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
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public class PagerSnapHelperActivity extends Activity { /** * UI */ // recycleView private RecyclerView mRecyclerView = null; // adapter private PagerSnapHelperAdapter mMyadapter = null; /** * 数据 */ //data private ArrayList<String> mDataList = new ArrayList<String>(); @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); } /** * 这么写是为了获取RecycleView的宽高 */ // 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
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview_vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:scrollbars="vertical" /></RelativeLayout> |
PagerSnapHelperAdapter.java
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public class PagerSnapHelperAdapter extends RecyclerView.Adapter<PagerSnapHelperAdapter.ViewHolder> { // 数据集 private ArrayList<String> mDataList; private int mWidth; private int mHeight; // public PagerSnapHelperAdapter(ArrayList<String> 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
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="640dp" android:orientation="vertical"> <TextView android:id="@+id/add_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#ff0000" android:gravity="center" android:text="添加Item" android:textSize="36dp" /></RelativeLayout> |
源码下载：抖音首页翻页效果
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/xiaxl/article/details/80984464
