Google 登录 android

Question

我尝试了 google 开发者文档并尝试登录我的应用程序。代码是从 git 中复制的，并添加了 documentation. 中的代码并在 LoginActivity 中定义为

Public class LoginActivity extends AppCompatActivity implements
    GoogleApiClient.OnConnectionFailedListener,
    View.OnClickListener {

private static final String TAG = "* * SignIn * *";
private static final int RC_SIGN_IN = 9001;

private GoogleApiClient mGoogleApiClient;
private ProgressDialog mProgressDialog;
Bundle userData = new Bundle();
Intent newIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login);
   findViewById(R.id.sign_in_button).setOnClickListener(this);


    // [START configure_signin]
    // Configure sign-in to request the user's ID, email address, and basic
    // profile. ID and basic profile are included in DEFAULT_SIGN_IN.
    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestEmail()
            .build();
    // [END configure_signin]

    // [START build_client]
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
            .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
            .build();
    // [END build_client]

    // [START customize_button]
    SignInButton signInButton = (SignInButton) findViewById(R.id.sign_in_button);
    signInButton.setSize(SignInButton.SIZE_STANDARD);
    signInButton.setScopes(gso.getScopeArray());
    // [END customize_button]
}

@Override
public void onStart() {
    super.onStart();

    OptionalPendingResult<GoogleSignInResult> opr = Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient);
    if (opr.isDone()) {
        Log.d(TAG, "Got cached sign-in");
        GoogleSignInResult result = opr.get();
        handleSignInResult(result);
    } else {

        showProgressDialog();
        opr.setResultCallback(new ResultCallback<GoogleSignInResult>() {
            @Override
            public void onResult(GoogleSignInResult googleSignInResult) {
                hideProgressDialog();
                handleSignInResult(googleSignInResult);
            }
        });
    }
}

// [START onActivityResult]
@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);
    }
}
// [END onActivityResult]

// [START handleSignInResult]
private void handleSignInResult(GoogleSignInResult result) {
    Log.d(TAG, "handleSignInResult:" + result.isSuccess());
    if (result.isSuccess()) {
        // Signed in successfully, show authenticated UI.
        GoogleSignInAccount acct = result.getSignInAccount();
        userData.putString("Username", acct.getDisplayName());
        userData.putString("Email",acct.getEmail());
        newIntent = new Intent(LoginActivity.this, MainActivity.class);
        newIntent.putExtras(userData);
        startActivity(newIntent);
        finish();
    } else {
        userData.putString("Username", "Anonymous");
        userData.putString("Email","www.example.com");
        newIntent = new Intent(LoginActivity.this, MainActivity.class);
        newIntent.putExtras(userData);
        startActivity(newIntent);
        finish();
    }
}
// [END handleSignInResult]

// [START signIn]
private void signIn() {
    Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
    startActivityForResult(signInIntent, RC_SIGN_IN);
}
// [END signIn]





@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
            Log.d(TAG, "onConnectionFailed:" + connectionResult);
}

private void showProgressDialog() {
    if (mProgressDialog == null) {
        mProgressDialog = new ProgressDialog(this);
        mProgressDialog.setMessage("Please wait");
        mProgressDialog.setIndeterminate(true);
    }

    mProgressDialog.show();
}

private void hideProgressDialog() {
    if (mProgressDialog != null && mProgressDialog.isShowing()) {
        mProgressDialog.hide();
    }
}
@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.sign_in_button:
            signIn();
            break;

    }
}

}

但是我得到以下错误log. 作为

12-16 23:02:44.074 5545-5545/com.example.www.newapp E/AndroidRuntime: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=40962, result=-1, data=Intent { (has extras) }} 
                                                                     to activity {com.example.www.newapp/com.google.android.gms.auth.api.signin.internal.SignInHubActivity}: 
                                                                    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference

我的MainActivity代码是

public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener, View.OnClickListener {
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    View header = navigationView.getHeaderView(0);
    userName = (TextView) header.findViewById(R.id.userName);
    userName.setText(user);//Username recieved through intent
}}

虽然运行它在模拟器中显示更新您的播放服务，这是一个问题吗？

Answer 1

使用新的play service 8.3编译时只在模拟器中出现错误虽然在实际硬件中测试没有显示任何问题。这是由于模拟器中的播放服务版本与 API 不匹配。希望他们用最新的播放服务升级 Google API SDK 并发布一些通知。

Google 登录 android

Google SIgn-In for android

android

google-api-java-client

android-activity

google-play-services

google-signin