set image drawable programmatically android code example

Example 1: how to set drawable name to imageview programmatically

String uri = "@drawable/myresource";  // where myresource (without the extension) is the file

int imageResource = getResources().getIdentifier(uri, null, getPackageName());

imageview= (ImageView)findViewById(R.id.imageView);
Drawable res = getResources().getDrawable(imageResource);
imageView.setImageDrawable(res);

Example 2: set imageview BackgroundResource programmatically android

qImageView.setBackgroundResource(R.drawable.thumbs_down);