title: FacebookSdk.sdkInitialize(getApplicationContext()) method not worked
body: <p>I'm use Facebook SDK 4.5.1 (import facebook package) <code>FacebookSdk.sdkInitialize(getApplicationContext())</code> not worked...</p>
  
  <p>this is error</p>
  
  <pre><code>java.lang.NoClassDefFoundError: com.facebook.FacebookSdk
  </code></pre>
  
  <p>code is</p>
  
  <pre><code>     @Override
      protected void onCreate(Bundle savedInstanceState) {
          LanguageUtils.LanguageSettings(this);
          FacebookSdk.sdkInitialize(getApplicationContext());
          super.onCreate(savedInstanceState);
          requestWindowFeature(Window.FEATURE_NO_TITLE);
    }
  </code></pre>
  
  <p>My project is older (min Android sdk is 10). I'm use new version sdk (Facebook SDK 4.7.0)  it worked true, But it supported (Android sdk 14 ->)</p>