App登录页面未显示 - Android Facebook

Question

我正试图访问Facebook上的应用程序登录屏幕.当活动开始时,屏幕显示Facebook加载页面然后消失,页面设置为R.layout.main.

我必须忽略这一点,但是如何进入应用登录页面以便用户登录.

我一直在关注https://developers.facebook.com/docs/mobile/android/build/#enablesso上的教程

仅供参考 - 我删除了APP_ID

package com.example.facebook;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;

import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;


public class MyGreatActivity extends Activity {

    Facebook facebook = new Facebook("APP_ID");
    private SharedPreferences mPrefs;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        /*
         * Get existing access_token if any
         */
        mPrefs = getPreferences(MODE_PRIVATE);
        String access_token = mPrefs.getString("access_token", null);
        long expires = mPrefs.getLong("access_expires", 0);
        if(access_token != null) {
            facebook.setAccessToken(access_token);
        }
        if(expires != 0) {
            facebook.setAccessExpires(expires);
        }

        /*
         * Only call authorize if the access_token has expired.
         */
        if(!facebook.isSessionValid()) {

            facebook.authorize(this, new String[] {}, new DialogListener() {
                @Override
                public void onComplete(Bundle values) {
                    SharedPreferences.Editor editor = mPrefs.edit();
                    editor.putString("access_token", facebook.getAccessToken());
                    editor.putLong("access_expires", facebook.getAccessExpires());
                    editor.commit();
                }

                @Override
                public void onFacebookError(FacebookError error) {}

                @Override
                public void onError(DialogError e) {}

                @Override
                public void onCancel() {}
            });
        }
    }

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

        facebook.authorizeCallback(requestCode, resultCode, data);
    }
}

谢谢您的帮助.

Answer 1

似乎您的手机包含Facebook Native App,因此,它可能会在Logcat中引发登录失败的无效密钥错误.

如果由于单点登录而发生问题..所以你需要创建Android Key Hash并在你的应用程序中注册.

请按照此步骤执行此操作.

您可以在单行中禁用单点登录,无需使用创建哈希键,但不建议这样处理.

添加-1或Facebook.FORCE_DIALOG_AUTH以进行授权()

facebookObject.authorize(context, PERMISSIONS,Facebook.FORCE_DIALOG_AUTH,new LoginListener());