A realização do sensor Android (caixa de entrada)

Etapas de uso do sensor

1. Obtenha o objeto SensorManager por meio de Contexto

2. Registre o ouvinte para sensorManager (onResume of Activity)

Significado do parâmetro:
1.SensorEventListenner ouvinte ouvinte para monitorar eventos do sensor
2., Sensor sensor, objeto sensor
3.int samplingPeriodUs a frequência de aquisição de dados do sensor
(1) SensorManager.SENSOR_DELAY_GAME
(2) SensorManager.SENSOR_DELAY_FASTEST
(3) SensorManager.SENSOR_DELAY_UI

3. Cancelar o registro no método de atividade onPause

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

Obtenha os dados de retorno de chamada no método onSensorChanged

Reescreva onSensorChanged no método de implementação dos implementos SensorEventListener,
que tem três valores para os valores dos eixos x, y e z: valores [0], valores [1], valores [2]

código java

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) {
    
    

    }
}

código xml

<?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>

Display de interface