title: Strange behavior in implementing LEFT_RIGHT sliding menu
body: <p><strong>Dears,</strong> </p>
  
  <p>I'm new to Android, and try to use SlidingMenu in my project. 
  I want to create an application with two sliding menus same as Facebook.</p>
  
  <p>With these steps I had crated my application: </p>
  
  <ol>
  <li>Download and add SlidingMenu library into my work-space. </li>
  <li>Download and add actionbarsherlock library to my work-space.</li>
  <li>In SlidingMenu library I add actionbarsherlock as a reference library. </li>
  <li>In SlidingMenu library, I extend <code>SlidingActivity.java</code> with actionbarsherlock: 
  <code>public class SlidingActivity extends SherlockActivity  implements SlidingActivityBase</code></li>
  <li>In my application, I add reference to SlidingMenu library.</li>
  <li>In my application, I extend my main activity to use <code>SlidingActivity</code> :
  <code>public class MainMenu extends SlidingActivity</code></li>
  </ol>
  
  <p><strong>My main activity code:</strong></p>
  
  <pre><code>import android.app.ActionBar;
  import android.os.Bundle;
  import android.view.KeyEvent;
  
  import com.actionbarsherlock.view.MenuInflater;
  import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;
  import com.jeremyfeinstein.slidingmenu.lib.app.SlidingActivity;
  
  public class MainMenu extends SlidingActivity {
      SlidingMenu  menu;
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
          if (enableHomeIconActionBack() || enableHomeIconActionSlidingMenu()) {
              ActionBar actionBar = getActionBar();
              if (actionBar != null){
                  actionBar.setDisplayHomeAsUpEnabled(true);
              }
          }
  
          setContentView(R.layout.activity_main_menu);
          setBehindContentView(R.layout.activity_main_menu);
  
          menu = new SlidingMenu(this);
          menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
          menu.setMode(SlidingMenu.LEFT_RIGHT);
          menu.setShadowWidthRes(R.dimen.sliding_menu_shadow_width);
          menu.setShadowDrawable(R.drawable.shadow);
          menu.setBehindOffsetRes(R.dimen.sliding_menu_offset);
          menu.setFadeDegree(0.35f);
          menu.attachToActivity(this, SlidingMenu.SLIDING_WINDOW);
          menu.setMenu(R.layout.sliding_menu_frame);
  
          menu.setSecondaryMenu(R.layout.vehicles_tree);
          menu.setSecondaryShadowDrawable(R.drawable.shadow);
      }
  
  
      @Override
      public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
          MenuInflater inflater = getSupportMenuInflater();
          inflater.inflate(R.menu.main_menu, menu);
          return true;
      }
  
      @Override
      public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
          switch (item.getItemId()) {
          case android.R.id.home:
              if (enableHomeIconActionSlidingMenu()
                      &amp;&amp; menu != null) {
                  menu.toggle();
              } else if (enableHomeIconActionBack()) {
                  onCustomBackPressed();
              }
              return true;
          default:
              return super.onOptionsItemSelected(item);
          }
      }   
  
      @Override
      public boolean onKeyDown(int keyCode, KeyEvent event) {
          switch (keyCode) {
          case KeyEvent.KEYCODE_BACK:
              onCustomBackPressed();
              return true;
          default:
              return super.onKeyDown(keyCode, event);
          }
      }
  
      // If sliding menu is showing, we need to hide it on the first back button
      // press.
      private void onCustomBackPressed() {
          if (menu != null
                  &amp;&amp; menu.isMenuShowing()) {
              menu.toggle();
          } else {
              this.onBackPressed();
          }
      }
  
      /**
       * Sets activity home icon to have up icon and on press act as device back
       * button press.
       * 
       * @return Activation state.
       */
      public boolean enableHomeIconActionBack() {
          return true;
      }
  
      /**
       * Sets activity home icon to be as a sliding menu invoke icon and on press
       * call toggle command for the sliding menu.
       * 
       * @return Activation state.
       */
      public boolean enableHomeIconActionSlidingMenu() {
          return true;
      }   
  }
  </code></pre>
  
  <p>Now, <code>menu.setMenu(R.layout.sliding_menu_frame);</code> will show: </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="#FFFF00FF" &gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>And <code>menu.setSecondaryMenu(R.layout.vehicles_tree);</code> will show: </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent" 
      android:background="#FF0F00FF"&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p><strong>The following snapshots describe the strange behavior:</strong> </p>
  
  <p><a href="http://img27.imageshack.us/img27/4166/47ry.jpg" rel="nofollow">Click to show image</a></p>
  
  <ol>
  <li>Main activity. </li>
  <li>When you swipe <strong>right</strong> on the <strong>screen</strong>.</li>
  <li>When you swipe <strong>left</strong> on the <strong>screen</strong>. </li>
  <li>When you swipe <strong>right</strong> from <strong>left screen edge</strong>. This activity covers the entire screen and it is showing the activity attached to <code>setBehindContentView(R.layout.activity_main_menu);</code>, I noticed that by changing the attached layout. </li>
  </ol>
  
  <p>I don't want the forth screen, what I'm doing wrong? </p>
  
  <p>Regards,,
  Ali Alaswad</p>