How to load a image from assets?

Question

i need to load a image from assets to avoid a froyo 2.2.2 bug resizing POT images in some particular cases. The way to avoid it is loading the image files from assets dir.

Answer 1

try {
    InputStream istr = this.context.getAssets().open(P.strImage);
    //set drawable from stream
    this.imgProduct.setImageDrawable(Drawable.createFromStream(istr, null));
} catch (IOException e) {
    e.printStackTrace();
}

Answer 2

You can follow my tutorials on displaying data from Assets: https://xjaphx.wordpress.com/2011/10/02/store-and-use-files-in-assets/
The sample with loading image and text to display.

I now added the relevant part of the provided link (in case of earthquake or something) ;-) Taifun

// load image
try {
    // get input stream
    InputStream ims = getAssets().open("avatar.jpg");
    // load image as Drawable
    Drawable d = Drawable.createFromStream(ims, null);
    // set image to ImageView
    mImage.setImageDrawable(d);
}
catch(IOException ex) {
    return;
}

Answer 3

Another version, inside a fragment:

@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{ root = inflater.inflate(R.layout.createrestaurant_layout, container, false);
  Resources res = getResources();
  img = (ImageView) root.findViewById(R.id.img);
  AssetManager amanager = res.getAssets();
  try {
      InputStream imageStream = amanager.open("restaurant.jpg");
      Drawable drawable = new BitmapDrawable(res, imageStream);
      img.setImageDrawable(drawable);
  }  catch (Exception e) { e.printStackTrace(); }
} 

This process seems much simpler in iOS/UIKit or iOS/SwiftUI.

Answer 4

    protected String openImageInAssets(String imageName){
        String encodedImageBase64 = "";
        AssetManager assetManager = getAssets();
        InputStream fileStream = null;
        try {
            fileStream = assetManager.open(imageName);
            if(fileStream != null){
                //                  BitmapFactory.Options bfo = new BitmapFactory.Options();
                //                  bfo.inPreferredConfig = Bitmap.Config.ARGB_8888;
                //                  Bitmap bitmap = BitmapFactory.decodeStream(fileStream, null, bfo);

                Bitmap bitmap = BitmapFactory.decodeStream(fileStream);
                // Convert bitmap to Base64 encoded image for web
                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

                // to get image extension file name split the received
                int fileExtensionPosition = imageName.lastIndexOf('.');
                String fileExtension = imageName.substring(fileExtensionPosition+1);
                //                  Log.d(IConstants.TAG,"fileExtension: " + fileExtension);

                if(fileExtension.equalsIgnoreCase("png")){
                    bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
                    //                      Log.d(IConstants.TAG,"fileExtension is PNG");
                }else if(fileExtension.equalsIgnoreCase("jpg") || fileExtension.equalsIgnoreCase("jpeg")){
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
                    //                      Log.d(TAG,"fileExtension is JPG");
                }

                byte[] byteArray = byteArrayOutputStream.toByteArray();
                String imgageBase64 = Base64.encodeToString(byteArray, Base64.DEFAULT);
                encodedImageBase64 = "data:image/png;base64," + imgageBase64;
            }
        } catch (IOException e) {
            e.printStackTrace();
            return encodedImageBase64="";
        }
        finally {
            //Always clear and close
            try {
                if(fileStream != null) {
                    fileStream.close();
                    fileStream = null;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

//      Log.d(TAG,"encodedImageBase64: " + encodedImageBase64);
        return encodedImageBase64;
    }

Answer 5

Instead of using the assets dir, put the file into /res/raw, and you can then access it using the following URI: android.resource://com.your.packagename/" + R.raw.radiocd5

Answer 6

Here is an alternative way

setImageBitmap(BitmapFactory.decodeStream(assets.open("photo.jpg")))