如何改变后退箭头的颜色，在新材料的主题？ [英] How to change color of the back arrow in the new material theme?

问题描述

我已经更新了我的SDK API 21现在返回/向上图标是一个黑色箭头指向左侧。

I've updated my SDK to API 21 and now the back/up icon is a black arrow pointing to the left.

我想它是灰色的。我该怎么办呢？

I would like it to be grey. How can I do that?

在Play商店，例如，箭头是白

In the Play Store, for example, the arrow is white.

我做这个设置一些样式。我已经使用 @绘制/ abc_ic_ab_back_mtrl_am_alpha 为 homeAsUpIndicator 。这可绘制是透明的（只有阿尔法），但箭头显示为黑色。我不知道我是否可以设置颜色像我这样的 DrawerArrowStyle 。或者，如果唯一的解决办法就是创建我的 @绘制/ grey_arrow ，并将其用于 homeAsUpIndicator 。

I've done this to set some styles. I have used @drawable/abc_ic_ab_back_mtrl_am_alpha for homeAsUpIndicator. That drawable is transparent (only alpha) but the arrow is displayed in black. I wonder if I can set the color like I do in the DrawerArrowStyle. Or if the only solution is to create my @drawable/grey_arrow and use it for homeAsUpIndicator.

<!-- Base application theme -->
<style name="AppTheme" parent="Theme.AppCompat.Light">

    <item name="android:actionBarStyle" tools:ignore="NewApi">@style/MyActionBar</item>
    <item name="actionBarStyle">@style/MyActionBar</item>

    <item name="drawerArrowStyle">@style/DrawerArrowStyle</item>

    <item name="homeAsUpIndicator">@drawable/abc_ic_ab_back_mtrl_am_alpha</item>
    <item name="android:homeAsUpIndicator" tools:ignore="NewApi">@drawable/abc_ic_ab_back_mtrl_am_alpha</item>
</style>

<!-- ActionBar style -->
<style name="MyActionBar" parent="@style/Widget.AppCompat.Light.ActionBar.Solid">

    <item name="android:background">@color/actionbar_background</item>
    <!-- Support library compatibility -->
    <item name="background">@color/actionbar_background</item>
</style>

<!-- Style for the navigation drawer icon -->
<style name="DrawerArrowStyle" parent="Widget.AppCompat.DrawerArrowToggle">
    <item name="spinBars">true</item>
    <item name="color">@color/actionbar_text</item>
</style>

我的解决方案迄今已采取 @绘制/ abc_ic_ab_back_mtrl_am_alpha ，这似乎是白色的，写生，在我的愿望使用照片编辑器的颜色。它的工作原理，但我会preFER使用 @色/ actionbar_text 像 DrawerArrowStyle 。

My solution so far has been to take the @drawable/abc_ic_ab_back_mtrl_am_alpha, which seems to be white, and paint it in the color I desire using a photo editor. It works, although I would prefer to use @color/actionbar_text like in DrawerArrowStyle.

推荐答案

您可以通过code ++实现的。获取后退箭头绘制，修改它的颜色过滤器，并将其设置为后退按钮。

You can achieve it through code. Obtain the back arrow drawable, modify its color with a filter, and set it as back button.

final Drawable upArrow = getResources().getDrawable(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
upArrow.setColorFilter(getResources().getColor(R.color.grey), PorterDuff.Mode.SRC_ATOP);
getSupportActionBar().setHomeAsUpIndicator(upArrow);

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