Trying to set ImageView from Url with Bitmap

Question

I am trying to set my ImageView.I have the url of the image and trying to make it bitmap and after set this bitmap to my ImageView.However, Bitmap result, argument of onPostExecute, is coming as null from download_Image function. It means ' BitmapFactory.decodeStream(is); ' is returning null.

this.ImageView1 = (ImageView) infoWindow.findViewById(R.id.ImageView1);
ImageView1.setTag(URL);

new AsyncTask<ImageView, Void, Bitmap>(){
 ImageView imageView = null;

    @Override
    protected Bitmap doInBackground(ImageView... imageViews) {
      final Bitmap[] b = new Bitmap[1];
      this.imageView = imageViews[0];

      activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
          b[0] =download_Image((String) imageView.getTag());
        }
      });

    return b[0];

    }

    @Override
    protected void onPostExecute(Bitmap result) {
      imageView.setImageBitmap(result);
    }

    public Bitmap download_Image(String url) {

    //---------------------------------------------------

      URL newurl = null;

      try {
        newurl = new URL(url);
      } catch (MalformedURLException e) {
         e.printStackTrace();
      }

      Bitmap mIcon_val = null;

      try {
        URLConnection urlConnection=newurl.openConnection();
        InputStream is=urlConnection.getInputStream();
        mIcon_val=BitmapFactory.decodeStream(is);
      } catch (Exception e) {
        e.printStackTrace();
      }

     return mIcon_val;

     //---------------------------------------------------

    }

}.execute(ImageView1);

How can I deal with that problem?

Answer 1

Use this code and comment if any problem`public class MainActivity extends AppCompatActivity {

private ImageView imageView;
private String imageUrl ="image url";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imageView = (ImageView)findViewById(R.id.imageview);

    new AsyncTask<ImageView, Void, Bitmap>(){
        ImageView imageView = null;

        @Override
        protected Bitmap doInBackground(ImageView... imageViews) {
            final Bitmap[] b = new Bitmap[1];
            this.imageView = imageViews[0];

                    b[0] =download_Image(imageUrl);

           return b[0];

        }

        @Override
        protected void onPostExecute(Bitmap result) {
            imageView.setImageBitmap(result);
        }

        public Bitmap download_Image(String url) {

            //---------------------------------------------------

            URL newurl = null;

            try {
                newurl = new URL(url);
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }

            Bitmap mIcon_val = null;

            try {
                URLConnection urlConnection=newurl.openConnection();
                InputStream is=urlConnection.getInputStream();
                mIcon_val= BitmapFactory.decodeStream(is);
            } catch (Exception e) {
                e.printStackTrace();
            }

            return mIcon_val;

            //---------------------------------------------------

        }

    }.execute(imageView);}}`

Answer 2

Write this in your gradle dependencies

dependencies {
  compile 'com.github.bumptech.glide:glide:3.7.0'
  compile 'com.android.support:support-v4:19.1.0'
}

In your activtiy

Glide.with(activity.this).load(your image url).into(imageView);