Android-框架布局高度与协调器布局不匹配

问题描述

我的FrameLayout(抽屉式布局中的容器)有问题. FrameLayout的高度超过了屏幕高度(位于底部的android默认菜单按钮下方).

I have a problem with my FrameLayout (Container in Drawer Layout). The height of the FrameLayout exceeds the screen height (below the android default menu buttons at bottom).

<android.support.design.widget.CoordinatorLayout
        android:id="@+id/main_content"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/navContainer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:minHeight="?attr/actionBarSize"
                app:layout_scrollFlags="scroll|enterAlways" />

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

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

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

推荐答案

我的第一次尝试是在FrameLayout上设置android:layout_marginBottom="?attr/actionBarSize".这解决了对于没有垂直滚动内容的固定"高度的非滚动视图的解决方案(例如具有match_parent高度的常规RelativeLayout).将组件与父级底部(android:layout_alignParentBottom="true")对齐将生成一个仍可见的元素.在Android Studio的预览器中，看不到高度超过了.

My first attempt was to set a android:layout_marginBottom="?attr/actionBarSize" at the FrameLayout. This solved the solution for non-scrollable views having a "fixed" height in terms of no vertically scrollable content (like a usual RelativeLayout with match_parent height). Aligning a component to the parent bottom (android:layout_alignParentBottom="true") results in a still visible element. In Android Studio's Previewer the no exceeding of the height is visible.

但是，此marginBotton修补程序为其根视图可滚动的片段(如RecyclerView)引入了一个新问题.对于这些视图，向下滚动时，底部边距将在白色栏中显示(如果白色是背景色).这种接缝合理，因为对于那些视图，嵌套滚动功能将滑出工具栏

However, this marginBotton-fix introduces a new problem for fragments whose root view is scrollable (like a RecyclerView). For these views when scrolling down the bottom margin will become visible in a white bar (in case white is the background color). This seams reasonable, as for those views the nested scrolling feature will slide out the toolbar

tl; dr 我通过将?attr/actionBarSize作为底部边距应用于在Framelayout中显示的不可滚动片段来解决此问题.在此之前，我将工具栏的高度设置为?attr/actionBarSize.

tl;dr I worked around that issue by applying the the ?attr/actionBarSize as bottom margin to non-scrollable fragments that are shown inside the Framelayout. Prior to that I set the height of the toolbar to be ?attr/actionBarSize.

活动布局:

        <android.support.design.widget.AppBarLayout
            android:id="@+id/navContainer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_scrollFlags="scroll|enterAlways" />

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

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

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

片段布局:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:layout_marginBottom="?attr/actionBarSize"
          android:orientation="vertical">
          <!-- Further stuff here -->
          <TextView android:id="@+id/label"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_alignParentBottom="true"
          />
  </LinearLayout>

我现在面临的唯一不足是创建片段布局时要在Android Studio的预览器中显示的空白.

The only downside I faced right now is the white space to be shown in Android Studio's Previewer while creating the fragment layout.

这篇关于Android-框架布局高度与协调器布局不匹配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！