고 투 더 멘토

Intent.ACTION_SEND를 이용하여 Email, MMS 앱에 파라메터를 번들형태로 넘겨서 해당 액티비티를 호출하는 것이 가능하다.

Email의 경우 아래와 같이 하면 된다.

Intent i=new Intent(Intent.ACTION_SEND); 

i.addCategory(Intent.CATEGORY_DEFAULT); 

// for EMail
// mimetype

i.setType("text/plain");
i.putExtra(Intent.EXTRA_SUBJECT, "제목입니다."); 

i.putExtra(Intent.EXTRA_TEXT, "본문이구요 ....");

i.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{"user1@website.com"}); 

i.putExtra(Intent.EXTRA_CC, new String[]{"user_cc1@website.com", user_cc2@website.com"}); 

i.putExtra(Intent.EXTRA_BCC, new String[]{"user_bcc1@website.com"}); 

// 파일 첨부
i.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/mic_rec3.wav"));

// 앱선택 박스를 띄움.

startActivity(Intent.createChooser(i, "How do you want to send message?"));

// for MMS

i.putExtra("address", "07011111111;01022222222");

i.putExtra("exit_on_sent", true);

i.putExtra("sms_body", "MMS 테스트입니다."); 

startActivity(Intent.createChooser(i, "How do you want to send message?"));

앱선택박스를 띄우지 않고 바로 특정 앱(MMS, GMail)으로 바로 연결되도록 하려면 해당하는 액티비티 Component를 Intent에 등록하면 된다.

// com.google.android.gm 패키지의 ComposeActivityGmail 액티비티를 명시적으로 기입해도 될듯~!

i.setComponent(new ComponentName("com.google.android.gm","com.google.android.gm.ComposeActivity"));

open_src/system/core/adb가 윈도우용으로 빌드될 때 아래의 소스들이 컴파일된다.
 usb_windows.c
 get_my_path_windows.c
 adb.c 
 console.c 
 transport.c 
 transport_local.c 
 transport_usb.c 
 commandline.c 
 adb_client.c 
 sockets.c 
 services.c 
 file_sync_client.c 
 shlist.c 
 utils.c 
 usb_vendors.c

아래 위치의 헤더파일들이 참조된다.
development/host/windows/usb/api/

프로그램의 시작지점은 아래와 같다.

int main(int argc, char **argv)
{
    adb_trace_init();
#if ADB_HOST
    adb_sysdeps_init();
    return adb_commandline(argc - 1, argv + 1);
#else
    if((argc > 1) && (!strcmp(argv[1],"recovery"))) {
        adb_device_banner = "recovery";
        recovery_mode = 1;
    }

    start_device_log();
    return adb_main(0);
#endif
}

commandline.c의 아래 함수에 커맨드라인 명령어의 처리 코드를 찾아볼 수 있다.

int adb_commandline(int argc, char **argv)
{
...
}

adb윈도우용은 AdbWinApi.dll과 AdbWinUsbApi.dll과 함께 연동된다.
주요 API는 AdbWinApi.dll에 정의되어 있으며 AdbWinUsbApi.dll은 실제 Usb device와 연동부분을 책임진다.

오픈소스상의 아래 위치에 소스가 위치한다.

open_src/system/core/adb -> adb server, adb demon, adb client based on command-line의 소스가 OS별(linux, window, OSX)로 구현되어 있다.
open_src/developments/hosts/windows/usb -> 윈도우용 AdbWinApi.dll과 AdbWinUsbApi.dll의 소스와 드라이버등이 있다.

developments/hosts/windows/usb폴더구조는 다음과 같다.
 adb_winapi_test : test app
 api                   : AdbWinApi의 소스, adb.exe가 직접적으로 사용한다.
 legacy              : 드라이버
 winusb             : AdbWinUsbApi의 소스, Usb 연동부분에 대한 소스로 AdbWinApi가 로드하여 사용한다.

adb와 유사한 클라이언트 앱을 만들고자 한다면 AdbWinApi.dll이 노출하는 API들에 대한 스펙을 숙지하는것이 중요하다.
아래에 몇가지 API들을 소개한다.

adb_api.h
ADBWIN_API ADBAPIHANDLE __cdecl AdbEnumInterfaces(GUID class_id,
                                          bool exclude_not_present,
                                          bool exclude_removed,
                                          bool active_only);

ADBWIN_API bool __cdecl AdbNextInterface(ADBAPIHANDLE adb_handle,
                                 AdbInterfaceInfo* info,
                                 unsigned long* size);

ADBWIN_API bool __cdecl AdbResetInterfaceEnum(ADBAPIHANDLE adb_handle);

ADBWIN_API ADBAPIHANDLE __cdecl AdbCreateInterfaceByName(const wchar_t* interface_name);

ADBWIN_API ADBAPIHANDLE __cdecl AdbCreateInterface(GUID class_id,
                                           unsigned short vendor_id,
                                           unsigned short product_id,
                                           unsigned char interface_id);

ADBWIN_API bool __cdecl AdbGetInterfaceName(ADBAPIHANDLE adb_interface,
                                    void* buffer,
                                    unsigned long* buffer_char_size,
                                    bool ansi);

ADBWIN_API bool __cdecl AdbGetSerialNumber(ADBAPIHANDLE adb_interface,
                                   void* buffer,
                                   unsigned long* buffer_char_size,
                                   bool ansi);

ADBWIN_API bool __cdecl AdbGetUsbDeviceDescriptor(ADBAPIHANDLE adb_interface,
                                          USB_DEVICE_DESCRIPTOR* desc);

ADBWIN_API bool __cdecl AdbGetUsbConfigurationDescriptor(
                    ADBAPIHANDLE adb_interface,
                    USB_CONFIGURATION_DESCRIPTOR* desc);

ADBWIN_API bool __cdecl AdbGetUsbInterfaceDescriptor(ADBAPIHANDLE adb_interface,
                                             USB_INTERFACE_DESCRIPTOR* desc);

ADBWIN_API bool __cdecl AdbGetEndpointInformation(ADBAPIHANDLE adb_interface,
                                          unsigned char endpoint_index,
                                          AdbEndpointInformation* info);

ADBWIN_API bool __cdecl AdbGetDefaultBulkReadEndpointInformation(
                    ADBAPIHANDLE adb_interface,
                    AdbEndpointInformation* info);

ADBWIN_API bool __cdecl AdbGetDefaultBulkWriteEndpointInformation(
                    ADBAPIHANDLE adb_interface,
                    AdbEndpointInformation* info);

ADBWIN_API ADBAPIHANDLE __cdecl AdbOpenEndpoint(ADBAPIHANDLE adb_interface,
                                        unsigned char endpoint_index,
                                        AdbOpenAccessType access_type,
                                        AdbOpenSharingMode sharing_mode);

ADBWIN_API ADBAPIHANDLE __cdecl AdbOpenDefaultBulkReadEndpoint(
                            ADBAPIHANDLE adb_interface,
                            AdbOpenAccessType access_type,
                            AdbOpenSharingMode sharing_mode);

ADBWIN_API ADBAPIHANDLE __cdecl AdbOpenDefaultBulkWriteEndpoint(
                            ADBAPIHANDLE adb_interface,
                            AdbOpenAccessType access_type,
                            AdbOpenSharingMode sharing_mode);

ADBWIN_API ADBAPIHANDLE __cdecl AdbGetEndpointInterface(ADBAPIHANDLE adb_endpoint);

ADBWIN_API bool __cdecl AdbQueryInformationEndpoint(ADBAPIHANDLE adb_endpoint,
                                            AdbEndpointInformation* info);

ADBWIN_API ADBAPIHANDLE __cdecl AdbReadEndpointAsync(ADBAPIHANDLE adb_endpoint,
                                             void* buffer,
                                             unsigned long bytes_to_read,
                                             unsigned long* bytes_read,
                                             unsigned long time_out,
                                             HANDLE event_handle);

ADBWIN_API ADBAPIHANDLE __cdecl AdbWriteEndpointAsync(ADBAPIHANDLE adb_endpoint,
                                              void* buffer,
                                              unsigned long bytes_to_write,
                                              unsigned long* bytes_written,
                                              unsigned long time_out,
                                              HANDLE event_handle);

ADBWIN_API bool __cdecl AdbReadEndpointSync(ADBAPIHANDLE adb_endpoint,
                                    void* buffer,
                                    unsigned long bytes_to_read,
                                    unsigned long* bytes_read,
                                    unsigned long time_out);

ADBWIN_API bool __cdecl AdbWriteEndpointSync(ADBAPIHANDLE adb_endpoint,
                                     void* buffer,
                                     unsigned long bytes_to_write,
                                     unsigned long* bytes_written,
                                     unsigned long time_out);

ADBWIN_API bool __cdecl AdbGetOvelappedIoResult(ADBAPIHANDLE adb_io_completion,
                                        LPOVERLAPPED overlapped,
                                        unsigned long* bytes_transferred,
                                        bool wait);

ADBWIN_API bool __cdecl AdbHasOvelappedIoComplated(ADBAPIHANDLE adb_io_completion);

ADBWIN_API bool __cdecl AdbCloseHandle(ADBAPIHANDLE adb_handle);

안드로이드 Strings 리소스로 format string작업을 하고자 할경우가 있다.

한국어와 영어로 '나는 안드로이드이다'를 resource로 처리하고자 할 경우를 예를 들면..

한국어 = '나는 android 이다'

영어 = 'I am an android'

가 된다...

이를 다국어 작업을 하기 위해서는 C code의 printf의 입력문처럼 아래와 같이 처리하고자 할것이다.

한국어 printf("나는 %s 이다", "android")

영어 printf("I am an %s", "android")

위와 같이 하기 위해서는 

1. strings.xml에resources태그에  xmlns:xliff 속성을 아래와 같이 추가하고...

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

간혹 암호화가 필요할 때가 있다. 이 경우 사용가능한 대칭키 암호화에 사용되는 자바 유틸이다.

javax패키지를 사용하며 안드로이드에서 그대로 사용이 가능하다.

Base64는 안드로이드 오픈소스에서 가져다가 사용하였다.

import java.io.UnsupportedEncodingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.SecretKey;

public class CryptoUtil {

Cipher ecipher;

    Cipher dcipher;

    public CryptoUtil(SecretKey key, String algorithm) {

        try {

            ecipher = Cipher.getInstance(algorithm);

            dcipher = Cipher.getInstance(algorithm);

            ecipher.init(Cipher.ENCRYPT_MODE, key);

            dcipher.init(Cipher.DECRYPT_MODE, key);

        } catch (javax.crypto.NoSuchPaddingException e) {

        } catch (java.security.NoSuchAlgorithmException e) {

        } catch (java.security.InvalidKeyException e) {

        }

    }

public String encrypt(String str) {

try {

// Encode the string into bytes using utf-8

byte[] utf8 = str.getBytes("UTF8");

// Encrypt

byte[] enc = ecipher.doFinal(utf8);

// Encode bytes to base64 to get a string

return Base64.encodeToString(enc, Base64.URL_SAFE|Base64.NO_WRAP);

//return String.valueOf(enc);

} catch (javax.crypto.BadPaddingException e) {

e.printStackTrace();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (java.io.IOException e) {

e.printStackTrace();

}

return null;

}

public String decrypt(String str) {

try {

    // Decode base64 to get bytes

byte[] dec = Base64.decode(str, Base64.URL_SAFE|Base64.NO_WRAP);

// Decrypt

byte[] utf8 = dcipher.doFinal(dec);

// Decode using utf-8

return new String(utf8, "UTF8");

} catch (javax.crypto.BadPaddingException e) {

e.printStackTrace();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (java.io.IOException e) {

e.printStackTrace();

}

return null;

}

    public static void main(String[] args) throws Exception {

        // Generate a temporary key. In practice, you would save this key.

        SecretKey key = KeyGenerator.getInstance("DES").generateKey();

        // Create encrypter/decrypter class

        CryptoUtil c = new CryptoUtil(key, "DES");

        // Encrypt

        String encrypted = c.encrypt("안녕하세요 이요삼입니다...");

        System.out.println(encrypted);

        // Decrypt

        String decrypted = c.decrypt(encrypted);

        System.out.println(decrypted);       

    }

}