public void setPointerAlpha(int alpha) {
        if (alpha >= 0 && alpha <= 255) {
            mPointerAlpha = alpha;
            mPointerHaloPaint.setAlpha(mPointerAlpha);
            invalidate();
        }
    }
public void setPointerAlpha ( int alpha ) { if ( alpha >= 0 && alpha <= 255 ) { mPointerAlpha = alpha ; mPointerHaloPaint . setAlpha ( mPointerAlpha ) ; invalidate ( ) ; } }
Sets the pointer alpha.

@param alpha the alpha of the pointer