GCM 구현2 - 서버

 

 

안드로이드 : http://ghj1001020.tistory.com/783?category=719597

서버 : http://ghj1001020.tistory.com/784?category=756570

 

 

가이드 : https://developers.google.com/cloud-messaging/http

 

1. 앱은 GCM 토큰을 가져와서 앱에 저장합니다

2. 서버에서 앱에 저장된 GCM 토큰을 사용하여 메시지를 요청합니다

3. 앱이 GCM 메시지 수신하고 알림을 띄웁니다

* 테스트 용도 이므로 토큰을 서버에 저장하는 부분은 제외했습니다. (서버에서는 디바이스의 GCM 토큰을 하드코딩해서 보냅니다)

 

 

1. gcm-server 라이브러리 이용

 

pom.xml

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        <!-- GCM -->
        <!-- https://mvnrepository.com/artifact/com.google.gcm/gcm-server -->
        <dependency>
            <groupId>com.google.gcm</groupId>
            <artifactId>gcm-server</artifactId>
            <version>1.0.0</version>
        </dependency>
cs

* 라이브러리 jar 파일을 받아서 사용하실때는 json-simple 라이브러리도 필요합니다

* https://github.com/google/gcm/tree/master/client-libraries/java/rest-client/src/com/google/android/gcm/server

 

 

GcmSender.java

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    //GCM Url
    private final String GCM_URL = "https://gcm-http.googleapis.com/gcm/send";
 
    ...
 
    //GCM 전송 - 라이브러리 사용
    public void gcmSend(Map<String, String> datas) {
        Message.Builder builder = new Message.Builder();
        builder.delayWhileIdle(true);    //기기가 절전 상태에서도 수신될지 여부
        builder.timeToLive(60*1000);    //기기가 비활성화 상태일때 메시지 유효시간 (초)
        builder.collapseKey(UUID.randomUUID().toString());    //중복메시지도 전송될 수 있도록 고유키 생성
        //데이터 추가
        builder.addData( "title", datas.get("title") );
        builder.addData( "body", datas.get("body") );
 
        //메시지 생성
        Message message = builder.build();
        
        //단말 토큰 리스트 
        ArrayList<String> registIdList = new ArrayList<>();
        registIdList.add(REG_ID);
                
        try {
            Sender sender = new Sender(SERVER_KEY);
            MulticastResult multiResult = sender.send(message, registIdList, 1);    //retry 1회
            List<Result> resultList = multiResult.getResults();
            //결과출력 
            for( Result result : resultList ) {
                if( result.getMessageId() != null ) {
                    //성공
                    System.out.println("Success");
                }
                else {
                    //실패
                    System.out.println("Fail : "+result.getErrorCodeName());
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
cs

* SERVER_KEY(서버키) 와 REG_ID(토큰) 는 각자 테스트 하시는 걸로 사용합니다

 

 

2. HttpsURLConnection 사용

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    //GCM 전송 - HttpsUrlConnection 사용
    public void gcmSendUrl(Map<String, String> datas) {
        try {
            URL url = new URL(GCM_URL);
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setRequestProperty("Authorization", "key="+SERVER_KEY);
            conn.setRequestProperty("Content-Type", "application/json; UTF-8");
            
            conn.setRequestMethod("POST");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            
            JSONObject jsonMsg = new JSONObject();
            jsonMsg.put( "title", datas.get("title") );
            jsonMsg.put( "body", datas.get("body") );
            
            JSONObject json = new JSONObject();
            json.put("to", REG_ID);
            json.put("delay_while_idle", true);
            json.put("data", jsonMsg);
 
            System.out.println("Param : "+json.toString());
            
            conn.setRequestProperty("Content-Length", String.valueOf(json.toString().length()));
            
            //보내기
            OutputStreamWriter osw = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
            osw.write(json.toString());
            osw.flush();
            osw.close();
 
            //받기
            BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
             
            StringBuffer strBuf = new StringBuffer();
            String inputLine;
            while((inputLine = in.readLine()) != null) { // response 출력
                strBuf.append(inputLine);
            }
            
            in.close();
            conn.disconnect();    
            
            //결과
            if(!strBuf.toString().isEmpty()) {
                System.out.println("Result : "+strBuf.toString());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
cs

 

 

main

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    public static void main(String[] args) {
        GcmSender gcmSender=  new GcmSender();
        //데이터
        Map<String, String> datas = new HashMap<>();
        datas.put("title", "GCM 테스트");
        datas.put("body", "GCM 테스트 중입니다.");
        
        gcmSender.gcmSend(datas);
//        gcmSender.gcmSendUrl(datas);
    }
cs

* title과 body 처럼 어떤 키-값으로 보낼지는 클라이언트와 미리 약속이 되어 있어야 합니다

 

 

결과

* 서버에서 전송한 GCM 메시지를 안드로이드에서 수신하여 알림으로 띄웠습니다

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GCM 구현1 - Android

 

 

안드로이드 : http://ghj1001020.tistory.com/783?category=719597

서버 : http://ghj1001020.tistory.com/784?category=756570

 

 

가이드 : https://developers.google.com/cloud-messaging/android/client

 

1. 앱은 GCM 토큰을 가져와서 앱에 저장합니다

2. 서버에서 앱에 저장된 GCM 토큰을 사용하여 메시지를 요청합니다

3. 앱이 GCM 메시지 수신하고 알림을 띄웁니다

* 테스트 용도 이므로 토큰을 서버에 저장하는 부분은 제외했습니다. (서버에서는 디바이스의 GCM 토큰을 하드코딩해서 보냅니다)

 

 

build.gradle
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dependencies {
    ...
    //gcm
    implementation 'com.google.android.gms:play-services-gcm:11.8.0'
}
cs

 

 

AndroidManifest.xml

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    <uses-permission android:name="android.permission.WAKE_LOCK" />
    
 
    <application>
 
        ...
        <!-- GCM -->
        <!-- GCM으로 부터 message를 받을 수 있도록 권한선언 -->
        <receiver android:name="com.google.android.gms.gcm.GcmReceiver"
            android:exported="true"
            android:permission="com.google.android.c2dm.permission.SEND">
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
 
                <category android:name="com.ghj.gcmex" />
            </intent-filter>
        </receiver>
 
        <!-- 등록 토큰 생성 및 업데이트 처리 -->
        <service android:name=".gcm.MyInstanceIDService"
            android:exported="false">
            <intent-filter>
                <action android:name="com.google.android.gms.iid.InstanceID" />
            </intent-filter>
        </service>
 
        <!-- 메시지 수신처리 -->
        <service android:name=".gcm.MyGcmListenerService"
android:exported="false">
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
            </intent-filter>
        </service>
 
        <!-- 토큰 가져오기 -->
        <service android:name=".gcm.RegistrationIntentService"
            android:exported="false" />
 
    </application>

cs

* 메시지 수신할 때 절전모드를 유지하기위해 WAKE_LOCK 권한을 줍니다

* com.google.android.gms.gcm.GcmReceiver 은 GCM으로부터 메시지를 받는 리시버입니다

 

 

MyInstanceIDService.java

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public class MyInstanceIDService extends InstanceIDListenerService {
 
 
    //등록 토큰이 업데이트 되면 호출된다
    @Override
    public void onTokenRefresh() {
        Intent intent = new Intent(this, RegistrationIntentService.class);
        startService(intent);
    }
}
cs

* GCM 토큰이 업데이트 되면 호출되는 서비스 입니다

* 토큰을 가져와서 앱에 저장하기 위해 RegistrationIntentService 서비스를 호출합니다

 

 

RegistrationIntentService.java

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//IntentService : 작업을 수행하는 스레드를 별도로 생성 , stopService도 자동적으로 호출
public class RegistrationIntentService extends IntentService {
 
    private static final String TAG = "RegistIntentService";
 
    public RegistrationIntentService()
    {
        super( TAG );
    }
 
 
    //서비스 시작시 호출
    @Override
    protected void onHandleIntent(@Nullable Intent intent)
    {
        String senderId = getString(R.string.gcm_sender_id);
 
        try {
            synchronized ( TAG ) {
                //토큰 가져와서 앱에 저장
                InstanceID instanceID = InstanceID.getInstance(this);
                String token = instanceID.getToken( senderId , GoogleCloudMessaging.INSTANCE_ID_SCOPE , null);
 
                Log.d("GCM_Token" , token);
                saveGcmToken(token);
            }
        } catch ( Exception e ) {
            e.printStackTrace();
        }
    }
 
    //shared preferences 에 토큰 저장
    public void saveGcmToken(String token) {
        SharedPreferences pref = getSharedPreferences(getString(R.string.pref_gcm_token) , Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = pref.edit();
        editor.putString(getString(R.string.pref_key_gcm_token) , token);
        editor.commit();
    }
}
cs

* GCM 토큰을 가져와서 앱에 저장하는 서비스 입니다

 

 

MyGcmListenerService.java

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public class MyGcmListenerService extends GcmListenerService {
 
    private final String TAG = "MyGcmListenerService";
 
    //알림
    private final String GCM_DATA_KEY_TITLE = "title";
    private final String GCM_DATA_KEY_BODY = "body";
    private static int NOTIFICATION_ID = 0;
    private final long[] ALARM_PATTERN = new long[]{ 100, 100, 100, 100 };
 
 
    //메시지 수신시 호출
    @Override
    public void onMessageReceived(String s, Bundle bundle) {
        //메시지 수신 후 알림 띄우기
        if( bundle != null ) {
            Log.d(TAG, "onMessageReceived : "+bundle.toString());
 
            String title = bundle.getString(GCM_DATA_KEY_TITLE , "");
            String body = bundle.getString(GCM_DATA_KEY_BODY , "");
            sendNotificaion(title , body);
        }
    }
 
    //알림에 띄우기
    public void sendNotificaion(String title, String body) {
        NotificationManager notiManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
 
        String chGroupId = getString(R.string.alarm_ch_group_id_gcm);
        String channelId = getString(R.string.alarm_ch_id_gcm);
        //26 오레오 이상
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            if( !checkNotificationChannelGroup(chGroupId) ) {
                //알림 채널 그룹
                NotificationChannelGroup notiGroup = new NotificationChannelGroup( chGroupId, getString(R.string.alarm_ch_group_name_gcm) );
                notiManager.createNotificationChannelGroup( notiGroup );
            }
 
            if( !checkNotificationChannel(channelId) ) {
                //알림 채널
                NotificationChannel notiChannel = new NotificationChannel(channelId, getString(R.string.alarm_ch_name_gcm), NotificationManager.IMPORTANCE_HIGH);
                notiChannel.setGroup(chGroupId);
                notiChannel.enableLights(true);
                notiChannel.setLightColor(Color.GREEN);
                notiChannel.enableVibration(true);
                notiChannel.setVibrationPattern( ALARM_PATTERN );
                notiChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
                notiChannel.setShowBadge(true);
                notiManager.createNotificationChannel(notiChannel);
            }
        }
 
        //알림 생성
        String appName = getString(R.string.app_name);
 
        Intent intent = new Intent(this, MainActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent pi = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);   //이미 존재할 경우 이를 유지하고 추가 데이터만 새로운 Intent에 있는 것으로 대체
 
        NotificationCompat.Builder noti = new NotificationCompat.Builder(this, channelId);
        noti.setAutoCancel(true);   //클릭시 알림 제거
        noti.setContentTitle(title);
        noti.setContentText(body);
        noti.setTicker(appName);
        noti.setSmallIcon(R.mipmap.ic_launcher);
        noti.setContentIntent(pi);
        noti.setVibrate( ALARM_PATTERN );
        noti.setSound( RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION) );
        noti.setOngoing(false);  //지우기 버튼으로 삭제 (true - 일반 알림 위에 정렬, 지우기 버튼으로 삭제 못함)
        noti.setOnlyAlertOnce(true);    //알림이 아직 표시되지 않은 경우 사운드, 진동, 티커만 재생되도록
        noti.setWhen( System.currentTimeMillis() ); //알림에서 보여지는 발생시간
        noti.setNumber(1);  //알림의 오른쪽 번호
        noti.setGroupSummary(true);
 
        if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ) {
            noti.setVisibility( Notification.VISIBILITY_SECRET );   //보안화면에서 알림 보이지 않음
        }
 
        try {
            notiManager.notify(NOTIFICATION_ID++ , noti.build() );
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    //notification channel group 등록 체크
    public boolean checkNotificationChannelGroup(String groupId) {
        boolean result = false; //true : 이미 등록됨 , false : 미등록
 
        if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ) {
            NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
            List<NotificationChannelGroup> groups = notificationManager.getNotificationChannelGroups();
 
            if( groups != null && groups.size() > 0 ) {
                for ( NotificationChannelGroup group : groups ) {
                    if( groupId.equalsIgnoreCase(group.getId()) ) {
                        result = true;
                        break;
                    }
                }
            }
        }
 
        return result;
    }
 
    //notification channel 등록 체크
    public boolean checkNotificationChannel( String channelId ) {
        if( Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ) {
            NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
            return notificationManager.getNotificationChannel(channelId) != null ? true : false;
        }
 
        return false;
    }
}
 
cs

* GCM 메시지를 수신한 후 알림을 띄웁니다

* GCM 메시지 수신이 되면 onMessageReceived 함수가 호출됩니다

 

 

MainActivity.java

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public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        getGcmToken();
    }
 
    //token 가져오기
    public void getGcmToken(){
        SharedPreferences pref = getSharedPreferences(getString(R.string.pref_gcm_token) , Context.MODE_PRIVATE);
        String token = pref.getString(getString(R.string.pref_key_gcm_token), "");
 
        if( TextUtils.isEmpty(token) ) {
            Intent intent = new Intent( this, RegistrationIntentService.class );
            startService( intent );
        }
        else {
            Log.d("GCM_Token", token);
        }
    }
}
cs

* MainActivity 시작시 GCM 토큰이 없으면 GCM 토큰을 가져오는 서비스를 시작합니다

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BarcodeScanner.zip


Google의 Mobile Vision을 이용한 바코드 스캐너 만들기



레퍼런스 : https://developers.google.com/android/reference/com/google/android/gms/vision/package-summary

샘플 : https://github.com/googlesamples/android-vision/tree/master/visionSamples/barcode-reader

 

* 샘플에 나와있는 소스를 기반으로 작업하지만 일부는 커스텀을 합니다

* android.hardware.Camera가 21부터 deprecated 되었지만 샘플에서 사용하므로 그대로 사용합니다

 

 

build.gradle
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dependencies {
    ...
 
    implementation 'com.google.android.gms:play-services-vision:9.8.0'
}
cs

* 구글플레이 서비스를 이용합니다 (만약 인터넷이 되지 않아 라이브러리를 다운받지 못하면 이용할 수 없습니다.)

 

 

AndroidManifest.xml

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    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.CAMERA" />
 
    <uses-feature android:name="android.hardware.camera" android:required="false"/>
    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false"/>
cs

* 카메라 권한이 필요합니다

 

 

BarcodeActivity.java

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package com.ghj.scanner;
 
import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.VibrationEffect;
import android.os.Vibrator;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.Toast;
 
import com.ghj.scanner.barcode.BarcodeGraphic;
import com.ghj.scanner.barcode.BarcodeGraphicTracker;
import com.ghj.scanner.barcode.BarcodeTrackerFactory;
import com.ghj.scanner.barcode.CameraSource;
import com.ghj.scanner.barcode.CameraSourcePreview;
import com.ghj.scanner.barcode.GraphicOverlay;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.vision.MultiProcessor;
import com.google.android.gms.vision.barcode.Barcode;
import com.google.android.gms.vision.barcode.BarcodeDetector;
 
import java.io.IOException;
 
public class BarcodeActivity extends AppCompatActivity implements BarcodeGraphicTracker.BarcodeUpdateListener {
 
    //permission
    final private int PERM_REQUEST_CAMERA = 1000;
 
    //ui
    private CameraSource mCameraSource;
    private CameraSourcePreview mPreview;
    private GraphicOverlay<BarcodeGraphic> mGraphicOverlay;
    private FrameLayout boxBarcodeScan;
 
    //상수
    final private String MSG_FAIL_PERM = "카메라 권한이 없습니다";
    final private String MSG_FAIL_LIB = "라이브러리 구동에 실패했습니다";
    final private String MSG_FAIL_CAMERA = "카메라 열기에 실패했습니다";
    final private long[] VIBRATE_PATTERN = { 0, 70, 10, 40 };    //진동패턴
 
    //플래그
    private boolean isFail = false; //실패여부
    private boolean mBarcodeGrant = false;
 
    //진동
    Vibrator vibrator;
 
 
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags( WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView( R.layout.activity_barcode );
 
        mPreview = (CameraSourcePreview)findViewById(R.id.preview);
        mGraphicOverlay = (GraphicOverlay<BarcodeGraphic>)findViewById(R.id.graphicOverlay);
        boxBarcodeScan = (FrameLayout)findViewById(R.id.boxBarcodeScan);
 
        checkPermission();
        if( mBarcodeGrant ) {
            startBarcode();
        }
 
        vibrator = (Vibrator)getSystemService(VIBRATOR_SERVICE);
    }
 
    @Override
    protected void onResume() {
        super.onResume();
 
        if( !isFail ) {
            checkPermission();
 
            if( mBarcodeGrant ) {
                restartPreview();
            }
            else {
                requestPermission();
            }
        }
    }
 
    @Override
    protected void onPause() {
        super.onPause();
 
        if( mPreview != null ) {
            mPreview.stop();
        }
    }
 
    @Override
    protected void onDestroy() {
        onFinish();
 
        super.onDestroy();
    }
 
    //권한 체크
    public void checkPermission() {
        if(Build.VERSION.SDK_INT > 22) {
            if( ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ) {
                mBarcodeGrant = false;
                return;
            }
        }
        mBarcodeGrant = true;
    }
 
    //권한 요청
    public void requestPermission() {
        if(Build.VERSION.SDK_INT > 22) {
            String[] perm = new String[]{Manifest.permission.CAMERA};
            requestPermissions(perm, PERM_REQUEST_CAMERA);
        }
    }
 
    //구글플레이 체크
    public boolean checkGooglePlay() {
        int code = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(getApplicationContext());
        if (code != ConnectionResult.SUCCESS) {
            return false;
        }
        return true;
    }
 
 
 
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if( requestCode == PERM_REQUEST_CAMERA ) {
            if( grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //권한획득 성공
                mBarcodeGrant = true;
                startBarcode();
            }
            else {
                onFailDialog( MSG_FAIL_PERM );
            }
        }
    }
 
    //바코드 시작
    public void startBarcode() {
        if( mBarcodeGrant ) {
            if( checkGooglePlay() ) {
                if( !createCameraSource() ) {
                    //라이브러리 없음
                    onFailDialog( MSG_FAIL_LIB );
                }
            }
            else {
                //구글플레이 서비스 실패
                onFailDialog( MSG_FAIL_LIB );
            }
        }
    }
 
    //카메라 객체 생성
    private boolean createCameraSource() {
        Context context = getApplicationContext();
        boolean autoFocus = true;
        boolean useFlash = false;
 
 
        //모든 바코드 검색
        BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(this).build();
        BarcodeTrackerFactory barcodeFactory = new BarcodeTrackerFactory(mGraphicOverlay, this);
        barcodeDetector.setProcessor(new MultiProcessor.Builder<>(barcodeFactory).build());
 
        //필요한 라이브러리를 다운받아서 사용할 수 있는지 여부
        if (!barcodeDetector.isOperational()) {
            return false;
        }
 
        CameraSource.Builder builder = new CameraSource.Builder(getApplicationContext(), barcodeDetector)
                .setFacing( CameraSource.CAMERA_FACING_BACK)
                .setRequestedPreviewSize(1920, 1080)
                .setRequestedFps(15.0f)
                .setFocusMode(autoFocus ? Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE : null)
                .setFlashMode(useFlash ? Camera.Parameters.FLASH_MODE_TORCH : null);
 
        mCameraSource = builder.build();
        return true;
    }
 
    //카메라 프리뷰
    private void restartPreview() throws SecurityException {
        if (mCameraSource != null) {
            try {
                mPreview.start(mCameraSource, mGraphicOverlay);
            } catch (IOException e) {
                e.printStackTrace();
                //카메라 열다가 실패
                onFailDialog( MSG_FAIL_CAMERA );
            }
        }
    }
 
    //바코드 인식됨
    @Override
    public void onBarcodeDetected(Barcode barcode) {
        try {
            if( Build.VERSION.SDK_INT >= 26 )
            {
                VibrationEffect vibrationEffect = VibrationEffect.createWaveform(VIBRATE_PATTERN, -1);
                vibrator.vibrate(vibrationEffect);
            }
            else
            {
                vibrator.vibrate(VIBRATE_PATTERN, -1);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
 
        final Barcode result = barcode;
        AsyncTask.execute(new Runnable() {
            @Override
            public void run() {
                mPreview.stop();
 
                new Handler(getMainLooper()).postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(getApplicationContext(), result.displayValue, Toast.LENGTH_SHORT).show();
 
                        Intent intent = new Intent();
                        intent.putExtra( "BARCODE_NUMBER", result.displayValue);
 
                        setResult(RESULT_OK, intent);
 
                        onFinish();
                        finish();
                    }
                }, 1000);
            }
        });
    }
 
    //바코드 해제
    public void onFinish() {
        if( mPreview != null ) {
            mPreview.release();
            mPreview = null;
        }
 
        if( mCameraSource != null ) {
            mCameraSource.release();
            mCameraSource = null;
        }
    }
 
 
    //바코드 인식 실패 다이얼로그
    public void onFailDialog(String message) {
        isFail = true;
 
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(message)
                .setPositiveButton("확인", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        onFinish();
                        finish();
                    }
                });
        builder.show();
    }
}
 
cs

* 바코드 인식을 성공하면 화면이 멈추고 1초후 바코드 번호를 넘깁니다

* 바코드 인식을 할 수 없으면 alert가 뜨고 클릭하면 이전화면으로 이동합니다

 

 

activity_barcode.xml

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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <com.ghj.scanner.barcode.CameraSourcePreview
        android:id="@+id/preview"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
 
        <com.ghj.scanner.barcode.GraphicOverlay
            android:id="@+id/graphicOverlay"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </com.ghj.scanner.barcode.GraphicOverlay>
 
    </com.ghj.scanner.barcode.CameraSourcePreview>
 
 
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <TextView
            android:text="바코드를 스캔하세요"
            android:textColor="#ffffff"
            android:textSize="16dp"
            android:layout_marginTop="54dp"
            android:layout_centerHorizontal="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <FrameLayout
            android:id="@+id/boxBarcodeScan"
            android:layout_centerInParent="true"
            android:layout_width="@dimen/scan_area_width"
            android:layout_height="@dimen/scan_area_height" />
    </RelativeLayout>
 
</RelativeLayout>
 
 
cs

* RelativeLayout에 카메라가 보여지는 화면을 추가하고 그위에 뷰들을 올림으로써 커스텀할 수 있습니다

 

 

CameraSourcePreview.java

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    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        //카메라 프리뷰 화면을 xml에서 정한 전체화면으로 합니다
        int width = right - left;
        int height = bottom - top;
//        int width = 320;
//        int height = 240;
//        if (mCameraSource != null) {
//            Size size = mCameraSource.getPreviewSize();
//            if (size != null) {
//                width = size.getWidth();
//                height = size.getHeight();
//            }
//        }
//
//        // Swap width and height sizes when in portrait, since it will be rotated 90 degrees
//        if (isPortraitMode()) {
//            int tmp = width;
//            //noinspection SuspiciousNameCombination
//            width = height;
//            height = tmp;
//        }
        ...
    }
cs

* 저는 카메라 프리뷰를 전체화면에 그대로 보여줍니다. 비율을 변경하지 않습니다

 

 

GraphicOverlay.java

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    @Override
    protected void onDraw(Canvas canvas) {
 
        super.onDraw(canvas);
 
        synchronized (mLock) {
            if ((mPreviewWidth != 0) && (mPreviewHeight != 0)) {
                mWidthScaleFactor = (float) canvas.getWidth() / (float) mPreviewWidth;
                mHeightScaleFactor = (float) canvas.getHeight() / (float) mPreviewHeight;
            }
 
            for (Graphic graphic : mGraphics) {
                graphic.draw(canvas);
            }
 
            //todo 바깥의 dim 처리
            Paint paint = new Paint();
            paint.setColor(Color.parseColor("#AA000000"));
            paint.setStrokeWidth(1f);
 
            Path path = new Path();
            path.moveTo(0, 0);
            path.lineTo(mPreviewWidth, 0);
            path.lineTo(mPreviewWidth, mPreviewHeight);
            path.lineTo(0, mPreviewHeight);
            path.lineTo(0 , 0);
 
            if( scanRect != null ) {
                path.moveTo(scanRect.left, scanRect.top);
                path.lineTo(scanRect.left, scanRect.bottom);
                path.lineTo(scanRect.right, scanRect.bottom);
                path.lineTo(scanRect.right, scanRect.top);
                path.lineTo(scanRect.left, scanRect.top);
            }
 
            canvas.drawPath(path, paint);
        }
    }
cs

* Dim처리하는 부분입니다

* activitiy_barcode.xml에서 background 속성을 이용하여 배경을  dim처리 해도 됩니다

 

 

결과

* 바코드를 스캔한 모습입니다



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