java - 在 Android 中集成 Google Plus SignIn 显示意外对话框

Question

我正在尝试将 google plus 登录集成到我的 android 应用程序中。所有 API 调用以及代码都工作正常。但我收到了一个意外的对话框，尽管我的布局 xml 中没有任何内容。

此外，我已经从 Google 开发者网站完成了所有先决条件集成过程。

下面是我的代码:

public class GooglePlusActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {

private static final String TAG = "GooglePlusMainActivity";
private static final int RC_SIGN_IN = 9001;
private GoogleApiClient mPlusClient;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_google_plus);

    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestEmail()
            .build();

    mPlusClient = new GoogleApiClient.Builder(this)
            .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
            .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
            .build();

    signIn();

}

private void signIn() {
    Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mPlusClient);
    startActivityForResult(signInIntent, RC_SIGN_IN);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
    if (requestCode == RC_SIGN_IN) {
        GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
        handleSignInResult(result);
    }
    finish();
}

private void handleSignInResult(GoogleSignInResult result) {
    Log.d(TAG, "handleSignInResult:" + result.isSuccess());
    if (result.isSuccess()) {
        // Signed in successfully, show authenticated UI.
        GoogleSignInAccount currentPerson = result.getSignInAccount();

        if (currentPerson != null) {
                Intent intent = new Intent(GooglePlusActivity.this, RegisterActivity.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                intent.putExtra("socialuserID", currentPerson.getId());
                intent.putExtra("userEmail", currentPerson.getEmail());
                intent.putExtra("userFname", currentPerson.getDisplayName());
                startActivity(intent);

        }

    }
}

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {

}

}

Answer 1

仔细遵循 Google 集成指南:

https://developers.google.com/identity/sign-in/android/start-integrating

您需要:

• 生成 google-services.json 文件并将其添加到/app 目录

• 在项目的 gradle 中添加依赖项:

  dependencies { 
      classpath 'com.google.gms:google-services:2.0.0-alpha6'
  }
  

• 在应用程序 gradle 中添加插件:

  apply plugin: 'com.google.gms.google-services'
  

  和依赖项:

  dependencies {
      compile 'com.google.android.gms:play-services-auth:8.3.0'
  }
  

• 在Activity的onCreate中创建GoogleApiClient:

  GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
          .requestEmail()
          .build();
  
  mGoogleApiClient = new GoogleApiClient.Builder(this)
          .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
          .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
          .build(); 
  

  您的 Activity 需要实现 GoogleApiClient.OnConnectionFailedListener(Android Studio 会通知您)

• 在布局中添加登录按钮:

  <com.google.android.gms.common.SignInButton
  android:id="@+id/sign_in_button"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" />
  

• 将 onClickListener 附加到按钮:

  findViewById(R.id.sign_in_button).setOnClickListener(this);
  

  这会将 View.OnClickListener 的实现添加到 Activity 中

• 创建 onClick 方法:

  @Override
  public void onClick(View v) {
   switch (v.getId()) {
      case R.id.sign_in_button:
            signIn();
            break;
   }
  }
  

• 创建登录方法:

  private void signIn() {
    Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
    startActivityForResult(signInIntent, RC_SIGN_IN);
  }
  

• 添加捕获事件的方法

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
  
    // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
    if (requestCode == RC_SIGN_IN) {
        GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
        handleSignInResult(result);
    }
  }  
  

• 最后处理 SignIn

  private void handleSignInResult(GoogleSignInResult result) {
    Log.d(TAG, "handleSignInResult:" + result.isSuccess());
    if (result.isSuccess()) {
        // Signed in successfully, show authenticated UI.
        GoogleSignInAccount acct = result.getSignInAccount();
        Log.d(TAG, "authenticated " + acct.getDisplayName() + " " + acct.getEmail());
    } else {
        // Signed out, show unauthenticated UI.
        Log.d(TAG, "unAuthenticated");
    }
  }
  

上面的示例可以在没有白色对话框的情况下运行。

您可以引用 Google 示例:https://github.com/googlesamples/google-services/blob/master/android/signin/app/src/main/java/com/google/samples/quickstart/signin/SignInActivity.java如果您有任何疑问