我对哈希键和所有内容都有很多问题,我认为我已经解决了所有这些问题,因为我的会话已经处于OPENED状态.

我现在遇到的问题是,在我登录facebook后,当会话已经打开时,代码执行Request.executeMeRquestAsync()并且它永远不会进入onComplete()部分……任何想法？

这是代码……

package com.example.firstandroidapp;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.Signature;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.widget.TextView;


import com.facebook.Request;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.model.GraphUser;

public class MainActivity extends Activity {
@Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // start Facebook Login
    Session.openActiveSession(this,true,new Session.StatusCallback() {

      // callback when session changes state
      @Override
      public void call(Session session,SessionState state,Exception exception) {
          try {
                PackageInfo info = getPackageManager().getPackageInfo("com.example.firstandroidapp",PackageManager.GET_SIGNATURES);
                for (Signature signature : info.signatures) {
                    MessageDigest md = MessageDigest.getInstance("SHA");
                    md.update(signature.toByteArray());
                    Log.i("Digest: ",Base64.encodetoString(md.digest(),0));
                }
            } catch (NameNotFoundException e) {
                Log.e("Test",e.getMessage());
            } catch (NoSuchAlgorithmException e) {
                Log.e("Test",e.getMessage());
            }

          if (session.isOpened()) {

          // make request to the /me API
          Request.executeMeRequestAsync(session,new Request.GraphUserCallback() {

            // callback after Graph API response with user object
            @Override
            public void onCompleted(GraphUser user,Response response) {
              // it never gets here...
                  if (user != null) {
                TextView welcome = (TextView) findViewById(R.id.welcome);
                welcome.setText("Hello " + user.getName() + "!");
              }
            }
          });
        }
      }
    });
  }

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

}

Thanx非常提前.
大卫.

该教程告诉我们修改AndroidManifest.xml.在修改中,我将下面的标记放在错误的位置(我没有使用Eclipse来修改清单文件),这阻止了回调.

<manifest ...>
  ...
  <application ...>
    ...
    <activity android:name="com.facebook.LoginActivity"/>
    ...
    <Meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/app_id"/>
    ...
  </application>
  ...
  <uses-permission android:name="android.permission.INTERNET"/>
  ...
</manifest>

尝试仔细检查您的AndroidManifest.xml. The official document会有所帮助.