How do I use the ViewPager in AlertDialog? - Android 4.0+

I am trying to show a dialog when the user clicks a button. In a dialog box, I want to create a viewer to display multiple slices.

Please give me an example or tutorial. I have searched and used many code examples. But they still cannot work.

EDIT: My current code

• Class for customizing dialog

  public class ViewPagerInDialog {

  private final ActionBarActivity context;
  private AlertDialog.Builder builder;
  private int currentLv = 1;
  
  private static final int NUM_PAGES = 5;
  private PagerAdapter pagerAdapter;
  private ViewPager pager;
  
  public ViewPagerInDialog(ActionBarActivity context){
      this.context = context;
  }
  
  public void show(){
      builder = new AlertDialog.Builder(context);
      LayoutInflater inflater = LayoutInflater.from(context);
      View view = inflater.inflate(R.layout.level_dialog, null, false);
  
      pager = (ViewPager) view.findViewById(R.id.pager);
      pagerAdapter = new     ScreenSlidePagerAdapter(context.getSupportFragmentManager());
      pager.setAdapter(pagerAdapter);
      pager.setCurrentItem(currentLv - 1);
  
      builder.setView(view);
      builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
              dialog.dismiss();
          }
      });
  
      AlertDialog a = builder.create();
      a.show();
  }
  
        
  
          
          
          
        
  
      

  private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {

  private Fragment currentFragment;
  
  public Fragment getCurrentFragment() {
      return currentFragment;
  }
  
  public ScreenSlidePagerAdapter(FragmentManager fm) {
      super(fm);
  }
  
  @Override
  public Fragment getItem(int position) {
      return new LevelFragment();
  }
  
  @Override
  public void setPrimaryItem(ViewGroup container, int position, Object object) {
      if (getCurrentFragment() != object) {
          currentFragment = ((Fragment) object);
      }
      super.setPrimaryItem(container, position, object);
  }
  
  @Override
  public int getCount() {
      return NUM_PAGES;
  }
  
        
  
          
          
          
        
  
      

  }}

• Dialog Box: LinearLayout contains a ViewPager

  <android.support.v4.view.ViewPager
      android:id="@+id/pager"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@color/blue" />
  
        
  
          
          
          
        
  
      

• LevelFragment:

  Public class LevelFragment extends fragment {

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.experience, container, false);
      return rootView;
  }
  
        
  
          
          
          
        
  
      

  }

=> To show a dialog:

 private void showLevels() {
    ViewPagerInDialog dialog = new ViewPagerInDialog((ActionBarActivity) getActivity());
    dialog.show();
}

      

        
        
        
      

    

This can show dialogue, but only with a blue background. The ViewPager cannot slide like I want.