作为标题。我正在使用Recyclerview显示我的物品。但是我需要在Recyclerview(具有wrap_content高度)上方的更多视图,因此我决定使用NestedScroll视图。但是令人毛骨悚然的是,当我设置Recyclerview.setHasFixedSize(true)时,这些项目不会显示出来。当我设置Recyclerview.setHasFixedSize(false)时。他们出现。如何设置Recyclerview.setHasFixedSize(true)并且项目仍然显示?
这是XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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_height="match_parent"
android:orientation="vertical"
android:layout_width="match_parent">
<include layout="@layout/appbar_layout"/>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:scrollbars="none"
android:fillViewport="true"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent">
<include layout="@layout/searchbar_layout"/>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:scrollbars="none"
android:nestedScrollingEnabled="false"
android:background="@color/white"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</LinearLayout>
这是商品行XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:weightSum="1"
android:gravity="center_vertical"
android:background="@color/white"
android:layout_height="wrap_content">
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_gravity="center_vertical"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAllCaps="false"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_weight="1"
android:textColor="@color/black"
android:textSize="@dimen/row_main_infor_text_size"
android:lines="1"
android:maxLines="1"
android:ellipsize="end"
android:textStyle="bold"
android:gravity="center_vertical"
/>
<TextView
android:layout_width="80dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:background="@drawable/lightgrey_radius_20_bg"
android:gravity="center"
android:textAllCaps="true"
android:textColor="@color/black"
android:textSize="@dimen/button_text_size" />
</LinearLayout>
这是JAVA代码:
RecyclerView.LayoutManager layoutManager_VERTICAL = new LinearLayoutManager(ForwardMessage.this, LinearLayoutManager.VERTICAL, false);
rv_all_friends = (RecyclerView) findViewById(R.id.rv_all_friends);
rv_all_friends.setLayoutManager(layoutManager_VERTICAL);
rv_all_friends.setHasFixedSize(true);
((SimpleItemAnimator) rv_all_friends.getItemAnimator()).setSupportsChangeAnimations(false);
rv_all_friends.setAdapter(mAllFriends_Adapter);