Set ImageView Size Programmatically in DP Java [duplicate]

Answer 1

You need to convert your value to dps, you can use the following function to do so:

public static int dpToPx(int dp, Context context) {
    float density = context.getResources().getDisplayMetrics().density;
    return Math.round((float) dp * density);
}

Then, to set the ImageView size to the px value, you can do this:

LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)imageView.getLayoutParams();
params.width = dpToPx(45);
params.height = dpToPx(45);
imageView.setLayoutParams(params);

(Change LinearLayout for whatever container your ImageView is in)

Edit: Kotlin Version

The function to convert to Px can be written like this in kotlin (as an extension)

fun Int.toPx(context: Context) = this * context.resources.displayMetrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT

Then can use it like this:

view.updateLayoutParams {
    width = 200.toPx(context)
    height = 100.toPx(context)
}