title: Modifying or Changing Min, Max and Displayed values for NumberPicker
body: <p>I have a number picker for minutes. Initially I set displayed values to 15minute intervals.
  ie, 0,15,30, 45  which means Min is 1 and max is 4.
  On user selecting a menu option, I want to dynamically change the same Number picker to
  have 5 minute intervals which means displayed values will be 0,5,10... 50,55   Min will remain 1 and max will be 12.</p>
  
  <p>It works fine with initial settings for both types. However, I am getting array out of index when I try to modify the max value or displayed values. The issue occurs when changing the characteristics both ways ie 15 to 5 or 5 to 15 minute intervals.</p>
  
  <p>Question is am I doing something wrong or is this not possible at all with number pickers.
  My sample code is below. thanks.</p>
  
  <pre><code>private void setMinsPicker(String opt) {
      String[] mins15 = { "0", "15", "30", "45" };
      String[] mins5 = { "0", "5", "10", "15", "20", "25", "30", "35", "40",
              "45", "50", "55" };
      final String[] mins;
  
      if (opt == "15") {
          mins = mins15;
      } else {
          mins = mins5;
      }
  
      numPickerMinutes = (NumberPicker) findViewById(R.id.pMinutes);
  
      int ml = mins.length;
  
      numPickerMinutes.setMinValue(1);
      numPickerMinutes.setDisplayedValues(mins);
      numPickerMinutes.setMaxValue(ml);
  }
  </code></pre>