工具类 -- 资源检测 单位转换

public class UnitUtil {
    public static int getScreenWidthPixels(Context context) {
        return context.getResources().getDisplayMetrics().widthPixels;
    }

    public static int getScreenHeightPixels(Context context) {
        return context.getResources().getDisplayMetrics().heightPixels;
    }

    public static float getScreenDensity(Context context) {
        return context.getResources().getDisplayMetrics().density;
    }

    public static float getScreenScaledDensity(Context context) {
        return context.getResources().getDisplayMetrics().scaledDensity;
    }

    public static int px2dp(Context context, float pxValue) {
        float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }

    public static int dp2px(Context context, float dpValue) {
        float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 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 sp2px(Context context, float spValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue * fontScale + 0.5f);
    }
}