我已在我的应用中实施了Google登录功能。我试图使用共享首选项保存用户登录详细信息，但我收到以下错误：
1）java.lang.RuntimeException：将结果ResultInfo {who = null，request = 0，result = -1，data = Intent {（has extras）}}传递给活动
2）java.lang.NullPointerException：尝试在空对象引用上调用虚方法'java.lang.String java.lang.String.toString（）'
SocialLogin.java
package com.studypal.khadija.studypal;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import java.util.Arrays;
public class SocialLogin extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener, View.OnClickListener {
private static final String TAG = SocialLogin.class.getSimpleName();
private GoogleApiClient mGoogleApiClient;
private SignInButton mSignInButton;
private static final int RC_SIGN_IN = 0;
private CallbackManager mCallbackManager;
private LoginButton mFbLoginButton;
private LoginManager mLoginManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_social_login);
// [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]
// Build a GoogleApiClient with access to the Google Sign-In API and the options specified by gso.
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
// [END build_client]
// [START customize_button]
// Customize sign-in button. The sign-in button can be displayed in
// multiple sizes and color schemes. It can also be contextually
// rendered based on the requested scopes. For example. a red button may
// be displayed when Google+ scopes are requested, but a white button
// may be displayed when only basic profile is requested.
mSignInButton = (SignInButton) findViewById(R.id.sign_in_button);
mSignInButton.setSize(SignInButton.SIZE_STANDARD);
mSignInButton.setScopes(gso.getScopeArray());
mSignInButton.setOnClickListener(this); //Register button's OnClickListener to sign in the user when clicked
// [END customize_button]
//Facebook Login
mFbLoginButton = (LoginButton) findViewById(R.id.login_button);
mLoginManager = LoginManager.getInstance();
mCallbackManager = CallbackManager.Factory.create();
mFbLoginButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mLoginManager.logInWithReadPermissions(SocialLogin.this, Arrays.asList("public_profile", "email"));
mLoginManager.registerCallback(mCallbackManager,
new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Toast.makeText(SocialLogin.this, "Fb Login Success", Toast.LENGTH_SHORT).show();
redirectToHome();
}
@Override
public void onCancel() {
Toast.makeText(SocialLogin.this, "Fb Login Cancel", Toast.LENGTH_SHORT).show();
}
@Override
public void onError(FacebookException exception) {
Toast.makeText(SocialLogin.this, "Fb Login Error", Toast.LENGTH_SHORT).show();
}
});
}
});
}
// [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);
}
mCallbackManager.onActivityResult(requestCode, resultCode, data);
}
// [END onActivityResult]
/**
* Handle Sign In Result
* @param result
*/
// [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();
String personName = acct.getDisplayName();
String personEmail = acct.getEmail();
String personId = acct.getId();
/* Uri personPhoto = acct.getPhotoUrl();
String idToken = acct.getIdToken();
mIdTokenTextView.setText("ID Token: " + idToken);
*/
SharedPreferences sharedPref = getSharedPreferences("userInfo", Context.MODE_PRIVATE);
SharedPreferences.Editor editor =sharedPref.edit();
editor.putString("username",personName.toString());
editor.putString("email", personEmail.toString());
editor.putString("id",personId.toString());
editor.apply();
Toast.makeText(this, personName+""+personEmail, Toast.LENGTH_SHORT).show();
Toast.makeText(this, "Sign In", Toast.LENGTH_SHORT).show();
redirectToHome();
} else {
// Signed out, show unauthenticated UI.
Toast.makeText(this, "Sign Out", Toast.LENGTH_SHORT).show();
//mIdTokenTextView.setText("ID Token: null");
}
}
// [END handleSignInResult]
//[START signIn]
private void signIn() {
//Starting the intent prompts the user to select a Google account to sign in with.
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
//[END signIn]
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onPause() {
super.onPause();
}
//Handle sign-in button taps by creating a sign-in intent with the getSignInIntent method,
//and starting the intent with startActivityForResult.
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.sign_in_button:
signIn();
break;
}
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
/**
*
*/
private void redirectToHome() {
startActivity(new Intent(SocialLogin.this, NavBaseActivity.class));
finish();
}
}
请有人帮我处理我的代码