Java 以编程方式更改 Android 可绘制按钮图标
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Change Android Drawable Button Icon Programmatically
提问by Alexander Staroselsky
How would one change the android:srcXML property programatically of a FloatingActionButton or Button widget? I have a button defined as following within an activity:
如何以android:src编程方式更改FloatingActionButton 或 Button 小部件的XML 属性？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:srcset as follows:
它有一个初始android:src集合如下：
android:src="@android:drawable/ic_media_play"
I'm trying to utilize the setImageResource(int id)to change the android:srcXML property, but how to I access a Drawable icon such as ic_media_pauseafter a button click that occurs for example. When I try to pass in R.drawable.ic_media_pauseto the setImageResource()method I received an cannot resolve symbol error.
我正在尝试利用setImageResource(int id)来更改android:srcXML 属性，但是如何访问 Drawable 图标，例如ic_media_pause在发生单击按钮之后。当我尝试传入R.drawable.ic_media_pause该setImageResource()方法时，我收到了无法解析符号错误。
floatingActionButton.setImageResource(R.drawable.ic_media_pause);
floatingActionButton.setImageResource(R.drawable.ic_media_pause);
How do I get at the available R.drawableresources to pass it in as an argument.
我如何获取可用的R.drawable资源以将其作为参数传递。
Any help would be great appreciated. Thank you!
任何帮助将不胜感激。谢谢！
采纳答案by Andrew Senner
You're trying to access a default icon included in the SDK. You need to prefix your resource identifier with "android." For example:
您正在尝试访问 SDK 中包含的默认图标。您需要在资源标识符前加上“android”。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。
:)
:)
