title: How to make Horizontal ListView
body: <p>I want to make a Horizontal listview, but i don't want to use the library of third-party. So, i try to use PagerAdapter but i can do it. 
  I don't know how to fix it.
  This is my code i use to load photo:</p>
  
  <pre><code>public class GalleryActivity extends AppCompatActivity {
  public static final String TAG = "GalleryActivity";
  public static final String EXTRA_NAME = "images";
  ArrayList&lt;Actor&gt; actors = new ArrayList&lt;&gt;();
  private GalleryPagerAdapter _adapter;
  
  @InjectView(R.id.pager) ViewPager _pager;
  @InjectView(R.id.thumbnails) LinearLayout _thumbnails;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_gallery);
      ButterKnife.inject(this);
  
      importActor();
  
      _adapter = new GalleryPagerAdapter(this);
      _pager.setAdapter(_adapter);
      _pager.setOffscreenPageLimit(6);
  
  }
  
  public void importActor(){
      Bitmap bitmap = BitmapFactory.decodeResource(GalleryActivity.this.getResources(), R.drawable.nhaphuong);
      Bitmap bitmap1 = BitmapFactory.decodeResource(GalleryActivity.this.getResources(),R.drawable.subo);
      Bitmap bitmap2 = BitmapFactory.decodeResource(GalleryActivity.this.getResources(),R.drawable.truonggiang);
  
      Actor actor = new Actor(5,"Nhã Phương",bitmap);
      Actor actor1 = new Actor(15,"Trường Giang",bitmap2);
      Actor actor2 = new Actor(999,"Subo",bitmap1);
  
      actors.add(actor);
      actors.add(actor1);
      actors.add(actor2);
  }
  
  
  class GalleryPagerAdapter extends PagerAdapter {
  
      Context _context;
      LayoutInflater _inflater;
  
      public GalleryPagerAdapter(Context context) {
          _context = context;
          _inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      }
  
      @Override
      public int getCount() {
          return actors.size();
      }
  
      @Override
      public boolean isViewFromObject(View view, Object object) {
          return view == ((RelativeLayout) object);
      }
  
      @Override
      public Object instantiateItem(ViewGroup container, final int position) {
          View view = _inflater.inflate(R.layout.one_actor, container, false);
          container.addView(view);
  
          // Get the border size to show around each image
          int borderSize = _thumbnails.getPaddingTop();
  
          // Get the size of the actual thumbnail image
          int thumbnailSize = ((FrameLayout.LayoutParams)
                  _pager.getLayoutParams()).bottomMargin - (borderSize*2);
  
          // Set the thumbnail layout parameters. Adjust as required
          LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(thumbnailSize, thumbnailSize);
          params.setMargins(0, 0, borderSize, 0);
  
          OneActor oneActor = new OneActor();
          oneActor.avatar = (ImageView) view.findViewById(R.id.imgActor);
          oneActor.name = (TextView) view.findViewById(R.id.tvActorName);
          oneActor.cmtCount = (TextView) view.findViewById(R.id.tvCmtCount);
          view.setTag(oneActor);
          oneActor.avatar.setImageBitmap(actors.get(position).getAvatar());
          oneActor.cmtCount.setText(actors.get(position).getCmtcout() + "");
          oneActor.name.setText(actors.get(position).getName());
  
          return view;
      }
  
      @Override
      public void destroyItem(ViewGroup container, int position, Object object) {
          container.removeView((LinearLayout) object);
      }
      class OneActor{
          ImageView avatar;
          TextView name, cmtCount;
      }
  }
  </code></pre>
  
  <p>This is my xml file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitsSystemWindows="true"&gt;
  &lt;HorizontalScrollView
      android:layout_width="match_parent"
      android:layout_height="72dp"
      android:layout_gravity="center"&gt;
      &lt;LinearLayout
          android:id="@+id/thumbnails"
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          android:gravity="center_vertical"
          android:orientation="horizontal"
          android:paddingTop="2dp"/&gt;
  &lt;/HorizontalScrollView&gt;
  </code></pre>
  
  <p></p>
  
  <p>Tell my how to fix it or give me a tutoral please!</p>