app直播源代码，Flutter 宽高自适应

app直播源代码，Flutter 宽高自适应

工具类代码如下：

import 'dart:ui';
class HYSizeFit {
  static double screenWidth = 0.0;
  static double screenHeight = 0.0;
  static double physicalWidth = 0.0;
  static double physicalHeight = 0.0;
  static double dpr = 0.0;
  static double statusHeight = 0.0;
  static double rpx = 0.0;
  static double px = 0.0;
  static void initialize({double standardSize = 750}) {
    // 1、手机的物理分辨率
    physicalWidth = window.physicalSize.width;
    physicalHeight = window.physicalSize.height;
    // 2、 获取dpr
    dpr = window.devicePixelRatio;
    // 3、宽度和高度
    screenWidth = physicalWidth / dpr;
    screenHeight = physicalHeight / dpr;
    // 4、 状态栏高度
    statusHeight = window.padding.top / dpr;
    // 5、计算 rpx 的大小
    rpx = screenWidth / standardSize;
    px = screenWidth / standardSize * 2;
  }
// 按照像素来设置
  static double setPx(double size) {
    return px * size;
  }
// 按照rpx来设置
  static double setRpx(double size) {
    return rpx * size;
  }
} 

​

扩展(extension)代码

import 'hysize.dart';
extension DoubleFit on double {
  double get px {
    return HYSizeFit.setPx(this);
  }
  double get rpx {
    return HYSizeFit.setRpx(this);
  }
}
extension IntFit on int {
  double get px {
    return HYSizeFit.setPx(toDouble());
  }
  double get rpx {
    return HYSizeFit.setRpx(toDouble());
  }
}

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