SMS Receiver

* SmsReceiver.java : New > Other > Brodcast Receiver(AndroidManifest.xml에 Receiver로 등록됨)

public class SmsReceiver extends BroadcastReceiver {

    private static final String TAG = "SmsReceiver";

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG, "onReceiver 호출됨");

        Bundle bundle = intent.getExtras();
        SmsMessage[] messages = parseSmsMessage(bundle);

        if (messages != null && messages.length > 0) {
            String sender = messages[0].getOriginatingAddress();
            String contents = messages[0].getMessageBody();

            Log.d(TAG, "sender : " + sender + ", contents : " + contents);

            sendToActivity(context, sender, contents);
        }
    }

    public void sendToActivity(Context context, String sender, String contents) {
        Intent intent = new Intent(context, SmsActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_SINGLE_TOP);
        intent.putExtra("sender", sender);
        intent.putExtra("contents", contents);

        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) { // SDK 23 이후
                String format = bundle.getString("format");
                messages[i] = SmsMessage.createFromPdu((byte[]) objs[i], format);
            } else {
                messages[i] = SmsMessage.createFromPdu((byte[]) objs[i]);
            }
        }

        return messages;
    }

}

* AndroidManifest.xml

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

<receiver
	android:name=".SmsReceiver"
	android:enabled="true"
	android:exported="true">

	<intent-filter>
		<action android:name="android.provider.Telephony.SMS_RECEIVED" />
	</intent-filter>
</receiver>

* SmsActivity.java

public class SmsActivity extends AppCompatActivity {

    TextView textView2;
    TextView textView3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sms);

        textView2 = findViewById(R.id.textView2);
        textView3 = findViewById(R.id.textView3);

        Intent intent = getIntent();
        processIntent(intent);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);

        processIntent(intent);
    }

    public void processIntent(Intent intent) {
        if (intent != null) {
            String sender = intent.getStringExtra("sender");
            String contents = intent.getStringExtra("contents");

            textView2.setText(sender);
            textView3.setText(contents);
        }
    }

}

* activity_sms.xml : SMS 수신화면

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

    <TextView
        android:id="@+id/textView"
        android:textSize="30dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="수신한 문자 메시지" />

    <TextView
        android:id="@+id/textView2"
        android:textSize="30sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="발신번호" />

    <TextView
        android:id="@+id/textView3"
        android:textSize="20sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="문자내용" />

</LinearLayout>