具有TabLayout和ViewPager的CollapsingToolBarLayout

本文介绍了具有TabLayout和ViewPager的CollapsingToolBarLayout的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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="schemas.android/apk/res/android" xmlns:app="schemas.android/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="schemas.android/apk/res/android" xmlns:app="schemas.android/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

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 .

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" .