How does the CheckBox obtain it's respective drawables?
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alex2k8
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Published on 2011-01-11T22:22:02Z
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2011/01/11
22:53 UTC
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The CheckBox class extends the CompoundButton, but add nothing to it. But some how it obtains it's respective look. I found some declarations in Android sources, but wonder how they are mapped to CheckBox class?
public class CheckBox extends CompoundButton {
public CheckBox(Context context) {
this(context, null);
}
public CheckBox(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.checkboxStyle);
}
public CheckBox(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
}
Styles
<style name="Theme">
<item name="checkboxStyle">@android:style/Widget.CompoundButton.CheckBox</item>
</style>
<style name="Widget.CompoundButton.CheckBox">
<item name="android:background">@android:drawable/btn_check_label_background</item>
<item name="android:button">@android:drawable/btn_check</item>
</style>
EDIT:
Probably I was not clear... I understand how the drawable assigned to Widget.CompoundButton.CheckBox style, but how this style assigned to CheckBox class? I see the ".CheckBox" in the style name, but is this naming convention really what makes the trick? If so, what are the rules? If I derive MyCheckBox from CompoundButton, can I just define the Widget.CompoundButton.MyCheckBox style and it will work?
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