How to send an SMS with Android API 기본 문자앱을 사용하지 않고 문자 보내기

기기가 Android 5.1 API Level 22(Lollipop) 이하를 실행 하거나 앱의 targetSdkVersion이 22 이하인 경우, 아래와 같이 AndroidManifest.xml 파일에만 SEND_SMS(위험 권한)를 요청하면 문자를 보낼 수 있다.

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

그러므로 아래와 같이 간단히 문자를 보내는 코드는 API Level 23(Marshmallow)이전, API Level 22(Lollipop)까지만 가능 하다.

<AndroidManifest.xml>

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

<MainActivity.java>

public class MainActivity extends AppCompatActivity {
 
    EditText editText1;
    EditText editText2;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        editText1 = findViewById(R.id.phoneNumber);
        editText2 = findViewById(R.id.message);
 
        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String phoneNumber = editText1.getText().toString();
                String message = editText2.getText().toString();
 
                try {
                    SmsManager smsManager = SmsManager.getDefault();
                    smsManager.sendTextMessage(phoneNumber, null, message, null, null);
                    Toast.makeText(getApplicationContext(), "Message sent", Toast.LENGTH_SHORT).show();
                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
                    e.printStackTrace();
                }
            }
        });
    }
}

기기가 Android 6.0 API Level 23(Marshmallow) 이상을 실행 하거나 앱의 targetSdkVersion이 23 이상인 경우 앱은 런타임에 사용자로부터 권한을 요청해야 한다. 사용자가 언제든지 권한을 취소할 수 있으므로, 앱이 실행할 때마다 권한을 갖고 있는지 여부를 확인해야 한다.

<AndroidManifest.xml>

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

<MainActivity.java>

public class MainActivity extends AppCompatActivity {
 
    private final int MY_PERMISSION_REQUEST_SMS = 1001;
 
    EditText editText1;
    EditText editText2;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.SEND_SMS)) {
                // Android provides a utility method, shouldShowRequestPermissionRationale(), that returns true if the user has previously
                // denied the request, and returns false if a user has denied a permission and selected the Don't ask again option in the
                // permission request dialog, or if a device policy prohibits the permission. If a user keeps trying to use functionality that
                // requires a permission, but keeps denying the permission request, that probably means the user doesn't understand why
                // the app needs the permission to provide that functionality. In a situation like that, it's probably a good idea to show an
                // explanation.
 
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("info");
                builder.setMessage("This app won't work properly unless you grant SMS permission.");
                builder.setIcon(android.R.drawable.ic_dialog_info);
 
                builder.setNeutralButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        ActivityCompat.requestPermissions(MainActivity.this, new String[] {Manifest.permission.SEND_SMS}, MY_PERMISSION_REQUEST_SMS);
                    }
                });
 
                AlertDialog dialog = builder.create();
                dialog.show();
            } else {
                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.SEND_SMS}, MY_PERMISSION_REQUEST_SMS);
            }
        }
 
        editText1 = findViewById(R.id.phoneNumber);
        editText2 = findViewById(R.id.message);
 
        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String phoneNumber = editText1.getText().toString();
                String message = editText2.getText().toString();
 
                try {
                    SmsManager smsManager = SmsManager.getDefault();
                    smsManager.sendTextMessage(phoneNumber, null, message, null, null);
                    Toast.makeText(getApplicationContext(), "Message sent", Toast.LENGTH_SHORT).show();
                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
                    e.printStackTrace();
                }
            }
        });
    }
 
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSION_REQUEST_SMS: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(this,"Permission granted.",Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(this,"Permission denied.",Toast.LENGTH_SHORT).show();
                }
            }
        }
    }
}

 

2018년 11월 1일 이후로 구글 플레이에서는 위 예제와 같이 SMS 및 Call Log 권한을 요청하는 앱을 삭제하고 등록을 막기 시작했다.

Reminder SMS/Call Log Policy Changes

※참고

Permissions overview