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注：编译 sdk 需要使用 30

因为引入了 WindowMetrics、uild.VERSION_CODES.R 新 sdk 才存在的类和属性

某些场景处理 view ，对 view 显示的位置要求比较精确，通常我们使用context.getResources().getDisplayMetrics().widthPixels 获取到的宽、高是不包含状态栏等高度，在计算坐标、偏移量时可能就不精确了，那么就需要获取设备的物理尺寸——包含状态栏高度等不显示区域。

import android.graphics.Point;
import android.graphics.Rect;
import android.util.Pair;
import android.util.Size;
import android.view.WindowManager;
import android.view.WindowMetrics;import androidx.annotation.RequiresApi;@RequiresApi(api = Build.VERSION_CODES.R)
private static Size getPhysicalScreenSize30(Context context) {WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);if (windowManager != null) {WindowMetrics windowMetrics = windowManager.getCurrentWindowMetrics();Rect bounds = windowMetrics.getBounds();return new Size(bounds.width(), bounds.height());}return new Size(-1,-1);
}@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private static Size getPhysicalScreenSize29(Context context) {WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);if (windowManager != null) {Point size = new Point();windowManager.getDefaultDisplay().getRealSize(size);return new Size(size.x, size.y);}return new Size(-1,-1);
}public static Pair<Integer, Integer> getPhysicalScreenSize(Context context) {int w = -1, h = -1;if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {Size size = getPhysicalScreenSize30(context);w = size.getWidth();h = size.getHeight();} else {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {Size size = getPhysicalScreenSize29(context);w = size.getWidth();h = size.getHeight();}}if (w != -1 && h != -1) {return new Pair<>(w, h);}//最不济的情况就返回非物理尺寸吧w = context.getResources().getDisplayMetrics().widthPixels;h = context.getResources().getDisplayMetrics().heightPixels;return new Pair<>(w, h);
}