6장. 서비스와 브로드캐스트 리시버

1. SamplePermission

1-1. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

 

1-2. MainActivity.java

public class MainActivity extends AppCompatActivity {

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

        String[] permissions = {
                Manifest.permission.READ_EXTERNAL_STORAGE,
                Manifest.permission.WRITE_EXTERNAL_STORAGE
        };

        checkPermissions(permissions);
    }

    public void checkPermissions(String[] permissions) {
        ArrayList<String> targetList = new ArrayList<String>();

        for (int i = 0; i < permissions.length; i++) {
            String curPermission = permissions[i];
            int permissionCheck = ContextCompat.checkSelfPermission(this, curPermission);
            if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, curPermission + " 권한 있음.", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(this, curPermission + " 권한 없음.", Toast.LENGTH_LONG).show();
                if (ActivityCompat.shouldShowRequestPermissionRationale(this, curPermission)) {
                    Toast.makeText(this, curPermission + " 권한 설명 필요함.", Toast.LENGTH_LONG).show();
                } else {
                    targetList.add(curPermission);
                }
            }
        }

        String[] targets = new String[targetList.size()];
        targetList.toArray(targets);

        ActivityCompat.requestPermissions(this, targets, 101);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case 101: {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(this, "첫번째 권한을 사용자가 승인함.", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(this, "첫번째 권한 거부됨.", Toast.LENGTH_LONG).show();
                }

                return;
            }
        }
    }
}

 

---

2. SampleService

2-1. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="서비스로 보내기"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toTopOf="@+id/button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

 

2-2. MyService.java

public class MyService extends Service {
    private static final String TAG = "MyService";

    public MyService() {}

    @Override
    public void onCreate() {
        super.onCreate();

        Log.d(TAG, "onCreate() 호출됨.");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d(TAG, "onStartCommand() 호출됨.");

        if (intent == null) {
            return Service.START_STICKY;
        } else {
            processCommand(intent);
        }

        return super.onStartCommand(intent, flags, startId);
    }

    private void processCommand(Intent intent) {
        String command = intent.getStringExtra("command");
        String name = intent.getStringExtra("name");
        Log.d(TAG, "command : " + command + ", name : " + name);

        for (int i = 0; i < 5; i++) {
            try {
                Thread.sleep(1000);
            } catch (Exception e) {};

            Log.d(TAG, "Waiting " + i + " seconds.");
        }

        Intent showIntent = new Intent(getApplicationContext(), MainActivity.class);
        showIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
                Intent.FLAG_ACTIVITY_SINGLE_TOP |
                Intent.FLAG_ACTIVITY_CLEAR_TOP);
        showIntent.putExtra("command", "show");
        showIntent.putExtra("name", name + " from service.");
        startActivity(showIntent);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    @Override
    public IBinder onBind(Intent intent) {
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

 

2-3. MainActivity.java

public class MainActivity extends AppCompatActivity {
    EditText editText;

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

        editText = findViewById(R.id.editText);

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String name = editText.getText().toString();

                Intent intent = new Intent(getApplicationContext(), MyService.class);
                intent.putExtra("command", "show");
                intent.putExtra("name", name);
                startService(intent);
            }
        });

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

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

    private void processIntent(Intent intent) {
        if (intent != null) {
            String command = intent.getStringExtra("command");
            String name = intent.getStringExtra("name");
            Toast.makeText(this, "command : " + command + ", name : " + name, Toast.LENGTH_LONG).show();
        }
    }
}

 

---

3. Broadcast Receiver 만들기

3-1. AndroidManifest.xml

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

    <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/Theme.SampleReceiver">

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

        <activity android:name=".SmsActivity"/>

    </application>
</manifest>

 

3-2. activity_sms.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".SmsActivity">

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:ems="10"
        android:hint="발신번호"
        android:inputType="textPersonName"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:gravity="top|left"
        android:hint="내용"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toTopOf="@+id/editText3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editText" />

    <EditText
        android:id="@+id/editText3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:ems="10"
        android:hint="수신시각"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toTopOf="@+id/button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="40dp"
        android:text="확인"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

 

3-3. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

 

3-4. MainActivity.java

public class MainActivity extends AppCompatActivity {

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

        AndPermission.with(this)
                .runtime()
                .permission(Permission.RECEIVE_SMS)
                .onGranted(new Action<List<String>>() {
                    @Override
                    public void onAction(List<String> permissions) {
                        showToast("허용된 권한 갯수 : " + permissions.size());
                    }
                })
                .onDenied(new Action<List<String>>() {
                    @Override
                    public void onAction(List<String> permissions) {
                        showToast("거부된 권한 갯수 : " + permissions.size());
                    }
                })
                .start();
    }

    public void showToast(String message) {
        Toast.makeText(this, message, Toast.LENGTH_LONG).show();
    }
}

 

3-5. SmsReceiver.java (브로드캐스트 리시버)

public class SmsReceiver extends BroadcastReceiver {
    private static final String TAG = "SmsReceiver";

    public SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

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

        Bundle bundle = intent.getExtras();
        SmsMessage[] messages = parseSmsMessage(bundle);
        if (messages != null && messages.length > 0) {
            String sender = messages[0].getOriginatingAddress();
            Log.i(TAG, "SMS sender : " + sender);

            String contents = messages[0].getMessageBody();
            Log.i(TAG, "SMS contents : " + contents);

            Date receivedDate = new Date(messages[0].getTimestampMillis());
            Log.i(TAG, "SMS received date : " + receivedDate.toString());

            sendToActivity(context, sender, contents, receivedDate);
        }
    }

    private SmsMessage[] parseSmsMessage(Bundle bundle) {
        Object[] objs = (Object[]) bundle.get("pdus");

        SmsMessage[] messages = new SmsMessage[objs.length];
        int smsCount = objs.length;
        for (int i = 0; i < smsCount; 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;
    }

    private void sendToActivity(Context context, String sender, String contents, Date receivedDate) {
        Intent myIntent = new Intent(context, SmsActivity.class);
        myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_SINGLE_TOP|Intent.FLAG_ACTIVITY_CLEAR_TOP);
        myIntent.putExtra("sender", sender);
        myIntent.putExtra("contents", contents);
        myIntent.putExtra("receivedDate", format.format(receivedDate));
        context.startActivity(myIntent);
    }
}

 

3-6. SmsActivity.java

public class SmsActivity extends AppCompatActivity {
    EditText editText;
    EditText editText2;
    EditText editText3;

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

        editText = findViewById(R.id.editText);
        editText2 = findViewById(R.id.editText2);
        editText3 = findViewById(R.id.editText3);

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });

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

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

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

            editText.setText(sender);
            editText2.setText(contents);
            editText3.setText(receivedDate);
        }
    }
}

 

3-7. permission 외부 라이브러리로 yanzhenjie 사용