[英]Action bar menu for each tab fragment with ActionBarSherlock
我無法使用ActionBarSherlock API為我的活動的每個片段使用選項菜單。
我已經把setHasOptionsMenu(true)
我里面onCreateView
,但onCreateOptionsMenu
內片段不會被調用。
我的主要活動
public class EvolutionActivity extends TabActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
addTab(getResources().getString(R.string.fragment_measurement_title), TabFragmentMeasurement.class, null);
addTab(getResources().getString(R.string.fragment_workout_title) , TabFragmentWorkout.class, null);
addTab(getResources().getString(R.string.fragment_exercise_title), TabFragmentExercise.class, null);
}
}
Tab活動抽象類 TabActivity.class
public abstract class TabActivity extends SherlockFragmentActivity {
private ViewPager mViewPager;
private TabsAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
/*
* Create the ViewPager and our custom adapter
*/
mViewPager = new ViewPager(this);
adapter = new TabsAdapter( this, mViewPager );
mViewPager.setAdapter( adapter );
mViewPager.setOnPageChangeListener( adapter );
/*
* We need to provide an ID for the ViewPager, otherwise we will get an exception like:
*
* java.lang.IllegalArgumentException: No view found for id 0xffffffff for fragment TabFragmentMeasurement{40de5b90 #0 id=0xffffffff android:switcher:-1:0}
* at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:864)
*
* The ID 0x7F04FFF0 is large enough to probably never be used for anything else
*/
mViewPager.setId( 0x7F04FFF0 );
super.onCreate(savedInstanceState);
/*
* Set the ViewPager as the content view
*/
setContentView(mViewPager);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.action_settings:{
Intent intent = new Intent(this, ParametersActivity.class);
startActivity(intent);
break;
}
}
return super.onOptionsItemSelected(item);
}
/**
* Add a tab with a backing Fragment to the action bar
* @param titleRes A string resource pointing to the title for the tab
* @param fragmentClass The class of the Fragment to instantiate for this tab
* @param args An optional Bundle to pass along to the Fragment (may be null)
*/
protected void addTab(int titleRes, Class fragmentClass, Bundle args ) {
adapter.addTab( getString( titleRes ), fragmentClass, args );
}
/**
* Add a tab with a backing Fragment to the action bar
* @param titleRes A string to be used as the title for the tab
* @param fragmentClass The class of the Fragment to instantiate for this tab
* @param args An optional Bundle to pass along to the Fragment (may be null)
*/
protected void addTab(CharSequence title, Class fragmentClass, Bundle args ) {
adapter.addTab( title, fragmentClass, args );
}
我的片段 TabFragmentMeasurement.class
public class TabFragmentMeasurement extends Fragment {
....... // Class' attributes
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
TextView txt = new TextView( inflater.getContext() );
....... // Change TextView's attributes
return txt;
}
@Override
public void onCreateOptionsMenu(Menu menu,MenuInflater inflater)
{
inflater.inflate(R.menu.measurement, menu);
super.onCreateOptionsMenu(menu,inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.item_add_measurement:{
// Add a measurement
}
default:
return super.onOptionsItemSelected(item);
}
}
}
XML菜單文件 measurement.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:showAsAction="never"
android:title="@string/action_settings"/>
<item
android:id="@+id/item_add_measurement"
android:icon="@android:drawable/ic_menu_add"
android:orderInCategory="1"
android:showAsAction="ifRoom"
android:title="@string/item_add_measurement"/>
</menu>
為什么不在fragment
類中擴展SherlockFragment
? 請記住,您傳遞的每個上下文(例如“ this”)都應跟隨:
this.getSherlockActivity().
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