diff --git a/README.md b/README.md
index d10ec38..ee6cac1 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,7 @@ You can change path to playlist and music files by "Playlist directory" preferen
 
 ## TODO
 - implement music player as Service to play long time
+- change webview into photo view, movie player...
 - Design for tablets
 - support HVGA, WVGA, WVGA+ resolution
 -- http://developer.android.com/resources/dashboard/screens.html
@@ -60,28 +61,25 @@ You can change path to playlist and music files by "Playlist directory" preferen
 -- scale of web contents
 - localize: French, Chinese
 - add mode to display alert dialog if device is not charged when alarm is set
+- improve UI to edit playlist
 - refactor class design, activity, player and playlist
 - show notification while playing music
 - fix UI update bug when sleep timer expires (broadcast -> activity)
-- remove duplicate time from list which is specified by voice
 - conditional playlist
 -- Sunday, holiday playlist etc...
 - make COOL widget to set alarm (make clock widget?)
-- improve UI to edit playlist
 - add more test cases
 -- double touch of webview
 -- label text is updated when music is stopped or alarm is canceled
 -- check default config value
--- test landscape mode
 - fix vibrator timing
-- fix bug when native player is used....
-- change webview into photo view, movie player...
 - add source of malarm_test into this repository
 - refactor code to clear browser history
 - support podcast
 - use Actionbar ?
 - record wakeup time?
 - support shuffle?
+- fix bug when native player is used....
 
 ## Appendix
 ### How To Build From Command Line
diff --git a/src/com/mamewo/malarm24/MalarmActivity.java b/src/com/mamewo/malarm24/MalarmActivity.java
index deb9f89..8247175 100644
--- a/src/com/mamewo/malarm24/MalarmActivity.java
+++ b/src/com/mamewo/malarm24/MalarmActivity.java
@@ -13,7 +13,10 @@
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.GregorianCalendar;
+import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
+import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import android.app.Activity;
@@ -896,15 +899,17 @@ public TimePickerTime(int hour, int min, String speach) {
 		}
 	}
 
-	private class ClickListener implements DialogInterface.OnClickListener {
-		private ArrayList<TimePickerTime> mTimeList;
+	private class ClickListener
+		implements DialogInterface.OnClickListener
+	{
+		private TimePickerTime[] mTimeList;
 
-		public ClickListener(ArrayList<TimePickerTime> time) {
+		public ClickListener(TimePickerTime[] time) {
 			mTimeList = time;
 		}
 		@Override
 		public void onClick(DialogInterface dialog, int which) {
-			setTimePickerTime(mTimeList.get(which));
+			setTimePickerTime(mTimeList[which]);
 		}
 	}
 	
@@ -921,9 +926,10 @@ private void setTimePickerTime(TimePickerTime time) {
 	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 		if (requestCode == SPEECH_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
 			ArrayList<String> matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
-			ArrayList<TimePickerTime> result = new ArrayList<TimePickerTime>();
-			for (String speach : matches) {
-				Matcher m = TIME_PATTERN.matcher(speach);
+			//ArrayList<TimePickerTime> result = new ArrayList<TimePickerTime>();
+			Map<String, TimePickerTime> result = new HashMap<String, TimePickerTime>();
+			for (String speech : matches) {
+				Matcher m = TIME_PATTERN.matcher(speech);
 				if (m.matches()) {
 					int hour = Integer.valueOf(m.group(1)) % 24;
 					int minute;
@@ -937,10 +943,13 @@ else if ("半".equals(min_part)) {
 					else {
 						minute = Integer.valueOf(m.group(3)) % 60;
 					}
-					result.add(new TimePickerTime(hour, minute, speach));
+					String key = hour + ":" + minute;
+					if(! result.containsKey(key)){
+						result.put(key, new TimePickerTime(hour, minute, speech));
+					}
 				}
 				else {
-					Matcher m2 = AFTER_TIME_PATTERN.matcher(speach);
+					Matcher m2 = AFTER_TIME_PATTERN.matcher(speech);
 					if (m2.matches()) {
 						final String hour_part = m2.group(2);
 						final String min_part = m2.group(3);
@@ -962,8 +971,12 @@ else if ("半".equals(min_part)) {
 						}
 						final Calendar cal = new GregorianCalendar();
 						cal.setTimeInMillis(System.currentTimeMillis() + after_millis);
-						result.add(new TimePickerTime(cal.get(Calendar.HOUR_OF_DAY),
-								   cal.get(Calendar.MINUTE), speach));
+						int hour = cal.get(Calendar.HOUR_OF_DAY);
+						int min = cal.get(Calendar.MINUTE);
+						String key = hour + ":" + min;
+						if(!result.containsKey(key)){
+							result.put(key, new TimePickerTime(hour, min, speech));
+						}
 					}
 				}
 			}
@@ -971,18 +984,19 @@ else if ("半".equals(min_part)) {
 				showMessage(this, getString(R.string.voice_fail));
 			}
 			else if (result.size() == 1) {
-				setTimePickerTime(result.get(0));
+				setTimePickerTime(result.values().iterator().next());
 			}
 			else {
-				String [] speach_array = new String[result.size()];
-				for (int i = 0; i < result.size(); i++) {
-					TimePickerTime time = result.get(i);
-					speach_array[i] = time.mSpeach + String.format(" (%02d:%02d)", time.mHour, time.mMin);
+				String [] speechArray = new String[result.size()];
+				Iterator<TimePickerTime> iter = result.values().iterator();
+				for(int i = 0; i < result.size(); i++){
+					TimePickerTime time = iter.next();
+					speechArray[i] = time.mSpeach + String.format(" (%02d:%02d)", time.mHour, time.mMin);
 				}
 				//select from list dialog
 				new AlertDialog.Builder(this)
 				.setTitle(R.string.select_time_from_list)
-				.setItems(speach_array, new ClickListener(result))
+				.setItems(speechArray, new ClickListener(result.values().toArray(new TimePickerTime[0])))
 				.create()
 				.show();
 			}