NullPointerException in custom adapter getView

android, listadapter, nullpointerexception

Solution

Change this:

vi = inflater.inflate(R.layout.result_list_item, null);

To this:

vi = inflater.inflate(R.layout.result_list_item, parent, false);

this is how your adapter should be:

public class NoPicAdapter extends ArrayAdapter<NewAndCalendar> {

    private ArrayList<NewAndCalendar> data;
    private Activity mActivity;
    private LayoutInflater inflater = null;

    public NoPicAdapter(Activity a, ArrayList<NewAndCalendar> d) {
        super(a, R.layout.no_pic_list_item, d);
        mActivity = a;
        data = d;
        inflater = (LayoutInflater) mActivity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }


    @Override
    public View getView(int position, @Nullable View convertView, ViewGroup parent) {
        View vi = convertView;
        if (vi == null)
            vi = inflater.inflate(R.layout.no_pic_list_item, parent, false);
        TextView title = (TextView) vi.findViewById(R.id.noPicTitle);
        TextView subtitle = (TextView) vi.findViewById(R.id.noPicSubtitle);

        title.setText(data.get(position).getmTitle());
        subtitle.setText(data.get(position).getmPubDate());

        return vi;
    }

}

Problem

I'm coding a custom adapter for a ListView that has a custom list to it. obviously, I have to write the `getView` function. so here is my code: ``` /*1*/ public View getView(int position, View convertView, ViewGroup parent) { /*2*/ View vi = convertView; /*3*/ if (convertView == null) /*4*/ vi = inflater.inflate(R.layout.result_list_item, null); /*5*/ /*6*/ TextView title = (TextView) vi.findViewById(R.id.tvTitle); /*7*/ TextView subtitle = (TextView) vi.findViewById(R.id.tvSubTitle); /*8*/ ImageView image = (ImageView) vi.findViewById(R.id.imageView1); /*9*/ /*10*/ title.setText(data.get(position).getDescription().toString()); /*11*/ subtitle.setText(data.get(position).getDate().toString()); /*12*/ String img = "http://someLink/" + data.get(position).getId() + "a_t.jpg"; /*13*/ imageLoader.DisplayImage(img, image); /*14*/ return vi; /*15*/ } ``` But, I have noticed that on line number 6 the program crashes with a NullPointer exception. here is my crash report: ``` 04-18 09:33:32.745: E/AndroidRuntime(2209): FATAL EXCEPTION: main 04-18 09:33:32.745: E/AndroidRuntime(2209): java.lang.NullPointerException 04-18 09:33:32.745: E/AndroidRuntime(2209): at com.package.mojo.NoPicAdapter.getView(NoPicAdapter.java:46) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.AbsListView.obtainView(AbsListView.java:1554) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.ListView.measureHeightOfChildren(ListView.java:1264) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.ListView.onMeasure(ListView.java:1175) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.View.measure(View.java:8366) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.View.measure(View.java:8366) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.View.measure(View.java:8366) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.LinearLayout.measureVertical(LinearLayout.java:531) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.View.measure(View.java:8366) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.View.measure(View.java:8366) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.ViewRoot.performTraversals(ViewRoot.java:847) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.view.ViewRoot.handleMessage(ViewRoot.java:1868) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.os.Handler.dispatchMessage(Handler.java:99) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.os.Looper.loop(Looper.java:123) 04-18 09:33:32.745: E/AndroidRuntime(2209): at android.app.ActivityThread.main(ActivityThread.java:3691) 04-18 09:33:32.745: E/AndroidRuntime(2209): at java.lang.reflect.Method.invokeNative(Native Method) 04-18 09:33:32.745: E/AndroidRuntime(2209): at java.lang.reflect.Method.invoke(Method.java:507) 04-18 09:33:32.745: E/AndroidRuntime(2209): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847) 04-18 09:33:32.745: E/AndroidRuntime(2209): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605) 04-18 09:33:32.745: E/AndroidRuntime(2209): at dalvik.system.NativeStart.main(Native Method) ``` of course, the layout and the items themselves exist... any thoughts? update: when i look at the variables while debugging, I see that `vi` was not inflated (`vi == null`), why?

Original source