如何获取屏幕宽度和高度并将此值用于:
@Override protected void onMeasure(int widthSpecId, int heightSpecId) {
Log.e(TAG, "onMeasure" + widthSpecId);
setMeasuredDimension(SCREEN_WIDTH, SCREEN_HEIGHT -
game.findViewById(R.id.flag).getHeight());
}
使用此代码,您可以获得运行时显示的宽度和高度:
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;
在视图中,您需要执行以下操作:
((Activity) getContext()).getWindowManager()
.getDefaultDisplay()
.getMetrics(displayMetrics);
在某些情况下,设备有导航栏,您必须在运行时检查:
public boolean showNavigationBar(Resources resources)
{
int id = resources.getIdentifier("config_showNavigationBar", "bool", "android");
return id > 0 && resources.getBoolean(id);
}
如果设备有导航栏,则计算其高度:
private int getNavigationBarHeight() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int usableHeight = metrics.heightPixels;
getWindowManager().getDefaultDisplay().getRealMetrics(metrics);
int realHeight = metrics.heightPixels;
if (realHeight > usableHeight)
return realHeight - usableHeight;
else
return 0;
}
return 0;
}
所以设备的最终高度为:
int height = displayMetrics.heightPixels + getNavigationBarHeight();
有一个非常简单的答案,没有通过上下文
public static int getScreenWidth() {
return Resources.getSystem().getDisplayMetrics().widthPixels;
}
public static int getScreenHeight() {
return Resources.getSystem().getDisplayMetrics().heightPixels;
}
注意:如果你想要高度包括导航栏,使用下面的方法
WindowManager windowManager =
(WindowManager) BaseApplication.getApplication().getSystemService(Context.WINDOW_SERVICE);
final Display display = windowManager.getDefaultDisplay();
Point outPoint = new Point();
if (Build.VERSION.SDK_INT >= 19) {
// include navigation bar
display.getRealSize(outPoint);
} else {
// exclude navigation bar
display.getSize(outPoint);
}
if (outPoint.y > outPoint.x) {
mRealSizeHeight = outPoint.y;
mRealSizeWidth = outPoint.x;
} else {
mRealSizeHeight = outPoint.x;
mRealSizeWidth = outPoint.y;
}
只是为了更新 parag 和 SpK 的答案,以与弃用方法的当前 SDK 向后兼容性保持一致:
int Measuredwidth = 0;
int Measuredheight = 0;
Point size = new Point();
WindowManager w = getWindowManager();
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
w.getDefaultDisplay().getSize(size);
Measuredwidth = size.x;
Measuredheight = size.y;
}else{
Display d = w.getDefaultDisplay();
Measuredwidth = d.getWidth();
Measuredheight = d.getHeight();
}
getSize
实现中获取非 0 返回值,但此答案中不推荐使用的方法可以正确返回。所以这对旧版本的 Android 很有用。
为什么不
DisplayMetrics displaymetrics = getResources().getDisplayMetrics();
然后使用
displayMetrics.widthPixels (heightPixels)
widthPixels
或 heightPixels
在 Fragment
的 onViewCreated()
中返回 0。如果您想计算 GridLayoutManager
的跨度计数,这真的很烦人。
进入Android非常容易:
int width = Resources.getSystem().getDisplayMetrics().widthPixels;
int height = Resources.getSystem().getDisplayMetrics().heightPixels;
• Kotlin 版本通过扩展属性
如果您想知道以像素为单位的屏幕大小以及 dp
,使用这些扩展属性确实很有帮助:
DimensionUtils.kt
import android.content.Context
import android.content.res.Resources
import android.graphics.Rect
import android.graphics.RectF
import android.os.Build
import android.util.DisplayMetrics
import android.view.WindowManager
import kotlin.math.roundToInt
/**
* @author aminography
*/
private val displayMetrics: DisplayMetrics by lazy { Resources.getSystem().displayMetrics }
/**
* Returns boundary of the screen in pixels (px).
*/
val screenRectPx: Rect
get() = displayMetrics.run { Rect(0, 0, widthPixels, heightPixels) }
/**
* Returns boundary of the screen in density independent pixels (dp).
*/
val screenRectDp: RectF
get() = screenRectPx.run { RectF(0f, 0f, right.px2dp, bottom.px2dp) }
/**
* Returns boundary of the physical screen including system decor elements (if any) like navigation
* bar in pixels (px).
*/
val Context.physicalScreenRectPx: Rect
get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
(applicationContext.getSystemService(Context.WINDOW_SERVICE) as WindowManager)
.run { DisplayMetrics().also { defaultDisplay.getRealMetrics(it) } }
.run { Rect(0, 0, widthPixels, heightPixels) }
} else screenRectPx
/**
* Returns boundary of the physical screen including system decor elements (if any) like navigation
* bar in density independent pixels (dp).
*/
val Context.physicalScreenRectDp: RectF
get() = physicalScreenRectPx.run { RectF(0f, 0f, right.px2dp, bottom.px2dp) }
/**
* Converts any given number from pixels (px) into density independent pixels (dp).
*/
val Number.px2dp: Float
get() = this.toFloat() / displayMetrics.density
/**
* Converts any given number from density independent pixels (dp) into pixels (px).
*/
val Number.dp2px: Int
get() = (this.toFloat() * displayMetrics.density).roundToInt()
用法:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val widthPx = screenRectPx.width()
val heightPx = screenRectPx.height()
println("[PX] screen width: $widthPx , height: $heightPx")
val widthDp = screenRectDp.width()
val heightDp = screenRectDp.height()
println("[DP] screen width: $widthDp , height: $heightDp")
println()
val physicalWidthPx = physicalScreenRectPx.width()
val physicalHeightPx = physicalScreenRectPx.height()
println("[PX] physical screen width: $physicalWidthPx , height: $physicalHeightPx")
val physicalWidthDp = physicalScreenRectDp.width()
val physicalHeightDp = physicalScreenRectDp.height()
println("[DP] physical screen width: $physicalWidthDp , height: $physicalHeightDp")
}
}
结果:
当设备处于 portrait
方向时:
[PX] screen width: 1440 , height: 2392
[DP] screen width: 360.0 , height: 598.0
[PX] physical screen width: 1440 , height: 2560
[DP] physical screen width: 360.0 , height: 640.0
当设备处于 landscape
方向时:
[PX] screen width: 2392 , height: 1440
[DP] screen width: 598.0 , height: 360.0
[PX] physical screen width: 2560 , height: 1440
[DP] physical screen width: 640.0 , height: 360.0
Context.physicalScreenRectPx
和 Context.physicalScreenRectDp
获取屏幕的实际尺寸。
试试下面的代码: -
1.
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
2.
Display display = getWindowManager().getDefaultDisplay();
int width = display.getWidth(); // deprecated
int height = display.getHeight(); // deprecated
或者
int width = getWindowManager().getDefaultDisplay().getWidth();
int height = getWindowManager().getDefaultDisplay().getHeight();
3.
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
metrics.heightPixels;
metrics.widthPixels;
您可以从上下文中获取宽度和高度
爪哇:
int width= context.getResources().getDisplayMetrics().widthPixels;
int height= context.getResources().getDisplayMetrics().heightPixels;
科特林
val width: Int = context.resources.displayMetrics.widthPixels
val height: Int = context.resources.displayMetrics.heightPixels
DisplayMetrics lDisplayMetrics = getResources().getDisplayMetrics();
int widthPixels = lDisplayMetrics.widthPixels;
int heightPixels = lDisplayMetrics.heightPixels;
对于 kotlin 用户
fun Activity.displayMetrics(): DisplayMetrics {
val displayMetrics = DisplayMetrics()
windowManager.defaultDisplay.getMetrics(displayMetrics)
return displayMetrics
}
在活动中,您可以像这样使用它
resources.displayMetrics.let { displayMetrics ->
val height = displayMetrics.heightPixels
val width = displayMetrics.widthPixels
}
或者在片段中
activity?.displayMetrics()?.run {
val height = heightPixels
val width = widthPixels
}
API 级别 31 中已弃用某些适用于检索屏幕尺寸的方法,包括 Display.getRealMetrics()
和 Display.getRealSize()
。从 API 级别 30 开始,我们可以使用 WindowManager#getCurrentWindowMetrics()
。获取屏幕大小的干净方法是创建一些 Compat 类,例如:
object ScreenMetricsCompat {
private val api: Api =
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) ApiLevel30()
else Api()
/**
* Returns screen size in pixels.
*/
fun getScreenSize(context: Context): Size = api.getScreenSize(context)
@Suppress("DEPRECATION")
private open class Api {
open fun getScreenSize(context: Context): Size {
val display = context.getSystemService(WindowManager::class.java).defaultDisplay
val metrics = if (display != null) {
DisplayMetrics().also { display.getRealMetrics(it) }
} else {
Resources.getSystem().displayMetrics
}
return Size(metrics.widthPixels, metrics.heightPixels)
}
}
@RequiresApi(Build.VERSION_CODES.R)
private class ApiLevel30 : Api() {
override fun getScreenSize(context: Context): Size {
val metrics: WindowMetrics = context.getSystemService(WindowManager::class.java).currentWindowMetrics
return Size(metrics.bounds.width(), metrics.bounds.height())
}
}
}
在 Activity
中调用 ScreenMetricsCompat.getScreenSize(this).height
我们可以获得屏幕高度。
ContextCompat.getSystemService(context, WindowManager::class.java)?.defaultDisplay
而不是 context.getSystemService(WindowManager::class.java).defaultDisplay
安全地定位小于 23 的 API
DisplayMetrics dimension = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dimension);
int width = dimension.widthPixels;
int height = dimension.heightPixels;
获取屏幕宽度和高度的值。
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;
此处的所有答案都不适用于 Chrome OS 多显示器或即将推出的可折叠设备。
在查找当前配置时,请始终使用 getResources().getConfiguration() 中当前活动的配置。不要使用后台活动中的配置或系统资源中的配置。后台活动没有大小,系统配置可能包含多个大小和方向冲突的窗口,因此无法提取可用数据。
所以答案是
val config = context.getResources().getConfiguration()
val (screenWidthPx, screenHeightPx) = config.screenWidthDp.dp to config.screenHeightDp.dp
正如 android 官方文档所说,默认显示使用 Context#getDisplay() 因为此方法在 API 级别 30 中已弃用。
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
下面给出的这段代码是在 kotlin 中编写的,它是根据最新版本的 Android 编写的,可以帮助您确定宽度和高度:
fun getWidth(context: Context): Int {
var width:Int = 0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
val displayMetrics = DisplayMetrics()
val display: Display? = context.getDisplay()
display!!.getRealMetrics(displayMetrics)
return displayMetrics.widthPixels
}else{
val displayMetrics = DisplayMetrics()
this.windowManager.defaultDisplay.getMetrics(displayMetrics)
width = displayMetrics.widthPixels
return width
}
}
fun getHeight(context: Context): Int {
var height: Int = 0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
val displayMetrics = DisplayMetrics()
val display = context.display
display!!.getRealMetrics(displayMetrics)
return displayMetrics.heightPixels
}else {
val displayMetrics = DisplayMetrics()
this.windowManager.defaultDisplay.getMetrics(displayMetrics)
height = displayMetrics.heightPixels
return height
}
}
var one= getHeight(this)
等函数,显示器的高度值将存储在变量一中,因为函数在调用时返回高度和宽度值。
fun Activity.getRealScreenSize(): Pair<Int, Int> { //<width, height>
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
val size = Point()
display?.getRealSize(size)
Pair(size.x, size.y)
} else {
val size = Point()
windowManager.defaultDisplay.getRealSize(size)
Pair(size.x, size.y)
}}
这是一个扩展功能,您可以通过以下方式在您的活动中使用:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val pair = getRealScreenSize()
pair.first //to get width
pair.second //to get height
}
我建议你创建扩展函数。
/**
* Return the width and height of the screen
*/
val Context.screenWidth: Int
get() = resources.displayMetrics.widthPixels
val Context.screenHeight: Int
get() = resources.displayMetrics.heightPixels
/**
* Pixel and Dp Conversion
*/
val Float.toPx get() = this * Resources.getSystem().displayMetrics.density
val Float.toDp get() = this / Resources.getSystem().displayMetrics.density
val Int.toPx get() = (this * Resources.getSystem().displayMetrics.density).toInt()
val Int.toDp get() = (this / Resources.getSystem().displayMetrics.density).toInt()
完整的方法,返回真正的分辨率:
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Point size = new Point();
wm.getDefaultDisplay().getRealSize(size);
final int width = size.x, height = size.y;
并且由于这可以在不同的方向上改变,这里有一个解决方案(在 Kotlin 中),无论方向如何都能正确处理:
/**
* returns the natural orientation of the device: Configuration.ORIENTATION_LANDSCAPE or Configuration.ORIENTATION_PORTRAIT .<br></br>
* The result should be consistent no matter the orientation of the device
*/
@JvmStatic
fun getScreenNaturalOrientation(context: Context): Int {
//based on : http://stackoverflow.com/a/9888357/878126
val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
val config = context.resources.configuration
val rotation = windowManager.defaultDisplay.rotation
return if ((rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180) && config.orientation == Configuration.ORIENTATION_LANDSCAPE || (rotation == Surface.ROTATION_90 || rotation == Surface.ROTATION_270) && config.orientation == Configuration.ORIENTATION_PORTRAIT)
Configuration.ORIENTATION_LANDSCAPE
else
Configuration.ORIENTATION_PORTRAIT
}
/**
* returns the natural screen size (in pixels). The result should be consistent no matter the orientation of the device
*/
@JvmStatic
fun getScreenNaturalSize(context: Context): Point {
val screenNaturalOrientation = getScreenNaturalOrientation(context)
val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
val point = Point()
wm.defaultDisplay.getRealSize(point)
val currentOrientation = context.resources.configuration.orientation
if (currentOrientation == screenNaturalOrientation)
return point
else return Point(point.y, point.x)
}
我使用以下代码获取屏幕尺寸
getWindow().getDecorView().getWidth()
getWindow().getDecorView().getHeight()
由于不推荐使用 getMetrics 和 getRealMetrics,Google 建议按如下方式确定屏幕宽度和高度:
WindowMetrics windowMetrics = getActivity().getWindowManager().getMaximumWindowMetrics();
Rect bounds = windowMetrics.getBounds();
int widthPixels = bounds.width();
int heightPixels = bounds.height();
但是,我想出了另一种可以给我相同结果的方法:
Configuration configuration = mContext.getResources().getConfiguration();
Display.Mode mode = display.getMode();
int widthPixels = mode.getPhysicalWidth();
int heightPixels = mode.getPhysicalHeight();
Display display = ((WindowManager) this.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int mWidthScreen = display.getWidth();
int mHeightScreen = display.getHeight();
public class DisplayInfo {
int screen_height=0, screen_width=0;
WindowManager wm;
DisplayMetrics displaymetrics;
DisplayInfo(Context context) {
getdisplayheightWidth(context);
}
void getdisplayheightWidth(Context context) {
wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
displaymetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(displaymetrics);
screen_height = displaymetrics.heightPixels;
screen_width = displaymetrics.widthPixels;
}
public int getScreen_height() {
return screen_height;
}
public int getScreen_width() {
return screen_width;
}
}
此处显示的方法已弃用/过时,但这仍然有效。需要 API 13
一探究竟
Display disp= getWindowManager().getDefaultDisplay();
Point dimensions = new Point();
disp.getSize(size);
int width = size.x;
int height = size.y;
正如 android 官方文档所说,默认显示使用 Context#getDisplay() 因为此方法在 API 级别 30 中已弃用。
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
这碗代码有助于确定宽度和高度。
public static int getWidth(Context context) {
DisplayMetrics displayMetrics = new DisplayMetrics();
Display display = context.getDisplay();
if (display != null) {
display.getRealMetrics(displayMetrics);
return displayMetrics.widthPixels;
}
return -1;
}
对于高度:
public static int getHeight(Context context) {
DisplayMetrics displayMetrics = new DisplayMetrics();
Display display = context.getDisplay();
if (display != null) {
display.getRealMetrics(displayMetrics);
return displayMetrics.heightPixels;
}
return -1;
}
试试这个 Kotlin 的代码
val display = windowManager.defaultDisplay
val size = Point()
display.getSize(size)
var DEVICE_WIDTH = size.x
var DEVICE_HEIGHT = size.y
对于装有 Android 11 的 Galaxy M51,似乎所有这些答案都失败了。在做了一些研究之后,我发现了这段代码:
WindowMetrics windowmetrics = MainActivity.getWindowManager().getCurrentWindowMetrics();
Rect rect = windowmetrics.getBounds();
int width = rect.right;
int height =rect.bottom;
显示我的真实设备分辨率为 1080x2400,其余仅返回 810x1800。
只需使用下面的函数将屏幕尺寸的宽度和高度作为整数数组返回
private int[] getScreenSIze(){
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int h = displaymetrics.heightPixels;
int w = displaymetrics.widthPixels;
int[] size={w,h};
return size;
}
在您的 onCreate 函数或按钮上单击添加以下代码以输出屏幕尺寸,如下所示
int[] screenSize= getScreenSIze();
int width=screenSize[0];
int height=screenSize[1];
screenSizes.setText("Phone Screen sizes \n\n width = "+width+" \n Height = "+height);
我更新了 Kotlin 语言的答案!
对于 Kotlin:您应该调用 Window Manager 并获取指标。在那个简单的方法之后。
val displayMetrics = DisplayMetrics()
windowManager.defaultDisplay.getMetrics(displayMetrics)
var width = displayMetrics.widthPixels
var height = displayMetrics.heightPixels
我们如何通过 Kotlin 语言以独立活动的方式有效地使用它?
在这里,我在一般的 Kotlin 类中创建了一个方法。您可以在所有活动中使用它。
private val T_GET_SCREEN_WIDTH:String = "screen_width"
private val T_GET_SCREEN_HEIGHT:String = "screen_height"
private fun getDeviceSizes(activity:Activity, whichSize:String):Int{
val displayMetrics = DisplayMetrics()
activity.windowManager.defaultDisplay.getMetrics(displayMetrics)
return when (whichSize){
T_GET_SCREEN_WIDTH -> displayMetrics.widthPixels
T_GET_SCREEN_HEIGHT -> displayMetrics.heightPixels
else -> 0 // Error
}
}
我在此页面中找到了 weigan 的最佳答案,您可以在 Xamarin.Android
中使用它:
public int GetScreenWidth()
{
return Resources.System.DisplayMetrics.WidthPixels;
}
public int GetScreenHeight()
{
return Resources.System.DisplayMetrics.HeightPixels;
}
屏幕分辨率是屏幕中像素的总数。以下程序将提取设备的屏幕分辨率。它将打印屏幕宽度和高度。这些值以像素为单位。
public static Point getScreenResolution(Context context) {
// get window managers
WindowManager manager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
Display display = manager.getDefaultDisplay();
Point point = new Point();
display.getSize(point);
// get width and height
int width = point.x;
int height = point.y;
return point;
}