[英]Change Android Drawable Button Icon Programmatically
How would one change the android:src
XML property programatically of a FloatingActionButton or Button widget? 如何以编程方式更改FloatingActionButton或Button小部件的android:src
XML属性? I have a button defined as following within an activity: 我在活动中定义了一个按钮:
FloatingActionButton floatingActionButton = (FloatingActionButton) this.findViewById(R.id.start_button);
It has an initial android:src
set as follows: 它有一个初始的android:src
设置如下:
android:src="@android:drawable/ic_media_play"
I'm trying to utilize the setImageResource(int id) to change the android:src
XML property, but how to I access a Drawable icon such as ic_media_pause
after a button click that occurs for example. 我正在尝试利用setImageResource(int id)来更改android:src
XML属性,但是如何在按下单击按钮后访问一个Drawable图标,例如ic_media_pause
。 When I try to pass in R.drawable.ic_media_pause
to the setImageResource()
method I received an cannot resolve symbol error. 当我尝试将R.drawable.ic_media_pause
传递给setImageResource()
方法时,我收到了一个无法解决的符号错误。
floatingActionButton.setImageResource(R.drawable.ic_media_pause);
How do I get at the available R.drawable resources to pass it in as an argument. 如何获取可用的R.drawable资源以将其作为参数传递。
Any help would be great appreciated. 任何帮助将非常感谢。 Thank you! 谢谢!
You're trying to access a default icon included in the SDK. 您正尝试访问SDK中包含的默认图标。 You need to prefix your resource identifier with "android." 您需要在资源标识符前加上“android”。 For example: 例如:
floatingActionButton.setImageResource(android.R.drawable.ic_media_pause);
this will allow you to reference the default icons. 这将允许您引用默认图标。
:) :)
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