Hack around collapsed tab dropdown selection bug in ICS and ActionBarSherlock

actionbar_collapsed_tabs_hack.java

 
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
 
selectInSpinnerIfPresent(position, true);
}
 
 
/**
* Hack that takes advantage of interface parity between ActionBarSherlock and the native interface to reach inside
* the classes to manually select the appropriate tab spinner position if the overflow tab spinner is showing.
*
* Related issues: https://github.com/JakeWharton/ActionBarSherlock/issues/240 and
* https://android-review.googlesource.com/#/c/32492/
*
* @author [email protected]
*/
private void selectInSpinnerIfPresent(int position, boolean animate) {
try {
View actionBarView = findViewById(R.id.abs__action_bar);
if (actionBarView == null) {
int id = getResources().getIdentifier("action_bar", "id", "android");
actionBarView = findViewById(id);
}
 
Class<?> actionBarViewClass = actionBarView.getClass();
Field mTabScrollViewField = actionBarViewClass.getDeclaredField("mTabScrollView");
mTabScrollViewField.setAccessible(true);
 
Object mTabScrollView = mTabScrollViewField.get(actionBarView);
if (mTabScrollView == null) {
return;
}
 
Field mTabSpinnerField = mTabScrollView.getClass().getDeclaredField("mTabSpinner");
mTabSpinnerField.setAccessible(true);
 
Object mTabSpinner = mTabSpinnerField.get(mTabScrollView);
if (mTabSpinner == null) {
return;
}
 
Method setSelectionMethod = mTabSpinner.getClass().getSuperclass().getDeclaredMethod("setSelection", Integer.TYPE, Boolean.TYPE);
setSelectionMethod.invoke(mTabSpinner, position, animate);
Method requestLayoutMethod = mTabSpinner.getClass().getSuperclass().getDeclaredMethod("requestLayout");
requestLayoutMethod.invoke(mTabSpinner);
 
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}