1.通过Context获取到SensorManager对象

2.为sensorManager注册监听器（在Activity的 onResume）

参数含义：
1.SensorEventListenner listener 监听传感器事件的监听器
2.,Sensor sensor, 传感器对象
3.int samplingPeriodUs 获取传感器数据的频率
（1）SensorManager.SENSOR_DELAY_GAME
（2）SensorManager.SENSOR_DELAY_FASTEST
(3)SensorManager.SENSOR_DELAY_UI

3.在Activity的 onPause方法取消注册

sensorManager.registerListener(this,sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),SensorManager.SENSOR_DELAY_GAME);

onSensorChanged方法中获得回调的数据

implements SensorEventListener的实现方法中重写onSensorChanged，
里面有三个值分别为x，y，z轴值：values[0],values[1],values[2]

package com.mt.sensor;

import android.annotation.TargetApi;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Build;
import android.os.Bundle;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity  implements SensorEventListener {
    TextView exTxt1;
SensorManager sensorManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        exTxt1= findViewById(R.id.txt1);
        //1.获取系统的传感器管理服务
        sensorManager= (SensorManager) getSystemService(Context.SENSOR_SERVICE);


    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    @Override
    protected void onResume() {
        super.onResume();
        //2.为系统的加速度传感器注册监听事件
        sensorManager.registerListener(this,sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),SensorManager.SENSOR_DELAY_GAME);
    }

    @Override
    protected void onPause() {
        super.onPause();
        //取消注册
        sensorManager.unregisterListener(this);
    }
//传感器的1值发生变化回调
    @Override
    public void onSensorChanged(SensorEvent sensorEvent) {
        float[] values=sensorEvent.values;
        String sb="x方向加速度："+
                values[0]+
                "\nY轴方向加速度："+
                values[1]+
                "\nZ轴方向加速度："+
                values[2];
        exTxt1.setText(sb);
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int i) {

    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/txt1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>