open coding- 시스템 메시지- broadCastreceiver 이용 ex)부팅완료 Toast로 띄우기 / 수신메세지 Toast로 띄우기

부팅완료 Toast로 띄우기 / 수신메세지 Toast로 띄우기

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.systembr">
    <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"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <receiver
            android:name=".SystemReceiver"
            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">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<!-----------------------------------위에 추가한 사항-
권한등록
<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"/>

receiver 이름등록(os가 지정한)
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
 <intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED"/>
</intent-filter>

------------------------------------------->

<BroadSystemReciver> -broadCastReceiver class

package com.example.systembr;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.nfc.Tag;
import android.os.Bundle;
import android.os.strictmode.SqliteObjectLeakedViolation;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;

import static android.widget.Toast.LENGTH_SHORT;

public class SystemReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.

        //receiver 이름으로 분기
        // 3. 하나의 리시버에서 다중의 메세지를 처리하려면 분기별로 나눠야하는데, 그 정보는 intent가지고 있음..

        switch (intent.getAction()) {
            case "android.intent.action.BOOT_COMPLETED" :
                Toast t1 = Toast.makeText(context,"부팅완료", LENGTH_SHORT);
                t1.show();
                break;  // swtich구문은 case별로 break; 해야함
            case "android.provider.Telephony.SMS_RECEIVED" :

                                //문자 메세지 정보 가지고 있는 객체 추출
                Bundle bundle = intent.getExtras();
                if(bundle != null){
                    //메세지 정보객체 이용해 SmsMessage 객체 생성
                    Object [] obj = (Object[]) bundle.get("pdus");
                    SmsMessage [] msg = new SmsMessage[obj.length];
                    for(int i=0 ; i < obj.length; i++){
                        msg[i] = SmsMessage.createFromPdu((byte[])obj[i]);
                        }
                    //문자메세지 정보 추출
                    for (SmsMessage a1 : msg){
                         String number = a1.getOriginatingAddress(); //발신자 번호
                         String str = a1.getMessageBody();
                         String a2 = number +":"+ str;
                         Toast t2 = Toast.makeText(context, a2, LENGTH_SHORT);
                         t2.show();
                                 }
                   }break;
           }//swtich fnish
       }//@override onReceive finish

}

<MainActivity> class

package com.example.systembr;

import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {
                        //메세지는 권한체크여부 띄어야함
    //확인받을 권한
    String [] permission_list = {
                                Manifest.permission.READ_PHONE_STATE,
                                Manifest.permission.RECEIVE_SMS
                        };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //check 적용
        checkPermission();

    }//finish

//check 여부method
    public void checkPermission(){
        if(Build.VERSION.SDK_INT < Build.VERSION_CODES.M){  //android 8.0기준
            return;     //이전버전에는 권한체크기능 없으.
        }
        for(String permission : permission_list) {
            int chk = checkCallingOrSelfPermission(permission);
            if(chk == PackageManager.PERMISSION_DENIED) {
                requestPermissions(permission_list, 0);
                break;
            }
        }//for문 finish
    }//checkPermission finish -> check 적용 ㄱㄱ


}