Loading images from url using Universal Image Loader gives nullpointer exception in Android

Question

I am trying to retrieve an image from a `URL` using a `Universal Image Loader` library. I am getting a `nullpointer exception`. I am using a `SimpleAdapter` to display the `Listview Image`. I have done the following coding. I am very much new to this library and hence guide me step by step. ``` protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_menu_items); i=getIntent(); imageLoader.getInstance(); ListView salad_list=(ListView)findViewById(R.id.salads); ListAdapter k=new SimpleAdapter(MenuItemsActivity.this,items,R.layout.menulist,new String[]{"Item_Name","Desc","Currency","Price"},new int[]{R.id.cat_name,R.id.textView1,R.id.textView2,R.id.textView3}) { @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub final View v = super.getView(position, convertView, parent); // TextView picpath=(TextView)v.findViewById(R.id.hide2); String s="http://166.62.17.20…

Accepted Answer

You should configure the configurations before doing anything, a wise option being setting up an Application class for doing it and mentioning its name as application name in the manifest.

```
    public class UILInitiator extends Application {
        private static Context context;

@Override
        public void onCreate() {
            super.onCreate();
            context = this;
            File cacheDir = StorageUtils.getOwnCacheDirectory(
                    getApplicationContext(),
                    "/sdcard/Android/data/random_folder_name_for_cache");

DisplayImageOptions options = new DisplayImageOptions.Builder()
                    .cacheInMemory(true).cacheOnDisc(true).build();

ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
                    getApplicationContext()).defaultDisplayImageOptions(options)
                    .discCache(new FileCountLimitedDiscCache(cacheDir, 100))
                    .build();

ImageLoader.getInstance().init(config);
        }
```

Then, only use your imageLoader to display images as:

```
ImageView thumbnailImage = (ImageView) view.findViewById(R.id.overview_image);      
String imageUrl = "url for image ";
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.displayImage(imageUrl, thumbnailImage);
```

Loading images from url using Universal Image Loader gives nullpointer exception in Android

Solution

Problem