尺寸单位转换

//转换dip为px
public static int convertDipOrPx(Context context, int dip) {
float scale = context.getResources().getDisplayMetrics().density;
return (int)(dip*scale + 0.5f*(dip>=0?1:-1));
}

//转换px为dip
public static int convertPxOrDip(Context context, int px) {
float scale = context.getResources().getDisplayMetrics().density;
return (int)(px/scale + 0.5f*(px>=0?1:-1));
}

public static int sp2px(Context context, float spValue) {
float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (spValue * fontScale + 0.5f);
}

public static int px2sp(Context context, float pxValue) {
float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (pxValue / fontScale + 0.5f);
}