Android NavigationView:减少图标和文本之间的空间，并且`itemBackground`不起作用 [英] Android NavigationView: reduce space between icon and text and `itemBackground` not working

问题描述

在使用菜单xml构建NavigationView时，是否可以减少图标和文本之间的空间?

Is there a way to reduce the space between the icon and text in the NavigationView when its built using a menu xml?

我尝试使用app:itemTextAppearance属性输入文本android:drawablePadding，但这不起作用，我尝试设置填充和边距，但没有任何效果.

I've tried to text android:drawablePadding using the app:itemTextAppearance attribute and that doesn't work, I've tried setting the padding and margins and nothing works.

此外，当我设置app:itemBackground并设置选中状态时，整个菜单项都不会突出显示，我得到如下图所示的东西.

Also, when I set app:itemBackground and set the checked state, the entire menu item doesn't highlight, I get something like the picture below.

用于创建itemBackground的xml是:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@color/white_alpha_10" />
    <item android:state_checked="true" android:drawable="@color/white_alpha_10" />
    <item android:state_focused="true" android:drawable="@color/white_alpha_10" />
    <item android:state_activated="true" android:drawable="@color/white_alpha_10" />
    <item android:drawable="@android:color/transparent" />
</selector>

有什么想法吗?显然看起来菜单项上有背景色，但是菜单xml是相当普通的标准.

Any idea what could be going on? Clearly looks like there is a background color on the menu item, however the menu xml is pretty stock standard.

NavigationView将背景设置为紫色背景，

The NavigationView back the purple background on it set from a theme:

<!--Activity xml -->
<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:layout_gravity="start"
    app:theme="@style/AppTheme.NavigationView"
    app:menu="@menu/menu_nav_drawer"
    app:itemBackground="@drawable/nav_drawer_item"
    app:headerLayout="@layout/nav_header"/>

<!-- styles.xml -->
<style name="AppTheme.NavigationView" parent="Widget.Design.NavigationView">
    <item name="android:background">@color/charcoal_new</item>
    <item name="itemIconTint">@color/nav_drawer_icon</item>
    <item name="android:listDivider">@color/dusk_alpha_50</item>
    <item name="itemTextAppearance">@style/NavigationViewTextAppearance</item>
</style>

<style name="NavigationViewTextAppearance" parent="TextAppearance.Body.Regular">
    <item name="android:textColor">@color/white</item>
    <item name="android:padding">0dp</item>
    <item name="android:layout_margin">0dp</item>
</style>

我正在使用Android支持/设计库23.2.1.

I'm using Android support/design library 23.2.1.

推荐答案

在深入研究源代码之后.我发现您可以替代维度资源来解决此问题.

After digging through the source. I found that you could override a dimension resource to fix this.

<dimen tools:override="true" name="design_navigation_icon_padding">16dp</dimen>

请注意，尽管这样会改变各处的尺寸资源！ 您也许还可以复制布局文件并覆盖它，而不是design_navigation_menu.xml

Beware though that this will change the dimension resource everywhere! You may also be able to copy the layout file and override that instead design_navigation_menu.xml

对于不同的颜色边缘，我设置app:itemBackground="@android:color/transparent"，然后在NavigationView集的主题中设置:

As for the different color edges, I set app:itemBackground="@android:color/transparent" and then in the theme for the NavigationView set:

<item name="selectableItemBackground">@drawable/nav_drawer_item_selector</item>

您可以按如下方式在NavigationView的主题中处理这两个问题:

You can handle both in the theme for your NavigationView as follows:

    <item name="selectableItemBackground">@drawable/nav_drawer_item_selector</item>
    <item name="itemBackground">@color/transparent</item>

nav_drawer_item_selector.xml 看起来像这样:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@color/white_alpha_10" />
    <item android:state_checked="true" android:drawable="@color/white_alpha_10" />
    <item android:state_focused="true" android:drawable="@color/white_alpha_10" />
    <item android:state_activated="true" android:drawable="@color/white_alpha_10" />
    <item android:drawable="@color/transparent" />
</selector>

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