试试这个:

DisplayMetrics dm = context.getResources().getDisplayMetrics();
int densityDpi = dm.densityDpi;

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);

switch(metrics.densityDpi) {
     case DisplayMetrics.DENSITY_LOW:
         break;

     case DisplayMetrics.DENSITY_MEDIUM:
         break;

     case DisplayMetrics.DENSITY_HIGH:
         break;
}

这将在API级别4和更高的级别上工作。

试试这个:

DisplayMetrics dm = context.getResources().getDisplayMetrics();
int densityDpi = dm.densityDpi;

我使用以下代码从模块访问DPI(不需要访问上下文对象):

(Resources.getSystem().getDisplayMetrics().xdpi
Resources.getSystem().getDisplayMetrics().ydpi)/2

试试这个…

在kotlin

fun determineScreenDensityCode(): String {
      return when (resources.displayMetrics.densityDpi) {
         DisplayMetrics.DENSITY_LOW -> "ldpi"
         DisplayMetrics.DENSITY_MEDIUM -> "mdpi"
         DisplayMetrics.DENSITY_HIGH -> "hdpi"
         DisplayMetrics.DENSITY_XHIGH, DisplayMetrics.DENSITY_280 -> "xhdpi"
         DisplayMetrics.DENSITY_XXHIGH, DisplayMetrics.DENSITY_360, DisplayMetrics.DENSITY_400, DisplayMetrics.DENSITY_420 -> "xxhdpi"
         DisplayMetrics.DENSITY_XXXHIGH, DisplayMetrics.DENSITY_560 -> "xxxhdpi"
         else -> "Unknown code ${resources.displayMetrics.densityDpi}"
     }
}

你可以通过println("density: ${determineScreenDensityCode()}")调用 输出为System。输出:密度:xxxhdpi

你应该试试这个。刚刚添加了一个方法，它将找到并显示吐司。设备属于哪个类别。

public static int differentDensityAndScreenSize(Context context) {
  int value = 20;
  String str = "";
  if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
   switch (context.getResources().getDisplayMetrics().densityDpi) {
   case DisplayMetrics.DENSITY_LOW:
    str = "small-ldpi";
    value = 20;
    break;
   case DisplayMetrics.DENSITY_MEDIUM:
    str = "small-mdpi";
    value = 20;
    break;
   case DisplayMetrics.DENSITY_HIGH:
    str = "small-hdpi";
    value = 20;
    break;
   case DisplayMetrics.DENSITY_XHIGH:
    str = "small-xhdpi";
    value = 20;
    break;
   case DisplayMetrics.DENSITY_XXHIGH:
    str = "small-xxhdpi";
    value = 20;
    break;
   case DisplayMetrics.DENSITY_XXXHIGH:
    str = "small-xxxhdpi";
    value = 20;
    break;
   case DisplayMetrics.DENSITY_TV:
    str = "small-tvdpi";
    value = 20;
    break;
   default:
    str = "small-unknown";
    value = 20;
    break;
   }

  } else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
   switch (context.getResources().getDisplayMetrics().densityDpi) {
   case DisplayMetrics.DENSITY_LOW:
    str = "normal-ldpi";
    value = 82;
    break;
   case DisplayMetrics.DENSITY_MEDIUM:
    str = "normal-mdpi";
    value = 82;
    break;
   case DisplayMetrics.DENSITY_HIGH:
    str = "normal-hdpi";
    value = 82;
    break;
   case DisplayMetrics.DENSITY_XHIGH:
    str = "normal-xhdpi";
    value = 90;
    break;
   case DisplayMetrics.DENSITY_XXHIGH:
    str = "normal-xxhdpi";
    value = 96;
    break;
   case DisplayMetrics.DENSITY_XXXHIGH:
    str = "normal-xxxhdpi";
    value = 96;
    break;
   case DisplayMetrics.DENSITY_TV:
    str = "normal-tvdpi";
    value = 96;
    break;
   default:
    str = "normal-unknown";
    value = 82;
    break;
   }
  } else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
   switch (context.getResources().getDisplayMetrics().densityDpi) {
   case DisplayMetrics.DENSITY_LOW:
    str = "large-ldpi";
    value = 78;
    break;
   case DisplayMetrics.DENSITY_MEDIUM:
    str = "large-mdpi";
    value = 78;
    break;
   case DisplayMetrics.DENSITY_HIGH:
    str = "large-hdpi";
    value = 78;
    break;
   case DisplayMetrics.DENSITY_XHIGH:
    str = "large-xhdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_XXHIGH:
    str = "large-xxhdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_XXXHIGH:
    str = "large-xxxhdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_TV:
    str = "large-tvdpi";
    value = 125;
    break;
   default:
    str = "large-unknown";
    value = 78;
    break;
   }

  } else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
   switch (context.getResources().getDisplayMetrics().densityDpi) {
   case DisplayMetrics.DENSITY_LOW:
    str = "xlarge-ldpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_MEDIUM:
    str = "xlarge-mdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_HIGH:
    str = "xlarge-hdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_XHIGH:
    str = "xlarge-xhdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_XXHIGH:
    str = "xlarge-xxhdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_XXXHIGH:
    str = "xlarge-xxxhdpi";
    value = 125;
    break;
   case DisplayMetrics.DENSITY_TV:
    str = "xlarge-tvdpi";
    value = 125;
    break;
   default:
    str = "xlarge-unknown";
    value = 125;
    break;
   }
  }
// The Toast will show the Device falls in Which Categories.
Toast.makeText(MainActivity.this, ""+str, Toast.LENGTH_SHORT).show();

  return value;
 }

http://www.androidwarriors.com/2016/01/how-to-find-different-devices-screen.html