如果用户已经登录,我在应用程序中使用Google登录会遇到问题。当我第一次登录时,它会很好,因为它会询问我密码和其他信息,但是如果用户已经登录,我会变瘦通常它应该打开像下面这样的选择帐户菜单:
[截图] [https://androidclarified.com/wp-content/uploads/2018/11/Screenshot_2018-11-11-20-53-15-306_com.google.android.gms_-768x1365.png]
但是我的情况如下: [problem-gif] [https://gph.is/g/ZYBxy14]
public class LoginActivity extends AppCompatActivity implements
View.OnClickListener{
private static final String TAG = "LoginActivity1";
private static final int RC_SIGN_IN = 9001;
private GoogleSignInClient mGoogleSignInClient;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
SignInButton signInButton = findViewById(R.id.sign_in_button);
signInButton.setOnClickListener(this);
}
private void signIn() {
Toast.makeText(this, "button works", Toast.LENGTH_SHORT).show();
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, RC_SIGN_IN);
}
private void signOut() {
mGoogleSignInClient.signOut()
.addOnCompleteListener(this, new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
// [START_EXCLUDE]
updateUI(null);
// [END_EXCLUDE]
}
});
}
private void updateUI(@Nullable GoogleSignInAccount account) {
if (account != null) {
Log.d(TAG, account.getDisplayName());
} else {
Log.d(TAG, "account is null");
}
}
@Override
public void onStart() {
super.onStart();
// [START on_start_sign_in]
// Check for existing Google Sign In account, if the user is already signed in
// the GoogleSignInAccount will be non-null.
GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
updateUI(account);
// [END on_start_sign_in]
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInClient.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
handleSignInResult(task);
}
}
private void handleSignInResult(Task<GoogleSignInAccount> completedTask) {
try {
GoogleSignInAccount account = completedTask.getResult(ApiException.class);
// Signed in successfully, show authenticated UI.
updateUI(account);
} catch (ApiException e) {
// The ApiException status code indicates the detailed failure reason.
// Please refer to the GoogleSignInStatusCodes class reference for more information.
Log.d(TAG, "signInResult:failed code=" + e.getStatusCode());
updateUI(null);
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.sign_in_button:
signIn();
break;
}
}
}
答案 0 :(得分:0)
您已经在onStart()回调方法中调用了 getLastSignedInAccount 方法。因此,当您成功登录gmail帐户后,每次进行此活动后,都不会显示“帐户选择”对话框。所以,不用担心。
您可以通过以下代码注销用户。那么您将获得与第一次相同的登录模式。
private void signOut() {
mGoogleSignInClient.signOut()
.addOnCompleteListener(this, new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
// ...
}
});
}