CODEWITHSUNDEEP
toolbarandroid-coordinatorlayoutandroid-collapsingtoolbarlayout
Ronaldo
Ronaldo

Reputation: 774

CollapsingToolbarLayout Scrolling issues

I have a problem with the CollapsingToolbarLayout from the already in Android Studio given ScrollingActivity.

The scrolling down motion works perfectly, but when I want to scroll up, it always shows me that the end of the screen is reached without expanding the Toolbar again. To expand the Toolbar, I have to scroll up again, when the end of the screen is reached.

As I'm not really good in explaining the problem I uploaded a Video on YouTube so you can see it by yourself.

VIDEO: https://youtu.be/WrzsY2ooj9o

Also you can see a little bug in there too. The Toolbar collapses by itself sometimes just by making a "bad motion" with the finger, I think you can see it at 0:11.

Thankful for any Help!

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.appmac.ron.myapplication.ScrollingActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

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

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

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

    <include layout="@layout/content_scrolling" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:src="@android:drawable/ic_dialog_email"
        app:layout_anchor="@id/app_bar"
        app:layout_anchorGravity="bottom|end" />

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

Upvotes: 3

Views: 1398

Answers (2)

Pragati Singh
Pragati Singh

Reputation: 2523

With reference to Google issue tracker, Issue is resolved on latest library version 26.1.0.

If any issue persists, please report at Google issue tracker they will re-open to examine.

Upvotes: 0

MoneyCoder
MoneyCoder

Reputation: 41

update to 26.0.0-beta2. AppbarLayout should be work as expect. Details:Carry on Scrolling

Ok, I think a third party library can make it work. In fact, I decompiled others app and find this:)

All above was deperated, I find this. There is a easy way to solve this problem. Just set a OnScrollChangeListener listener to your nestedsrollview. The key code is below:

nestScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
  @Override
  public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX,
      int oldScrollY) {
    if(scrollY == 0) appBarLayout.setExpanded(true);  
  }
});

The animation will do by method appBarLayout itself.

Upvotes: 3

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