Android "Clock" Source git clone, import Error

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http://stackoverflow.com – Cloned android source of Alarm clock from git. imported to my eclipse found following errors: Alarms.java: Line 463: Intent alarmChanged = new Intent(Intent.ACTION_ALARM_CHANGED); Error: ACTION_ALARM_CHANGED cannot be resolved or is not a field. --------------------------------------- AlarmKlaxon.java Line 89: mVibrator = new Vibrator(); Error: Cannot instantiate the type Vibrator ----------------------------------- DigitalClock.java Line 184: CharSequence newTime = DateFormat.format(mFormat, mCalendar); Error: Call requires API level 3 (current min is 1):android.text.format.DateFormat#for (HowTos)