Android 中使用RecyclerView实现底部翻页

RecyclerView 是Android L版本中新添加的一个用来取代ListView的SDK，它的灵活性与可替代性比listview更好。接下来通过一系列的文章讲解如何使用RecyclerView,彻底抛弃ListView.

最近在做pad端的app，需要一个像网页一样效果，之前使用addView方式，页码少的时候还可以，能实现效果，但是碰到了一个1000多页的界面，就GG了，页码半天显示不出来，于是使用RecyclerView作为容器，主要是看中RecyclerView的复用，不说了，看代码：

BottomPagerView xml布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:orientation="horizontal">
 <LinearLayout
 android:id="@+id/bottom_ll_content"
 android:layout_gravity="center_vertical"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:gravity="center_vertical"
 android:layout_marginLeft="10px"
 android:layout_marginRight="10px"
 android:layout_marginTop="10px"
 android:orientation="horizontal">
 <Button
  android:id="@+id/pre_page"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginRight="@dimen/y5"
  android:paddingBottom="@dimen/x4"
  android:paddingLeft="@dimen/y5"
  android:paddingRight="@dimen/y5"
  android:paddingTop="@dimen/x4"
  android:text="上一页"
  android:textSize="@dimen/middlesize"/>
 <android.support.v7.widget.RecyclerView
  android:id="@+id/recycler"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"/>
 <Button
  android:id="@+id/next_page"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginLeft="@dimen/y5"
  android:paddingBottom="@dimen/x4"
  android:paddingLeft="@dimen/y5"
  android:paddingRight="@dimen/y5"
  android:paddingTop="@dimen/x4"
  android:text="下一页"
  android:textSize="@dimen/middlesize"/>
 </LinearLayout>
</LinearLayout>

adapter的xml布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">
 <RadioButton
 android:id="@+id/bottom_item_rb"
 android:layout_width="wrap_content"
 android:text="1"
 android:gravity="center_vertical"
 android:background="@drawable/tab_select"
 android:layout_height="wrap_content"/>
</LinearLayout>
BottomPagerView 代码：
public class BottomPagerView extends LinearLayout {
 private final LinearLayout ll_content;
 private int pageSize = 0;
 private Button pre_page;
 private Button next_page;
 private RecyclerView recycler;
 private BottomAdapter mBottomAdapter;
 Context mContent;
 private boolean mShouldScroll = false;
 private int mToPosition = 0;
 private int smoothWidth = 0;
 public BottomPagerView(Context context) {
 this(context, null);
 }
 public BottomPagerView(Context context, @Nullable AttributeSet attrs) {
 super(context, attrs);
 this.mContent = context;
 LayoutInflater.from(context).inflate(R.layout.bottom_page, this, true);
 ll_content = (LinearLayout) findViewById(R.id.bottom_ll_content);
 pre_page = (Button) findViewById(R.id.pre_page);
 next_page = (Button) findViewById(R.id.next_page);
 recycler = (RecyclerView) findViewById(R.id.recycler);
 /*initView(context);*/
 }
 public BottomPagerView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
 this(context, attrs);
 }
 private int currentPage = 0;
 public void initView(final Context context) {
 if (pageSize == 0) {
  ll_content.setVisibility(INVISIBLE);
 } else {
  ll_content.setVisibility(VISIBLE);
  final List<BottomBean> list = new ArrayList<>();
  for (int i = 0; i < pageSize; i++) {
  BottomBean bean = new BottomBean();
  bean.setPosition(i);
  if (i == 0) {
   bean.setSelect(true);
  } else {
   bean.setSelect(false);
  }
  list.add(bean);
  }
  final LinearLayoutManager manager = new LinearLayoutManager(context);
  manager.setOrientation(LinearLayoutManager.HORIZONTAL);
  recycler.setLayoutManager(manager);
  int width = 0;
  if (pageSize > 8) {
  int pixelSize = getResources().getDimensionPixelSize(R.dimen.y6);
  width = pixelSize * 10;
  } else {
  width = LayoutParams.WRAP_CONTENT;
  }
  LayoutParams params = new LayoutParams(width, ViewGroup.LayoutParams.WRAP_CONTENT);
  recycler.setLayoutParams(params);
  mBottomAdapter = new BottomAdapter(context, list);
  recycler.setAdapter(mBottomAdapter);
  mBottomAdapter.setCurPage(new BottomAdapter.getCurPage() {
  @Override
  public void serCurPage(int p) {
   list.get(currentPage).setSelect(false);
   list.get(p).setSelect(true);
   mBottomAdapter.notifyDataSetChanged();
   currentPage = p;
   smoothMoveToPosition(recycler, p);
   recycler.addOnScrollListener(new RecyclerView.OnScrollListener() {
   @Override
   public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
    super.onScrollStateChanged(recyclerView, newState);
    if (mShouldScroll){
    mShouldScroll = false;
    smoothMoveToPosition(recycler,mToPosition);
    }
   }
   });
   if (Curpage != null) {
   Curpage.serCurPage(p);
   }
  }
  });
  pre_page.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
   if (currentPage > 0) {
   int page = currentPage - 1;
   list.get(currentPage).setSelect(false);
   list.get(page).setSelect(true);
   currentPage = page;
   mBottomAdapter.notifyDataSetChanged();
   smoothMoveToPosition(recycler, page);
   recycler.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
    super.onScrollStateChanged(recyclerView, newState);
    if (mShouldScroll){
     mShouldScroll = false;
     smoothMoveToPosition(recycler,mToPosition);
    }
    }
   });
   if (Curpage != null) {
    Curpage.serCurPage(page);
   }
   } else {
   return;
   }
  }
  });
  next_page.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
   if (currentPage < pageSize - 1) {
   list.get(currentPage).setSelect(false);
   int page = currentPage + 1;
   Log.d("BottomPagerView", "onClick: " + page);
   list.get(page).setSelect(true);
   currentPage = page;
   mBottomAdapter.notifyDataSetChanged();
   smoothMoveToPosition(recycler, page);
   recycler.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
    super.onScrollStateChanged(recyclerView, newState);
    if (mShouldScroll){
     mShouldScroll = false;
     smoothMoveToPosition(recycler,mToPosition);
    }
    }
   });
   if (Curpage != null) {
    Curpage.serCurPage(page);
   }
   } else {
   return;
   }
  }
  });
 }
 }
 public void setPageSize(int size) {
 this.pageSize = size;
 initView(mContent);
 }
 private getCurPage Curpage;
 public interface getCurPage {
 void serCurPage(int p);
 }
 public void setCurPage(getCurPage page) {
 this.Curpage = page;
 }
 private void smoothMoveToPosition(RecyclerView mRecyclerView, final int position) {
 int firstItem = mRecyclerView.getChildLayoutPosition(mRecyclerView.getChildAt(0));
 int lastItem = mRecyclerView.getChildLayoutPosition(mRecyclerView.getChildAt(mRecyclerView.getChildCount()-1 ));
 Log.d("BottomPagerView", "smoothMoveToPosition: firstItem"+firstItem+" lastItem "+lastItem+" position"+position);
 if (position < firstItem) {
  mRecyclerView.smoothScrollToPosition(position);
  mShouldScroll = true;
  mToPosition = position;
 } else if (position <= lastItem) {
// 跳转位置在第一个可见项之后，最后一个可见项之前
// smoothScrollToPosition根本不会动，此时调用smoothScrollBy来滑动到指定位置
  int movePosition = position - firstItem;
  if (movePosition >= 0 && movePosition <= mRecyclerView.getChildCount()) {
  int top = mRecyclerView.getChildAt(movePosition).getLeft();
  int width = mRecyclerView.getMeasuredWidth() / 2;
  int scroll = top - width+mRecyclerView.getChildAt(movePosition).getMeasuredWidth()/2;
  Log.d("BottomPagerView", "smoothMove: "+scroll);
  mRecyclerView.smoothScrollBy(scroll, 0);
  }
 } else {
  mRecyclerView.smoothScrollToPosition(position);
  mShouldScroll = true;
  mToPosition = position;
 }
 }
}
BottomAdapter adapter：
public class BottomAdapter extends RecyclerView.Adapter<BottomAdapter.MyViewHolder> {
 Context mContext;
 List<BottomBean> size;
 private boolean isFirst = true;
 private int currentPage = 0;
 public BottomAdapter(Context context, List<BottomBean> size) {
 this.mContext = context;
 this.size = size;
 }
 @Override
 public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
 View view = View.inflate(mContext, R.layout.bottom_item, null);
 return new MyViewHolder(view);
 }
 @Override
 public void onBindViewHolder(final MyViewHolder holder, final int position) {
 holder.rb.setButtonDrawable(null);
 holder.rb.setText(position + 1 + "");
 holder.rb.setTag(position);
 holder.rb.setChecked(size.get(position).isSelect());
 holder.rb.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  if (!size.get((int) holder.rb.getTag()).isSelect()){
   Curpage.serCurPage((int) holder.rb.getTag());
  }
  }
 });
 }
 @Override
 public int getItemCount() {
 return size.size();
 }
 class MyViewHolder extends RecyclerView.ViewHolder {
 private final RadioButton rb;
 public MyViewHolder(View itemView) {
  super(itemView);
  rb = (RadioButton) itemView.findViewById(R.id.bottom_item_rb);
 }
 }
 private getCurPage Curpage;
 public interface getCurPage {
 void serCurPage(int p);
 }
 public void setCurPage(getCurPage page) {
 this.Curpage = page;
 }
}

调用：

直接在xml中使用

<BottomPagerView
 android:id="@+id/part_part_tab"
 android:layout_width="wrap_content"
 android:layout_below="@+id/part_part_recycler"
 android:layout_height="wrap_content"
 android:layout_gravity="center_horizontal"
 android:layout_marginBottom="5dp"/>

代码中调用：

初始化：

mBottomPagerView.setPageSize(AllPage);

回调：

mBottomPagerView.setCurPage(new BottomPagerView.getCurPage() {
 @Override public void serCurPage(int p) { //获取点击的页码数，操作
 }
});

总结

以上所述是小编给大家介绍的Android 中使用RecyclerView实现底部翻页，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！