NestedScrollView 不会滚动所有孩子

Question

I am using CollapsingToolbarLayout with NestedScrollView, and inside the NestedScrollView I have a list of items, but in the execution I can't scroll all of them.

In my example I'm not seeing the last TextView and some of the includes.

This is my activity_main.xml

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="256dp"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginStart="40dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/space"
                app:layout_collapseMode="pin"/>

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:elevation="7dp"/>

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

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

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:src="@drawable/ic_search"
        app:layout_anchor="@id/appbar"
        app:layout_anchorGravity="bottom|right"/>

    <!-- Your Scrollable View : Can be Nested Scroll View or Recycler View-->
    <android.support.v4.widget.NestedScrollView
        android:id="@+id/nestedScrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:paddingTop="10dp">

            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <include layout="@layout/item_nested_scrollview"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="LastOne"/>

        </LinearLayout>

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

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

And this my list of items.

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="16dp"
    android:elevation="5dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="15dp"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Smartherd"
            android:textColor="@color/colorPrimary"
            android:textSize="20sp"
            android:textStyle="bold"/>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:text="@string/description"
            android:textColor="@android:color/black"
            android:textSize="15sp"/>

    </LinearLayout>

</android.support.v7.widget.CardView>

This photo at the top And this one, when I scrolled all down as you can see it's not showing the textview even the cardview is not showing completly.

Answer 1

I found the answer, I added

android:paddingBottom="?attr/actionBarSize" 

for the Layout inside NestedScrollingView

Answer 2

When you are working with nested scroll views then you have to explicitly tell the app that which scroll to use on different elements. ParentLayout's scroll is activated by default. Below code helped me to activate my List's scroll inside a nested scroll View

yourListView.setOnTouchListener(new View.OnTouchListener() {
            // Setting on Touch Listener for handling the touch inside ScrollView
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // Disallow the touch request for parent scroll on touch of child view
                v.getParent().requestDisallowInterceptTouchEvent(true);
                return false;
            }
        });

EDIT

I'm just putting static data in the XML file, how can I use your function?

I think then you should put your code inside a ScrollView

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout 
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       xmlns:android="http://schemas.android.com/apk/res/android">
       <ScrollView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <LinearLayout 
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:orientation="vertical">
                  <!-- Content here -->
            </LinearLayout>
      </ScrollView>
 </LinearLayout>

Source

Answer 3

When using CoordinatorLayout and collapsing toolbar you have to define your toolbar as actionbar in java file like that

toolbar=view.findViewById(R.id.toolbar);

if fragment ((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);

if activity setSupportActionBar(toolbar);

And also use in xml of toolbar app:popupTheme="@style/AppTheme.PopupOverlay"

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

also remove any margings or min heights .this solved my problem.