Facebook SDK登录回调从未称为android

Question

I am using the following code snippet in my Android app to allow users to login into my app using Facebook:

public class FacebookLoginActivity extends AppCompatActivity {
private CallbackManager callbackManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(this.getApplicationContext());
    initCallback();
    LoginManager.getInstance().logInWithReadPermissions(this, FacebookUtils.requiredPermissions);
}

private void initCallback() {
    callbackManager = CallbackManager.Factory.create();
    LoginManager.getInstance().registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                   AccessToken.setCurrentAccessToken(loginResult.getAccessToken());

                @Override
                public void onCancel() {

                }

                @Override
                public void onError(FacebookException exception) {

                }

            }
    );
}

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

}

However, it's not working because the defined Callback methods are never called, I am shown the facebook loader and I am reaching onActivityResult but the callbacks are never called, does anyone know what might be the problem? thanks in advance.

Answer 1

Try below code:

public class FacebookLoginActivity extends AppCompatActivity {
private CallbackManager callbackManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(this.getApplicationContext());
    callbackManager = CallbackManager.Factory.create();
    initCallback();

    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new OnClickLinew View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // add this on facebook sign in button click listener
            LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("public_profile","email"));
        }
    });
}

private void initCallback() {
    LoginManager.getInstance().registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                   AccessToken.setCurrentAccessToken(loginResult.getAccessToken());

                @Override
                public void onCancel() {

                }

                @Override
                public void onError(FacebookException exception) {

                }

            }
    );
}

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

Answer 2

Try this steps.

Create new Variable for LoginButton define it Globally.

private LoginButton btnLogin;

Then on your onCreate add this Code.

btnLogin.setReadPermissions(Arrays.asList("public_profile, email, user_birthday"));
callbackManager = CallbackManager.Factory.create();

Also change this.

LoginManager.getInstance().registerCallback(callbackManager,

To this.

btnLogin.registerCallback(callbackManager,