在XML中更改Spinner下拉箭头的颜色 [英] Change color of the drop down arrow of Spinner in XML

问题描述

正如我在问题中所写的那样，我想更改XML中的Spinner 的下拉箭头(默认箭头，而不是自定义箭头或类似的东西)的颜色，但是问题是我无法从XML引用任何东西.

有可能吗?如果可以，如何更改颜色?

谢谢.

解决方案

有三种方法可以实现.

1.通过代码:

在您的xml中，确保您的微调器具有ID.假设我们有一个ID为"spinner"的微调器.

在您的代码中，将以下内容添加到onCreate()中:

Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.getBackground().setColorFilter(getResources().getColor(R.color.red), PorterDuff.Mode.SRC_ATOP);

其中红色是您在values文件夹中的 colors.xml 中定义的颜色.

2.通过xml:

对于API 21 +:

<Spinner
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:backgroundTint="@color/red" />

或者如果您使用支持库，则可以使用:

<android.support.v7.widget.AppCompatSpinner
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:backgroundTint="@color/red" />

3.通过可绘制对象:

您可以使用此在线工具: http://android-holo-colors.com

这将为您希望使用首选颜色的任何视图生成自定义可绘制对象.确保选择微调器，然后下载资源.

As I wrote in my question, I want to change the color of the drop down arrow (the default arrow, not a custom arrow or something like that) of a Spinner in XML, but the problem is that I couldn't find anything to make reference to it from the XML.

Is it possible? If yes, how can I change the color?

Thanks in advance.

解决方案

There are three ways to achieve that.

1. Through code:

In your xml, make sure your spinner has an id. Let's say we have a spinner with id "spinner".

In your code, add the following in your onCreate():

Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.getBackground().setColorFilter(getResources().getColor(R.color.red), PorterDuff.Mode.SRC_ATOP);

where red is your defined color in colors.xml in the values folder.

2. Through xml:

For API 21+:

<Spinner
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:backgroundTint="@color/red" />

or if you use the support library, you can use:

<android.support.v7.widget.AppCompatSpinner
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:backgroundTint="@color/red" />

3. Through drawables:

You can use this online tool: http://android-holo-colors.com

This will generate custom drawables for any view you want with your preferred color. Make sure you select spinner, then download the resources.

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