（原创）分享自己写的几个工具类（八）dip和px互相转换

根据屏幕密度进行二者的转换

    /**
    * px转换dip
    */
    public static int px2dip(Context context, int px) {
        if (px <= 0 || context == null) {
            return 0;
        }
        final float scale = getScreenDensity(context);
        return (int) (px / scale + 0.5f);
    }

   

    /**
    *dip转换px
    */
    public static float dp2px(Context context, int dp) {
        if (dp <= 0 || context == null) {
            return 0;
        }
        float result = 0f;
        result = (int) (getScreenDensity(context) * dp + 0.5);
        return result;
    }

    /**
     * px转换dip 多个数据
     */
    public static int[] px2dipList(Context context, int[] pxList) {
        final float scale = getScreenDensity(context);
        for (int i = 0; i < pxList.length; i++) {
            if (pxList[i] <= 0 || context == null) {
                pxList[i] = 0;
            } else {
                pxList[i] = (int) (pxList[i] / scale + 0.5f);
            }
        }
        return pxList;
    }

    /**
     * dip转换px  多个数据
     */
    public static float[] dp2pxList(Context context, float[] dpList) {
        final float scale = getScreenDensity(context);
        for (int i = 0; i < dpList.length; i++) {
            if (dpList[i] <= 0 || context == null) {
                dpList[i] = 0f;
            } else {
                float result = 0f;
                result = (int) (scale * dpList[i] + 0.5);
                dpList[i] = result;
            }
        }
        return dpList;
    }

    /**
     * 获取屏幕密度
     *
     * @param context
     * @return
     */
    public static float getScreenDensity(Context context) {
        if (context == null) {
            return 0.0f;
        }
        DisplayMetrics dm = new DisplayMetrics();
        dm = context.getResources().getDisplayMetrics();
        return dm.density;
    }