如何将Recyclerview添加到Scrollview？

Question

I have an activity where there are a few Components and a recyclerview. I want the UI to be such that if I swipe up, I want the whole screen to scroll down; not just the recyclerview. How do I make this possible? I have tried by encapsulating all my layouts except the coordinator layout with a scrollview but it doesn't seem to be working.

Java code:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_single_art_call);

        Fund = (Button) findViewById(R.id.button2);
        /* -------- Obtain the Event ID of the item that the user has selected on the RecyclerView ------*/
        Intent intent = getIntent();
        Artcall_id  = intent.getStringExtra("Artcall_id");
        /* ----------------------------------------------------------------------------------------------*/

        mEventFundRef = FirebaseDatabase.getInstance().getReference().child("Fund");
        mRewardsRef = FirebaseDatabase.getInstance().getReference().child("Rewards").child(Artcall_id);
        rewards_list = (RecyclerView) findViewById(R.id.reward_list);


        rewards_list.setHasFixedSize(true);
        LinearLayoutManager layoutManager =  new LinearLayoutManager(this);
        rewards_list.setLayoutManager(layoutManager);
}

XML code:

 <?xml version="1.0" encoding="utf-8"?>
    <android.support.design.widget.CoordinatorLayout 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:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".FundingFlow.SingleArtCall">

   <ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <RelativeLayout
            android:id="@+id/relLayout1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <include
                android:id="@+id/genpage_toolbar"
                layout="@layout/app_bar_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
        </RelativeLayout>

        <TextView
            android:id="@+id/band_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_alignParentTop="true"
            android:layout_marginStart="24dp"
            android:layout_marginTop="186dp"
            android:text="Sean Roldan and Friends"
            android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title"
            android:textSize="24sp" />


        <!--Bottom Button -->
        <include layout="@layout/fund_button_layout" />

        <TextView
            android:id="@+id/band_location"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignStart="@+id/band_name"
            android:layout_below="@+id/band_name"
            android:text="Performing in Hyderabad, India." />

        <TextView
            android:id="@+id/started_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_alignStart="@+id/band_name"
            android:layout_marginTop="245dp"
            android:text="Started by Vishwesh Kirthi"
            android:textSize="14sp" />

        <TextView
            android:id="@+id/genre_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="259dp"
            android:text="Indian Folk and Blues"
            android:textAppearance="@style/TextAppearance.AppCompat.Button" />

        <ImageView
            android:id="@+id/videoView"
            android:layout_width="match_parent"
            android:layout_height="126dp"
            android:layout_alignParentStart="true"
            android:layout_below="@+id/relLayout1"
            android:src="@color/white" />

        <ProgressBar
            android:id="@+id/progressBar2"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="338dp"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="233dp"
            android:max="100"
            android:progress="60" />

        <TextView
            android:id="@+id/amt_fund_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignStart="@+id/band_name"
            android:layout_marginBottom="191dp"
            android:text="Rs. 7,80,000"
            android:textAppearance="@style/TextAppearance.AppCompat.Body1"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/target_fund_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignStart="@+id/band_name"
            android:layout_marginBottom="162dp"
            android:text="pledged of Rs. 13,00,000" />

        <TextView
            android:id="@+id/total_backers_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignStart="@+id/textView35"
            android:layout_alignTop="@+id/amt_fund_txt"
            android:text="120"
            android:textAppearance="@style/TextAppearance.AppCompat.Body1"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/textView35"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_alignTop="@+id/target_fund_txt"
            android:layout_marginEnd="124dp"
            android:text="backers" />

        <TextView
            android:id="@+id/time_left_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@+id/amt_fund_txt"
            android:layout_toEndOf="@+id/band_name"
            android:text="25"
            android:textAppearance="@style/TextAppearance.AppCompat.Body1"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/time_qt_left"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@+id/target_fund_txt"
            android:layout_toEndOf="@+id/band_name"
            android:text="days to go" />

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/time_qt_left"
            android:id="@+id/relLayout2">


            <android.support.v7.widget.RecyclerView
                android:id="@+id/reward_list"
                android:layout_width="354dp"
                android:layout_height="match_parent"
                android:layout_centerInParent="true"
                android:paddingTop="10dp"
                ></android.support.v7.widget.RecyclerView>

        </RelativeLayout>



    </RelativeLayout>


</ScrollView>

</android.support.design.widget.CoordinatorLayout>

Answer 1

You should avoid putting a recyclerview inside of a scrollview. When you do the recyclerview will draw all of the elements instead of just what is visible on the screen. I ran into a very similar issue and was able to work around it by using ModelAdapter from FastAdapter . The idea is you create 1 adapter type that contains the content for your textviews and another type to hold your reward_list items.

var modelAdapter: ModelAdapter<RewardModel, GenericRewardItem>

modelAdapter = ModelAdapter({
    when (it) {
        is RewardModel.BodyContent -> BodyContentItem(it)
        is RewardModel.Reward -> RewardItem(it)
    }
})

val fastAdapter: FastAdapter<GenericJobDetailItem> = 
FastAdapter.with(listOf(modelAdapter))
recycler_view.apply {
    layoutManager = LinearLayoutManager(view.context)
    hasFixedSize()
    adapter = fastAdapter
}

val items = mutableListOf<RewardModel>()
items.add(RewardModel.BodyContent(/* All your body content */))
rewards.forEach {
    items.add(RewardModel.Reward(/* reward item */))
}

modelAdapter.setNewList(items)

FastAdapter ia a really nice library, I use it for all my adapter views now.

Answer 2

Change your RecyclerViews

layout_height:wrap_content

Then in your code

yourRecyclerview.setNestedScrollingEnabled(false);