viewPage+recycleview 横向翻页无限循环代码
时间: 2023-07-29 10:08:18 浏览: 82
以下是 Android 中结合 ViewPager 和 RecyclerView 实现横向翻页无限循环的代码示例:
1. 在布局文件中定义 ViewPager 和 RecyclerView:
```xml
<androidx.viewpager.widget.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="200dp" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
```
2. 在 Activity 或 Fragment 中初始化 ViewPager 和 RecyclerView:
```java
private ViewPager mViewPager;
private MyPagerAdapter mPagerAdapter;
private RecyclerView mRecyclerView;
private LinearLayoutManager mLinearLayoutManager;
private List<MyData> mDataList;
private MyAdapter mAdapter;
private int mCurrentPosition = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mViewPager = findViewById(R.id.view_pager);
mRecyclerView = findViewById(R.id.recycler_view);
// 设置 ViewPager 适配器
mPagerAdapter = new MyPagerAdapter(this);
mViewPager.setAdapter(mPagerAdapter);
// 初始化数据
mDataList = new ArrayList<>();
for (int i = 0; i < 20; i++) {
mDataList.add(new MyData("Item " + i));
}
// 初始化适配器
mAdapter = new MyAdapter(this, mDataList);
// 初始化布局管理器
mLinearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
mRecyclerView.setLayoutManager(mLinearLayoutManager);
// 设置适配器
mRecyclerView.setAdapter(mAdapter);
// 监听 RecyclerView 滚动事件
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
// 计算当前显示在 ViewPager 中的位置
int position = mLinearLayoutManager.findFirstCompletelyVisibleItemPosition();
if (position != RecyclerView.NO_POSITION && position != mCurrentPosition) {
mCurrentPosition = position;
mViewPager.setCurrentItem(mCurrentPosition, false);
}
}
});
// 监听 ViewPager 页面切换事件
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
// 设置 RecyclerView 滚动到对应位置
mRecyclerView.smoothScrollToPosition(position);
mCurrentPosition = position;
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
// 初始化第一个页面
mViewPager.setCurrentItem(mCurrentPosition);
mRecyclerView.scrollToPosition(mCurrentPosition);
}
```
3. 编写 ViewPager 和 RecyclerView 的适配器和数据类:
```java
public class MyPagerAdapter extends PagerAdapter {
private Context mContext;
public MyPagerAdapter(Context context) {
mContext = context;
}
@Override
public int getCount() {
return 20;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
View view = LayoutInflater.from(mContext).inflate(R.layout.item_my_pager, container, false);
TextView textView = view.findViewById(R.id.tv_text);
textView.setText("Page " + position);
container.addView(view);
return view;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
}
public class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
private Context mContext;
private List<MyData> mDataList;
public MyAdapter(Context context, List<MyData> dataList) {
mContext = context;
mDataList = dataList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.item_my_data, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
MyData data = mDataList.get(position);
holder.mTextView.setText(data.getText());
}
@Override
public int getItemCount() {
return mDataList.size();
}
}
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView;
public MyViewHolder(View itemView) {
super(itemView);
mTextView = itemView.findViewById(R.id.tv_text);
}
}
public class MyData {
private String mText;
public MyData(String text) {
mText = text;
}
public String getText() {
return mText;
}
}
```
在这个示例中,当用户滑动 RecyclerView 时,会自动滑动到对应的 ViewPager 页面,当用户滑动 ViewPager 页面时,会自动滑动到对应的 RecyclerView 列表项,实现了横向翻页无限循环的效果。