ExpandableListview Comment Auto groupExpand - Android

Question

Quelqu'un peut-il m'aider s'il vous plaît comment développer automatiquement le groupe dans ma liste extensible, j'ai seulement un groupe. avec 5 articles. Je veux l'agrandir automatiquement, donc je n'ai pas besoin de cliquer dessus. Je groupExpand (0), mais ca marche pas :(.Voici mon code complet

public class ExpandActivity extends ExpandableListActivity { 

//String[] actions = new String[] { 
//  "", 
    // "Settings", 
    // "About", 

    //}; 
ListView listView ; 
TextView txtView; 


@SuppressLint("SimpleDateFormat") 
@SuppressWarnings({ "unchecked", "deprecation" }) 
public void onCreate(Bundle savedInstanceState) { 
    try{ 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.expand); 


      ((ExpandableListView) listView).expandGroup(0); 

    SimpleExpandableListAdapter expListAdapter = 
     new SimpleExpandableListAdapter(
       this, 
       createGroupList(),    // Creating group List. 
       R.layout.group_row,    // Group item layout XML.   
       new String[] { "Group Item" }, // the key of group item. 
       new int[] { R.id.row_name }, // ID of each group item.-Data under the key goes into this TextView.     
       createChildList(),    // childData describes second-level entries. 
       R.layout.child_row,    // Layout for sub-level entries(second level). 
       new String[] {"Sub Item"},  // Keys in childData maps to display. 
       new int[] { R.id.grp_child}  // Data under the keys above go into these TextViews. 
      ); 
     setListAdapter(expListAdapter);  // setting the adapter in the list. 

    }catch(Exception e){ 
     System.out.println("Errrr +++ " + e.getMessage()); 
    } 
} 

/* Creating the Hashmap for the row */ 
@SuppressWarnings("unchecked") 
private List createGroupList() { 
     ArrayList result = new ArrayList(); 
     for(int i = 0 ; i < 1 ; ++i) { // 15 groups........ 
     HashMap m = new HashMap(); 
     m.put("Group Item","Updates"); // the key and it's value. 

     result.add(m); 
     ((ExpandableListView) listView).expandGroup(0); 

     } 
     return (List)result; 



} 

/* creatin the HashMap for the children */ 
@SuppressWarnings("unchecked") 
private List createChildList() { 

    ArrayList result = new ArrayList(); 
    for(int i = 0 ; i < 1 ; ++i) { // this -15 is the number of groups(Here it's fifteen) 
     /* each group need each HashMap-Here for each group we have 3 subgroups */ 
     ArrayList secList = new ArrayList(); 
     for(int n = 0 ; n < 1 ; n++) { 
     HashMap child = new HashMap(); 
     child.put("Sub Item", "DILC");   
     secList.add(child); 
     } 
    result.add(secList); 


    ArrayList secList2 = new ArrayList(); 
    for(int n = 0 ; n < 1 ; n++) { 
    HashMap child = new HashMap(); 
    child.put("Sub Item", "OVRCD");    
    secList.add(child); 
    } 
result.add(secList2); 


ArrayList secList3 = new ArrayList(); 
    for(int n = 0 ; n < 1 ; n++) { 
    HashMap child = new HashMap(); 
    child.put("Sub Item", "UPD Information");   
    secList.add(child); 
    } 
result.add(secList3); 

ArrayList secList4 = new ArrayList(); 
    for(int n = 0 ; n < 1 ; n++) { 
    HashMap child = new HashMap(); 
    child.put("Sub Item", "UP System");    
    secList.add(child); 
    } 
result.add(secList4); 

ArrayList secList5 = new ArrayList(); 
    for(int n = 0 ; n < 1 ; n++) { 
    HashMap child = new HashMap(); 
    child.put("Sub Item", "All Updates");  
    secList.add(child); 
    } 
result.add(secList5); 

    }   
    return result; 
} 
public void onContentChanged () { 
    System.out.println("onContentChanged"); 
    super.onContentChanged();   
} 



/* This function is called on each child click */ 
@SuppressLint("NewApi") 
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,int childPosition,long id) { 
    ExpandableListAdapter adap = parent.getExpandableListAdapter(); 
    int gp = (int) adap.getGroupId(groupPosition); 
    int cp = (int) adap.getChildId(groupPosition, childPosition); 
    if (gp == 0) { 
     switch (cp) { 
     case 0: 
      Intent intent = new Intent(getApplicationContext(), 
       RssTabsActivity.class); 
       startActivity(intent); 
       overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
       break; 

      case 1: 
      Intent intent1 = new Intent(getApplicationContext(), 
        OVRCD.class); 
      startActivity(intent1); 
      overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
       break; 

      case 2:   
       Intent intent2 = new Intent(getApplicationContext(), 
         UPDInfo.class); 
       startActivity(intent2); 
       overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
       break; 
      case 3:   
      Intent intent3 = new Intent(getApplicationContext(), 
        UPSystem.class); 
       startActivity(intent3); 
       overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
       break; 

      case 4:   
       Intent intent4 = new Intent(getApplicationContext(), 
         ALLUPD.class); 
        startActivity(intent4); 
        overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
        break; 

      } 
     } else if (gp == 1) { 
      switch (cp) { 
      case 0: 
      Intent intent = new Intent(getApplicationContext(), 
        RssTabsActivity.class); 
      startActivity(intent); 
      overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
       break; 
      case 1: 
      Intent intent1 = new Intent(getApplicationContext(), 
        RssTabsActivity.class); 
      startActivity(intent1); 
      overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
       break; 
      case 2: 
       Intent intent2 = new Intent(getApplicationContext(), 
         RssTabsActivity.class); 
       startActivity(intent2); 
       overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
        break; 
      case 3: 
       Intent intent3 = new Intent(getApplicationContext(), 
         RssTabsActivity.class); 
       startActivity(intent3); 
       overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
        break; 
      case 4: 
       Intent intent4 = new Intent(getApplicationContext(), 
         RssTabsActivity.class); 
       startActivity(intent4); 
       overridePendingTransition(R.anim.right_slide_in, R.anim.right_slide_in); 
        break; 
      } 
     } 

     return true; 
    }; 




    @SuppressWarnings("null") 
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent){ 

     ExpandableListView expView = getExpandableListView(); 


     ContextThemeWrapper context = null; 
     expView.setChildIndicator(context.getResources().getDrawable(
       R.drawable.arrow_right)); 
     expView.setChildDivider(getResources().getDrawable(R.color.grey));   

     expView.setDividerHeight(2); 


     return parent; 

    } 




/* This function is called on expansion of the group */ 
public void onGroupExpand (int groupPosition) { 
    try{ 
     System.out.println("Group exapanding Listener => groupPosition = " + groupPosition); 
    }catch(Exception e){ 
     System.out.println(" groupPosition Errrr +++ " + e.getMessage()); 
    } 

} 

Answer 1

Appel expandGroup() après avoir configuré l'adaptateur sur votre listview, pas avant

Answer 2

faire de cette façon..:

   expList.setAdapter(mNewAdapter); 

       for (int i = 0; i < mNewAdapter.getGroupCount(); i++) 
        expList.expandGroup(i); 


       expList.setOnGroupClickListener(new OnGroupClickListener() { 
        @Override 
        public boolean onGroupClick(ExpandableListView parent, 
          View v, int groupPosition, long id) { 
         return true; // This way the expander cannot be 
             // collapsed 
        } 
       }); 

et:

<ExpandableListView 
     android:id="@+id/e_lodinfo" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:scrollbars="none" 
     android:groupIndicator="@null" 
     > 
    </ExpandableListView>