使用CollapsingToolbarLayout时Viewpager未出现 [英] Viewpager not appearing when using CollapsingToolbarLayout

问题描述

我一直在玩与周围的设计支持库和所遇到的，我希望有人能帮助我一个小问题。

我使用的含有倒塌parralax一个ImageView的一个CollapsingToolbar。在CollapsingToolbar，我ALSE有这应该是我的滚动一个ViewPager TabLayout。我的问题是，ViewPager不会出现。这个问题似乎只有当我把我的ViewPager layout_height到match_parent或WRAP_CONTENT出现。如果我将其设置为600dp的，那么问题就消失了，但随后的观点最终被一个固定的长度不是很漂亮。

任何帮助将是grealty AP preciated！

下面是我的XML

 ＆LT; android.support.design.widget.CoordinatorLayout
  的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
  的xmlns：程序=htt​​p://schemas.android.com/apk/res-auto
  机器人：ID =@ + ID / main_content
  机器人：layout_width =match_parent
  机器人：layout_height =match_parent
  机器人：fitsSystemWindows =真正的＆GT;  ＆LT; android.support.design.widget.AppBarLayout
    机器人：ID =@ + ID / appbar
    机器人：layout_width =match_parent
    机器人：layout_height =@扪/ detail_backdrop_height
    机器人：主题=@风格/ ThemeOverlay.AppCompat.Dark.ActionBar
    机器人：fitsSystemWindows =真
    ＆GT;    ＆LT; android.support.design.widget.CollapsingToolbarLayout
        机器人：ID =@ + ID / collapsing_toolbar
        机器人：layout_width =match_parent
        机器人：layout_height =match_parent
        应用：layout_scrollFlags =滚动| exitUntilCollapsed
        机器人：fitsSystemWindows =真
        应用：contentScrim =？ATTR / colorPrimary
        ＆GT;        ＆LT; ImageView的
            机器人：ID =@ + ID /背景
            机器人：layout_width =match_parent
            机器人：layout_height =match_parent
            机器人：fitsSystemWindows =真
            应用：layout_collapseMode =视差
            机器人：SRC =@绘制/ stock_image/＆GT;        ＆LT; android.support.v7.widget.Toolbar
            机器人：ID =@ + ID /工具栏
            机器人：layout_width =match_parent
            机器人：layout_height =？ATTR / actionBarSize
            应用：popupTheme =@风格/ ThemeOverlay.AppCompat.Light
            机器人：layout_gravity =顶
            /＆GT;        ＆LT; android.support.design.widget.TabLayout
            机器人：ID =@ + ID /标签
            机器人：layout_width =match_parent
            机器人：layout_height =WRAP_CONTENT
            机器人：layout_gravity =底/＆GT;    ＆LT; /android.support.design.widget.CollapsingToolbarLayout>  ＆LT; /android.support.design.widget.AppBarLayout>
  ＆LT; android.support.v4.widget.NestedScrollView
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent＆GT;    ＆LT;的LinearLayout
        机器人：layout_width =match_parent
        机器人：layout_height =match_parent
        机器人：方向=垂直
        ＆GT;        ＆LT; android.support.v4.view.ViewPager
            机器人：ID =@ + ID / viewpager
            机器人：layout_width =match_parent
            机器人：layout_height =match_parent
            机器人：背景=@机器人：彩色/白
            应用：layout_behavior =@字符串/ appbar_scrolling_view_behavior
            /＆GT;
    ＆LT; / LinearLayout中＆GT;
  ＆LT; /android.support.v4.widget.NestedScrollView>＆LT; /android.support.design.widget.CoordinatorLayout>
 

解决方案

您应该删除 NestedScrollView 和的LinearLayout 各级之间的 CoordinatorLayout 和 ViewPager ：

 ＆LT; android.support.design.widget.CoordinatorLayout＆GT;
  ＆LT; android.support.design.widget.AppBarLayout＆GT;
      ...
  ＆LT; /android.support.design.widget.AppBarLayout>  ＆LT; android.support.v4.view.ViewPager
    机器人：ID =@ + ID / viewpager
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent
    机器人：背景=@机器人：彩色/白
    应用：layout_behavior =@字符串/ appbar_scrolling_view_behavior/＆GT;＆LT; /android.support.design.widget.CoordinatorLayout>
 

与应用程序的视图：layout_behavior =@字符串/ appbar_scrolling_view_behavior 必须 CoordinatorLayout 的直接子是关于正确定位的 AppBarLayout 。

I've been playing around with the Design Support Library and have come across a little problem that I hope someone can help me out with.

I'm using a CollapsingToolbar which contain an ImageView which collapses in parralax. In the CollapsingToolbar, I alse have a TabLayout which is supposed to scroll my ViewPager. My issue is that the ViewPager doesn't appear. The issue seems to arise only when I set my ViewPager layout_height to match_parent or wrap_content. If I set it to 600dp, then the problem is gone but then the view ends up being a fixed length which isn't very nice.

Any help would be grealty appreciated!

Here's my XML

<android.support.design.widget.CoordinatorLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:id="@+id/main_content"
  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"
        >

        <ImageView
            android:id="@+id/backdrop"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:layout_collapseMode="parallax"
            android:src="@drawable/stock_image"/>

        <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"
            android:layout_gravity="top"
            />

        <android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"/>

    </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">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        >

        <android.support.v4.view.ViewPager
            android:id="@+id/viewpager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/white"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            />
    </LinearLayout>
  </android.support.v4.widget.NestedScrollView>

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

解决方案

You should remove the NestedScrollView and LinearLayout levels between your CoordinatorLayout and ViewPager:

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

  <android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

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

The view with app:layout_behavior="@string/appbar_scrolling_view_behavior must be a direct child of CoordinatorLayout to be positioned correctly in relation to the AppBarLayout.

这篇关于使用CollapsingToolbarLayout时Viewpager未出现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IT屋！