html문서 내에서 사용되는 Entity 코드 정리

생김새	코드	의미
"	"	따옴표
&	&	앰퍼샌드
<	&lt;	꺽쇠
>	&gt;	꺽쇠
©	&copy;	카피라이트
®	&reg;	등록상표
™	&trade;	트레이드마크
×	&times;	곱하기 기호
÷	&divide;	나눗셈 기호
•	&bull;	불릿
·	&middot;	가운데 점
⋅	&sdot;	dot operator
—	&mdash; or &#8212;	dash

어플 실행 여부 확인

public static boolean isRunningProcess(Context context, String packageName){
 boolean isRunning = false;
  
//        ActivityManager actMng = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);                      
//        List<RunningAppProcessInfo> proceses = actMng.getRunningAppProcesses(); 
//        for(RunningAppProcessInfo rap : proceses){                                
//         if( rap.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND && rap.processName.equals(packageName)){
//                    isRunning = true;
//                    break;
//         }
//        }
 
 ActivityManager activityManager = (ActivityManager) context.getSystemService(context.ACTIVITY_SERVICE);
 List<RunningTaskInfo> info;
 info = activityManager.getRunningTasks(1);
 for (Iterator iterator = info.iterator(); iterator.hasNext();)  {
  RunningTaskInfo runningTaskInfo = (RunningTaskInfo) iterator.next();
  if(runningTaskInfo.topActivity.getClassName().startsWith(packageName) ) {
   return true;
  }
 }
 
 return isRunning;
}

사용자가 5초 동안 앱을 터치하지 않았을 경우 처리

public class hard_UserInteraction extends Activity {
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.hard_userinteraction);
 }

 protected Handler mFinishHandler = new Handler() {
  public void handleMessage(android.os.Message msg) {
   finish();
  }
 };

 void registerFinish() {
  mFinishHandler.sendEmptyMessageDelayed(0, 5 * 1000);
 }

 void unRegisterFinish() {
  
 }

 void RefreshFinish() {
  unRegisterFinish();
  registerFinish();
 }

 protected void onResume() {
  super.onResume();
  registerFinish();
 }

 protected void onPause() {
  super.onPause();
  unRegisterFinish();
 }

 public void onUserInteraction() {
  super.onUserInteraction();
  RefreshFinish();
 }

 protected void onUserLeaveHint () {
  super.onUserLeaveHint();
  Toast.makeText(this, "Leave by user", Toast.LENGTH_LONG).show();
 }
}

출처 : http://www.winapi.co.kr/android/annex/19-3.htm

휴대폰 번호 정규식(070포함)

//휴대폰 번호 정규식
public boolean getCheckTelNo(String noStr) {
 String pattern = "^0[17](?:0|1|[6-9])-?(\\d{3,4})-?(\\d{4})$";;
 Pattern tellPattern = Pattern.compile(pattern);
 if(noStr == null || noStr.length()==0) 
  return false;
 
 Matcher matcher = tellPattern.matcher( noStr);
 if(matcher.matches()) {
  return true;
 } else {
  return false;
 }
}

Activity 간 객체 넘기기

[객체 클래스]

public class BookData implements Parcelable{
 
 private String title;
    private String author;
 
 public BookData(Parcel in){
  readFromParcel(in);
 }
 
 public BookData(String title, String author) {
  super();
  this.title = title;
  this.author = author;
 }
 
 @Override
 public int describeContents() {
  return 0;
 }

 @Override
 public void writeToParcel(Parcel dest, int flags) {
  dest.writeString(title);
  dest.writeString(author);
 }
 
 public static final Parcelable.Creator CREATOR = new Parcelable.Creator(){
  @Override
  public Object createFromParcel(Parcel source) {
   return new BookData(source);
  }

  @Override
  public Object[] newArray(int size) {
   return new BookData[size];
  }
 };
 
 private void readFromParcel(Parcel in){
  title = in.readString();
        author = in.readString();
 }
 
 public String getTitle() {
  return title;
 }

 public void setTitle(String title) {
  this.title = title;
 }

 public String getAuthor() {
  return author;
 }

 public void setAuthor(String author) {
  this.author = author;
 }
}

public class MainActivity extends Activity {
 Button btn;
 Activity mActivity;
 Context mContext;
 
 BookData data;
 ArrayList array = new ArrayList();
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        mActivity = this;
        mContext = this;
        
        data = new BookData("TITLE1", "TEST1");
        array.add(data);
        
        data = new BookData("TITLE2", "TEST2");
        array.add(data);
        
        
        btn = (Button)findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener(){
   @Override
   public void onClick(View v) {
    Intent intent = new Intent(mContext, Test.class);
    intent.putParcelableArrayListExtra("book", array);
    //intent.putExtra("book", data);
    mActivity.startActivity(intent);
    finish();
   }
        });
        
        Log.d("TEST", "onCreate!");
    }
}

public class Test extends Activity{

 BookData book;
 ArrayList arr;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  arr = getIntent().getParcelableArrayListExtra("book");
  
  // Bundle bundle = getIntent().getExtras();
  // book = bundle.getParcelable("book");
  
  for(int i=0; i < arr.size(); i++){
   book = arr.get(i);
   Log.d("TEST", "Author: " + book.getAuthor() + ", Title: " + book.getTitle());
  }
 }
}

AppWidget에서의 onEnabled() 재정의

스케쥴러가 메모리 부족 시 제거할 프로세스 선택할 때 선택되지 않도록 지정하는 용도로도 사용된다.

@Override
public void onEnabled(Context context) {
    PackageManager pm = context.getPackageManager();
    pm.setComponentEnabledSetting(
        new ComponentName("패키지명", ".클래스명"),
           PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
           PackageManager.DONT_KILL_APP
    );
}

Google Charts API를 이용한 QRCode 생성

private Bitmap makeQRCode(){
  String input = "http://m.naver.com";
  URL url;

  try{
    url = new URL("http://chart.apis.google.com/chart?chs=300x300&cht=qr&choe=UTF-8&chl=" 
    +  URLEncoder.encode(input, "UTF-8"));
    URLConnection conn = url.openConnection();
    conn.connect();
    InputStream is = conn.getInputStream();
    BufferedInputStream bis = new BufferedInputStream(is);
    Bitmap bmp = BitmapFactory.decodeStream(bis);
    bis.close();
    is.close();
  
    return bmp;
  }catch(Exception e){
    e.printStackTrace();
    return null;
  }
}

[Google chart api]

cht=qr
chs=<size>
chl=<text to encode>
choe=<output encoding>