如何在Android中将SwipeRefreshLayout和imageView使用到NestedScrollView中

Question

In my application i want use SwipeRefreshLayout and imageView into NestedScrollView

I write below codes, but when run application show me many la g when scroll RecyclerView and i'm not scroll items .

My xml code :

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:focusableInTouchMode="true"
            android:orientation="vertical">

            <include layout="@layout/banner_layout" />

            <android.support.v7.widget.RecyclerView
                android:id="@+id/list"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

        </LinearLayout>

    </android.support.v4.widget.NestedScrollView>

</android.support.v4.widget.SwipeRefreshLayout>

My java codes:

list.setLayoutManager(linearLayoutManager);
list.setHasFixedSize(true);
list.setNestedScrollingEnabled(false);
list.setAdapter(todayRecyclerAdapter);

How can i fix it and use this views?

Answer 1

Avoid nested scrolling whenever possible . You can design layout like this:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

            <android.support.v7.widget.RecyclerView
                android:id="@+id/list"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>

You can define data of adapter like this

.............
List<Object> objects=new ArrayList<>()
object.add(new ImageData('Image url'))
object.add(new Data('title','subtitle','date'))
.............

Since RecylerView adapter supports different viewType s you can use first position of adapter as header view type and rest normal view type.
For that you can refer to this ans Is there an addHeaderView equivalent for RecyclerView?
For a dynamic header, you can create a method like :

----
setHeaderAvailable(boolean isHeaderAvailable){
  this.isHeaderAvailable=isHeaderAvailable
}
----

and adapter data will look like this:

---
  List<Object> objects=new ArrayList<>()
  if(imageUrl!=null){
  adapter.setHeaderAvailable(true)
  object.add(new ImageData('Image url'))
}else{
  adapter.setHeaderAvailable(false)
}
   object.add(new Data('title','subtitle','date'))
--

and update getItemViewType method like this:

----
@Override
public int getItemViewType(int position) {
     if (isPositionHeader(position) && isHeaderAvailable)
            return TYPE_HEADER;

        return TYPE_ITEM;
 }
---

Answer 2

replace your RecyclerView with this one..

<android.support.v7.widget.RecyclerView
            android:id="@+id/list"
            android:layout_width="match_parent"
            android:layout_height="200dp" />

Answer 3

您已经在setAdapter之前设置了此属性

recyclerView.setNestedScrollingEnabled(false);

Answer 4

   <CoordinatorLayout>
   <SwipeRefreshLayout>
       <RecyclerView>  

            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

       <Appbarlayout>

              <Toolbar>

               app:layout_scrollFlags="scroll|snap"/>

       <Relative Layout>

             app:layout_scrollFlags="scroll|snap"/>

           <ImageView>

              </Relative Layout>

      </Appbarlayout>
       </SwipeRefreshLayout> 
         </CoordinatorLayout>

         Please try in these way it will work.