From the iosched app source I came up with this ButtonBar class:
/**
* An extremely simple {@link LinearLayout} descendant that simply reverses the
* order of its child views on Android 4.0+. The reason for this is that on
* Android 4.0+, negative buttons should be shown to the left of positive buttons.
*/
public class ButtonBar extends LinearLayout {
public ButtonBar(Context context) {
super(context);
}
public ButtonBar(Context context, AttributeSet attributes) {
super(context, attributes);
}
public ButtonBar(Context context, AttributeSet attributes, int def_style) {
super(context, attributes, def_style);
}
@Override
public View getChildAt(int index) {
if (_has_ics)
// Flip the buttons so that "OK | Cancel" becomes "Cancel | OK" on ICS
return super.getChildAt(getChildCount() - 1 - index);
return super.getChildAt(index);
}
private final static boolean _has_ics = Build.VERSION.SDK_INT >=
Build.VERSION_CODES.ICE_CREAM_SANDWICH;
}
This will be the LinearLayout that the "OK" and "Cancel" buttons go into, and will handle putting them in the appropriate order. Then put this in the layout you want the buttons in:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="?android:attr/dividerHorizontal"
android:orientation="vertical"
android:showDividers="middle">
<!--- A view, this approach only works with a single view here -->
<your.package.ButtonBar style="?android:attr/buttonBarStyle"
android:id="@+id/buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="1.0">
<Button style="?android:attr/buttonBarButtonStyle"
android:id="@+id/ok_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="@string/ok_button" />
<Button style="?android:attr/buttonBarButtonStyle"
android:id="@+id/cancel_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="@string/cancel_button" />
</your.package.ButtonBar>
</LinearLayout>
This gives you the look of the dialog with borderless buttons. You can find these attributes in the res in the framework. buttonBarStyle does the vertical divider and padding. buttonBarButtonStyle is set as borderlessButtonStyle for Holo theme, but I believe this should be the most robust way for displaying it as the framework wants to display it.
