以编程方式更改图层列表中形状的颜色

问题描述

如何以编程方式更改图层列表中形状的颜色(#000000)?

How can I programmatically change the color (#000000) of a shape in a layer list?

这是我的图层列表:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="#000000" /> // CHANGE THIS COLOR
        </shape>
    </item>
    <item android:left="5dp">
        <shape android:shape="rectangle">
            <solid android:color="@color/bg" />
        </shape>
    </item>
</layer-list>

推荐答案

首先，您需要为您的layer-list项目分配ID.

First of all you need to assign id to you layer-list item.

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- First assign id to the list item-->
    <item  android:id="@+id/your_shape">
        <shape android:shape="rectangle">
            <solid android:color="#000000" />
        </shape>
    </item>
    <item android:left="5dp">
        <shape android:shape="rectangle">
            <solid android:color="@color/bg" />
        </shape>
    </item>
</layer-list>

然后通过ID获取形状.

Then get your shape by id.

LayerDrawable shape = (LayerDrawable) getResources().getDrawable(R.drawable.your_shape)

您可以通过调用更改形状的颜色

And you can change the color of your shape by calling

shape.setColor(Color.Black); // changing to black color

编辑

因为getDrawable()已被弃用.使用以下代码行.

As getDrawable() has been deprecated. Use the following line of code.

LayerDrawable shape = (LayerDrawable) ContextCompat.getDrawable(YourActivity.this,R.drawable.your_shape)

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