HarmonyOS鸿蒙Next中加速度传感器获取不到

楼主你好，不同类型的传感器需要不同的Agent对象，例如SENSOR_TYPE_ACCELEROMETER，需要使用CategoryMotionAgent，具体可以参考如下代码：

```java
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Button;
import ohos.sensor.agent.CategoryMotionAgent;
import ohos.sensor.bean.CategoryMotion;
import ohos.sensor.data.CategoryMotionData;
import ohos.sensor.listener.ICategoryMotionDataCallback;

public class SensorSlice extends AbilitySlice {
    private static final long INTERVAL = 100000000L;
    private Button btnSubscribe;
    private Button btnUnsubscribe;
    private CategoryMotionAgent categoryOrientationAgent = new CategoryMotionAgent();
    private ICategoryMotionDataCallback orientationDataCallback;
    private CategoryMotion orientationSensor;

    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_sensor);
        findComponent();
        
        // 创建传感器回调对象。
        orientationDataCallback = new ICategoryMotionDataCallback() {
            @Override
            public void onSensorDataModified(CategoryMotionData categoryMotionData) {
            }
            
            @Override
            public void onAccuracyDataModified(CategoryMotion categoryMotion, int i) {
            }
            
            @Override
            public void onCommandCompleted(CategoryMotion categoryMotion) {
            }
        };
        
        btnSubscribe.setClickedListener(v -> {
            // 获取传感器对象，并订阅传感器数据
            orientationSensor = categoryOrientationAgent.getSingleSensor(
                    CategoryMotion.SENSOR_TYPE_ACCELEROMETER);
            if (orientationSensor != null) {
                categoryOrientationAgent.setSensorDataCallback(
                        orientationDataCallback, orientationSensor, INTERVAL);
            }
        });
        
        // 取消订阅传感器数据
        btnUnsubscribe.setClickedListener(v -> {
            if (orientationSensor != null) {
                categoryOrientationAgent.releaseSensorDataCallback(
                        orientationDataCallback, orientationSensor);
            }
        });
    }
    
    private void findComponent() {
        btnSubscribe = (Button) findComponentById(ResourceTable.Id_btnSubscribe);
        btnUnsubscribe = (Button) findComponentById(ResourceTable.Id_btnUnsubscribe);
    }
}