How to get specific images Resource from Assets Folder?

Question

I have 8 different plant species images under assets folder, I cached the 8 images assets filename (corresponding to the path, E.g foxtail.png, orchid.png) in the assets directory in a database. (Plus other information)

I'm 'displaying the 8 plants in a RecyclerView. Clicking on any of the plants opens the Detail Activity. (Passing the image filename as saved in the asset folder E.g foxtail.png)

How do i pick the specific image file in the assets folder that matches the file name that was passed to Detail Activity and set it to an ImageView??

Answer 1

You can:

Open the file as a stream

InputStream imageStream = null;
try {
    // get input stream
    imageStream  = getAssets().open("foxtail.png");
    // load image as Drawable
    Drawable drawable= Drawable.createFromStream(imageStream, null);
    // set image to ImageView
    image.setImageDrawable(drawable);
    }
catch(IOException ex) {
    return;
}

Finally remember to close the stream with

if(imageStream !=null){
    imageStream.close();
}

or

moving your images in the res/drawable folder you can load the images with:

String yourImageName = getImageNameFromDB();
int resId= getResources().getIdentifier(yourImageName, "drawable", "com.example.yourpackegename.");
ImageView image = (ImageView)findViewById(R.id.image);
image.setImageDrawable(resId);

or

with something like this (always with the images into res/drawable):

private enum Plant {
    foxtail, orchid, xyz;
}

String value = getPlantFromDB();
Plant plant = Plant.valueOf(value); // surround with try/catch

switch(plant) {
    case foxtail : 
       resId= R.drawable.foxtail
       break;
    case orchid : 
       resId= R.drawable.orchid
       break;
    default : 
       resId= R.drawable.xyz
       break;
Drawable drawable = getResources().getDrawable(resId);
ImageView image = (ImageView)findViewById(R.id.image);
image.setImageDrawable(drawable);