public void setDisplayOptions(int options) {
final int flagsChanged = mDisplayOptions == -1 ? -1 : options ^ mDisplayOptions;
mDisplayOptions = options;
if ((flagsChanged & DISPLAY_RELAYOUT_MASK) != 0) {
final boolean showHome = (options & ActionBar.DISPLAY_SHOW_HOME) != 0;
final int vis = showHome && mExpandedActionView == null ? VISIBLE : GONE;
mHomeLayout.setVisibility(vis);
if ((flagsChanged & ActionBar.DISPLAY_HOME_AS_UP) != 0) {
final boolean setUp = (options & ActionBar.DISPLAY_HOME_AS_UP) != 0;
mHomeLayout.setUp(setUp);
// Showing home as up implicitly enables interaction with it.
// In honeycomb it was always enabled, so make this transition
// a bit easier for developers in the common case.
// (It would be silly to show it as up without responding to it.)
if (setUp) {
setHomeButtonEnabled(true);
}
}
if ((flagsChanged & ActionBar.DISPLAY_USE_LOGO) != 0) {
final boolean logoVis = mLogo != null && (options & ActionBar.DISPLAY_USE_LOGO) != 0;
mHomeLayout.setIcon(logoVis ? mLogo : mIcon);
}
if ((flagsChanged & ActionBar.DISPLAY_SHOW_TITLE) != 0) {
if ((options & ActionBar.DISPLAY_SHOW_TITLE) != 0) {
initTitle();
} else {
removeView(mTitleLayout);
}
}
if (mTitleLayout != null
&& (flagsChanged & (ActionBar.DISPLAY_HOME_AS_UP | ActionBar.DISPLAY_SHOW_HOME)) != 0) {
final boolean homeAsUp = (mDisplayOptions & ActionBar.DISPLAY_HOME_AS_UP) != 0;
mTitleUpView.setVisibility(!showHome ? (homeAsUp ? VISIBLE : INVISIBLE) : GONE);
mTitleLayout.setEnabled(!showHome && homeAsUp);
}
if ((flagsChanged & ActionBar.DISPLAY_SHOW_CUSTOM) != 0 && mCustomNavView != null) {
if ((options & ActionBar.DISPLAY_SHOW_CUSTOM) != 0) {
addView(mCustomNavView);
} else {
removeView(mCustomNavView);
}
}
requestLayout();
} else {
invalidate();
}
// Make sure the home button has an accurate content description for accessibility.
if (!mHomeLayout.isEnabled()) {
mHomeLayout.setContentDescription(null);
} else if ((options & ActionBar.DISPLAY_HOME_AS_UP) != 0) {
mHomeLayout.setContentDescription(
mContext.getResources().getText(R.string.abs__action_bar_up_description));
} else {
mHomeLayout.setContentDescription(
mContext.getResources().getText(R.string.abs__action_bar_home_description));
}
}
