java.lang.NullPointerException in Arrayadapter in android

Question

Null pointer exception during adding data on arrayadapter. getting error

E/AndroidRuntime(9233): FATAL EXCEPTION: main

E/AndroidRuntime(9233):java.lang.NullPointerException E/AndroidRuntime(9233): at co.adapter.TopicCustomDisplayArrayAdapter.getView(TopicCustomDisplayArrayAdapter.java:415)

E/AndroidRuntime(9233): at co.utils.TwoWayView.obtainView(TwoWayView.java:5599) E/AndroidRuntime(9233): at co.utils.TwoWayView.onMeasure(TwoWayView.java:3899) E/AndroidRuntime(9233): at android.view.View.measure(View.java:12773)

Doing this on my code:

 private View convertView;
 Holder holderText = null;
public TopicCustomDisplayArrayAdapter(Context context,
        ArrayList<fieldModel> arrayList) {
    super(context, R.layout.custom_display, arrayList);
    mInflater = (LayoutInflater) getContext().getSystemService(
        Context.LAYOUT_INFLATER_SERVICE);
    customTopicAd = arrayList;

    mcontext = context;
    options = new DisplayImageOptions.Builder().cacheInMemory(true)
        .cacheOnDisc(true).considerExifParams(true)
        .bitmapConfig(Bitmap.Config.RGB_565).build();
    }

    @Override
    public View getView(final int position, View cv, ViewGroup parent) {

    convertView = cv;

    AdTypeString = customTopic.get(position).getAd_Type();

    if (AdTypeString.equalsIgnoreCase("Text Ads")) {

        if (convertView == null) {
        convertView = mInflater.inflate(R.layout.text_view,
            parent, false);

        holderText = new Holder();
        holderText.textRelativeLayout = (RelativeLayout) convertView
            .findViewById(R.id.relativeTextAdView);

        convertView.setTag(holderText);
        } else {
        holderText = (Holder) convertView.getTag();
        }
        int widthTextAd = Integer.parseInt(customTopicAd.get(position)
            .getWidht());
        int heightTextAd = Integer.parseInt(customTopicAd.get(position)
            .getHeight();

        holderText.textRelativeLayout.getLayoutParams().width = widthTextAd;
        holderText.textRelativeLayout.getLayoutParams().height = heightTextAd;
        } else if (AdTypeString.equalsIgnoreCase("Image Ads")) {
       // display another layout
        }
   return convertView;
   }
  public static class Holder {
// Display Ads Resrouces

public RelativeLayout textRelativeLayout;


}

height and widht getting properly but could not set height and widht on relative layout. getting on this line:

holderText.textRelativeLayout.getLayoutParams().width = widthTextAd; holderText.textRelativeLayout.getLayoutParams().height = heightTextAd;

Any idea how to correction this error. here arraylist size is 5.

Giru Bhai · Accepted Answer · 2015-06-03 11:04:19Z

3

It seems that getLayoutParams() causes nullpointer because textRelativeLayout has not have any layout params or any size.If you want to set textRelativeLayout's size,you may consider to set layoutParams of this view. So Change

holderText.textRelativeLayout.getLayoutParams().width = widthTextAd;
holderText.textRelativeLayout.getLayoutParams().height = heightTextAd;

to

TwoWayView.LayoutParams lp = new TwoWayView.LayoutParams(widthTextAd, heightTextAd);
holderText.textRelativeLayout.setLayoutParams(lp);

edited Jun 3, 2015 at 11:04

answered Jun 3, 2015 at 9:46

Giru Bhai

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7 Comments

Bixms Over a year ago

I added LayoutParams LP = new LayoutParams(widthTextAd, heightTextAd); holderText.textRelativeLayout.setLayoutParams(LP); and still getting same error. if i add your above relative layout code, the casting problem, :java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to co.utils.TwoWayView$LayoutParams

Bixms Over a year ago

Still getting same error on line: holderText.textRelativeLayout.setLayoutParams(LP);

Giru Bhai Over a year ago

Use it as TwoWayView.LayoutParams lp = new TwoWayView.LayoutParams(widthTextAd, heightTextAd); see edit.

Bixms Over a year ago

sorry, it could not help for me. still getting same type of error.i dont know how to get such type of error. thank you for your comments.

Bixms Over a year ago

i think, holderText not recognized properly.but i defined already, why getting error? if i remove this line of code then next error comes holderText.textviewName. so any idea?

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