This might be silly question but I didn't understand Design lib well. I am following this reference to create below layout. The Blue area should work as parallax when I scroll the GridView
.
But when I scroll grid View nothing happens in AppBarLayout.
But This works with NestedScrollView
and RecyclerView
Below is My Layout file-
<?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: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:background="#500403"
android:layout_height="@dimen/detail_backdrop_height"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#122453"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:id="@+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<ImageView
android:id="@+id/backdrop1"
android:layout_width="50dp"
android:layout_height="50dp"
android:scaleType="fitCenter"
android:fitsSystemWindows="true"
android:layout_gravity="center"
android:src="@drawable/bar_offline"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#982223"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<GridView
android:id="@+id/grid"
android:numColumns="4"
android:background="#367723"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
/>
<android.support.design.widget.FloatingActionButton
android:layout_height="wrap_content"
android:layout_width="wrap_content"
app:layout_anchor="@id/appbar"
app:layout_anchorGravity="bottom|right|end"
android:src="@drawable/bar_offline"
android:layout_margin="@dimen/fab_margin"
android:clickable="true"/>
</android.support.design.widget.CoordinatorLayout>
Any help would be appreciated.
With ListView/GridView, it works only on Lollipop by following code-
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
listView.setNestedScrollingEnabled(true);
}
I think for Now CoordinatorLayout works only with RecyclerView
and NestedScrollView
use -
ViewCompat.setNestedScrollingEnabled(listView/gridview,true); (add Android Support v4 Library 23.1 or +)
A simple solution was added to the support lib:
ViewCompat.setNestedScrollingEnabled(listView,true);
I've tested it with Android Support v4 Library 23.1 and it works well.
Currently the ListView
and the GridView
have the expected behavior with the CoordinatorLayout
only with API>21.
To obtain this behavior you have to set:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
setNestedScrollingEnabled(true);
}
It is not enough to implement the NestedScrollingChild
.
The AbsListView
isn't deployed with support libraries , then it depends by the SO running in the device.
You have to override some methods in the AbsListView. For example you can check the onInterceptTouchEvent
method.
Inside this code you can see:
case MotionEvent.ACTION_DOWN: {
//......
startNestedScroll(SCROLL_AXIS_VERTICAL);
//....
}
case MotionEvent.ACTION_MOVE: {
//.....
if (startScrollIfNeeded((int) ev.getX(pointerIndex), y, null)) {
//....
}
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP: {
//..
stopNestedScroll();
break;
}
This code is only in the implementation of AbsListView v21+. If you check the AbsListView with API 20 or lower, you will not find any nested scroll reference.
You have to put gridview inside NestedScrollview as usual then you have to add gridview height dynamically. then everything would work good.!!!
<android.support.v4.widget.NestedScrollView
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:layout_gravity="fill_vertical"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<GridView
android:id="@+id/camp_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@id/toolbar"
android:layout_margin="10dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="3"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp"
android:visibility="visible" >
</GridView>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With