Ich möchte wie das Bild Kategorie und Produkte laden gezeigt: frag Android erstellt dynamische Fragmente mit dynamischen Daten mit Gridview und Realm DB?
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
Category ctID = mSubCategory.get(position);
int id = ctID.getCategory_id();
return PlaceholderFragment.newInstance(getBaseContext(),id);
}
@Override
public int getCount() {
// Set number of fragments to be created
if(SubCategoriesCount == 0) {
Category ct;
ct = mSubCategory.get(0);
if (ct != null)
return 1;
}
return SubCategoriesCount;
}
}
Erstellen Fragment newInstance Verwendung mit unterschiedlichen Daten.
PlaceholderFragment.java
public class PlaceholderFragment extends Fragment {
private static final String FragmentCategoryID = "CategoryID";
private static Context cTx;
private static String catName;
public PlaceholderFragment() {
}
public static PlaceholderFragment newInstance(Context ctx, int id){
PlaceholderFragment fragment = new PlaceholderFragment();
cTx = ctx;
Log.d("New Fragment Created ", ":" + id);
Bundle args = new Bundle();
args.putInt(FragmentCategoryID, id);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_category_products_view, container, false);
RealmResults<Product> ProductList;
ProductList = GetProducts(getArguments().getInt(FragmentCategoryID));
Log.d("Fragment Arguments", "" + getArguments().getInt(FragmentCategoryID));
GridView gv = (GridView) rootView.findViewById(R.id.gridViewFrg);
gv.setAdapter(new AdapterRealmProduct(getActivity(), R.layout.grid_view_main, ProductList, true));
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(FragmentCategoryID))+ ":::"+catName);
return rootView;
}
private RealmResults<Product> GetProducts(int CategoryID){
RealmConfiguration realmConfigs;
realmConfigs = new RealmConfiguration.Builder(getActivity()).build();
Realm realmtm = Realm.getInstance(realmConfigs);
Category camt = realmtm.where(Category.class).equalTo("category_id", CategoryID).findFirst();
catName = camt.getName();
RealmResults<Product> results = realmtm.where(Product.class).equalTo("category_id", CategoryID).findAll();
try{
if(results != null && results.isValid()) {
return results;
}
}catch (IllegalStateException e){
e.printStackTrace();
}finally {
//realmtm.close();
}
return results;
}
}
Es mehrere Fragmente als Wert von SubCategoriesCount lädt erzeugt. Aber Daten in allen Fragmenten sind gleich. Mittel Alle GridViews auf allen Fragmenten haben dieselben Grid-Daten.
textView.setText(getString(R.string.section_format, getArguments().getInt(FragmentCategoryID))+ ":::"+catName);
Kategorie und ID zeigt .. aber Daten nicht ändert ... es könnte Realm Daten sein. Wie handle ich Realm-Handle in verschiedenen Activitis.