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
下面的答案是基于qwertzguy的答案的一个小改进。
double density = getResources().getDisplayMetrics().density;
if (density >= 4.0) {
//"xxxhdpi";
}
else if (density >= 3.0 && density < 4.0) {
//xxhdpi
}
else if (density >= 2.0) {
//xhdpi
}
else if (density >= 1.5 && density < 2.0) {
//hdpi
}
else if (density >= 1.0 && density < 1.5) {
//mdpi
}
其他回答
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;
}
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。
得到dpi:
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
// will either be DENSITY_LOW, DENSITY_MEDIUM or DENSITY_HIGH
int dpiClassification = dm.densityDpi;
// these will return the actual dpi horizontally and vertically
float xDpi = dm.xdpi;
float yDpi = dm.ydpi;