收起
自动换行
深色代码主题
复制
query() {
  // 获取传感器列表
  try {
    sensor.getSensorList((err: BusinessError, data: Array<sensor.Sensor>) => {
      if (err) {
        console.error(`Failed to get sensorList. Code: ${err.code}, message: ${err.message}`);
        return;
      }
      this.sensorList = data;
      this.sensorListStr = [];
      for (let i = 0; i < data.length; i++) {
        this.sensorListStr.push(data[i].sensorId + ' ' + data[i].sensorName);
      }
    });
  } catch (error) {
    let e: BusinessError = error as BusinessError;
    console.error(`Failed to get sensorList. Code: ${e.code}, message: ${e.message}`);
  }
}

使用try catch保证不崩溃

下面以重力传感器为例：

收起
自动换行
深色代码主题
复制
onDegree() {
  try {
    sensor.on(sensor.SensorId.GRAVITY, (data: sensor.GravityResponse) => {
      this.degree = [];
      this.degree.push(data.x.toString());
      this.degree.push(data.y.toString());
      this.degree.push(data.z.toString());
    });
  } catch (error) {
    let e: BusinessError = error as BusinessError;
    this.degree.push(e.code.toString());
    this.degree.push(e.message);
    console.error(`Failed to get sensorList. Code: ${e.code}, message: ${e.message}`);
  }
}


disDegree() {
  try {
    sensor.off(sensor.SensorId.GRAVITY);
    this.degree = [];
  } catch (error) {
    let e: BusinessError = error as BusinessError;
    this.degree.push(e.code.toString());
    this.degree.push(e.message);
    console.error(`Failed to get sensorList. Code: ${e.code}, message: ${e.message}`);
  }
}

完整示例代码如下：

收起
自动换行
深色代码主题
复制
import { sensor } from '@kit.SensorServiceKit';
import { BusinessError } from '@kit.BasicServicesKit';


@Entry
@Component
struct Index {
  sensorList: Array<sensor.Sensor> = [];
  @State sensorListStr: Array<string> = [];
  @State degree: Array<string> = [];


  query() {
    // 获取传感器列表
    try {
      sensor.getSensorList((err: BusinessError, data: Array<sensor.Sensor>) => {
        if (err) {
          console.error(`Failed to get sensorList. Code: ${err.code}, message: ${err.message}`);
          return;
        }
        this.sensorList = data;
        this.sensorListStr = [];
        for (let i = 0; i < data.length; i++) {
          this.sensorListStr.push(data[i].sensorId + ' ' + data[i].sensorName);
        }
      });
    } catch (error) {
      let e: BusinessError = error as BusinessError;
      console.error(`Failed to get sensorList. Code: ${e.code}, message: ${e.message}`);
    }
  }




  onDegree() {
    try {
      sensor.on(sensor.SensorId.GRAVITY, (data: sensor.GravityResponse) => {
        this.degree = [];
        this.degree.push(data.x.toString());
        this.degree.push(data.y.toString());
        this.degree.push(data.z.toString());
      });
    } catch (error) {
      let e: BusinessError = error as BusinessError;
      this.degree.push(e.code.toString());
      this.degree.push(e.message);
      console.error(`Failed to get sensorList. Code: ${e.code}, message: ${e.message}`);
    }
  }


  disDegree() {
    try {
      sensor.off(sensor.SensorId.GRAVITY);
      this.degree = [];
    } catch (error) {
      let e: BusinessError = error as BusinessError;
      this.degree.push(e.code.toString());
      this.degree.push(e.message);
      console.error(`Failed to get sensorList. Code: ${e.code}, message: ${e.message}`);
    }
  }




  build() {
    Column({ space: 16 }) {
      Button('查询支持的传感器列表')
        .onClick(() => {
          this.query();
        });
      Button('启动重力传感器')
        .onClick(() => {
          this.onDegree();
        });
      Button('关闭重力传感器')
        .onClick(() => {
          this.disDegree();
        });
      Text('重力传感器数据：');
      Text(`${this.degree.join('\n')}`);
      Text('传感器列表如下：\n ');
      Text(`${this.sensorListStr.join('\n')}`);
    }
    .height('100%')
    .width('100%');
  }
}

总结

涉及传感器接口时：建议加try catch避免代码崩溃。

罗盘指南针方向与实际不符

穿戴服务（Wear Engine Kit）

意见反馈

以上内容对您是否有帮助？

意见反馈

如果您有其他疑问，您也可以通过开发者社区问答频道来和我们联系探讨。

社区提问智能客服提问