refresh listView by clicking outside of it - android-listview

Question

I have a viewpager with an adapter that extends FragmentStatePagerAdapter, this has to show some fragment that always repeats the same layout (in whic there is a listView) for every page ... now the problem is how can I update the listView that is currently visible by clicking on a button that is outside of the Fragment? I can refresh only the ones that are in the not visible pages,but not the ones that are displayed or adjacent...
One possible solution is to reset the adapter, but it doesn't seems to be right one, because it' s slow... could you please help me?
public class MainActivity extends FragmentActivity implements OnClickListener{
#Override
protected void onCreate(Bundle arg0) {
// TODO Auto-generated method stub
super.onCreate(arg0);
setContentView(R.layout.layout1);
pagerAdapter = new AdapterPager(getSupportFragmentManager());
ctx=this;
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(pagerAdapter);
pagerTab=(PagerTabStrip) findViewById(R.id.pager_tab_strip);
mViewPager.setCurrentItem(paginaCentrale);
modifica=(ImageView)findViewById(R.id.modifica);
modifica.setOnClickListener(this);
}
#Override
public void onClick(View arg0) {
// TODO onClick
switch (arg0.getId()){
case R.id.modifica:
//here I would like to call the method caricaLista() of the fragment
break;
}
}
public static class AdapterPager extends FragmentStatePagerAdapter {
public AdapterPager(FragmentManager fm) {
super(fm);
}
#Override
public int getItemPosition(Object object) {
// TODO Auto-generated method stub
return super.getItemPosition(object);
}
#Override
public Fragment getItem(int i) {
Fragment fragment;
Bundle args = new Bundle();
args.putInt("position", i);
fragment=new Fragment1();
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
return 1000;}
#Override
public CharSequence getPageTitle(int i) {
String title=String.valueOf(i);
return title;
}
}
public static class Fragment1 extends Fragment implements OnItemClickListener{
int fragmentPosition;
ListView lv;
List<Lista> lista= new ArrayList<Lista>();
public Fragment1(){
}
public static Fragment1 newInstance(){
return new Fragment1();
}
#Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
caricaLista("")}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle
savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment1, container, false);
lv=(ListView) rootView.findViewById(R.id.listViewCompiti);
Bundle args = getArguments();
int position= args.getInt("position");
fragmentPosition=position;
lv.setOnItemClickListener(this);
homeListAdapter= new HomeListAdapterWithCache(ctx,R.layout.list_item_home,lista);
lv.setAdapter(homeListAdapter);
return rootView;
}

Answer 1

You have to store the Current Fragment into your MainActivity , and change every time the page changes.
So you call the method of the current fragments.
Check out how your MainActivity should look like:
public class MainActivity extends FragmentActivity implements OnClickListener{
&Fragment mCurrentFragment;*
protected void onCreate(Bundle arg0) {
super.onCreate(arg0);
setContentView(R.layout.layout1);
pagerAdapter = new AdapterPager(getSupportFragmentManager());
ctx=this;
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(pagerAdapter);
pagerTab=(PagerTabStrip) findViewById(R.id.pager_tab_strip);
mViewPager.setCurrentItem(paginaCentrale);
modifica=(ImageView)findViewById(R.id.modifica);
modifica.setOnClickListener(this);
*mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
mCurrentFragment = pagerAdapter.getItem(position);
}*
});
#Override
public void onClick(View arg0) {
// TODO onClick
switch (arg0.getId()){
case R.id.modifica:
*mCurrentFragment.caricaLista();*
break;
}
}
}