如何使用代码确定设备屏幕大小类别（小，普通，大，xlarge）？

本文翻译自：How to determine device screen size category (small, normal, large, xlarge) using code?

Is there any way to determine the category of screen size of the current device, such as small, normal, large, xlarge? 有没有办法确定当前设备的屏幕尺寸类别，如小，普通，大，xlarge？

Not the density, but the screen size. 不是密度，而是屏幕尺寸。

#1楼

参考：https://stackoom.com/question/L2ec/如何使用代码确定设备屏幕大小类别-小-普通-大-xlarge

#2楼

Thanks for the answers above, that helped me a lot :-) But for those (like me) forced to still support Android 1.5 we can use java reflection for backward compatible: 感谢上面的答案，这对我帮助很大:-)但是对于那些（像我一样）被迫仍支持Android 1.5的人，我们可以使用java反射来向后兼容：

Configuration conf = getResources().getConfiguration();
int screenLayout = 1; // application default behavior
try {Field field = conf.getClass().getDeclaredField("screenLayout");screenLayout = field.getInt(conf);
} catch (Exception e) {// NoSuchFieldException or related stuff
}
// Configuration.SCREENLAYOUT_SIZE_MASK == 15
int screenType = screenLayout & 15;
// Configuration.SCREENLAYOUT_SIZE_SMALL == 1
// Configuration.SCREENLAYOUT_SIZE_NORMAL == 2
// Configuration.SCREENLAYOUT_SIZE_LARGE == 3
// Configuration.SCREENLAYOUT_SIZE_XLARGE == 4
if (screenType == 1) {...
} else if (screenType == 2) {...
} else if (screenType == 3) {...
} else if (screenType == 4) {...
} else { // undefined...
}

#3楼

Jeff Gilfelt's answer as a static helper method: Jeff Gilfelt作为静态辅助方法的答案：

private static String getSizeName(Context context) {int screenLayout = context.getResources().getConfiguration().screenLayout;screenLayout &= Configuration.SCREENLAYOUT_SIZE_MASK;switch (screenLayout) {case Configuration.SCREENLAYOUT_SIZE_SMALL:return "small";case Configuration.SCREENLAYOUT_SIZE_NORMAL:return "normal";case Configuration.SCREENLAYOUT_SIZE_LARGE:return "large";case 4: // Configuration.SCREENLAYOUT_SIZE_XLARGE is API >= 9return "xlarge";default:return "undefined";}
}

#4楼

Couldn't you do this using a string resource and enums? 难道你不能使用字符串资源和枚举吗？ You can define a string resource that had the name of the screen size, such as SMALL, MEDIUM, or LARGE. 您可以定义具有屏幕大小名称的字符串资源，例如SMALL，MEDIUM或LARGE。 Then you could use the value of the string resource to create an instance of the enum. 然后，您可以使用字符串资源的值来创建枚举的实例。

Define an Enum in your code for the different screen sizes you care about. 在代码中为您关注的不同屏幕尺寸定义一个枚举。
```
 public Enum ScreenSize { SMALL, MEDIUM, LARGE,; } 
```
Define a string resource, say screensize, whose value will be either SMALL, MEDIUM, or LARGE. 定义一个字符串资源，比如screensize，其值可以是SMALL，MEDIUM或LARGE。
```
 <string name="screensize">MEDIUM</string> 
```
Put a copy of screensize in a string resource in each dimension you care about. 将screensize的副本放在您关注的每个维度的字符串资源中。
For example, <string name="screensize">MEDIUM</string> would go in values-sw600dp/strings.xml and values-medium/strings.xml and <string name="screensize">LARGE</string> would go in sw720dp/strings.xml and values-large/strings.xml. 例如， <string name="screensize">MEDIUM</string>将输入值-sw600dp / strings.xml和values-medium / strings.xml和<string name="screensize">LARGE</string>在sw720dp / strings.xml和values-large / strings.xml中。
In code, write 在代码中，写
ScreenSize size = ScreenSize.valueOf(getReources().getString(R.string.screensize);

#5楼

private String getDeviceDensity() {int density = mContext.getResources().getDisplayMetrics().densityDpi;switch (density){case DisplayMetrics.DENSITY_MEDIUM:return "MDPI";case DisplayMetrics.DENSITY_HIGH:return "HDPI";case DisplayMetrics.DENSITY_LOW:return "LDPI";case DisplayMetrics.DENSITY_XHIGH:return "XHDPI";case DisplayMetrics.DENSITY_TV:return "TV";case DisplayMetrics.DENSITY_XXHIGH:return "XXHDPI";case DisplayMetrics.DENSITY_XXXHIGH:return "XXXHDPI";default:return "Unknown";}
}

#6楼

Need to check for xlarge screens & x..high densities? 需要检查xlarge屏幕和x..high密度？ This is the altered code from the chosen answer. 这是所选答案的改变代码。

//Determine screen size
if ((getResources().getConfiguration().screenLayout &      Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {     Toast.makeText(this, "Large screen",Toast.LENGTH_LONG).show();
} else if ((getResources().getConfiguration().screenLayout &      Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {     Toast.makeText(this, "Normal sized screen" , Toast.LENGTH_LONG).show();
} else if ((getResources().getConfiguration().screenLayout &      Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {     Toast.makeText(this, "Small sized screen" , Toast.LENGTH_LONG).show();
} else if ((getResources().getConfiguration().screenLayout &      Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {     Toast.makeText(this, "XLarge sized screen" , Toast.LENGTH_LONG).show();
} else {Toast.makeText(this, "Screen size is neither large, normal or small" , Toast.LENGTH_LONG).show();
}//Determine density
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int density = metrics.densityDpi;if (density==DisplayMetrics.DENSITY_HIGH) {Toast.makeText(this, "DENSITY_HIGH... Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_MEDIUM) {Toast.makeText(this, "DENSITY_MEDIUM... Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_LOW) {Toast.makeText(this, "DENSITY_LOW... Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_XHIGH) {Toast.makeText(this, "DENSITY_XHIGH... Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_XXHIGH) {Toast.makeText(this, "DENSITY_XXHIGH... Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_XXXHIGH) {Toast.makeText(this, "DENSITY_XXXHIGH... Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
} else {Toast.makeText(this, "Density is neither HIGH, MEDIUM OR LOW.  Density is " + String.valueOf(density),  Toast.LENGTH_LONG).show();
}

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如何使用代码确定设备屏幕大小类别（小，普通，大，xlarge）？

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如何使用代码确定设备屏幕大小类别（小，普通，大，xlarge）？相关推荐

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