CollapsingToolbarLayout 副标题 [英] CollapsingToolbarLayout subtitle

问题描述

我可以设置

Am I able to set the title of a CollapsingToolbarLayout via the setTitle method?

Is there also a way to set a subtitle?

解决方案

If you want the subtitle to go to Toolbar when the AppBar is fully collapsed you should create your custom CoordinatorLayout.Behaviour Like this: Github Guide

But if you just want a smaller text behind the title when the AppBar is expanded you can try this layout:

<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="300dp"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginBottom="160dp"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="48dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">
            <ImageView
                android:id="@+id/header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/quila2"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                app:layout_collapseMode="parallax" />
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="16sp"
                android:textColor="@android:color/white"
                android:layout_marginBottom="32dp"
                android:layout_marginEnd="64dp"
                android:layout_marginStart="48dp"
                app:layout_collapseMode="parallax"
                android:layout_gravity="bottom"
                android:text="Lorem Ipsum Iran Lorem Ipsum Iran Lorem Ipsum Iran Lorem Ipsum Iran Lorem Ipsum Iran Lorem Ipsum Iran Lorem Ipsum Iran Lorem Ipsum Iran "/>
            <android.support.v7.widget.Toolbar
                android:id="@+id/anim_toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
        </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">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:lineSpacingExtra="8dp"
            android:text="@string/lorem"
            android:textSize="18sp"/>

    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:clickable="true"
        android:src="@drawable/abc_ic_search_api_mtrl_alpha"
        app:layout_anchor="@+id/appbar"
        app:layout_anchorGravity="bottom|right|end" />

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

Notice that here I set the AppBar height as 300dp and the app:expandedTitleMarginBottom is 160dp so the title won't go down and conflict with the out subtitle. In this example you should set CollapsingToolbarTitle dynamically in the runtime with collapsingToolbarTitle.setTitle("My Title"); method.

The result will be something like this:

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