HarmonyOS 鸿蒙Next 传感器判断屏幕方向

可以使用媒体查询接口监听屏幕旋转。参考代码如下：

import { mediaquery } from '[@kit](/user/kit).ArkUI';
let listener = mediaquery.matchMediaSync('(orientation: landscape)'); // 监听横屏事件
function onPortrait(mediaQueryResult: mediaquery.MediaQueryResult) {
if (mediaQueryResult.matches) {
// do something here
} else {
// do something here
}
}
listener.on('change', onPortrait) // 注册回调
listener.off('change', onPortrait) // 去注册回调

调用OrientationResponse 接口可以读取到alpha， beta， gamma 三个属性 分别表示Z轴， X轴， Y轴的旋转角度 

可以读取角度进行判断  判断逻辑请参考指南连接的demo实例： 【  https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/sensor-guidelines-V5  】

三维坐标系的概念详情和代码详解请访问参考链接：【  https://www.runoob.com/w3cnote/android-tutorial-sensor2.html  】

以下为方向传感器的三个值xyz获取的代码demo实例

import sensor from "[@ohos](/user/ohos).sensor"

import BusinessError from "[@ohos](/user/ohos).base"

try {

 sensor.once(sensor.SensorId.ORIENTATION, (data: sensor.OrientationResponse) => {

   console.info('Succeeded in the device rotating at an angle around the X axis: ' + data.beta);

   console.info('Succeeded in the device rotating at an angle around the Y axis: ' + data.gamma);

   console.info('Succeeded in the device rotating at an angle around the Z axis: ' + data.alpha);

 });

} catch (error) {

 let e: BusinessError.BusinessError = error as BusinessError.BusinessError;

 console.error(`Failed to invoke once. Code: ${e.code}, message: ${e.message}`);

}