Android仿制淘宝滚动图文条的示例代码

public class AdModel {

  public String title;
  public String content;

  public AdModel(String title, String content) {
    this.title = title;
    this.cOntent= content;
  }
}

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>


  

    

    

  

  

  

public class AdAdapter extends RecyclerView.Adapter {

  private Context mContext;
  private OnItemClickListener onItemClickListener;
  private LayoutInflater mInflater;
  private List mDataList;

  public AdAdapter(Context context, List datas) {
    this.mCOntext= context;
    mDataList = datas;
    mInflater = LayoutInflater.from(context);
  }

  @Override
  public ViewHolder onCreateViewHolder(final ViewGroup parent, int viewType) {
    View itemView = mInflater.inflate(R.layout.item_ad, null);
    return new ViewHolder(itemView);
  }

  @Override
  public void onBindViewHolder(ViewHolder holder, final int p) {
    if (mDataList == null || mDataList.size() ==0){
      return;
    }
    if (holder != null) {
      final int position = p % mDataList.size();

      holder.mTvTitle.setText(mDataList.get(position).title);
      holder.mTvContent.setText(mDataList.get(position).content);
      holder.mIvIcon.setImageResource(R.drawable.icon);

      holder.viewRoot.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          if (onItemClickListener != null) {
            onItemClickListener.onItemClick(v, position);
          }
        }
      });
    }
  }

  public void setOnItemClickListener(OnItemClickListener clickListener) {
    this.OnItemClickListener= clickListener;
  }

  @Override
  public int getItemCount() {
    return mDataList == null &＃63; 0 : Integer.MAX_VALUE;
  }

  public class ViewHolder extends RecyclerView.ViewHolder {

    public View viewRoot;
    public TextView mTvTitle;
    public TextView mTvContent;
    public ImageView mIvIcon;

    public ViewHolder(View itemView) {
      super(itemView);
      viewRoot = itemView.findViewById(R.id.layout);
      mTvTitle = itemView.findViewById(R.id.tv_title);
      mTvCOntent= itemView.findViewById(R.id.tv_content);
      mIvIcon = itemView.findViewById(R.id.iv_icon);
    }
  }

  /**
   * RecyclerView的item点击监听接口
   */
  public interface OnItemClickListener {
    void onItemClick(View v, int position);
  }

}

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>


  

package com.cc.scrolladbar;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.LinearSmoothScroller;
import android.support.v7.widget.RecyclerView;
import android.util.DisplayMetrics;
import android.view.View;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by guoshichao on 2018/8/16
 * QQ:1169380200
 */

public class MainActivity extends AppCompatActivity {

  private static final int SCROLL_AD = 0;//会员轮播广告
  public static final int DEFAULT_SCROLL_INTERVAL = 3000;//会员轮播广告间隔时间
  public static final int DEFAULT_SCROLL_ANIMATION_TIME = 500;//会员轮播广告动画时长

  private RecyclerView mRvAd;
  private AdAdapter mAdapter;
  private List mAdList;
  private AdHandler mHandler;
  private int nowScrollPosition = 0;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    initList();
  }

  @Override
  public void onStart() {
    super.onStart();
    scrollVipAdOnce(nowScrollPosition);//防止滑动一半切到别的页面使滑动完成
    if (mHandler != null) {
      sendScrollMessage(DEFAULT_SCROLL_INTERVAL);
    }
  }

  @Override
  public void onStop() {
    super.onStop();
    if (mHandler != null) {
      mHandler.removeMessages(SCROLL_AD);
    }
  }

  private void initList() {
    mAdList = new ArrayList<>();
    mAdList.add(new AdModel("第一条广告标题", "我是第一条广告的内容哦~"));
    mAdList.add(new AdModel("第二条广告标题", "我是第二条广告的内容哦~"));
    mAdList.add(new AdModel("第三条广告标题", "我是第三条广告的内容哦~"));

    LinearLayoutManager manager = new LinearLayoutManager(this) {
      @Override
      public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
        LinearSmoothScroller smoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {
          // 为了平滑滑动返回：滑过1px时经历的时间(ms)。
          @Override
          protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
            return (float) (DEFAULT_SCROLL_ANIMATION_TIME / displayMetrics.densityDpi);
          }
        };
        smoothScroller.setTargetPosition(position);
        startSmoothScroll(smoothScroller);
      }
    };

    mRvAd = (RecyclerView) findViewById(R.id.rv_ad);
    mRvAd.setLayoutManager(manager);
    mAdapter = new AdAdapter(this, mAdList);
    mRvAd.setAdapter(mAdapter);
    mAdapter.setOnItemClickListener(new AdAdapter.OnItemClickListener() {
      @Override
      public void onItemClick(View v, int position) {
        //点击跳转到指定广告页
      }
    });
    mHandler = new AdHandler();
    sendScrollMessage(DEFAULT_SCROLL_INTERVAL);
  }

  private void scrollVipAdOnce(int position) {
    if (mAdList != null && mAdList.size() > 1) {
      //平滑滑动到指定位置
      mRvAd.smoothScrollToPosition(position);
    }
  }

  private void sendScrollMessage(long delayMillis) {
    mHandler.removeMessages(SCROLL_AD);
    mHandler.sendEmptyMessageDelayed(SCROLL_AD, delayMillis);
  }

  private class AdHandler extends Handler {

    @Override
    public void handleMessage(Message msg) {
      super.handleMessage(msg);

      switch (msg.what) {
        case SCROLL_AD:
          nowScrollPosition++;
          scrollVipAdOnce(nowScrollPosition);
          sendScrollMessage(DEFAULT_SCROLL_INTERVAL);
          break;
        default:
          break;
      }
    }
  }

}

LinearLayoutManager manager = new LinearLayoutManager(this) {
      @Override
      public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
        LinearSmoothScroller smoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {
          // 为了平滑滑动返回：滑过1px时经历的时间(ms)。
          @Override
          protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
            return (float) (DEFAULT_SCROLL_ANIMATION_TIME / displayMetrics.densityDpi);
          }
        };
        smoothScroller.setTargetPosition(position);
        startSmoothScroll(smoothScroller);
      }
    };