Android RecyclerView-如何在嵌套的scrollview中的某个位置平滑滚动到项目顶部?
我实现了Recycler视图,当单击recyclerview时,它将转到下一个活动,但当我回来时,我应该返回与单击的位置相同的位置,就像我需要根据项目的位置滚动到特定位置一样,我有位置,但由于嵌套的滚动视图,我无法滚动 如何解决此问题Android RecyclerView-如何在嵌套的scrollview中的某个位置平滑滚动到项目顶部?,android,android-recyclerview,android-nestedscrollview,nestedscrollview,Android,Android Recyclerview,Android Nestedscrollview,Nestedscrollview,我实现了Recycler视图,当单击recyclerview时,它将转到下一个活动,但当我回来时,我应该返回与单击的位置相同的位置,就像我需要根据项目的位置滚动到特定位置一样,我有位置,但由于嵌套的滚动视图,我无法滚动 如何解决此问题 <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http:/
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="140dp"
android:background="@android:color/transparent"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/theme_color"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
app:title="@string/app_name"
app:titleEnabled="false">
<LinearLayout
android:id="@+id/ll_report_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="?attr/actionBarSize"
android:orientation="vertical">
......
</LinearLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/theme_color"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>
.....
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/palegray"
android:scrollbars="none"
android:id="@+id/nested_scroll"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/palegray"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@color/card_header" />
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
但不起作用,我也用了这个,但这个也对我起作用
RecyclerView.SmoothScroller smoothScroller = new LinearSmoothScroller(RoleActivity.this) {
@Override protected int getVerticalSnapPreference() {
return LinearSmoothScroller.SNAP_TO_START;
}
};
smoothScroller.setTargetPosition(i);
mLayoutManager.startSmoothScroll(smoothScroller);
mPosition是要滚动的特定位置。将此保存在onSaveInstanceState中
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(SELECTED_KEY, mPosition);
}
立即创建
if(savedInstanceState != null && savedInstanceState.containsKey(SELECTED_KEY))
{
mPosition = savedInstanceState.getInt(SELECTED_KEY);
}
一旦要传递给reccylerview的数据准备就绪,即在adapter.notifyDataSetChanged()之后,调用mRecylerView.smoothScrollToPosition(mPosition)
mPosition是要滚动的特定位置。将此保存在onSaveInstanceState中
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(SELECTED_KEY, mPosition);
}
立即创建
if(savedInstanceState != null && savedInstanceState.containsKey(SELECTED_KEY))
{
mPosition = savedInstanceState.getInt(SELECTED_KEY);
}
一旦要传递给reccylerview的数据准备就绪,即在adapter.notifyDataSetChanged()之后,调用
mRecylerView.smoothScrollToPosition(mPosition)
一点也不工作,我需要为嵌套的Scrollview中的recyclerview进行分类;(根本不工作,我需要为嵌套Scrollview中的recyclerview进行分类(