Convert dip to px in Android

Question

I had written method to get the pixels from dip but it is not working. It give me runtime error.

Actually I was running this method in separate class and initialized in my Activity class

Board board = new Board(this); board.execute(URL); 

This code runs asynchronously. Please help me.

public float getpixels(int dp){     //Resources r = boardContext.getResources();     //float px = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpis, r.getDisplayMetrics());              final float scale = this.boardContext.getResources().getDisplayMetrics().density;     int px = (int) (dp * scale + 0.5f);      return px; } 

Answer 1

Try this:

Java

public static float dipToPixels(Context context, float dipValue) {     DisplayMetrics metrics = context.getResources().getDisplayMetrics();     return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dipValue, metrics); } 

Kotlin

fun Context.dipToPixels(dipValue: Float) =     TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dipValue, resources.displayMetrics) 

Answer 2

You can add the dp value in dimen.xml and use

int pixels = getResources().getDimensionPixelSize(R.dimen.idDimension); 

It's easier...