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问题:

I am trying to create a CollapsingToolbarLayout and below it a listview, when the listview is scrolled the Toolbar should collapse, but its not working when scrolled the Toolbar is not collapsing.

Used this tutorial: http://android-developers.blogspot.in/2015_05_01_archive.html

Note: The FrameLayout contains the listview

    <LinearLayout 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="wrap_content"
        android:orientation="vertical"
        android:scrollbars="vertical">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="192dp"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbara"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    android:background="?attr/colorPrimary"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
            </android.support.design.widget.CollapsingToolbarLayout>
        </android.support.design.widget.AppBarLayout>

        <FrameLayout
            android:id="@+id/frame"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

The framelayout code:

<RelativeLayout 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"
    tools:context="ranjithnair02.com.supporttest.BlankFragment">

    <ListView
        android:id="@+id/rcyv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_marginBottom="10dp"
        android:layout_marginRight="10dp"
        android:src="@android:drawable/ic_search_category_default"
        app:borderWidth="0dp"
        app:elevation="5dp"
        app:rippleColor="@color/wallet_highlighted_text_holo_light" />
</RelativeLayout>

回答1:

You should use RecyclerView instead of ListView

Note: don't forget to update RecyclerView in Gradle file.

  compile 'com.android.support:recyclerview-v7:22.2.0'

回答2:

I did an example by using RecyclerView instead. The source code could be found here: https://github.com/jiahaoliuliu/MaterialDesignSample/tree/collapsingToolbars

There are a couple of things that you should take into account and the post does not says.

Use CoordinatorLayout as the main layout

Use a theme without ActionBar and set the toolbar as actionBar instead. You can do it by creating a special theme for the activity like this:

<!-- Indigo without actionbar when toolbar is used -->
<style name="IndigoWithoutActionBar" parent="Indigo">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

And in the AndroidManifest.xml file, do the follow:

<activity
    android:name=".CollapsingToolbarActivity"
    android:label="@string/app_name"
    android:theme="@style/IndigoWithoutActionBar"
    >
</activity>

Once this is done, set it on the Java code:

// Actionbar
final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);

Here is a functional xml code that I use.

<?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="@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"
            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" />

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

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/simpleRecyclerView"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        />

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

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回答3:

The problem is the RelativeLayout. Try replacing the FrameLayout with the ListView and then the FloatingButton. All wrapped in a CoordinatorLayout of course.

回答4:

<FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

回答5:

You need to add two things to the list view and it will work

android:nestedScrollingEnabled="true"

app:layout_behavior="@string/appbar_scrolling_view_behavior"

My working XML code is

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="@color/black"
    tools:context="com.example.pr20020897.samplapp.DisplayAllDataActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="200dp">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:collapsedTitleTextAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse"
            app:expandedTitleTextAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse"
            app:expandedTitleMarginStart="72dp"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/toolbar_image"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_collapseMode="parallax"
                android:scaleType="centerCrop"
                android:src="@drawable/db"
                android:contentDescription="image" />


            <android.support.v7.widget.Toolbar
                android:id="@+id/app_bar"
                android:layout_width="match_parent"
                android:layout_height="?actionBarSize"
                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                app:navigationIcon="@drawable/ic_arrow_back"
                app:contentInsetStart="72dp"
                app:layout_collapseMode="pin" />


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

    <ListView
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:id="@+id/listView"
        android:nestedScrollingEnabled="true"
        android:scrollbars="none"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:divider="#FF0000"
        android:background="@color/black"
        android:dividerHeight="1dp">
    </ListView>
</android.support.design.widget.CoordinatorLayout>

Hopefully help someone.