CodeDB

File datafile = new File("/sdcard/filename.txt");
  StringBuilder data = new StringBuilder(); 
  try {    
   BufferedReader reader = new BufferedReader(new FileReader(datafile));    
   String readdata;     
   while ((readdata = reader.readLine())!=null) {        
    data.append(readdata); 
    }
   } catch (IOException e) {    
   }
  }



String tmp="";
String url="/sdcard/filename.txt";
  
  try {
   BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(new File(url)), "UTF-8"));
   String line;     
   while ((line = br.readLine()) != null) {        
    tmp+=line;
   }
  } catch (IOException e) { 
  }


FileInputStream fis = new FileInputStream(url);
   Reader in = new InputStreamReader(fis, "UTF-16");
   String tmp="";
   char []buf = new char[fis.available()];
   in.read(buf);
   tmp = new String(buf);
   fis.close();

Bitmap bitmap = new Bitmap (...);

Drawable drawable = new BitmapDrawable(bitmap);


Drawable -> Bitmap

Bitmap bitmap = Bitmap.createBitmap(width, height, true);
Drawable iconDrawable =
packageManager.getActivityIcon(resolveInfo.activityInfo);
Canvas canvas = new Canvas(bitmap);

drawable.setBounds(0, 0, width, height);
drawable.draw(canvas);

1.화면이 가로, 세로 변경시 이벤트

@Override
    public void onConfigurationChanged(Configuration newConfig) {

      super.onConfigurationChanged(newConfig);
       int cnt=0;
         switch(newConfig.orientation){

            case Configuration.ORIENTATION_LANDSCAPE:
             //TODO
            break;

            case Configuration.ORIENTATION_PORTRAIT:  
            //TODO
            break;

         } 
    
    }

2.현제 화면이 가로, 세로인지 확인
Configuration config = getResources().getConfiguration();
if(config.orientation == Configuration.ORIENTATION_PORTRAIT){
 //TODO
}
else if(config.orientation == Configuration.ORIENTATION_LANDSCAPE){
 //TODO
}

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        requestWindowFeature(Window.FEATURE_NO_TITLE);//타이틀바 제거
        setContentView(R.layout.main);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);//풀스크린

    }

WebView wv = new WebView(this);

wv.setVerticalScrollBarEnabled(false); 
wv.setHorizontalScrollBarEnabled(false);

// 웹페이지 띄우기    

Uri uri = Uri.parse("http://www.google.com");    

Intent it  = new Intent(Intent.ACTION_VIEW,uri);    

startActivity(it);    

// 구글맵 띄우기    

Uri uri = Uri.parse("geo:38.899533,-77.036476");    

Intent it = new Intent(Intent.Action_VIEW,uri);    

startActivity(it);     

// 구글 길찾기 띄우기    

Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=출발지주소&daddr=도착지주소&hl=ko");    

Intent it = new Intent(Intent.ACTION_VIEW,URI);    

startActivity(it);    

// 다이얼러 띄우기   

Uri uri = Uri.parse("tel:xxxxxx");    

Intent it = new Intent(Intent.ACTION_DIAL, uri);   

startActivity(it);   

// 전화걸기   

// 퍼미션을 잊지 마세요. <USES-PERMISSION id=android.permission.CALL_PHONE />    

Uri uri = Uri.parse("tel.xxxxxx");    

Intent it = new Intent(Intent.ACTION_CALL,uri);    

startActivity(it);   

// SMS/MMS 발송    

Intent it = new Intent(Intent.ACTION_VIEW);    

it.putExtra("sms_body", "The SMS text");    

it.setType("vnd.android-dir/mms-sms");    

startActivity(it);   

// SMS 발송    

Uri uri = Uri.parse("smsto:0800000123");    

Intent it = new Intent(Intent.ACTION_SENDTO, uri);    

it.putExtra("sms_body", "The SMS text");    

startActivity(it);   

// MMS 발송    

Uri uri = Uri.parse("content://media/external/images/media/23");    

Intent it = new Intent(Intent.ACTION_SEND);    

it.putExtra("sms_body", "some text");    

it.putExtra(Intent.EXTRA_STREAM, uri);    

it.setType("image/png");    

startActivity(it);     

// 이메일 발송    

Uri uri = Uri.parse("mailto:xxx@abc.com");    

Intent it = new Intent(Intent.ACTION_SENDTO, uri);    

startActivity(it);    

Intent it = new Intent(Intent.ACTION_SEND);    

it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");    

it.putExtra(Intent.EXTRA_TEXT, "The email body text");    

it.setType("text/plain");    

startActivity(Intent.createChooser(it, "Choose Email Client"));   

Intent it = new Intent(Intent.ACTION_SEND);   

String[] tos = {"me@abc.com"};   

String[] ccs = {"you@abc.com"};   

it.putExtra(Intent.EXTRA_EMAIL, tos);   

it.putExtra(Intent.EXTRA_CC, ccs);   

it.putExtra(Intent.EXTRA_TEXT, "The email body text");   

it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");   

it.setType("message/rfc822");   

startActivity(Intent.createChooser(it, "Choose Email Client"));    

// extra 추가하기    

Intent it = new Intent(Intent.ACTION_SEND);    

it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");    

it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");    

sendIntent.setType("audio/mp3");    

startActivity(Intent.createChooser(it, "Choose Email Client"));    

// 미디어파일 플레이 하기    

Intent it = new Intent(Intent.ACTION_VIEW);    

Uri uri = Uri.parse("file:///sdcard/song.mp3");    

it.setDataAndType(uri, "audio/mp3");    

startActivity(it);    

Uri uri = Uri.withAppendedPath(    

  MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");    

Intent it = new Intent(Intent.ACTION_VIEW, uri);    

startActivity(it);   

// 설치 어플 제거    

Uri uri = Uri.fromParts("package", strPackageName, null);    

Intent it = new Intent(Intent.ACTION_DELETE, uri);    

startActivity(it);    

// APK파일을 통해 제거하기    

Uri uninstallUri = Uri.fromParts("package", "xxx", null);    

returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri);    

// APK파일 설치    

Uri installUri = Uri.fromParts("package", "xxx", null);    

returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);    

// 음악 파일 재생    

Uri playUri = Uri.parse("file:///sdcard/download/everything.mp3");    

returnIt = new Intent(Intent.ACTION_VIEW, playUri);    

// 첨부파일을 추가하여 메일 보내기    

Intent it = new Intent(Intent.ACTION_SEND);   

it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");   

it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/eoe.mp3");   

sendIntent.setType("audio/mp3");   

startActivity(Intent.createChooser(it, "Choose Email Client"));    

// 마켓에서 어플리케이션 검색 (패키지명은 어플의 전체 패키지명을 입력해야 합니다.)   

Uri uri = Uri.parse("market://search?q=pname:pkg_name");   

Intent it = new Intent(Intent.ACTION_VIEW, uri);   

startActivity(it);   

// 마켓 어플리케이션 상세 화면 (아이디의 경우 마켓 퍼블리싱사이트의 어플을 선택후에 URL을 확인해보면 알 수 있습니다.)  

Uri uri = Uri.parse("market://details?id=어플리케이션아이디");   

Intent it = new Intent(Intent.ACTION_VIEW, uri);   

startActivity(it);   

// 구글 검색    

Intent intent = new Intent();    

intent.setAction(Intent.ACTION_WEB_SEARCH);    

intent.putExtra(SearchManager.QUERY,"searchString")    

startActivity(intent);  

출처: http://hoya4232.tistory.com/716
[출처] http://snipt.net/Martin/tag/android