Using asyncTask to load Images into a custom Image adapter

Question

I am loading Images from web url using asynctask.

And at the same time I am trying to load images into a gallery using custom adapter. But the Gallery is shown with no Images.

activity,

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.property_image_adapter);
    Intent intent = getIntent();
    intent.getStringExtra("PropertyID");
    PropertyImagesList ImageList = new PropertyImagesList();
    img = ImageList
            .fetchPropertyImages(intent.getStringExtra("PropertyID"));
    //imgfromWebUrl=(ImageView)findViewById(R.id.imgfromWebUrl);
     propertyImageGallery = (Gallery) findViewById(R.id.gallery1);
    new LoadViewTask().execute();
}

private class LoadViewTask extends AsyncTask<Void, Integer, Bitmap> {
    // Before running code in separate thread
    @Override
    protected Bitmap doInBackground(Void... params) {
        View view;
        Bitmap x = null;
        for (int i = 0; i <= img.size() - 1; i++) {
            try {
                HttpURLConnection connection = (HttpURLConnection) new URL(
                        "url here"
                                + img.get(i).Source.trim())
                        .openConnection();
                connection.connect();
                connection.setReadTimeout(120000);
                InputStream input = connection.getInputStream();
                x = BitmapFactory.decodeStream(input);


            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return x;
    }

    @Override
    protected void onPostExecute(Bitmap result) {
        super.onPostExecute(result);
        Log.d("","On Post execute: " + result);
        //imgfromWebUrl.setImageBitmap(result);
        propertyImageGallery.setAdapter(new PropertyImageAdapter(Context, result));
    }
}
}

my custom adapter class,

public class PropertyImageAdapter extends BaseAdapter {
private Context ctx;
Bitmap pics;

public PropertyImageAdapter(Context c,Bitmap pics) {
    Log.d("","custom Adapter");
    ctx = c;        
    this.pics=pics;
}

@Override
public int getCount() {

    return 0;
}

@Override
public Object getItem(int arg0) {

    return arg0;
}

@Override
public long getItemId(int arg0) {

    return arg0;
}

@Override
public View getView(int arg0, View paramView, ViewGroup arg2) {

    View localView;
    Log.d("","getView: ");
    if (paramView == null) {
        localView = View.inflate(ctx,
                R.layout.property_image_adapter, null);
    } else {
        localView = paramView;
    }       
    ImageView imgfromWebUrl=(ImageView)localView.findViewById(R.id.imgfromWebUrl);      
    Log.d("", "pics[0]: "+pics);
    imgfromWebUrl.setImageBitmap(pics);
    imgfromWebUrl.setScaleType(ImageView.ScaleType.FIT_XY);
    imgfromWebUrl.setLayoutParams(new Gallery.LayoutParams(150, 150));
    return imgfromWebUrl;
}

 }

Layout,

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical" >

<Gallery
    android:id="@+id/gallery1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:spacing="10dip" >
</Gallery>

<ImageView
    android:id="@+id/imgfromWebUrl"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >
</ImageView>

</LinearLayout>

I don't where I have implemented wrong, but gallery is shown empty.

Please correct my code!! Any help is appreciated!!

You should reindex the gallery to show up new images. Let me know if this helped you. http://stackoverflow.com/questions/16008419/how-to-force-android-to-re-index-all-the-photos-on-the-phone — Sqeezer, Jun 19 '13 at 11:34
While you are at it, try [this](http://stackoverflow.com/questions/11778140/using-asynctask-to-load-images-into-a-custom-adapter?rq=1) and [this](http://stackoverflow.com/questions/11645026/a-custom-adapter-that-displays-different-images-from-the-web-in-a-list?rq=1) as well — verybadalloc, Jun 19 '13 at 11:38

score 0 · Answer 1 · answered Jul 04 '13 at 08:03

0

the getCount() is set to ZERO in your adapter, this means that your adapter will show ZERO "things"

i didnt read the code well, but this is a point that may make difference

answered Jul 04 '13 at 08:03

Ahmed Adel Ismail

2,168
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Using asyncTask to load Images into a custom Image adapter

1 Answers1