我不能在RecyclerView中禁用滚动。我尝试调用rv.setEnabled(false),但我仍然可以滚动。
我如何禁用滚动?
我不能在RecyclerView中禁用滚动。我尝试调用rv.setEnabled(false),但我仍然可以滚动。
我如何禁用滚动?
当前回答
API 21及以上版本:
不需要java代码。 你可以设置android:nestedScrollingEnabled="false" 在xml:
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="true"
android:nestedScrollingEnabled="false"
tools:listitem="@layout/adapter_favorite_place">
其他回答
有一种使用标准功能禁用滚动的更直接的方法(从技术上讲,它更确切地说是拦截滚动事件,并在满足条件时结束它)。RecyclerView有一个方法叫做addOnScrollListener(OnScrollListener监听器),使用这个你可以停止滚动,就像这样:
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (viewModel.isItemSelected) {
recyclerView.stopScroll();
}
}
});
Use case: Let's say that you want to disable scrolling when you click on one of the items within RecyclerView so you could perform some actions with it, without being distracted by accidentally scrolling to another item, and when you are done with it, just click on the item again to enable scrolling. For that, you would want to attach OnClickListener to every item within RecyclerView, so when you click on an item, it would toggle isItemSelected from false to true. This way when you try to scroll, RecyclerView will automatically call method onScrollStateChanged and since isItemSelected set to true, it will stop immediately, before RecyclerView got the chance, well... to scroll.
注意:为了更好的可用性,尝试使用GestureListener而不是OnClickListener来防止意外点击。
这对我来说很管用:
recyclerView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return true;
}
});
你可以通过冻结RecyclerView来禁用滚动。
冻结: recyclerView.setLayoutFrozen(真正的)
解冻:recyclerView.setLayoutFrozen(false)
通过触摸停止滚动,但通过命令继续滚动:
如果(appTopBarMessagesRV == null) { appTopBarMessagesRV = findViewById(R.id.mainBarScrollMessagesRV);
appTopBarMessagesRV.addOnItemTouchListener(new RecyclerView.SimpleOnItemTouchListener() {
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
if ( rv.getScrollState() == RecyclerView.SCROLL_STATE_DRAGGING)
{
// Stop scrolling by touch
return false;
}
return true;
}
});
}
为此,您应该重写recycleView的layoutManager。这样它只会禁用滚动,没有其他功能。你仍然能够处理点击或任何其他触摸事件。例如:-
原:
public class CustomGridLayoutManager extends LinearLayoutManager {
private boolean isScrollEnabled = true;
public CustomGridLayoutManager(Context context) {
super(context);
}
public void setScrollEnabled(boolean flag) {
this.isScrollEnabled = flag;
}
@Override
public boolean canScrollVertically() {
//Similarly you can customize "canScrollHorizontally()" for managing horizontal scroll
return isScrollEnabled && super.canScrollVertically();
}
}
这里使用“isScrollEnabled”标志,你可以暂时启用/禁用循环视图的滚动功能。
另外:
简单覆盖现有的实现,以禁用滚动和允许单击。
linearLayoutManager = new LinearLayoutManager(context) {
@Override
public boolean canScrollVertically() {
return false;
}
};
在芬兰湾的科特林:
object : LinearLayoutManager(this) { override fun canScrollVertically() = false }