RecyclerView+PagerSnapHelper实现抖音首页翻页的Viewpager效果

RecyclerView + PagerSnapHelper 实现抖音首页翻页的Viewpager效果，供大家参考，具体内容如下

先来个效果

实现方式

PagerSnapHelperActivity.java

public class PagerSnapHelperActivity extends Activity {

 
 // recycleView
 private RecyclerView mRecyclerView = null;
 // adapter
 private PagerSnapHelperAdapter mMyadapter = null;
 
 //data
 private ArrayList mDataList = new ArrayList();

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

 // -----------创建数据集-------------
 for (int i = 1; i < 100; i++) {
  mDataList.add("item" + i);
 }
 // 纵向List
 initUI();

 }

 public void initUI() {
 // ---RecyclerView---
 mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview_vertical);
 mRecyclerView.setNestedScrollingEnabled(false);
 // PagerSnapHelper
 PagerSnapHelper snapHelper = new PagerSnapHelper() {
  // 在 Adapter的 onBindViewHolder 之后执行
  @Override
  public int findTargetSnapPosition(RecyclerView.LayoutManager layoutManager, int velocityX, int velocityY) {
  // TODO 找到对应的Index
  Log.e("xiaxl: ", "---findTargetSnapPosition---");
  int targetPos = super.findTargetSnapPosition(layoutManager, velocityX, velocityY);
  Log.e("xiaxl: ", "targetPos: " + targetPos);

  Toast.makeText(PagerSnapHelperActivity.this, "滑到到 " + targetPos + "位置", Toast.LENGTH_SHORT).show();

  return targetPos;
  }

  // 在 Adapter的 onBindViewHolder 之后执行
  @Nullable
  @Override
  public View findSnapView(RecyclerView.LayoutManager layoutManager) {
  // TODO 找到对应的View
  Log.e("xiaxl: ", "---findSnapView---");
  View view = super.findSnapView(layoutManager);
  Log.e("xiaxl: ", "tag: " + view.getTag());

  return view;
  }
 };
 snapHelper.attachToRecyclerView(mRecyclerView);
 // ---布局管理器---
 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
 // 默认是Vertical (HORIZONTAL则为横向列表)
 linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
 //
 mRecyclerView.setLayoutManager(linearLayoutManager);

 // TODO 这么写是为了获取RecycleView的宽高
 mRecyclerView.getViewTreeObserver().addonGlobalLayoutListener(new ViewTreeObserver.onGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
  if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
   mRecyclerView.getViewTreeObserver().removeGlobalonLayoutListener(this);
  } else {
   mRecyclerView.getViewTreeObserver().removeonGlobalLayoutListener(this);
  }

  
  // 创建Adapter，并指定数据集
  mMyadapter = new PagerSnapHelperAdapter(mDataList, mRecyclerView.getWidth(), mRecyclerView.getHeight());
  // 设置Adapter
  mRecyclerView.setAdapter(mMyadapter);
  }
 });
 }
}

recycle_pager_activity.xml

PagerSnapHelperAdapter.java

public class PagerSnapHelperAdapter extends RecyclerView.Adapter {

 // 数据集
 private ArrayList mDataList;


 private int mWidth;
 private int mHeight;

 //
 public PagerSnapHelperAdapter(ArrayList dataset, int width, int height) {
 super();
 this.mDataList = dataset;
 //
 mWidth = width;
 mHeight = height;
 }

 @Override
 public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
 Log.e("xiaxl: ", "---onCreateViewHolder---");
 // 创建一个View，简单起见直接使用系统提供的布局，就是一个TextView
 View view = View.inflate(viewGroup.getContext(), R.layout.recycle_pager_item, null);


 View contentView = view.findViewById(R.id.add_btn);
 RelativeLayout.LayoutParams rl = (RelativeLayout.LayoutParams) contentView.getLayoutParams();
 rl.width = mWidth;
 rl.height = mHeight;
 contentView.setLayoutParams(rl);


 // 创建一个ViewHolder
 ViewHolder holder = new ViewHolder(view);
 return holder;
 }

 @Override
 public void onBindViewHolder(ViewHolder viewHolder, int position) {
 Log.e("xiaxl: ", "---onBindViewHolder---");

 // 绑定数据到ViewHolder上
 viewHolder.itemView.setTag(position);
 //
 viewHolder.mTextView.setText(position + " item");
 }

 @Override
 public int getItemCount() {
 return mDataList.size();
 }

 
 public static class ViewHolder extends RecyclerView.ViewHolder {

 public TextView mTextView;

 public ViewHolder(View itemView) {
  super(itemView);
  mTextView = (TextView) itemView.findViewById(R.id.add_btn);
 }
 }
}

recycle_pager_item.xml

源码下载：抖音首页翻页效果

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