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 ?
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
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
这也是可行的:
getResources().getDisplayMetrics().density;
这将给你:
0.75 ldpi
1.0米
1.5 hdpi
2.0 - xhdpi
3.0 - xxhdpi
4.0 - xxxhdpi
裁判:密度
ref 2
public static String getDensity(Context context) {
String r;
DisplayMetrics metrics = new DisplayMetrics();
if (!(context instanceof Activity)) {
r = "hdpi";
} else {
Activity activity = (Activity) context;
activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
if (metrics.densityDpi <= DisplayMetrics.DENSITY_LOW) {
r = "ldpi";
} else if (metrics.densityDpi <= DisplayMetrics.DENSITY_MEDIUM) {
r = "mdpi";
} else {
r = "hdpi";
}
}
return r;
}
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
以下是一些密度常数,来源:
除了标准密度之外,还有5种中间密度。考虑到这一点,下面的代码将是一个完整的工作示例:
float density = getResources().getDisplayMetrics().density;
if (density == 0.75f)
{
// LDPI
}
else if (density >= 1.0f && density < 1.5f)
{
// MDPI
}
else if (density == 1.5f)
{
// HDPI
}
else if (density > 1.5f && density <= 2.0f)
{
// XHDPI
}
else if (density > 2.0f && density <= 3.0f)
{
// XXHDPI
}
else
{
// XXXHDPI
}
或者,你可以使用densityDpi找到密度常数:
int densityDpi = getResources().getDisplayMetrics().densityDpi;
switch (densityDpi)
{
case DisplayMetrics.DENSITY_LOW:
// LDPI
break;
case DisplayMetrics.DENSITY_MEDIUM:
// MDPI
break;
case DisplayMetrics.DENSITY_TV:
case DisplayMetrics.DENSITY_HIGH:
// HDPI
break;
case DisplayMetrics.DENSITY_XHIGH:
case DisplayMetrics.DENSITY_280:
// XHDPI
break;
case DisplayMetrics.DENSITY_XXHIGH:
case DisplayMetrics.DENSITY_360:
case DisplayMetrics.DENSITY_400:
case DisplayMetrics.DENSITY_420:
// XXHDPI
break;
case DisplayMetrics.DENSITY_XXXHIGH:
case DisplayMetrics.DENSITY_560:
// XXXHDPI
break;
}