我希望用户使用Google登录，然后将他们的信息写入我的Firebase数据库。然后，如果此用户退出，然后使用其他Google帐户重新登录，则此信息将作为新条目写入同一Firebase数据库。目前的问题是，在将条目写入数据库之前，用户需要注销然后返回两次，然后覆盖（而不是作为新条目添加）。
MainActivity.class
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.SyncStateContract;
import android.support.annotation.NonNull;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInClient;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.common.api.ApiException;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthCredential;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.auth.GoogleAuthProvider;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
class MainActivity extends BaseActivity implements
View.OnClickListener {
private static final String TAG = "GoogleActivity";
private static final String LOG_TAG = "Logs";
private static final int RC_SIGN_IN = 9001;
FirebaseUser currentUser;
User user;
// [START declare_auth]
private FirebaseAuth mAuth;
// [END declare_auth]
private GoogleSignInClient mGoogleSignInClient;
private TextView mStatusTextView;
private TextView mDetailTextView;
private TextView mDetailTextViewTwo;
DatabaseReference myRef;
FirebaseDatabase database;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// mDatabase = FirebaseDatabase.getInstance().getReference();
// mUsersReference = mTheReference.child("Users").child(userId);
//hide action bar
// getSupportActionBar().hide();
getSupportActionBar().setElevation(0);
// Views
mStatusTextView = findViewById(R.id.status);
mDetailTextView = findViewById(R.id.detail);
mDetailTextViewTwo = findViewById(R.id.detail_two);
// Button listeners
findViewById(R.id.sign_in_button).setOnClickListener(this);
findViewById(R.id.sign_out_button).setOnClickListener(this);
findViewById(R.id.disconnect_button).setOnClickListener(this);
String url = "https://mydbstring";
DatabaseReference ref = FirebaseDatabase.getInstance().getReferenceFromUrl(url);
// [START config_signin]
// Configure Google Sign In
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
// [END config_signin]
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
// [START initialize_auth]
mAuth = FirebaseAuth.getInstance();
// [END initialize_auth]
}
// [START on_start_check_user]
@Override
public void onStart() {
super.onStart();
// Check if user is signed in (non-null) and update UI accordingly.
currentUser = mAuth.getCurrentUser();
updateUI(currentUser);
}
// [END on_start_check_user]
// [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) {
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
// Google Sign In was successful, authenticate with Firebase
GoogleSignInAccount account = task.getResult(ApiException.class);
firebaseAuthWithGoogle(account);
if(currentUser != null){
writeToDb(currentUser.getDisplayName(), currentUser.getEmail(),currentUser.getPhoneNumber(), currentUser.getProviderId(), currentUser.getUid(),currentUser.getPhotoUrl().toString());
loadSecondActivity();
}
} catch (ApiException e) {
// Google Sign In failed, update UI appropriately
Log.w(TAG, "Google sign in failed", e);
// [START_EXCLUDE]
updateUI(null);
// [END_EXCLUDE]
}
}
}
// [END onactivityresult]
// [START auth_with_google]
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
Log.d(TAG, "firebaseAuthWithGoogle:" + acct.getId());
// [START_EXCLUDE silent]
showProgressDialog();
// [END_EXCLUDE]
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
// Sign in success, update UI with the signed-in user's information
Log.d(TAG, "signInWithCredential:success");
currentUser = mAuth.getCurrentUser();
updateUI(currentUser);
} else {
// If sign in fails, display a message to the user.
Log.w(TAG, "signInWithCredential:failure", task.getException());
// Snackbar.make(findViewById(R.id.main_layout), "Authentication Failed.", Snackbar.LENGTH_SHORT).show();
updateUI(null);
}
// [START_EXCLUDE]
hideProgressDialog();
// [END_EXCLUDE]
}
});
}
// [END auth_with_google]
// [START signin]
private void signIn() {
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, RC_SIGN_IN);
Log.d(LOG_TAG, "sign in completed");
//
}
// [END signin]
private void signOut() {
// Firebase sign out
mAuth.signOut();
// Google sign out
mGoogleSignInClient.signOut().addOnCompleteListener(this,
new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
updateUI(null);
}
});
FirebaseAuth.getInstance().signOut();
database = null;
myRef = null;
}
private void revokeAccess() {
// Firebase sign out
mAuth.signOut();
// Google revoke access
mGoogleSignInClient.revokeAccess().addOnCompleteListener(this,
new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
updateUI(null);
}
});
// database = null;
// myRef = null;
}
private void updateUI(FirebaseUser user) {
hideProgressDialog();
if (user != null) {
mStatusTextView.setText(getString(R.string.google_status_fmt, user.getEmail()));
mDetailTextView.setText(getString(R.string.firebase_status_fmt, user.getUid()));
mDetailTextViewTwo.setText(user.getDisplayName());
findViewById(R.id.sign_in_button).setVisibility(View.GONE);
findViewById(R.id.sign_out_and_disconnect).setVisibility(View.VISIBLE);
} else {
mStatusTextView.setText(R.string.signed_out);
mDetailTextView.setText(null);
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
findViewById(R.id.sign_out_and_disconnect).setVisibility(View.GONE);
}
}
@Override
public void onClick(View v) {
int i = v.getId();
if (i == R.id.sign_in_button) {
signIn();
} else if (i == R.id.sign_out_button) {
signOut();
} else if (i == R.id.disconnect_button) {
revokeAccess();
}
}
public void writeToDb(String displayName, String email, String phoneNumber, String providerId, String uId, String photoUrl){
database = FirebaseDatabase.getInstance();
myRef = database.getReference("Users");
User user = new User(displayName, email, phoneNumber, providerId, uId, photoUrl);
myRef.child("Name").setValue(user.getDisplayName());
myRef.child("Email").setValue(user.getEmail());
myRef.child("Phonenumber").setValue(user.getPhoneNumber());
myRef.child("ProviderId").setValue(user.getProviderId());
myRef.child("uId").setValue(user.getuId());
myRef.child("photoUrl").setValue(user.getPhotoUrl().toString());
}
public void loadSecondActivity(){
Intent myIntent = new Intent(MainActivity.this, SecondActivity.class);
MainActivity.this.startActivity(myIntent);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
User.class
import android.net.Uri;
public class User {
private String displayName;
private String email;
private String phoneNumber;
private String providerId;
private String uId;
private String photoUrl;
public User(){
}
public User(String displayName, String email, String phoneNumber, String providerId, String uId, String photoUrl) {
this.displayName = displayName;
this.email = email;
this.phoneNumber = phoneNumber;
this.providerId = providerId;
this.uId = uId;
this.photoUrl = photoUrl;
}
public String getDisplayName() {
return displayName;
}
public String getEmail() {
return email;
}
public String getPhoneNumber() {
return phoneNumber;
}
public String getProviderId() {
return providerId;
}
public String getuId() {
return uId;
}
public String getPhotoUrl() {
return photoUrl;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public void setEmail(String email) {
this.email = email;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
public void setProviderId(String providerId) {
this.providerId = providerId;
}
public void setuId(String uId) {
this.uId = uId;
}
public void setPhotoUrl(String photoUrl) {
this.photoUrl = photoUrl;
}
}
答案 0 :(得分：1)
而不是
myRef.child("Name").setValue(user.getDisplayName());
myRef.child("Email").setValue(user.getEmail());
myRef.child("Phonenumber").setValue(user.getPhoneNumber());
myRef.child("ProviderId").setValue(user.getProviderId());
myRef.child("uId").setValue(user.getuId());
myRef.child("photoUrl").setValue(user.getPhotoUrl().toString());
使用：
myRef.push().setValue(user);
每次插入新用户数据时，Push都会生成唯一键
答案 1 :(得分：1)
使用此行。
myRef.push().setValue(user);
这对你有用。感谢