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這篇文章主要為大家展示了“RecyclerView+PagerSnapHelper如何實(shí)現(xiàn)抖音首頁(yè)翻頁(yè)Viewpager效果”,內(nèi)容簡(jiǎn)而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“RecyclerView+PagerSnapHelper如何實(shí)現(xiàn)抖音首頁(yè)翻頁(yè)Viewpager效果”這篇文章吧。
RecyclerView + PagerSnapHelper 實(shí)現(xiàn)抖音首頁(yè)翻頁(yè)的Viewpager效果,供大家參考,具體內(nèi)容如下
先來(lái)個(gè)效果
實(shí)現(xiàn)方式
PagerSnapHelperActivity.java
public class PagerSnapHelperActivity extends Activity { /** * UI */ // recycleView private RecyclerView mRecyclerView = null; // adapter private PagerSnapHelperAdapter mMyadapter = null; /** * 數(shù)據(jù) */ //data private ArrayList<String> mDataList = new ArrayList<String>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.recycle_pager_activity); // -----------創(chuàng)建數(shù)據(jù)集------------- for (int i = 1; i < 100; i++) { mDataList.add("item" + i); } // 縱向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 之后執(zhí)行 @Override public int findTargetSnapPosition(RecyclerView.LayoutManager layoutManager, int velocityX, int velocityY) { // TODO 找到對(duì)應(yīng)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 之后執(zhí)行 @Nullable @Override public View findSnapView(RecyclerView.LayoutManager layoutManager) { // TODO 找到對(duì)應(yīng)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); // 默認(rèn)是Vertical (HORIZONTAL則為橫向列表) linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL); // mRecyclerView.setLayoutManager(linearLayoutManager); // TODO 這么寫是為了獲取RecycleView的寬高 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); } /** * 這么寫是為了獲取RecycleView的寬高 */ // 創(chuàng)建Adapter,并指定數(shù)據(jù)集 mMyadapter = new PagerSnapHelperAdapter(mDataList, mRecyclerView.getWidth(), mRecyclerView.getHeight()); // 設(shè)置Adapter mRecyclerView.setAdapter(mMyadapter); } }); } }
recycle_pager_activity.xml
<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
public class PagerSnapHelperAdapter extends RecyclerView.Adapter<PagerSnapHelperAdapter.ViewHolder> { // 數(shù)據(jù)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---"); // 創(chuàng)建一個(gè)View,簡(jiǎn)單起見直接使用系統(tǒng)提供的布局,就是一個(gè)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); // 創(chuàng)建一個(gè)ViewHolder ViewHolder holder = new ViewHolder(view); return holder; } @Override public void onBindViewHolder(ViewHolder viewHolder, int position) { Log.e("xiaxl: ", "---onBindViewHolder---"); // 綁定數(shù)據(jù)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
<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>
以上是“RecyclerView+PagerSnapHelper如何實(shí)現(xiàn)抖音首頁(yè)翻頁(yè)Viewpager效果”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對(duì)大家有所幫助,如果還想學(xué)習(xí)更多知識(shí),歡迎關(guān)注億速云行業(yè)資訊頻道!
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