如何确定设备屏幕大小类别(小，正常，大，xlarge)使用代码?

是否有办法确定当前设备的屏幕大小的类别，如小，正常，大，xlarge?

不是密度，而是屏幕尺寸。

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最佳答案

你可以使用Configuration.screenLayout位掩码。

例子:

if ((getResources().getConfiguration().screenLayout &
Configuration.SCREENLAYOUT_SIZE_MASK) ==
Configuration.SCREENLAYOUT_SIZE_LARGE) {
// on a large screen device ...


}
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下面的代码充实了上面的答案，将屏幕大小显示为Toast。

//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 {
Toast.makeText(this, "Screen size is neither large, normal or small", Toast.LENGTH_LONG).show();
}

下面的代码将屏幕密度显示为Toast。

//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 {
Toast.makeText(this, "Density is neither HIGH, MEDIUM OR LOW.  Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
}
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感谢上面的回答，这对我帮助很大:-)但对于那些(像我一样)被迫仍然支持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
...
}
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杰夫Gilfelt是 answer作为静态帮助方法:

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 >= 9
return "xlarge";
default:
return "undefined";
}
}
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难道不能使用字符串资源和枚举来做到这一点吗?您可以定义一个字符串资源，该资源具有屏幕大小的名称，例如SMALL、MEDIUM或LARGE。然后，您可以使用string资源的值来创建枚举的实例。

  1. 在你的代码中为你所关心的不同屏幕大小定义一个Enum。

    public Enum ScreenSize {
SMALL,
MEDIUM,
LARGE,;
}

  2. Define a string resource, say screensize, whose value will be either SMALL, MEDIUM, or LARGE. 

    <string name="screensize">MEDIUM</string>
  3. Put a copy of screensize in a string resource in each dimension you care about.
    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.
  4. In code, write
    ScreenSize size = ScreenSize.valueOf(getReources().getString(R.string.screensize);
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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";
}
}
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需要检查xlarge屏幕&x . .密度高?这是选择的答案的修改代码。

//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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这是沙玛林。汤姆·麦克法林的回答是的Android版本

        //Determine screen size
if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeLarge) {
Toast.MakeText (this, "Large screen", ToastLength.Short).Show ();
} else if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeNormal) {
Toast.MakeText (this, "Normal screen", ToastLength.Short).Show ();
} else if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeSmall) {
Toast.MakeText (this, "Small screen", ToastLength.Short).Show ();
} else if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeXlarge) {
Toast.MakeText (this, "XLarge screen", ToastLength.Short).Show ();
} else {
Toast.MakeText (this, "Screen size is neither large, normal or small", ToastLength.Short).Show ();
}
//Determine density
DisplayMetrics metrics = new DisplayMetrics();
WindowManager.DefaultDisplay.GetMetrics (metrics);
var density = metrics.DensityDpi;
if (density == DisplayMetricsDensity.High) {
Toast.MakeText (this, "DENSITY_HIGH... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Medium) {
Toast.MakeText (this, "DENSITY_MEDIUM... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Low) {
Toast.MakeText (this, "DENSITY_LOW... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Xhigh) {
Toast.MakeText (this, "DENSITY_XHIGH... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Xxhigh) {
Toast.MakeText (this, "DENSITY_XXHIGH... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Xxxhigh) {
Toast.MakeText (this, "DENSITY_XXXHIGH... Density is " + density, ToastLength.Long).Show ();
} else {
Toast.MakeText (this, "Density is neither HIGH, MEDIUM OR LOW.  Density is " + density, ToastLength.Long).Show ();
}
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试试这个函数< em > isLayoutSizeAtLeast拉(int) < / em >

检查小屏幕，至少320x426 dp以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_SMALL); < / p >

检查正常屏幕，至少320x470 dp及以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_NORMAL); < / p >

检查大屏，至少480x640 dp以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_LARGE); < / p >

检查超大屏幕，至少720x960 dp及以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_XLARGE); < / p >

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在2018年，如果你需要Jeff在Kotlin中的回答，下面是:

  private fun determineScreenSize(): String {
// Thanks to https://stackoverflow.com/a/5016350/2563009.
val screenLayout = resources.configuration.screenLayout
return when {
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_SMALL -> "Small"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_NORMAL -> "Normal"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_LARGE -> "Large"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_XLARGE -> "Xlarge"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_UNDEFINED -> "Undefined"
else -> error("Unknown screenLayout: $screenLayout")
}
}

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