안드로이드 스튜디오 문자 받기, 문자 전송하기

1. app(오른쪽클릭) -> new -> other -> BroadCast Receiver 추가

 

2.manifest 폴더에 AndroidManifest.xml에서 다음과 같이 추가하기

    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.SEND_SMS" />
    
    <receiver
            android:name=".SmsReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="1">
                <action android:name="android.provider.Telephony.SMS_RECEIVED" />
            </intent-filter>
        </receiver>

receiver는 이미 추가되며, intent-filter를 추가해야함

 

3. 권한 요청

private final int SMS_RECEIVE_PERMISSON = 1;
public void checkPermission() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.SEND_SMS)) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SEND_SMS}, SMS_RECEIVE_PERMISSON);
        } else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SEND_SMS}, SMS_RECEIVE_PERMISSON);
        }

        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.RECEIVE_SMS)) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECEIVE_SMS}, SMS_RECEIVE_PERMISSON);
        } else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECEIVE_SMS}, SMS_RECEIVE_PERMISSON);
        }
    }

안드로이드 권한요청하지 않으면 메시지를 주고 받을 수 없습니다!! 꼭 넣어주세요

 

4. Receiver

문자 메시지가 오면 리시버에서 호출을 받아서 처리해줍니다.

public class SmsReceiver extends BroadcastReceiver {
    private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(SMS_RECEIVED)) {
            Bundle bundle = intent.getExtras();
            SmsMessage[] messages = parseSmsMessage(bundle);

            if (messages.length > 0) {
                String content = messages[0].getMessageBody();
                sendToActivity(context, content);
            }
        }
    }

    private void sendToActivity(Context context, String content) {
        Intent intent = new Intent(context, SmsActivity.class); // Flag 설정
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP); // 메세지의 내용을 Extra에 넣어줌
        intent.putExtra("content", content);
        context.startActivity(intent);
    }

    private SmsMessage[] parseSmsMessage(Bundle bundle) {
        Object[] objs = (Object[]) bundle.get("pdus");
        SmsMessage[] messages = new SmsMessage[objs.length];
        for (int i = 0; i < objs.length; i++) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                String format = bundle.getString("format");
                messages[i] = SmsMessage.createFromPdu((byte[]) objs[i], format);
            } else {
                messages[i] = SmsMessage.createFromPdu((byte[]) objs[i]);
            }
        }
        return messages;
    }
}

 

5. 문자 보내기 부분

public class SmsActivity extends AppCompatActivity {
    private EditText Phonenumber;
    private String sms;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        init();
        get_intent();
        sendMsg();
    }

    public void sendMsg() {
        try {
            String phonenumber = Phonenumber.getText().toString();
            if (sms.indexOf("인증번호") != -1) {
                SmsManager smsManager = SmsManager.getDefault();
                smsManager.sendTextMessage("+82" + phonenumber, null, sms, null, null);
                Toast.makeText(getApplicationContext(), "전송 완료", Toast.LENGTH_LONG).show();
            }
        } catch (Exception e) {
            Toast.makeText(getApplicationContext(), "전송 실패", Toast.LENGTH_LONG).show();
            e.printStackTrace();
        }
        finish();
    }

    public void init() {
        setContentView(R.layout.activity_main);
        Phonenumber = (EditText) findViewById(R.id.Phonenumber);
    }

    public void get_intent() {
        Intent intent = getIntent();
        sms = intent.getStringExtra("content");
    }
}

저는 인증번호가 포함된 문자만 전달하게 만들었습니다.

 

Git Hub

Heydosomething/Android_SMS_Receive_Send (github.com)

Heydosomething/Android_SMS_Receive_Send