2、activity_horizontallistview.xml

3、activity代码

package ivan.com.appbackendtest; import android.content.Context;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView; import java.util.ArrayList;import java.util.Arrays;import java.util.List; /** * Created by ivan on 2017/6/9. */ public class HorizontalListviewActivity extends AppCompatActivity { private RecyclerView recyclerview_horizontal1; private GalleryAdapter mAdapter1; private RecyclerView recyclerview_horizontal2; private GalleryAdapter mAdapter2; private RecyclerView recyclerview_horizontal3; private GalleryAdapter mAdapter3; private List mDatas1; private List mDatas2; private List mDatas3; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_horizontallistview);  initDatas();  //得到控件  recyclerview_horizontal1 = (RecyclerView)findViewById(R.id.recyclerview_horizontal1);  //设置布局管理器  LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);  linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);  recyclerview_horizontal1.setLayoutManager(linearLayoutManager);  //设置适配器  mAdapter1 = new GalleryAdapter(this, mDatas1);  recyclerview_horizontal1.setAdapter(mAdapter1);   //得到控件  recyclerview_horizontal2 = (RecyclerView)findViewById(R.id.recyclerview_horizontal2);  //设置布局管理器  LinearLayoutManager linearLayoutManager2 = new LinearLayoutManager(this);  linearLayoutManager2.setOrientation(LinearLayoutManager.HORIZONTAL);  recyclerview_horizontal2.setLayoutManager(linearLayoutManager2);  //设置适配器  mAdapter2 = new GalleryAdapter(this, mDatas2);  recyclerview_horizontal2.setAdapter(mAdapter2);   //得到控件  recyclerview_horizontal3 = (RecyclerView)findViewById(R.id.recyclerview_horizontal3);  //设置布局管理器  LinearLayoutManager linearLayoutManager3 = new LinearLayoutManager(this);  linearLayoutManager3.setOrientation(LinearLayoutManager.HORIZONTAL);  recyclerview_horizontal3.setLayoutManager(linearLayoutManager3);  //设置适配器  mAdapter3 = new GalleryAdapter(this, mDatas3);  recyclerview_horizontal3.setAdapter(mAdapter3); } private void initDatas() {  mDatas1 = new ArrayList<>(Arrays.asList(R.mipmap.ic_launcher));  mDatas2 = new ArrayList<>(Arrays.asList(R.mipmap.ic_launcher,R.mipmap.ic_launcher));  mDatas3 = new ArrayList<>(Arrays.asList(R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher,R.mipmap.ic_launcher)); } public class GalleryAdapter extends   RecyclerView.Adapter {  private LayoutInflater mInflater;  private List mDatas;   public GalleryAdapter(Context context, List datats)  {   mInflater = LayoutInflater.from(context);   mDatas = datats;  }   public class ViewHolder extends RecyclerView.ViewHolder  {   public ViewHolder(View arg0)   {    super(arg0);   }    ImageView mImg;   TextView mTxt;  }   @Override  public int getItemCount()  {   return mDatas.size();  }   /**   * 创建ViewHolder   */  @Override  public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i)  {   View view = mInflater.inflate(R.layout.item_listview,     viewGroup, false);   ViewHolder viewHolder = new ViewHolder(view);    viewHolder.mImg = (ImageView) view     .findViewById(R.id.id_index_gallery_item_image);   return viewHolder;  }  /**   * 设置值   */  @Override  public void onBindViewHolder(final ViewHolder viewHolder, final int i)  {   viewHolder.mImg.setImageResource(mDatas.get(i));  } }}

4、核心代码

//得到控件  recyclerview_horizontal1 = (RecyclerView)findViewById(R.id.recyclerview_horizontal1);  //设置布局管理器  LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);  linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);  recyclerview_horizontal1.setLayoutManager(linearLayoutManager);  //设置适配器  mAdapter1 = new GalleryAdapter(this, mDatas1);  recyclerview_horizontal1.setAdapter(mAdapter1);