问题
Somehow I'm not able to fully scroll inside my NestedScrollView. Inside my NestedScrollView is a TextView with a lot of text and a button below it. When I scroll down I can only see a the top part of the button (only a few pixels). It doesn't scroll far enough.
This is my layout:
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:stateListAnimator="@drawable/appbar_always_elevated"
android:layout_height="128dp">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|exitUntilCollapsed"
app:toolbarId="@+id/toolbar">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:title="@string/app_name"
app:layout_collapseMode="pin">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
style="@style/Text.Body1.Medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="@dimen/margin"
android:layout_marginTop="@dimen/margin"
android:layout_marginEnd="@dimen/margin"
android:text="@string/large_text"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/appbar"/>
<Button
android:id="@+id/continueButton"
style="@style/Widget.Button.Green"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/margin"
android:layout_marginStart="@dimen/margin"
android:layout_marginEnd="@dimen/margin"
android:layout_marginBottom="@dimen/margin"
android:text="@string/continue_text"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
回答1:
Change the height of the LinearLayout inside your NestedScrollView to be wrap_content.
The idea behind NestedScrollView and its single scrolling child is that the outside (the scroll view) should have some fixed / predetermined height, and the inside (the scrolling child) should have a dynamic height that is larger than the parent. After all, if the content isn't larger than the parent, then what's scrolling?
回答2:
You need to add android:fitsSystemWindows="true" in your CoordinatorLayout , AppBarLayout and CollapsingToolbarLayout ,
Read more about fitsSystemWindows
Why would I want to fitsSystemWindows?
Try this
<?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"
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="128dp"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|exitUntilCollapsed"
app:toolbarId="@+id/toolbar">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:title="@string/app_name">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/large_text" />
<Button
android:id="@+id/continueButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="continue_text" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
回答3:
This is my working .xml code .
Please Apply it.
strings.xml
<string name="appbar_scrolling_view_behavior" translatable="false">android.support.design.widget.AppBarLayout$ScrollingViewBehavior</string>
main_activity.xml file
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/adView">
<android.support.design.widget.AppBarLayout
android:id="@+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsingToolbarLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<!--app:contentScrim="?attr/colorPrimary"-->
<RelativeLayout
android:id="@+id/lay"
android:layout_width="match_parent"
android:layout_height="@dimen/inhouse_ad_card_height"
android:background="@drawable/app_gradient_square"
android:gravity="center"
android:orientation="vertical"
android:visibility="visible"
app:layout_collapseMode="parallax"
app:layout_scrollFlags="scroll|enterAlways">
<!--write tag here-->
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@drawable/bg_transition"
android:visibility="visible"
app:contentInsetEnd="@dimen/dim_10"
app:contentInsetStart="@dimen/dim_10"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
<RelativeLayout
android:id="@+id/layBtns"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">
<ImageView
android:id="@+id/btnSetting"
android:layout_width="@dimen/btn_height"
android:layout_height="@dimen/btn_height"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:gravity="center"
ads:srcCompat="@drawable/ic_editor_settings" />
<TextView
android:id="@+id/txtAppTitle"
style="@style/TitleFont"
android:layout_width="wrap_content"
android:layout_height="@dimen/img_btn_height"
android:layout_centerInParent="true"
android:gravity="center"
android:text="@string/display_name"
android:textColor="@color/white"
android:textSize="@dimen/font_size_extra_large"
android:visibility="gone" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusableInTouchMode="true"
android:orientation="vertical">
<!--write tag here-->
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
回答4:
Just change your NestedScrollView to this:
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:fillViewport="true">
回答5:
Try this
private void updateListViewHeight(ListView myListView) {
ListAdapter myListAdapter = myListView.getAdapter();
if (myListAdapter == null) {
return;
}
//get ListView height
int totalHeight = 0;
int adapterCount = myListAdapter.getCount();
for (int size = 0; size < adapterCount; size++) {
View listItem = myListAdapter.getView(size, null, myListView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
//Change Height of ListView
ViewGroup.LayoutParams params = myListView.getLayoutParams();
params.height = totalHeight + (myListView.getDividerHeight() * (adapterCount - 1));
myListView.setLayoutParams(params);
}
Pass your listview in the above method.
回答6:
For everyone's reference, since I just had the same problem. This is a known issue and has been fixed in com.google.android.material:material:1.3.0-alpha04
https://github.com/material-components/material-components-android/commit/a21a30026a33fc20cf7ad699d32d1298b84096c6
来源：https://stackoverflow.com/questions/53598676/not-be-able-to-fully-scroll-inside-a-nestedscrollview