Collapsing toolBar Layout with Viewpager inside NestedScrollView
I am using Collapsing ToolBar Layout with NestedScrollView and Viewpager inside nested Scrollview.
I am having 3 tabs and having 3 fragments for these tabs. These fragments are using RecyclerView to set data.
Now with the nestedScrollView and viewpager, when I scroll the RecyclerView content, the collapsing effect is not working with this.
I need to put NestedScrollView also, as I am having some info that I need to show above Tabs.
Here is my code:
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
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"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:expandedTitleTextAppearance="@style/TransparentText">
<FrameLayout
android:id="@+id/carouselLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax">
<ImageView
android:id="@+id/coverImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/example"
android:scaleType="centerCrop"/>
<LinearLayout
android:layout_width="match_parent"
android:gravity="bottom"
android:orientation="vertical"
android:layout_gravity="bottom"
android:padding="@dimen/profile_image_margin"
android:background="@drawable/gradient_bg"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/profile_image_margin"
android:textSize="@dimen/text_size_xlarge"
android:textStyle="bold"
android:textColor="@color/white"
android:text="Title"
android:id="@+id/content_title"/>
</LinearLayout>
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:theme="@style/ActionBarThemeOverlay"
app:popupTheme="@style/ActionBarPopupThemeOverlay"
app:layout_scrollFlags="scroll|enterAlways"
android:background="@drawable/gradient_bg" />
</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:layout_gravity="fill"
android:isScrollContainer="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="sdjsfksdfsd"
android:textColor="@color/red"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="csdffsfsdfsdfsdf"
android:textColor="@color/red"/>
<android.support.design.widget.TabLayout
android:id="@+id/slidingTabs"
android:layout_width="match_parent"
app:tabMode="scrollable"
app:tabGravity="fill"
android:layout_height="wrap_content"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_height="300dp">
</android.support.v4.view.ViewPager>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
Please help me if you have any idea how to implement Recyclerview inside NestedScrollview in android, so that I can get this working.
It seems this was already answered here: https://stackoverflow.com/a/31561790/4931825
You can also check out this example provided in the aforementioned answer https://github.com/TheLittleNaruto/SupportDesignExample/
The Author created a custom NestedScrollView class extending NestedScrollView that overrode the onInterceptTouchEvent method like so:
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
final float x = ev.getX();
final float y = ev.getY();
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
xDistance = yDistance = 0f;
lastX = ev.getX();
lastY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
final float curX = ev.getX();
final float curY = ev.getY();
xDistance += Math.abs(curX - lastX);
yDistance += Math.abs(curY - lastY);
lastX = curX;
lastY = curY;
if (xDistance > yDistance)
return false;
}
return super.onInterceptTouchEvent(ev) || ev.getPointerCount() == 2;
}
and a custom ViewPager class extending ViewPager that overrode its onMeasure method like so:
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int height = 0;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int h = child.getMeasuredHeight();
if (h > height) height = h;
}
heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
Finally, he used both inside the CoordinatorLayout:
<com.thelittlenaruto.supportdesignexample.customview.MyNestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:id="@+id/lin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="visible">
<com.thelittlenaruto.supportdesignexample.customview.WrapContentHeightViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</com.thelittlenaruto.supportdesignexample.customview.MyNestedScrollView>
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