(View v) {
  26.             signIn();
  27.         }
  28.     });
  30. }
  32. /**
  33.  * 调用谷歌登陆
  34.  */
  35. private void signIn() {
  36.     Intent signInIntent = mGoogleSignInClient.getSignInIntent();
  37.     startActivityForResult(signInIntent, RC_SIGN_IN);
  38. }
  40. @Override
  41. public void onActivityResult(int requestCode, int resultCode, Intent data) {
  42.     super.onActivityResult(requestCode, resultCode, data);
  44.     //
  45.     if (requestCode == RC_SIGN_IN) {
  46.         Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
  47.         try {
  48.             // 谷歌登陆成功，获取谷歌账号信息
  49.             GoogleSignInAccount account = task.getResult(ApiException.class);
  50.             firebaseAuthWithGoogle(account);
  51.         } catch (ApiException e) {
  52.             // 谷歌登录失败
  53.             Log.e(TAG, "Google sign in failed", e);
  54.         }
  55.     }
  56. }
  58. private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
  59.     Log.d(TAG, "firebaseAuthWithGoogle:" + acct.getId());
  61.     // showProgressDialog();
  63.     // 异步任务
  64.     AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
  65.     mAuth.signInWithCredential(credential)
  66.         .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
  67.             @Override
  68.             public void onComplete(@NonNull Task<AuthResult> task) {
  69.                 if (task.isSuccessful()) {
  70.                     // 登录成功
  71.                     Log.d(TAG, "signInWithCredential:success");
  72.                     final FirebaseUser user = mAuth.getCurrentUser();
  73.                     Log.d(TAG, "uid:" + user.getUid());
  74.                     Log.d(TAG, "email:" + user.getEmail());
  75.                     Log.d(TAG, "name:" + user.getDisplayName());
  76.                     Log.d(TAG, "phone:" + user.getPhoneNumber());
  77.                     Log.d(TAG, "providerid:" + user.getProviderId());
  78.                     Toast.makeText(MainActivity.this, user.getUid(), Toast.LENGTH_SHORT).show();
  79.                 } else {
  80.                     // 登录失败
  81.                     Log.e(TAG, "signInWithCredential:failure", task.getException());
  82.                     Toast.makeText(MainActivity.this, "Authentication Failed.", Toast.LENGTH_SHORT).show();
  83.                 }
  85.                 // hideProgressDialog();
  86.             }
  87.         });
  88. }

六、常见问题

1. 12500异常

添加支持电子邮件地址地址

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