CODEWITHSUNDEEP
javaandroidindexoutofboundsexception
Pseduosance
Pseduosance

Reputation: 315

Android: Invalid index 0, size is 0. WHERE?

I'm getting an invalid index 0, size is 0 error and can't figure out where this is happening. I've been running the debugger and can't place it. All I know is what happens in my code before and what would happen after. Below I've posted the logcat, the code that finishes before the crash, and what would run after.

Here's the logcat:

  java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
        at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
        at java.util.ArrayList.get(ArrayList.java:308)
        at android.widget.HeaderViewListAdapter.isEnabled(HeaderViewListAdapter.java:164)
        at android.widget.ListView.dispatchDraw(ListView.java:3307)
        at android.view.View.draw(View.java:15174)
        at android.widget.AbsListView.draw(AbsListView.java:4318)
        at android.view.View.updateDisplayListIfDirty(View.java:14096)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.draw(View.java:15174)
        at android.view.View.updateDisplayListIfDirty(View.java:14096)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.support.v4.widget.DrawerLayout.drawChild(DrawerLayout.java:1089)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.updateDisplayListIfDirty(View.java:14091)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.View.draw(View.java:14895)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3407)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3201)
        at android.view.View.draw(View.java:15174)
        at android.widget.FrameLayout.draw(FrameLayout.java:592)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2695)
        at android.view.View.updateDisplayListIfDirty(View.java:14096)
        at android.view.View.getDisplayList(View.java:14119)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:266)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:272)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:311)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2531)
        at android.view.

Here's my code right before, which it finishes:

   @Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    Answer a = null;
    if(position -1 >= 0 && myAnswerNotices.size() > position -1){
        a = myAnswerNotices.get(position-1);
        QuestionFragment.clicked_Question = a.getQuestion();
    }

    // Go to question view
    Intent intent;

    if(QuestionFragment.clicked_Question.getType().equals( "poll"))
        intent = new Intent (getActivity(), PollViewActivity.class);
    else
        intent = new Intent (getActivity(), QuestionViewActivity.class);

    if(a != null) {
        if (preferences.contains("notice_" + a.getObjectId())) {
            editor.remove("notice_" + a.getObjectId());
            editor.commit();
        }

        if (myAnswerNotices != null && !myAnswerNotices.isEmpty() && myAnswerNotices.contains(a))
            myAnswerNotices.remove(a);
    }

    startActivity(intent);

}

Here's the code that should start after:

  @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left);
    setContentView(R.layout.activity_question_view);

    Toolbar toolbar = (Toolbar) findViewById(R.id.question_view_toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);

    share = (ImageButton) findViewById(R.id.questionView_share_image_button);
    emailButton = (Button) findViewById(R.id.questionView_email_button);
    title = (TextView) findViewById(R.id.questionView_title_text_view);
    username = (TextView) findViewById(R.id.questionView_askedBy_text_view);
    createdAt = (TextView) findViewById(R.id.questionView_createdAt_text_view);
    followingTextView = (TextView) findViewById(R.id.questionView_follow_textview);

    setupQuestion();
    setListeners();
    setupList();

}

@Colin:

myAnswerNotices is initialized as a member variable:

public class NotificationFragment extends Fragment
    implements AdapterView.OnItemClickListener, SwipeRefreshLayout.OnRefreshListener {

private final List<Answer> myAnswerNotices = new ArrayList<>();

and populated in an AsyncTask: public class RefreshTask extends AsyncTask> {

    @Override
    protected void onPreExecute() {
        mRefreshWrapper.setRefreshing(true);
       // Activity.pinAll();
    }

    @Override
    protected List<Answer> doInBackground(Object... params) {

        //myAnswerNotices.clear();
       // List<Activity> a_list = new ArrayList<>();
        try {
            activityNotifications.addAll(Activity.getQuery()
                    .whereEqualTo(Constants.kQollegeActivityTypeKey, Constants.kQollegeActivityTypeAnswerPosted)
                    .whereEqualTo(Constants.kQollegeActivityToUserKey, ParseUser.getCurrentUser())
                    .whereGreaterThan(Constants.kQollegeQuestionCreatedAtKey, checked)
                    .orderByDescending(Constants.kQollegeQuestionCreatedAtKey)
                    .include(Constants.kQollegeActivityAnswerKey)
                    .find());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        checked = Calendar.getInstance().getTime();
        editor.putLong("notification_checked",checked.getTime());
        editor.commit();


        for(String s : preferences.getAll().keySet()){
            if(s.contains("notice_")){
                String a_id = preferences.getString(s, null);
                if(a_id != null){
                    try {
                        myAnswerNotices.add(Answer.getQuery().get(a_id));
                    } catch (ParseException e) {
                        e.printStackTrace();
                    }
                }
            }
        }

        for(Activity a : activityNotifications){
            myAnswerNotices.add(a.getAnswer());
        }

        return myAnswerNotices;

    }

    @Override
    protected void onPostExecute(List<Answer> list) {
        if(!myAnswerNotices.isEmpty())
            mHeaderTextView.setVisibility(View.GONE);
        else {
            mHeaderTextView.setText("No notifications");
            mHeaderTextView.setVisibility(View.VISIBLE);
        }

        mRefreshWrapper.setRefreshing(false);

    }

@Varsha: Here is the code relating to my adapter initialization:

NotificationListAdapter mListAdapter = new NotificationListAdapter(getActivity(), R.layout.notification_list_item, myAnswerNotices);
    mRefreshWrapper.getListView().setAdapter(mListAdapter);
    mListAdapter.setNotifyOnChange(true);

@Titus: Here's my entire adapter class:

class NotificationListAdapter extends ArrayAdapter {

private final int mResourceId;
private final LayoutInflater inflater;
private final Context context;
private NotificationListItemHolder notificationView;
private Answer answer;

public NotificationListAdapter(Context ctx, int resourceId, List objects){
    super(ctx,resourceId,objects);
    mResourceId = resourceId;
    inflater = LayoutInflater.from(ctx);
    context = ctx;
}

@Override
public View getView (int position, View convertView, ViewGroup parent) {
    answer = (Answer) getItem(position);

    // Get or create cached eventView
    if(convertView == null){
        convertView =  inflater.inflate(mResourceId, null);
        notificationView = new NotificationListItemHolder(convertView);
        convertView.setTag(notificationView);
    }
    else {
        notificationView = (NotificationListItemHolder) convertView.getTag();
    }
    TextView name = notificationView.getPostedByTextView();
    name.setTag(answer);
    // Fill Data
    fillData();

    name.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Intent intent = new Intent(context, ProfileActivity.class);
            Answer a = (Answer) v.getTag();
            ParseUser u = a.getPostedBy();

            intent.putExtra("User", u.getObjectId());
            context.startActivity(intent);
        }
    });



    return convertView;
}

private void fillData(){
    try {
        Question q = answer.getQuestion().fetch();
        notificationView.getTitleTextView().setText(q.getTitle());
    } catch (ParseException e) {
        e.printStackTrace();
    }
    notificationView.getPostedByTextView().setText(answer.getPostedByText());
    notificationView.getCreatedAtTextView().setText(answer.getCreatedAtText());
}

}

Upvotes: 1

Views: 9257

Answers (1)

Ramesh Kumar
Ramesh Kumar

Reputation: 1229

Note: I don't have enough reputation to comment so writing this answer.

It's seems to getCount() method in adapter just override that method:

if(myAnswerNotices == null || myAnswerNotices.size()>0)
return myAnswerNotices.size();
else 
return 0;

I hope this will help. Thanks

Upvotes: 11

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