android px、sp、dp之间的互转

public static int px2sp(Context context, float pxValue) {

final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;

return (int) (pxValue / fontScale + 0.5f);

}

public static int sp2px(Context context, float spValue) {

final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;

return (int) (spValue * fontScale + 0.5f);

}

public static int dip2px(Context context, float dipValue) {

final float scale = context.getResources().getDisplayMetrics().density;

return (int) (dipValue * scale + 0.5f);

}

public static int px2dip(Context context, float pxValue) {

final float scale = context.getResources().getDisplayMetrics().density;

return (int) (pxValue / scale + 0.5f);

}