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| public static 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(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(Tab tab, FragmentTransaction ft) { | |
| if (mFragment != null) { | |
| // Detach the fragment, because another one is being attached | |
| ft.detach(mFragment); | |
| } | |
| } | |
| public void onTabReselected(Tab tab, FragmentTransaction ft) { | |
| // User selected the already selected tab. Usually do nothing. | |
| } | |
| } |
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