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我遵循了Facebook SDK for Android 入门教程,并且“if (session.isOpened())”语句从未通过。我的主要活动 java 代码是本教程的精确副本。
我阅读了 hashkey 可能不正确的原因,因此我添加了教程第 4 步的故障排除部分的代码,并将 logcat hashkey 复制到我的 Facebook Dev 帐户,但这没有任何区别。
-我的项目目标:Android 4.3 (18)
-facebook-android-sdk-3.0.2
-java 1.7
-在模拟器中测试

有什么我应该检查的吗?

package com.firstandroidapp;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import com.facebook.*;
import com.facebook.model.*;
import android.widget.TextView;
import android.content.Intent;

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) {
        if (session.isOpened()) {
          Log.d("CHECKPOINT", "Session opened!");

          // 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) {
              if (user != null) {
                TextView welcome = (TextView) findViewById(R.id.welcome);
                welcome.setText("Hello " + user.getName() + "!");
              }
            }
          });
        }
        else
        {
           Log.d("CHECKPOINT", "No open session");
        }
      }
    });
  }

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

}
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