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
Blundell的回答是静态帮助方法:
private static String getDensityName(Context context) {
float density = context.getResources().getDisplayMetrics().density;
if (density >= 4.0) {
return "xxxhdpi";
}
if (density >= 3.0) {
return "xxhdpi";
}
if (density >= 2.0) {
return "xhdpi";
}
if (density >= 1.5) {
return "hdpi";
}
if (density >= 1.0) {
return "mdpi";
}
return "ldpi";
}
其他回答
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
}
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。
另一个答案是:
/**
* @return "ldpi", "mdpi", "hdpi", "xhdpi", "xhdpi", "xxhdpi", "xxxhdpi", "tvdpi", or "unknown".
*/
public static String getDensityBucket(Resources resources) {
switch (resources.getDisplayMetrics().densityDpi) {
case DisplayMetrics.DENSITY_LOW:
return "ldpi";
case DisplayMetrics.DENSITY_MEDIUM:
return "mdpi";
case DisplayMetrics.DENSITY_HIGH:
return "hdpi";
case DisplayMetrics.DENSITY_XHIGH:
return "xhdpi";
case DisplayMetrics.DENSITY_XXHIGH:
return "xxhdpi";
case DisplayMetrics.DENSITY_XXXHIGH:
return "xxxhdpi";
case DisplayMetrics.DENSITY_TV:
return "tvdpi";
default:
return "unknown";
}
}
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。
另一种获得设备加载密度的方法:
为每个密度创建值文件夹
值(默认mdpi) values-hdpi values-xhdpi values-xxhdpi values-xxxhdpi
在它们各自的strings.xml中添加一个字符串资源:
<string name="screen_density">MDPI</string> <!-- ..\res\values\strings.xml -->
<string name="screen_density">HDPI</string> <!-- ..\res\values-hdpi\strings.xml -->
<string name="screen_density">XHDPI</string> <!-- ..\res\values-xhdpi\strings.xml -->
<string name="screen_density">XXHDPI</string> <!-- ..\res\values-xxhdpi\strings.xml -->
<string name="screen_density">XXXHDPI</string> <!-- ..\res\values-xxxhdpi\strings.xml -->
然后简单地获取字符串资源,你就有了密度:
String screenDensity = getResources().getString(R.string.screen_density);
如果密度大于XXXHDPI,它将默认为XXXHDPI,如果密度低于HDPI,它将默认为MDPI
我省略了LDPI,因为对于我的用例来说它是不必要的。