Different images in listview, CustomBaseAdapter

Question

Hi i want to set different images to each row of a listview which is attached to a CustomBaseAdapter. I already have some code but i am getting a forceclose with a NullPointer in line 49 of the adapter.

convertView = mInflater.inflate(R.layout.test, null);

Can somebody please help to get this solved?

Thank you in advance.

Code main activity:

   private static int icons[] = {R.drawable.ic_dialog_time, R.drawable.eur};
    ...
      ArrayList<SearchResults> searchResults = GetSearchResults();
      kp.setAdapter(new MyCustomBaseAdapter(AndroidLogin.this, searchResults, icons));

Solution code CustomBaseAdapter:

public class MyCustomBaseAdapter extends BaseAdapter {

public int images[];
private static ArrayList<SearchResults> searchArrayList;

private LayoutInflater mInflater;

public static class ViewHolder {
       ImageView imgViewLogo;
       TextView txtNaam;
       TextView txtWaarde;
      }

 public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results, int[] images) {
 super();
   mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
   this.images = images;
   searchArrayList = results;
  }

public int getCount() {
   return searchArrayList.size();
  }

 public Object getItem(int position) {
   return searchArrayList.get(position);
  }

 public long getItemId(int position) {
   return position;
  }

 public View getView(int position, View convertView, ViewGroup parent) {
   ViewHolder holder;

   if (convertView == null) {
    holder = new ViewHolder();
    convertView = mInflater.inflate(R.layout.test, null);

    holder.imgViewLogo =(ImageView)convertView.findViewById(R.id.imgIcon);
    holder.txtNaam = (TextView) convertView.findViewById(R.id.naam);
    holder.txtWaarde = (TextView) convertView.findViewById(R.id.waarde);

   convertView.setTag(holder);
   } 
   else 
   {
   holder = (ViewHolder) convertView.getTag();
   }

   holder.imgViewLogo.setImageResource(images[position%2]);
   holder.txtNaam.setText(searchArrayList.get(position).getNaam());
   holder.txtWaarde.setText(searchArrayList.get(position).getWaarde());


  return convertView;
  }

}

Edit Logcat:

11-19 17:27:06.894: E/AndroidRuntime(1103): FATAL EXCEPTION: main
11-19 17:27:06.894: E/AndroidRuntime(1103): java.lang.ArrayIndexOutOfBoundsException
11-19 17:27:06.894: E/AndroidRuntime(1103):     at com.sencide.MyCustomBaseAdapter.getView(MyCustomBaseAdapter.java:63)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.AbsListView.obtainView(AbsListView.java:1409)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.ListView.measureHeightOfChildren(ListView.java:1216)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.ListView.onMeasure(ListView.java:1127)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.View.measure(View.java:8313)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.TableRow.getColumnsWidths(TableRow.java:308)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.TableLayout.findLargestCells(TableLayout.java:500)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.TableLayout.measureVertical(TableLayout.java:465)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.TableLayout.onMeasure(TableLayout.java:431)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.View.measure(View.java:8313)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.LinearLayout.onMeasure (LinearLayout.java:309)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.View.measure(View.java:8313)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.View.measure(View.java:8313)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.View.measure(View.java:8313)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.ViewRoot.performTraversals(ViewRoot.java:839)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.os.Looper.loop(Looper.java:123)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at android.app.ActivityThread.main(ActivityThread.java:3683)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at java.lang.reflect.Method.invokeNative(Native Method)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at java.lang.reflect.Method.invoke(Method.java:507)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-19 17:27:06.894: E/AndroidRuntime(1103):     at dalvik.system.NativeStart.main(Native Method)

list.xml:

<ImageView 
    android:id="@+id/imgIcon"
    android:icon="@+drawable/icon"
    android:layout_width="wrap_content"
    android:layout_height="fill_parent"
    android:gravity="center_vertical"
    android:layout_alignParentTop="true"
    android:layout_alignParentBottom="true"
    android:layout_marginRight="15dp"
    android:layout_marginTop="5dp"
    android:layout_marginBottom="5dp" />

Answer 1

mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

you are missing this line in constructor. therefore mInflater is null, when you try to use it.

Adding the above line to your constructor should solve the NPE.

regarding your second NPE mentioned in the comment.. you forgot to use holder. change the following line to the one i gave in your code.

holder.imgViewLogo =(ImageView)convertView.findViewById(R.id.imgIcon);

regarding your third NPE ,mentioned in the comment again, since you are populating the list, position can be more than 2, which is not available in array, you should probably replace

images[position] 

with

images[position%2]