Reading images from asset and fill in the array

Question

I have a gallery I have some pictures in my gallery that there are in the drawable. like this first I put the into in Integer Array like this.

Integer stickers_big[] = { R.drawable.stck1, R.drawable.stck2,...}

and this my adapter :

    class stickersAdapter extends BaseAdapter {
    Context ctx;

    public stickersAdapter(FirstActivity act) {
        // TODO Auto-generated constructor stub
        this.ctx = act;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return stickers_drawable.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ImageView imageview = new ImageView(ctx);
        imageview.setImageResource(stickers_drawable[position].intValue());
        imageview.setScaleType(android.widget.ImageView.ScaleType.FIT_XY);

        return imageview;
    }

}

Now I want to put my images into assets . I do like this , I read my image name and then set it into my imagview. but I JUST read one image name. I dont know how to read the name of all my images and open them.

 public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ImageView imageview = new ImageView(ctx);
        AssetManager assetManager = getAssets();
        try {
            // get input stream
            InputStream ims = assetManager.open("stck1.png");

            // create drawable from stream
            Drawable d = Drawable.createFromStream(ims, null);

            // set the drawable to imageview
            imageview.setImageDrawable(d);
        }
        catch(IOException ex) {

        }


        return imageview;
    }

}

How to read ALL of my images then open them?

IntelliJ Amiya · Answer 1 · 2017-04-18T07:22:33.120

1

Now I want to put my images into assets .

At first keep your images into image folder and then use this way

 int imageResource = ctx.getResources().getIdentifier("@drawable/stck1".replace(".jpg", ""), null,ctx.getPackageName());
 imageview.setImageResource(imageResource);

edited Apr 18 '17 at 07:22

answered Apr 18 '17 at 07:17

IntelliJ Amiya

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I want to put them in asset not drwable, I say it in my question – nsr Apr 18 '17 at 07:20
http://stackoverflow.com/questions/7645268/how-to-load-a-image-from-assets – IntelliJ Amiya Apr 18 '17 at 07:21
@nsr please check above two links .hope this helps – IntelliJ Amiya Apr 18 '17 at 07:31

score 1 · Accepted Answer · answered Apr 18 '17 at 07:30

1

create sub-folder in assets directory. use getAssets().list() for getting all file names from assets:

 String[] images =getAssets().list("images");
ArrayList<String> listImages = new ArrayList<String>(Arrays.asList(images));

Now to set image in imageview you first need to get bitmap using image name from assets :

InputStream inputstream=mContext.getAssets().open("images/"
                                      +listImages.get(position));
Drawable drawable = Drawable.createFromStream(inputstream, null);
imageView.setImageDrawable(drawable);

answered Apr 18 '17 at 07:30

Sandeep dhiman

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i have error in this line String[] images =getAssets().list("images"); – nsr Apr 18 '17 at 07:34
I put it in try and catch , and run it , but nothing show , my images dont show – nsr Apr 18 '17 at 07:40
Thank you , i find the way – nsr Apr 18 '17 at 08:13

Junaid Hafeez · Answer 3 · 2017-04-18T07:49:21.660

0

Say you have this hierarchy in your assets folder

assets
 |__img1
 |__img2
 |__img3

you can get them like this

try {  
    String[] list = getAssets().list("");

    for(String img: list ){
        //do your stuff here
       }
    } catch (IOException e) {
             e.printStackTrace();
     }

if you have sub-folder in assets, put its name in list("sub_folder");

You can get this list in your activity, if you are in fragment you will have to do getActivity()getAssets().list("");. Once you have list of your images name, you may pass it to you adapter and can use it in your getView() method w.r.t position.

edited Apr 18 '17 at 07:49

answered Apr 18 '17 at 07:24

Junaid Hafeez

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where you want to get all the names which you have put in your assets. `list` will have all those names and you can loop them to get every single name. – Junaid Hafeez Apr 18 '17 at 07:30
Would you please take a look at Sandeep dhiman answer , Now in this way I can get image names easliy but my gallery dont show my picture – nsr Apr 18 '17 at 07:54

Reading images from asset and fill in the array

3 Answers3