[Android Studio/Kotlin] Motion Sensor, Wi-Fi

[안드로이드 스튜디오/코틀린] 동작 센서, 와이파이

Motion Sensor

activity_main.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"
    android:orientation="vertical"
    tools:context=".MainActivity">

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.shinyelee.android_study2

import android.content.Context
import android.hardware.Sensor
import android.hardware.SensorEvent
import android.hardware.SensorEventListener
import android.hardware.SensorManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.shinyelee.android_study2.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity(), SensorEventListener {

    private var vBinding : ActivityMainBinding? = null
    private val binding get() = vBinding!!

    lateinit var sensorManager: SensorManager

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        vBinding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)
    }

    override fun onResume() {
        sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
        sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE), SensorManager.SENSOR_DELAY_NORMAL)
        super.onResume()
    }

    override fun onPause() {
        sensorManager.unregisterListener(this)
        super.onPause()
    }

    override fun onAccuracyChanged(p0: Sensor?, p1: Int) {

    }

    override fun onSensorChanged(event: SensorEvent?) {
        val x = event?.values?.get(0) as Float
        val y = event?.values?.get(1) as Float
        val z = event?.values?.get(2) as Float
        println(x.toString() + ", " + y.toString() + ", " + z.toString())
    }

    override fun onDestroy() {
        vBinding = null
        super.onDestroy()
    }

}

---

Wi-fi

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.shinyelee.android_study2">

    <!-- 인터넷/와이파이 접근 위해 코드 추가 -->
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <!-- 생략 -->

</manifest>

activity_main.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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn"
        android:text="BUTTON"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.shinyelee.android_study2

import android.content.Context
import android.net.ConnectivityManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import com.shinyelee.android_study2.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    private var vBinding : ActivityMainBinding? = null
    private val binding get() = vBinding!!

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        vBinding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        binding.btn.setOnClickListener { NetworkCheck(binding.btn) }
    }

    fun NetworkCheck(v: View) {
        val connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
        println(connectivityManager.activeNetworkInfo?.isConnected)
    }
    override fun onDestroy() {
        vBinding = null
        super.onDestroy()
    }

}

와이파이가 켜져 있을 때

버튼을 클릭하면

true 출력

와이파이와 데이터가

모두 꺼져 있을 때

버튼을 클릭하면

null 출력

---

참고