Android Facebook SDK-重新启动后如何保持登录状态

Question

I'm using the facebok SDK and a BootReceiver which is triggered when the boot sequence has completed:

public class BootReceiver extends BroadcastReceiver {

I presume that a user is logged in when:

public boolean isLoggedIn() {
    return AccessToken.getCurrentAccessToken() != null;
}

However, this always returns as false.

How can I resume a user's session and keep them logged in after a reboot? This needs to be done within the boot receiver to check if a user was previously logged in, and provide access to:

Profile.getCurrentProfile()

Answer 1

You can try to logOut before perform a login inside the broadcastReceiver. This will ensure you have the user logged in

    LoginManager loginManager = LoginManager.getInstance();
    loginManager.logOut();
    loginManager.logInWithReadPermissions(...);

    loginManager.registerCallback(...);

Answer 2

I figured it out!

It seems to work if I set up an Asynchronous call to refresh the access token, then check if the user was logged in:

@Override
public void onReceive(Context context, Intent intent) {
    if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
        AccessToken.refreshCurrentAccessTokenAsync(new AccessToken.AccessTokenRefreshCallback() {
            @Override
            public void OnTokenRefreshed(AccessToken accessToken) {
                System.out.println("Refresh succeed");
                AccessToken.setCurrentAccessToken(accessToken);
                if (isLoggedIn()) {
                    System.out.println("User is logged in");
                    doCoolStuffHere();
                } else {
                    System.out.println("User is not logged in");
                }
            }

            @Override
            public void OnTokenRefreshFailed(FacebookException exception) {
                System.out.println("Refresh failed");
            }
        });
    }
}