안드로이드 시스템 메시지

안드로이드에서는 단말기에서 사건이 발생했을 경우 각 사건에 대해 정해진 메시지를 발생시킨다.
메시지가 발생되면 이에 반응하는 Broad Cast Receiver 들이 동작하게 된다.
실제로는 개발자가 각 사건에 대한 이름으로 Broad Cast Receiver를 등록해 놓으면 OS가 이를 찾아 동작시키는 방식이다.
안드로이드 8.0 부터 사용할 수 있는 시스템 메시지의 수가 줄어들었다.

 

https://developer.android.com/guide/components/broadcast-exceptions.html

암시적 브로드캐스트 예외  |  Android 개발자  |  Android Developers

메인

package com.example.systemmessage

import android.Manifest
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle

class MainActivity : AppCompatActivity() {

    val permissionList = arrayOf(
        Manifest.permission.RECEIVE_BOOT_COMPLETED,
        Manifest.permission.READ_PHONE_STATE,
        Manifest.permission.RECEIVE_SMS,

    )

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        requestPermissions(permissionList,0)
    }
}

 

리시버

package com.example.systemmessage

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.telephony.SmsMessage

import android.widget.Toast

class MyReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
        // This method is called when the BroadcastReceiver is receiving an Intent broadcast.
        // BR의 이름으로 분기
        when (intent.action) {
            "android.intent.action.BOOT_COMPLETED" -> {
                val t1 = Toast.makeText(context,"부팅완료",Toast.LENGTH_SHORT)
                t1.show()
            }
            "android.provider.Telephony.SMS_RECEIVED" -> {
                if (intent.extras != null) {
                    // 문자 메시지 정보 객체를 추출한다.
                    val pduObject = intent.extras?.get("pdus") as Array<Any?>
                    if (pduObject != null) {
                        for (obj in pduObject) {
                            // 문자 메세지 양식 객체를 추출한다.
                            val format = intent.extras?.getString("format")
                            // 문자 메세지 객체를 생성한다.
                            val currentSMS = SmsMessage.createFromPdu(obj as ByteArray?,format)

                            val showMessage = "전화번호 ${currentSMS.displayOriginatingAddress}\n 내뇽 : ${currentSMS.displayMessageBody}"

                            val t1 = Toast.makeText(context,showMessage,Toast.LENGTH_SHORT)
                            t1.show()
                        }
                    }
                }
            }
        }
    }
}

 

메니패스트

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.systemmessage">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.SystemMessage"
        tools:targetApi="31">
        <receiver
            android:name=".MyReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
            <intent-filter>
                <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
            </intent-filter>
        </receiver>

        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
</manifest>