ExpandableListView IndexOutOfBoundException

Question

안드로이드의 ExpandableListView를 사용하는 데 문제가 있습니다. 시스템에 설치된 패키지 이름을 그룹으로 사용하고 노출 된 활동을 하위로 사용하는 확인란으로 간단한 확장 가능한 목록을 작성하려고합니다.

그것의 모든 난 85 여기 코드의 후 요소를 확장하려고까지 좋은 작업 :

public class ResultCheckbox extends ExpandableListActivity { 
    CheckBoxAdapter mAdapter; 
    ExpandableListView list; 

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




     setContentView(R.layout.check_list_layout); 

     ArrayList<ArrayList<CheckBoxes>> cbs = new ArrayList<ArrayList<CheckBoxes>>(); 

     ArrayList<String> groupNames = new ArrayList<String>(); 
     List<PackageInfo> pInfos = getPackageManager().getInstalledPackages(PackageManager.GET_ACTIVITIES); 
     for (PackageInfo pInfo : pInfos) { 
      groupNames.add(pInfo.packageName); 
      ActivityInfo[] aInfos = pInfo.activities; 
      ArrayList<CheckBoxes> cb = new ArrayList<CheckBoxes>(); 
      if (aInfos != null) { 
       for (ActivityInfo activityInfo : aInfos) { 
        String name = activityInfo.name; 
        String str[] = name.split("\\."); 
        cb.add(new CheckBoxes(str[str.length-1], false)); 

       } 
       cbs.add(cb); 
      } 
     } 

     mAdapter = new CheckBoxAdapter(this,groupNames, cbs); 
     setListAdapter(mAdapter); 


    } 


} 

어댑터 :

public class CheckBoxAdapter extends BaseExpandableListAdapter { 
    private ArrayList<String> packageName; 
    private ArrayList<ArrayList<CheckBoxes>> activityName; 
    private LayoutInflater inflater; 

    public CheckBoxAdapter(Context context, 
         ArrayList<String> packageName, 
         ArrayList<ArrayList<CheckBoxes>> activityName) { 
     this.packageName = packageName; 
     this.activityName = activityName; 
     inflater = LayoutInflater.from(context); 
    } 

    public Object getChild(int groupPosition, int childPosition) { 
     return activityName.get(groupPosition).get(childPosition); 
    } 

    public long getChildId(int groupPosition, int childPosition) { 
     return (long)(groupPosition*1024+childPosition); // Max 1024 children per group 
    } 

    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { 
     View v = null; 
     if(convertView != null) 
      v = convertView; 
     else 
      v = inflater.inflate(R.layout.child_row, parent, false); 
     CheckBoxes c = (CheckBoxes)getChild(groupPosition, childPosition); 
     TextView rgb = (TextView)v.findViewById(R.id.checkBox); 
     if(rgb != null) 
      rgb.setText(c.getActivityName()); 
     CheckBox cb = (CheckBox)v.findViewById(R.id.check1); 
     cb.setChecked(c.getState()); 
     return v; 
    } 

    public int getChildrenCount(int childPosition) { 
     return activityName.get(childPosition).size(); 
    } 

    public Object getGroup(int groupPosition) { 
     return packageName.get(groupPosition);   
    } 

    public int getGroupCount() { 
     return packageName.size(); 
    } 

    public long getGroupId(int groupPosition) { 
     return (long)(groupPosition*1024); // To be consistent with getChildId 
    } 

    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { 
     View v = null; 
     if(convertView != null) 
      v = convertView; 
     else 
      v = inflater.inflate(R.layout.group_row, parent, false); 
     String gt = (String)getGroup(groupPosition); 
     TextView pkgGroup = (TextView)v.findViewById(R.id.childname); 
     if(gt != null) 
      pkgGroup.setText(gt); 
     return v; 
    } 

    public boolean hasStableIds() { 
     return true; 
    } 

    public boolean isChildSelectable(int groupPosition, int childPosition) { 
     return true; 
    } 

    public void onGroupCollapsed (int groupPosition) {} 
    public void onGroupExpanded(int groupPosition) {} 


    } 

로그 캣 :

02-04 11:17:00.379: E/AndroidRuntime(4514): FATAL EXCEPTION: main 
02-04 11:17:00.379: E/AndroidRuntime(4514): java.lang.IndexOutOfBoundsException: Invalid index 91, size is 85 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at java.util.ArrayList.get(ArrayList.java:304) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at com.blast.makeyournotification.adapter.CheckBoxAdapter.getChildrenCount(CheckBoxAdapter.java:53) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.widget.ExpandableListConnector.refreshExpGroupMetadataList(ExpandableListConnector.java:563) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.widget.ExpandableListConnector.expandGroup(ExpandableListConnector.java:688) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.widget.ExpandableListView.handleItemClick(ExpandableListView.java:562) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.widget.ExpandableListView.performItemClick(ExpandableListView.java:522) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:2749) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.widget.AbsListView$1.run(AbsListView.java:3423) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.os.Handler.handleCallback(Handler.java:725) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.os.Handler.dispatchMessage(Handler.java:92) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.os.Looper.loop(Looper.java:137) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at android.app.ActivityThread.main(ActivityThread.java:5191) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at java.lang.reflect.Method.invoke(Method.java:511) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 
02-04 11:17:00.379: E/AndroidRuntime(4514):  at dalvik.system.NativeStart.main(Native Method) 

나는 조금 멍청하다. ( 왜 metod getChildrenCount가 나를 묶어 놓은 예외에서 풀어 주는지 이해가 안된다. childPosition이기 때문이다 그래서 여기 당신이 get 호출 할 때

public int getChildrenCount(int childPosition) { 
    return activityName.get(childPosition).size(); 
} 

및 값 : 다음 코드에 ArrayList 변수 activity의 크기보다 큰 int 값을 사용 할 수있다

Answer 1

사전에 감사합니다 크기보다 큰 경우 IndexOutOfBoundException을 입력하십시오. 작은 int 값으로 get을 호출하십시오.

Answer 2

aInfos == null 인 경우? pInfo.packageName은 추가하지만 체크 박스는 추가하지 않게됩니다. 이로 인해 packageName과 활동 목록간에 크기가 달라질 수 있습니다.

 
     for (PackageInfo pInfo : pInfos) { 
      groupNames.add(pInfo.packageName); 
      ActivityInfo[] aInfos = pInfo.activities; 
      ArrayList cb = new ArrayList(); 
      if (aInfos != null) { 
       for (ActivityInfo activityInfo : aInfos) { 
        String name = activityInfo.name; 
        String str[] = name.split("\\."); 
        cb.add(new CheckBoxes(str[str.length-1], false)); 

       } 
       cbs.add(cb); 
      } 
     }