How to create a Drawable from a stream without resizing it?

Question

If I have the minimum target SDK for my app set to 4 then all calls to Drawable.createFromStream resize images.

e.g. if the source image is 480px wide and the Androi

Answer 1

Loading images from local resource in ImageView Adapter

I was stuck with OOM error in ion by Koushik Dutta, for as low as 2 images, loading from the resource folder. Even he mentioned it may happen since they are not streams of data. and suggested to load them as InputStream.

I chucked ion Library since i wanted just 4 images from the local.

here is the solution with simple ImageView.

inside the RecyclerViewAdapter/ or any where

 InputStream inputStream = mContext.getResources().openRawResource(R.drawable.your_id);

    Bitmap b = BitmapFactory.decodeStream(inputStream);
    b.setDensity(Bitmap.DENSITY_NONE);
    Drawable d = new BitmapDrawable(b);
    holder.mImageView.setImageDrawable(d);

Although Drawable d = new BitmapDrawable(b); is deprecated but, does the job quite well.

so instead we can directly get drawable from InputStream just by this line..

Drawable d = Drawable.createFromStream(inputStream,"src");

Hope it helps.

Answer 2

You can load image as Bitmap. This way its size will be unchanged.

BitmapFactory.decodeStream(...)

Or you can try BitmapDrawable(InputStream is) constructor. It is deprecated but I guess it should do the job.

Answer 3

After a long time, I came across the following solution. It works. It retrieves creates bitmap from file at locallink.

private Drawable getDrawableForStore(String localLink) {
    Bitmap thumbnail = null;
    try {
        File filePath = this.getFileStreamPath(localLink);
        FileInputStream fi = new FileInputStream(filePath);
        thumbnail = BitmapFactory.decodeStream(fi);
    } catch (Exception ex) {
        Log.e("getThumbnail() on internal storage", ex.getMessage());
        return null;
    }

    DisplayMetrics metrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    float scaledDensity = metrics.density;
    int width = thumbnail.getWidth();
    int height = thumbnail.getHeight();

    if(scaledDensity<1){

        width = (int) (width *scaledDensity);
        height = (int) (height *scaledDensity);
    }else{
        width = (int) (width +width *(scaledDensity-1));
        height = (int) (height +height *(scaledDensity-1));
    }

    thumbnail = Bitmap.createScaledBitmap(thumbnail, width, height, true);
    Drawable d = new BitmapDrawable(getResources(),thumbnail);

    return d;

}