持续 Google 登录 Android 工作室

Question

我成功地设置了 google 登录到我的应用程序并且它工作正常。我还添加了一个有效的注销按钮。我面临的问题是，每当我打开该应用程序时，它都要求用户登录 google（或只需按下按钮），然后再转到下一个 activity.我尝试了很多不同的方法来解决这个问题，但 none 似乎有效。有人可以帮我做一个持久的 google 登录，即使用户关闭应用程序，它也会让他们保持登录状态，而且他们永远不会看到登录 activity（除非他们退出）?

这是我的代码 LoginActivity:

public class LoginActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {

    SignInButton signInButton;
    private GoogleApiClient googleApiClient;
    private SharedPreferences prefs;
    private int progress;
    private int SIGN_IN;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_login);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

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

            googleApiClient = new GoogleApiClient.Builder(this).enableAutoManage(this, this)
                    .addApi(Auth.GOOGLE_SIGN_IN_API, gso).build();

            prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
            progress = prefs.getInt("SIGN_IN", 0);
            signInButton = findViewById(R.id.signInWithGoogle);
            signInButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
                    startActivityForResult(intent, SIGN_IN);
                    SharedPreferences.Editor editPrefs = prefs.edit();
                    editPrefs.putInt("SIGN_IN", 1);
                    editPrefs.apply();
                }
            });
        }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }

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

        if(requestCode == SIGN_IN){
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);

            if (result.isSuccess()){
                startActivity(new Intent(LoginActivity.this, StudentInformationFormActivity.class));
                finish();
            } else {
                Toast.makeText(this, "Login Failed!", Toast.LENGTH_SHORT).show();
            }
        }
    }
    @Override
    protected void onPause() {
        super.onPause();
    }
}

Answer 1

我曾经遇到过同样的问题，我查看了我的旧代码，看到了这样的事情：

   @Override
protected void onStart() {
    super.onStart();
    GoogleSignInAccount lastSignedInAccount = GoogleSignIn.getLastSignedInAccount(this);
    if (lastSignedInAccount != null) {
        startActivity(new Intent(LogInActivity.this, MainActivity.class));
        finish();
    }

}

因此您可以检查用户是否登录到 Actovity 的 onStart，如果是，则转到下一个 activity。希望有所帮助:)

持续 Google 登录 Android 工作室

Persistent Google Sign In Android Studio

java

android

authentication

google-signin