OnCheckedChangedListener pour des cases à cocher chargés dans listview dans un fragment

Question

Je suis en train de déclarer un écouteur de changement pour toutes les cases qui sont chargés dans un listview, où le listview est également chargé par un fragment, voici mon code:

le fragment:

public class AddGroupMembersFragment extends Fragment{ 

    ArrayList<HashMap<Integer, Member>> groupMembersList; 
    ListView lv; 
    CheckBox checkBox; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.fragment_add_group_members, container, false); 
     groupMembersList = new ArrayList<>(); 
     lv = (ListView) rootView.findViewById(R.id.group_members_list); 
     new AddGroupMembersFragment.PostDataAsyncTask().execute(); 
     // Inflate the layout for this fragment 
     return rootView; 
    } 

    AdapterView.OnItemClickListener checkBoxChanged = new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) { 
      // AdapterView is the parent class of ListView 
      ListView lv = (ListView) arg0; 
      if(lv.isItemChecked(position)){ 
       if(selectAllSubmit.getVisibility()==View.INVISIBLE){ 
        selectAllSubmit.setVisibility(View.VISIBLE); 
       } 
      } 
     } 
    }; 

    public class PostDataAsyncTask extends AsyncTask<String, String, String> { 

     ... 

     @Override 
     protected void onPostExecute(String lenghtOfFile) { 
      lv.setAdapter(new GroupMembersListAdapter(getActivity(),groupMembersList,1)); 
      lv.setOnItemClickListener(checkBoxChanged); 
     } 
    } 

le item.xml listview:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical"> 
    <CheckBox 
     android:id="@+id/checkbox" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:focusable="false" 
     android:focusableInTouchMode="false" 
     android:buttonTint="@color/colorPrimary" /> 
     ... 

Je veux utiliser oncheckchangedlistener pas sur itemclicklistener, des suggestions?

Answer 1

Vous devez créer un adaptateur et l'affecter à votre liste.

Exemple:

class MyAdapter extends BaseAdapter { //or ArrayAdapter, or what you prefer 
    private final CompoundButton.OnCheckedChangeListener listener; 
    MyAdapter(CompoundButton.OnCheckedChangeListener listener) { 
     this.listener = listener; 
    } 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     View view = convertView; 
     if (view == null) { 
      view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_item); 
     } 
     CheckBox checkBox = view.findViewById(R.id.check_box_id); 
     checkBox.setOnCheckedChangeListener(listener); 
     return view; 

    } 
} 

Et dans votre fragment:

StackFragment public class étend Fragment implémente CompoundButton.OnCheckedChangeListener {

ListView listView; 
MyAdapter adapter; 

@Override 
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
    // do stuff here 
} 

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.fragment_add_group_members, container, false); 
    listView = (ListView) rootView.findViewById(R.id.group_members_list); 
    adapter = new MyAdapter(this); 
    listView.setAdapter(adapter); 
    return rootView; 

} 

}