CODEWITHSUNDEEP
javaandroidimageviewresourcesassets
John Smith
John Smith

Reputation: 75

How to get specific images Resource from Assets Folder?

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??

Upvotes: 1

Views: 3864

Answers (3)

Nicola De Fiorenze
Nicola De Fiorenze

Reputation: 2128

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);

Upvotes: 5

Ephraim Kigamba
Ephraim Kigamba

Reputation: 158

Set a tag on each ImageView/View using the Resource Drawable Id eg. R.drawable.foxtail

eg. imageView.setTag(R.drawable.foxtail) OR view.setTag(R.drawable.foxtail)

When one is selected, get the tag and send it to the next activity:

Then check again eg.

imageTag = getIntent().getIntExtra("chosenPlant");

if ( imageTag == R.drawable.foxtail ){
    //Perform action if this pic was selected (foxtail.png)
    newImageView.setImageResource(R.drawable.foxtail);
} else ...

Upvotes: 0

Giacomo Lai
Giacomo Lai

Reputation: 494

You could create an array of int containing the resources ids.

int images[]={
        R.drawable.image_1,
        R.drawable.image_2,
        R.drawable.image_3,
        R.drawable.image_4,
        R.drawable.image_5,
        R.drawable.image_6,
        R.drawable.image_7,
        R.drawable.image_8
 };

In your database store image ids corresponding to the image positions in the resources array.

| id | image_id | information |
-------------------------------
| 0  |   2      |   info_0    |
| 1  |   0      |   info_1    |
| 2  |   4      |   info_2    |

So when you fetch rows from database, you can use image_id to retrieve the corresponding image from the array

ImageView imageView = (ImageView)v.findViewById(R.id.imageView);
imageView.setImageResource(images[image_id]);

Upvotes: 0

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