如何获得屏幕密度编程在android?
我的意思是:如何找到当前设备的屏幕dpi ?
当前回答
在Android中，你可以得到这样的屏幕密度:
public static String getScreenDensity(Context context)
{
String density;
switch (context.getResources().getDisplayMetrics().densityDpi)
{
case DisplayMetrics.DENSITY_LOW:
density = "LDPI";
break;
case DisplayMetrics.DENSITY_140:
density = "LDPI - MDPI";
break;
case DisplayMetrics.DENSITY_MEDIUM:
density = "MDPI";
break;
case DisplayMetrics.DENSITY_180:
case DisplayMetrics.DENSITY_200:
case DisplayMetrics.DENSITY_220:
density = "MDPI - HDPI";
break;
case DisplayMetrics.DENSITY_HIGH:
density = "HDPI";
break;
case DisplayMetrics.DENSITY_260:
case DisplayMetrics.DENSITY_280:
case DisplayMetrics.DENSITY_300:
density = "HDPI - XHDPI";
break;
case DisplayMetrics.DENSITY_XHIGH:
density = "XHDPI";
break;
case DisplayMetrics.DENSITY_340:
case DisplayMetrics.DENSITY_360:
case DisplayMetrics.DENSITY_400:
case DisplayMetrics.DENSITY_420:
case DisplayMetrics.DENSITY_440:
density = "XHDPI - XXHDPI";
break;
case DisplayMetrics.DENSITY_XXHIGH:
density = "XXHDPI";
break;
case DisplayMetrics.DENSITY_560:
case DisplayMetrics.DENSITY_600:
density = "XXHDPI - XXXHDPI";
break;
case DisplayMetrics.DENSITY_XXXHIGH:
density = "XXXHDPI";
break;
case DisplayMetrics.DENSITY_TV:
density = "TVDPI";
break;
default:
density = "UNKNOWN";
break;
}
return density;
}
在Kotlin中是这样的:
fun getScreenDensity(context: Context): String {
val density: String
when (context.resources.displayMetrics.densityDpi) {
DisplayMetrics.DENSITY_LOW -> density = "LDPI"
DisplayMetrics.DENSITY_140 -> density = "LDPI - MDPI"
DisplayMetrics.DENSITY_MEDIUM -> density = "MDPI"
DisplayMetrics.DENSITY_180, DisplayMetrics.DENSITY_200, DisplayMetrics.DENSITY_220 -> density = "MDPI - HDPI"
DisplayMetrics.DENSITY_HIGH -> density = "HDPI"
DisplayMetrics.DENSITY_260, DisplayMetrics.DENSITY_280, DisplayMetrics.DENSITY_300 -> density = "HDPI - XHDPI"
DisplayMetrics.DENSITY_XHIGH -> density = "XHDPI"
DisplayMetrics.DENSITY_340, DisplayMetrics.DENSITY_360, DisplayMetrics.DENSITY_400, DisplayMetrics.DENSITY_420, DisplayMetrics.DENSITY_440 -> density =
"XHDPI - XXHDPI"
DisplayMetrics.DENSITY_XXHIGH -> density = "XXHDPI"
DisplayMetrics.DENSITY_560, DisplayMetrics.DENSITY_600 -> density = "XXHDPI - XXXHDPI"
DisplayMetrics.DENSITY_XXXHIGH -> density = "XXXHDPI"
DisplayMetrics.DENSITY_TV -> density = "TVDPI"
else -> density = "UNKNOWN"
}
return density
}
确保定期检查是否增加了新的密度。
其他回答
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
如果你想从服务中检索密度，它是这样工作的:
WindowManager wm = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics metrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(metrics);
在Android中，你可以得到这样的屏幕密度:
public static String getScreenDensity(Context context)
{
String density;
switch (context.getResources().getDisplayMetrics().densityDpi)
{
case DisplayMetrics.DENSITY_LOW:
density = "LDPI";
break;
case DisplayMetrics.DENSITY_140:
density = "LDPI - MDPI";
break;
case DisplayMetrics.DENSITY_MEDIUM:
density = "MDPI";
break;
case DisplayMetrics.DENSITY_180:
case DisplayMetrics.DENSITY_200:
case DisplayMetrics.DENSITY_220:
density = "MDPI - HDPI";
break;
case DisplayMetrics.DENSITY_HIGH:
density = "HDPI";
break;
case DisplayMetrics.DENSITY_260:
case DisplayMetrics.DENSITY_280:
case DisplayMetrics.DENSITY_300:
density = "HDPI - XHDPI";
break;
case DisplayMetrics.DENSITY_XHIGH:
density = "XHDPI";
break;
case DisplayMetrics.DENSITY_340:
case DisplayMetrics.DENSITY_360:
case DisplayMetrics.DENSITY_400:
case DisplayMetrics.DENSITY_420:
case DisplayMetrics.DENSITY_440:
density = "XHDPI - XXHDPI";
break;
case DisplayMetrics.DENSITY_XXHIGH:
density = "XXHDPI";
break;
case DisplayMetrics.DENSITY_560:
case DisplayMetrics.DENSITY_600:
density = "XXHDPI - XXXHDPI";
break;
case DisplayMetrics.DENSITY_XXXHIGH:
density = "XXXHDPI";
break;
case DisplayMetrics.DENSITY_TV:
density = "TVDPI";
break;
default:
density = "UNKNOWN";
break;
}
return density;
}
在Kotlin中是这样的:
fun getScreenDensity(context: Context): String {
val density: String
when (context.resources.displayMetrics.densityDpi) {
DisplayMetrics.DENSITY_LOW -> density = "LDPI"
DisplayMetrics.DENSITY_140 -> density = "LDPI - MDPI"
DisplayMetrics.DENSITY_MEDIUM -> density = "MDPI"
DisplayMetrics.DENSITY_180, DisplayMetrics.DENSITY_200, DisplayMetrics.DENSITY_220 -> density = "MDPI - HDPI"
DisplayMetrics.DENSITY_HIGH -> density = "HDPI"
DisplayMetrics.DENSITY_260, DisplayMetrics.DENSITY_280, DisplayMetrics.DENSITY_300 -> density = "HDPI - XHDPI"
DisplayMetrics.DENSITY_XHIGH -> density = "XHDPI"
DisplayMetrics.DENSITY_340, DisplayMetrics.DENSITY_360, DisplayMetrics.DENSITY_400, DisplayMetrics.DENSITY_420, DisplayMetrics.DENSITY_440 -> density =
"XHDPI - XXHDPI"
DisplayMetrics.DENSITY_XXHIGH -> density = "XXHDPI"
DisplayMetrics.DENSITY_560, DisplayMetrics.DENSITY_600 -> density = "XXHDPI - XXXHDPI"
DisplayMetrics.DENSITY_XXXHIGH -> density = "XXXHDPI"
DisplayMetrics.DENSITY_TV -> density = "TVDPI"
else -> density = "UNKNOWN"
}
return density
}
确保定期检查是否增加了新的密度。
科特林
LocalContext.current.resources.displayMetrics.density
得到密度乘数。
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
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