Antworten:
Sie können die Configuration.screenLayout
Bitmaske verwenden.
Beispiel:
if ((getResources().getConfiguration().screenLayout &
Configuration.SCREENLAYOUT_SIZE_MASK) ==
Configuration.SCREENLAYOUT_SIZE_LARGE) {
// on a large screen device ...
}
Der folgende Code konkretisiert die obige Antwort und zeigt die Bildschirmgröße als Toast an.
//Determine screen size
if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
Toast.makeText(this, "Large screen", Toast.LENGTH_LONG).show();
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
Toast.makeText(this, "Normal sized screen", Toast.LENGTH_LONG).show();
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
Toast.makeText(this, "Small sized screen", Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(this, "Screen size is neither large, normal or small", Toast.LENGTH_LONG).show();
}
Dieser Code unten zeigt die Bildschirmdichte als Toast an.
//Determine density
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int density = metrics.densityDpi;
if (density == DisplayMetrics.DENSITY_HIGH) {
Toast.makeText(this, "DENSITY_HIGH... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
}
else if (density == DisplayMetrics.DENSITY_MEDIUM) {
Toast.makeText(this, "DENSITY_MEDIUM... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
}
else if (density == DisplayMetrics.DENSITY_LOW) {
Toast.makeText(this, "DENSITY_LOW... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(this, "Density is neither HIGH, MEDIUM OR LOW. Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
}
Jeff Gilfilts Antwort als statische Hilfsmethode :
private static String getSizeName(Context context) {
int screenLayout = context.getResources().getConfiguration().screenLayout;
screenLayout &= Configuration.SCREENLAYOUT_SIZE_MASK;
switch (screenLayout) {
case Configuration.SCREENLAYOUT_SIZE_SMALL:
return "small";
case Configuration.SCREENLAYOUT_SIZE_NORMAL:
return "normal";
case Configuration.SCREENLAYOUT_SIZE_LARGE:
return "large";
case 4: // Configuration.SCREENLAYOUT_SIZE_XLARGE is API >= 9
return "xlarge";
default:
return "undefined";
}
}
private String getDeviceDensity() {
int density = mContext.getResources().getDisplayMetrics().densityDpi;
switch (density)
{
case DisplayMetrics.DENSITY_MEDIUM:
return "MDPI";
case DisplayMetrics.DENSITY_HIGH:
return "HDPI";
case DisplayMetrics.DENSITY_LOW:
return "LDPI";
case DisplayMetrics.DENSITY_XHIGH:
return "XHDPI";
case DisplayMetrics.DENSITY_TV:
return "TV";
case DisplayMetrics.DENSITY_XXHIGH:
return "XXHDPI";
case DisplayMetrics.DENSITY_XXXHIGH:
return "XXXHDPI";
default:
return "Unknown";
}
}
Vielen Dank für die obigen Antworten, die mir sehr geholfen haben :-) Aber für diejenigen (wie mich), die gezwungen sind, Android 1.5 weiterhin zu unterstützen, können wir Java Reflection für abwärtskompatibel verwenden:
Configuration conf = getResources().getConfiguration();
int screenLayout = 1; // application default behavior
try {
Field field = conf.getClass().getDeclaredField("screenLayout");
screenLayout = field.getInt(conf);
} catch (Exception e) {
// NoSuchFieldException or related stuff
}
// Configuration.SCREENLAYOUT_SIZE_MASK == 15
int screenType = screenLayout & 15;
// Configuration.SCREENLAYOUT_SIZE_SMALL == 1
// Configuration.SCREENLAYOUT_SIZE_NORMAL == 2
// Configuration.SCREENLAYOUT_SIZE_LARGE == 3
// Configuration.SCREENLAYOUT_SIZE_XLARGE == 4
if (screenType == 1) {
...
} else if (screenType == 2) {
...
} else if (screenType == 3) {
...
} else if (screenType == 4) {
...
} else { // undefined
...
}
Configuration
Klasse verweisen . Dies sind statische Endwerte, die beim Kompilieren eingefügt werden (dh sie werden durch ihre tatsächlichen Werte ersetzt), damit Ihr Code auf älteren Versionen der Plattform nicht beschädigt wird.
targetSdkVersion
auf die neueste Version eingestellt.
Wenn Sie die Bildschirmdichte und -größe eines Android-Geräts leicht ermitteln möchten, können Sie diese kostenlose App verwenden (keine Berechtigung erforderlich): https://market.android.com/details?id=com.jotabout.screeninfo
Müssen Sie nach großen Bildschirmen und hohen Dichten suchen? Dies ist der geänderte Code aus der gewählten Antwort.
//Determine screen size
if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
Toast.makeText(this, "Large screen",Toast.LENGTH_LONG).show();
} else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
Toast.makeText(this, "Normal sized screen" , Toast.LENGTH_LONG).show();
} else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
Toast.makeText(this, "Small sized screen" , Toast.LENGTH_LONG).show();
} else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
Toast.makeText(this, "XLarge sized screen" , Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Screen size is neither large, normal or small" , Toast.LENGTH_LONG).show();
}
//Determine density
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int density = metrics.densityDpi;
if (density==DisplayMetrics.DENSITY_HIGH) {
Toast.makeText(this, "DENSITY_HIGH... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_MEDIUM) {
Toast.makeText(this, "DENSITY_MEDIUM... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_LOW) {
Toast.makeText(this, "DENSITY_LOW... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_XHIGH) {
Toast.makeText(this, "DENSITY_XHIGH... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_XXHIGH) {
Toast.makeText(this, "DENSITY_XXHIGH... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
} else if (density==DisplayMetrics.DENSITY_XXXHIGH) {
Toast.makeText(this, "DENSITY_XXXHIGH... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Density is neither HIGH, MEDIUM OR LOW. Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
}
Hier ist eine Xamarin.Android-Version von Tom McFarlins Antwort
//Determine screen size
if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeLarge) {
Toast.MakeText (this, "Large screen", ToastLength.Short).Show ();
} else if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeNormal) {
Toast.MakeText (this, "Normal screen", ToastLength.Short).Show ();
} else if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeSmall) {
Toast.MakeText (this, "Small screen", ToastLength.Short).Show ();
} else if ((Application.Context.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) == ScreenLayout.SizeXlarge) {
Toast.MakeText (this, "XLarge screen", ToastLength.Short).Show ();
} else {
Toast.MakeText (this, "Screen size is neither large, normal or small", ToastLength.Short).Show ();
}
//Determine density
DisplayMetrics metrics = new DisplayMetrics();
WindowManager.DefaultDisplay.GetMetrics (metrics);
var density = metrics.DensityDpi;
if (density == DisplayMetricsDensity.High) {
Toast.MakeText (this, "DENSITY_HIGH... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Medium) {
Toast.MakeText (this, "DENSITY_MEDIUM... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Low) {
Toast.MakeText (this, "DENSITY_LOW... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Xhigh) {
Toast.MakeText (this, "DENSITY_XHIGH... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Xxhigh) {
Toast.MakeText (this, "DENSITY_XXHIGH... Density is " + density, ToastLength.Long).Show ();
} else if (density == DisplayMetricsDensity.Xxxhigh) {
Toast.MakeText (this, "DENSITY_XXXHIGH... Density is " + density, ToastLength.Long).Show ();
} else {
Toast.MakeText (this, "Density is neither HIGH, MEDIUM OR LOW. Density is " + density, ToastLength.Long).Show ();
}
Versuchen Sie diese Funktion isLayoutSizeAtLeast (int screenSize)
Um einen kleinen Bildschirm zu überprüfen, mindestens 320x426 dp und mehr getResources (). GetConfiguration (). IsLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_SMALL);
Um den normalen Bildschirm zu überprüfen, mindestens 320x470 dp und mehr getResources (). GetConfiguration (). IsLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_NORMAL);
Um einen großen Bildschirm zu überprüfen, mindestens 480 x 640 dp und mehr getResources (). GetConfiguration (). IsLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_LARGE);
Um einen besonders großen Bildschirm zu überprüfen, mindestens 720 x 960 dp und mehr getResources (). GetConfiguration (). IsLayoutSizeAtLeast (Configuration.SCREENLAYOUT_SIZE_XLARGE);
Wenn Sie 2018 Jeffs Antwort in Kotlin benötigen, finden Sie sie hier:
private fun determineScreenSize(): String {
// Thanks to https://stackoverflow.com/a/5016350/2563009.
val screenLayout = resources.configuration.screenLayout
return when {
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_SMALL -> "Small"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_NORMAL -> "Normal"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_LARGE -> "Large"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_XLARGE -> "Xlarge"
screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK == Configuration.SCREENLAYOUT_SIZE_UNDEFINED -> "Undefined"
else -> error("Unknown screenLayout: $screenLayout")
}
}
Könnten Sie dies nicht mit einer Zeichenfolgenressource und Aufzählungen tun? Sie können eine Zeichenfolgenressource definieren, die den Namen der Bildschirmgröße hat, z. B. SMALL, MEDIUM oder LARGE. Dann können Sie den Wert der Zeichenfolgenressource verwenden, um eine Instanz der Aufzählung zu erstellen.
Definieren Sie in Ihrem Code eine Aufzählung für die verschiedenen Bildschirmgrößen, die Sie interessieren.
public Enum ScreenSize {
SMALL,
MEDIUM,
LARGE,;
}
Definieren Sie eine Zeichenfolgenressource, z. B. Bildschirmgröße, deren Wert entweder SMALL, MEDIUM oder LARGE ist.
<string name="screensize">MEDIUM</string>
screensize
Sie in jeder Dimension, die Sie interessiert, eine Kopie von in eine Zeichenfolgenressource ein. <string name="screensize">MEDIUM</string>
Gehen Sie zu values-sw600dp / strings.xml und values-medium / strings.xml und <string name="screensize">LARGE</string>
gehen Sie zu sw720dp / strings.xml und values-large / strings.xml.ScreenSize size = ScreenSize.valueOf(getReources().getString(R.string.screensize);
Kopieren Sie diesen Code und fügen Sie ihn in Ihren ein. Activity
Wenn er ausgeführt wird, wird Toast
die Bildschirmgrößenkategorie des Geräts angezeigt.
int screenSize = getResources().getConfiguration().screenLayout &
Configuration.SCREENLAYOUT_SIZE_MASK;
String toastMsg;
switch(screenSize) {
case Configuration.SCREENLAYOUT_SIZE_LARGE:
toastMsg = "Large screen";
break;
case Configuration.SCREENLAYOUT_SIZE_NORMAL:
toastMsg = "Normal screen";
break;
case Configuration.SCREENLAYOUT_SIZE_SMALL:
toastMsg = "Small screen";
break;
default:
toastMsg = "Screen size is neither large, normal or small";
}
Toast.makeText(this, toastMsg, Toast.LENGTH_LONG).show();