I have searched a lot regarding my query and none of them was useful. I have a recyclerview and some static data inside a scroll view which is inside a root parentlayout as show below.
I have set -
scrollview.scrollto(0,0);
because everytime i open the activity it jumps to the recyclerview firstitem and it skips out the static data above the recyclerview.
recyclerview.setNestedScrollingEnabled(false);
recyclerview.setfocusable(false);
for smoothscroll.
the problem is with-
layoutmanager.scrollToPositionWithOffset(pos,0);
it is not working. I have set the aboveline after setting adapter to recyclerview. Also tried with NestedScrollView but in vain.
although I have used
layoutmanager.scrollToPosition(pos);
For those who skip the code, i have set match_parent to ScrollView and fillviewport to true.
Here is my layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/bottomsheet"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.inkdrops.khaalijeb.BrandCouponActivity">
<RelativeLayout
android:id="@+id/inclusionviewgroup"
android:layout_width="match_parent"
android:layout_height="match_parent">
<static data/>
<ScrollView
android:id="@+id/scrollviewmain"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/one"
android:fillViewport="true"
android:scrollbars="none"
android:layout_above="@+id/donelayout">
<staticdata/>
<TextView
android:id="@+id/dealstext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/card1"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:textSize="16sp"
android:text="Deals & Coupons"
android:textColor="#444444" />
<RelativeLayout
android:id="@+id/recyclerlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/dealstext"
android:layout_marginTop="5dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:background="@color/colorbackground">
<android.support.v7.widget.RecyclerView
android:id="@+id/coupon_rec_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorbackground"
android:visibility="visible"/>
</RelativeLayout>
<statisdata>
</RelativeLayout>
</ScrollView>
include layout="@layout/activity_coupons"
android:visibility="gone"
/>
</RelativeLayout>
</RelativeLayout>
Need to scroll ScrollView
by getting top position of RecyclerView
's child :
float y = recyclerView.getY() + recyclerView.getChildAt(selectedPosition).getY();
scrollView.smoothScrollTo(0, (int) y);
you can use scroll view method to reach your desired locations as:
scrollView.smoothScrollTo(int x, int y);
I know I'm answering pretty late but if you get an auto scroll issue, you need to add android:descendantFocusability="blocksDescendants" in your RelativeLayout. So, your RealtiveLyout tag will look like this:
<RelativeLayout
android:id="@+id/inclusionviewgroup"
android:layout_width="match_parent"
android:descendantFocusability="blocksDescendants"
android:layout_height="match_parent">
Step 1: Add this line for selecting that position in the recyclerview
adaptercat.setSelectedItem(Integer.parseInt(dealtypeid));
Step 2: Once check below constructor by getting current position
public CatgerotyAdapter(Context context, ArrayList<HashMap<String, String>> arraylist,String selectedPosition) {
this.context = context;
this.data = arraylist;
resultp = new HashMap<>();
currentItemPos=Integer.parseInt(selectedPosition)-1;
}
Step 3: And this function also in adapter
public void setCurrentItem(int item)
{
this.currentItemPos = item;
}
Last step 4. Add this function outside adapter in your class
private void onPagerItemClick2(Integer tag)
{
adaptercat.setCurrentItem(tag);
catsp.setAdapter(adaptercat);
}
Pust this line in your listview item click listner
((ClassName) context).onPagerItemClick2(position);
That position will be selected when will you open listview ..
Use this method scrollToPosition (int position) this is work for me. hope this will help you.
mMessagesRecyclerView = (RecyclerView) findViewById(R.id.messagesRecyclerView);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setStackFromEnd(true);
mMessagesRecyclerView.setLayoutManager(layoutManager);
mMessagesAdapter = new MessagesAdapter();
mMessagesRecyclerView.setAdapter(mMessagesAdapter);
mMessagesRecyclerView.scrollToPosition(your position);
this is my layoutstructer
来源:https://stackoverflow.com/questions/40774472/how-to-scroll-to-a-particular-position-in-recyclerview-inside-scrollview