CODEWITHSUNDEEP
javaandroid
Badr Hari
Badr Hari

Reputation: 8384

setImageResource from a string

I would like to change the imageview src based on my string, I have something like this:

ImageView imageView1 = (ImageView)findViewById(R.id.imageView1);

String correctAnswer = "poland";
String whatEver = R.drawable+correctAnswer;
imageView1.setImageResource(whatEver);

Of course it doesnt work. How can I change the image programmatically?

Upvotes: 23

Views: 23101

Answers (2)

james
james

Reputation: 26271

public static int getImageId(Context context, String imageName) {
    return context.getResources().getIdentifier("drawable/" + imageName, null, context.getPackageName());
}

use: imageView1.setImageResource(getImageId(this, correctAnswer);

Note: leave off the extension (eg, ".jpg").

Example: image is "abcd_36.jpg"

Context c = getApplicationContext();
int id = c.getResources().getIdentifier("drawable/"+"abcd_36", null, c.getPackageName());
((ImageView)v.findViewById(R.id.your_image_on_your_layout)).setImageResource(id);

Upvotes: 39

Noah
Noah

Reputation: 1966

I don't know if this is what you had in mind at all, but you could set up a HashMap of image id's (which are ints) and Strings of correct answers.

    HashMap<String, Integer> images = new HashMap<String, Integer>();
    images.put( "poland", Integer.valueOf( R.drawable.poland ) );
    images.put( "germany", Integer.valueOf( R.drawable.germany ) );

    String correctAnswer = "poland";
    imageView1.setImageResource( images.get( correctAnswer ).intValue() );

Upvotes: 6

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