计算的android屏幕尺寸？ [英] Calculating android screen size?

问题描述

是否有可能来计算英寸Android的屏幕对角线尺寸。

Is it possible to calculate the android screen diagonal dimension in inches.

我曾尝试以下两种方法无论是不适合我的情况。

I have tried below two approaches both is not suitable for my case.

方法一：

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int absoluteHeightInPx = displayMetrics.heightPixels;
int absoluteWidthInPx = displayMetrics.widthPixels;     
double diagonalPixels = Math.sqrt((absoluteHeightInPx * absoluteHeightInPx) + (absoluteWidthInPx * absoluteWidthInPx));
double diagonalInInches = diagonalPixels / displayMetrics.densityDpi;

方法2：

float actualHeight = absoluteHeightInPx * deviceDensity;
float actualWidth = absoluteWidthInPx * deviceDensity;
float deviceDensity = displayMetrics.density;
float physicalPixelPerInchX = displayMetrics.xdpi;
float physicalPixelPerInchY = displayMetrics.ydpi;
float heightInInches = actualHeight / physicalPixelPerInchY;
float widhtInInches = actualWidth / physicalPixelPerInchX;
double diagonalInInches = Math.sqrt((heightInInches * heightInInches) + (widhtInInches * widhtInInches));

你能不能改正，如果我错了。

Could you correct if i am wrong.

谢谢， Easwar

Thanks, Easwar

推荐答案

我在8 Android设备测试，我的两个方法。第二个是几乎准确。

I have tested both of my approach in 8 android devices. The second is almost accurate.

但对于一些设备，这是不给予适当的回答。所以，我的结论如下第二种方法。

But for few devices this is not giving proper answer. So I concluded following the second approach.

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