具有TabLayout和ViewPager的CollapsingToolBarLayout

问题描述

我尝试使用CordinatorLayout和CollapsingToolbarLayout，TabLayout和ViewPager创建类似于图像中的布局.我的布局无法正确呈现.

Am try to create a layout similar to the one in the image using a CordinatorLayout and CollapsingToolbarLayout, TabLayout and ViewPager.My Layout doesn't render properly.

这是我的布局

<?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/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        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"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginStart="48dp"
            app:expandedTitleMarginEnd="64dp"
            android:fitsSystemWindows="true">

            <ImageView
                android:id="@+id/image"
                android:src="@drawable/thumb_placeholder"
                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"
                android:background="?attr/colorPrimary"
                app:layout_collapseMode="pin" />

            <android.support.design.widget.TabLayout
                xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:id="@+id/movie_tabs"
                app:tabGravity="fill"
                app:tabMode="fixed"
                android:background="@color/colorPrimary"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:tabTextColor="@color/textColorPrimary"
                app:tabSelectedTextColor="@color/textColorPrimary"
                app:tabIndicatorColor="@color/textColorPrimary"
                app:tabIndicatorHeight="4dp"
                app:paddingStart="20dp"
                app:paddingEnd="20dp">
            </android.support.design.widget.TabLayout>

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

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

    <android.support.v4.view.ViewPager
        android:id="@+id/movieviewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </android.support.v4.view.ViewPager>

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

在我的设备上对其进行测试，我得到了

Testing it on my device i get this

如果有内容，则ViewPager片段会覆盖TabLayout，如果没有内容，则将其显示在ImageView的顶部.我在做什么错，我仍然有点像Android初学者.

The ViewPager Fragment overlays the TabLayout if it has content and displays the TabLayout on top of the ImageView when there is no content.What am i doing wrong, i am still somewhat of an Android noob.

推荐答案

1. CollapsingToolbarLayout 需要一个 minHeight .这告诉父 AppBarLayout 它可以折叠多少.我假设您希望 Toolbar 和 TabLayout 停留在屏幕顶部(因为您使用的是 exitUntilCollapsed 滚动标记).我将使它们都具有 android:layout_height =?attr/actionBarSize" ，并使用该值的两倍作为 CollapsingToolbarLayout 的 minHeight .

1. CollapsingToolbarLayout needs a minHeight. This tells the parent AppBarLayout how much it can collapse. I assume you want the Toolbar and the TabLayout to stay at the top of the screen (because you are using the exitUntilCollapsed scroll flag). I would make both of those have android:layout_height="?attr/actionBarSize" and use double that value as the minHeight of the CollapsingToolbarLayout.

ViewPager 需要 app:layout_behavior ="@ string/appbar_scrolling_view_behavior" .

这篇关于具有TabLayout和ViewPager的CollapsingToolBarLayout的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！