Android 中单位换算

dip2px(activity,inputTextE.getTextSize());//传来的dp为: 54.0,转为sp为:  162.00.5
px2sp(activity,inputTextE.getTextSize()); //传来的px为: 54.0,转为sp为:  18.5
px2dip(activity,inputTextE.getTextSize());//传来的px为: 54.0,转为dip为: 18.5
sp2px(activity,inputTextE.getTextSize()); //传来的sp为: 54.0,转为px为:  162.5

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

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

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

public static int px2dip(Context context, float pxValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }