我如何获得屏幕的宽度和高度,并使用这个值在:
@Override protected void onMeasure(int widthSpecId, int heightSpecId) {
Log.e(TAG, "onMeasure" + widthSpecId);
setMeasuredDimension(SCREEN_WIDTH, SCREEN_HEIGHT -
game.findViewById(R.id.flag).getHeight());
}
我如何获得屏幕的宽度和高度,并使用这个值在:
@Override protected void onMeasure(int widthSpecId, int heightSpecId) {
Log.e(TAG, "onMeasure" + widthSpecId);
setMeasuredDimension(SCREEN_WIDTH, SCREEN_HEIGHT -
game.findViewById(R.id.flag).getHeight());
}
当前回答
完整的方法是使用“getRealSize”来返回真实的分辨率(包括当用户改变分辨率时)。
我注意到所有其他可用的函数,包括文档中说要用的代替this的函数,在某些情况下结果会更小。
下面是代码:
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Point size = new Point();
wm.getDefaultDisplay().getRealSize(size);
final int width = size.x, height = size.y;
因为这可以在不同的方向上改变,这里有一个解决方案(在Kotlin中),无论朝向如何,都能得到正确的结果:
/**
* 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)
}
其他回答
使用这段代码,你可以得到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,你需要这样做:
((Activity) getContext()).getWindowManager()
.getDefaultDisplay()
.getMetrics(displayMetrics);
在某些情况下,设备有一个导航栏,你必须在运行时检查:
public boolean showNavigationBar(Resources resources)
{
int id = resources.getIdentifier("config_showNavigationBar", "bool", "android");
return id > 0 && resources.getBoolean(id);
}
如果设备有一个导航栏,那么计算它的高度:
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是:
int height = displayMetrics.heightPixels + getNavigationBarHeight();
正如android官方文档所说,默认显示使用Context#getDisplay(),因为该方法在API级别30中已弃用。
.getDefaultDisplay getWindowManager () () .getMetrics (displayMetrics);
下面给出的代码是kotlin,是根据Android的最新版本编写的,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
}
}
我发现weigan的答案最好的一个在这一页,这里是如何在Xamarin使用它。Android:
public int GetScreenWidth()
{
return Resources.System.DisplayMetrics.WidthPixels;
}
public int GetScreenHeight()
{
return Resources.System.DisplayMetrics.HeightPixels;
}
我使用下面的代码来获取屏幕尺寸
getWindow().getDecorView().getWidth()
getWindow().getDecorView().getHeight()
这里显示的方法已弃用/过时,但仍然可以工作。需要API 13
看看吧
Display disp= getWindowManager().getDefaultDisplay();
Point dimensions = new Point();
disp.getSize(size);
int width = size.x;
int height = size.y;