帮我写一段代码,当recyclerView超过一页时,显示滑动条ScrollView,滑动条为图片
时间: 2023-07-10 15:25:36 浏览: 109
好的,你可以尝试下面的代码:
1. 在你的布局文件中,添加一个 ScrollView 和一个 ImageView,用于作为滑动条:
```xml
<ScrollView
android:id="@+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- 添加你的 RecyclerView -->
</ScrollView>
<ImageView
android:id="@+id/scroll_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:background="@drawable/scroll_bar_image" />
```
2. 在你的 Activity 或 Fragment 中,添加以下代码:
```java
// 获取 RecyclerView 和 ScrollView 对象
RecyclerView recyclerView = findViewById(R.id.recycler_view);
ScrollView scrollView = findViewById(R.id.scroll_view);
ImageView scrollBar = findViewById(R.id.scroll_bar);
// 设置 RecyclerView 的滑动监听器
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
// 获取 RecyclerView 的高度和滚动距离
int recyclerViewHeight = recyclerView.getHeight();
int recyclerViewScrollY = recyclerView.computeVerticalScrollOffset();
// 获取 RecyclerView 的内容总高度
int recyclerViewContentHeight = recyclerView.computeVerticalScrollRange();
// 计算滚动条的高度和位置
int scrollBarHeight = recyclerViewHeight * recyclerViewHeight / recyclerViewContentHeight;
int scrollBarY = recyclerViewScrollY * (recyclerViewHeight - scrollBarHeight) / (recyclerViewContentHeight - recyclerViewHeight);
// 更新滚动条的位置和大小
scrollBar.setY(scrollBarY);
scrollBar.getLayoutParams().height = scrollBarHeight;
scrollBar.requestLayout();
// 根据 RecyclerView 的滚动位置,判断是否显示 ScrollView
if (recyclerViewContentHeight > recyclerViewHeight) {
scrollView.setVisibility(View.VISIBLE);
} else {
scrollView.setVisibility(View.GONE);
}
}
});
```
3. 替换上面代码中的 `@drawable/scroll_bar_image` 为你想要的滑动条图片资源。
希望这个代码对你有帮助!
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