I have an Android project with Sherlock ActionBar and Support Library. In the onCreate of SherlockFragmentActivity I initialized ActionBar with 2 tabs:
private void configureActionBar(){
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tab = actionBar.newTab()
.setText("Events")
.setTabListener(new TabListener<SampleListFragment>(
this, "events", SampleListFragment.class));
actionBar.addTab(tab);
tab = actionBar.newTab()
.setText("Map")
.setTabListener(new TabListener<SupportMapFragment>(
this, "map", SupportMapFragment.class));
actionBar.addTab(tab);
}
The problem is when I go back to the first tab, the screen is black with grayed Map controls. If I turn off\\on the device screen, the Map completely removes and everyting is fine.
TabListener implementation is from the Google Manual:
public class TabListener<T extends Fragment> implements ActionBar.TabListener {
private Fragment mFragment;
private final Activity mActivity;
private final String mTag;
private final Class<T> mClass;
/** Constructor used each time a new tab is created.
* @param activity The host Activity, used to instantiate the fragment
* @param tag The identifier tag for the fragment
* @param clz The fragment's Class, used to instantiate the fragment
*/
public TabListener(Activity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
/* The following are each of the ActionBar.TabListener callbacks */
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
// Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = Fragment.instantiate(mActivity, mClass.getName());
ft.add(android.R.id.content, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
ft.attach(mFragment);
}
}
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
// Detach the fragment, because another one is being attached
ft.detach(mFragment);
}
}
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
// User selected the already selected tab. Usually do nothing.
}
}
I came across with similar issue once when implementing the SupportMapFragment with a SlidingMenu, after searching forums I found that it was an issue with surfaceView and that it could be fixed by setting the map transparent with this method:
private void setMapTransparent(ViewGroup group) {
int childCount = group.getChildCount();
for (int i = 0; i < childCount; i++) {
View child = group.getChildAt(i);
if (child instanceof ViewGroup) {
setMapTransparent((ViewGroup) child);
} else if (child instanceof SurfaceView) {
child.setBackgroundColor(0x00000000);
}
}
}
Just call that method on your SupportMapFragment's onCreateView.
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