Android获取屏幕尺寸的方法

/*
         * Obtain the window manager and default display, which we will use to
         * find out the size of the device‘s display (in pixels)
         */
        WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
        Display display = windowManager.getDefaultDisplay();

        /* Obtain the API level of the device running the game */
        int api = android.os.Build.VERSION.SDK_INT;

        /*
         * We‘re dealing with deprecated methods, so we filter older devices
         * (less than api 13) to use the older methods, while the new API levels
         * will use the non-deprecated methods in ord to obtain the device‘s
         * display size
         */
        if (api >= 13) {
            Point point = new Point();

            /* Pass the display size to the point object */
            display.getSize(point);

            /*
             * pass the device‘s display size to our width/height variables to
             * capture
             */
            mDisplayWidth = point.x;
            mDisplayHeight = point.y;
        } else {

            /*
             * If API level is less than 13, revert to using the deprecated
             * methods used for grabbing the device‘s display size
             */
            mDisplayWidth = display.getWidth();
            mDisplayHeight = display.getHeight();
        }