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。


当前回答

试试这个函数isLayoutSizeAtLeast(int screenSize)

检查小屏幕,至少320x426 dp及以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_SMALL);

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

检查大屏幕,至少480x640 dp及以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_LARGE);

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

其他回答

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")
    }
  }

您可以使用配置。screenLayout位掩码。

例子:

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

}

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();
}

试试这个函数isLayoutSizeAtLeast(int screenSize)

检查小屏幕,至少320x426 dp及以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_SMALL);

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

检查大屏幕,至少480x640 dp及以上 .getConfiguration getresource () () .isLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_LARGE);

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

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
    ...
}