Android - TimePicker minutes to 15

Can I control the Android TimePicker view to just show the minutes to 15 minutes interval?

Meaning if it's 12:28 now, show 12:30 and clicking the + and - button will increment and decrement by 15?

Create a xml file and name it activity_time_picker.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

 <TimePicker
        android:id="@+id/timePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/layoutHourMinute"
        android:layout_centerInParent="true"

        />

</RelativeLayout>

now create activity class like this

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import android.annotation.SuppressLint;

import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.NumberPicker;
import android.widget.TimePicker;

public class TimePickerActivity extends Activity {


    TimePicker timePicker;
    private int TIME_PICKER_INTERVAL = 15;
     NumberPicker minutePicker;
     List<String> displayedValues;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
                 super.onCreate(savedInstanceState);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        setContentView(R.layout.activity_time_picker);
        super.onCreate(savedInstanceState);
        timePicker = (TimePicker)findViewById(R.id.timePicker1);

        timePicker.setIs24HourView(true);
        timePicker.setCurrentHour(0);
        timePicker.setCurrentMinute(0);

        setTimePickerInterval(timePicker);
    }
@SuppressLint("NewApi")
    private void setTimePickerInterval(TimePicker timePicker) {
         try {
                Class<?> classForid = Class.forName("com.android.internal.R$id");
               // Field timePickerField = classForid.getField("timePicker");  

                Field field = classForid.getField("minute");
                minutePicker = (NumberPicker) timePicker
                        .findViewById(field.getInt(null));

                minutePicker.setMinValue(0);
                minutePicker.setMaxValue(3);
                displayedValues = new ArrayList<String>();
                for (int i = 0; i < 60; i += TIME_PICKER_INTERVAL) {
                    displayedValues.add(String.format("%02d", i));
                }
              //  for (int i = 0; i < 60; i += TIME_PICKER_INTERVAL) {
              //      displayedValues.add(String.format("%02d", i));
              //  }
                minutePicker.setDisplayedValues(displayedValues
                        .toArray(new String[0]));
               minutePicker.setWrapSelectorWheel(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
    }
}

Here's my version where you can set the interval:

private static final int TIME_PICKER_INTERVAL=15;
private boolean mIgnoreEvent=false;

private TimePicker.OnTimeChangedListener mTimePickerListener=new TimePicker.OnTimeChangedListener(){
    public void onTimeChanged(TimePicker timePicker, int hourOfDay, int minute){
        if (mIgnoreEvent)
            return;
        if (minute%TIME_PICKER_INTERVAL!=0){
            int minuteFloor=minute-(minute%TIME_PICKER_INTERVAL);
            minute=minuteFloor + (minute==minuteFloor+1 ? TIME_PICKER_INTERVAL : 0);
            if (minute==60)
                minute=0;
            mIgnoreEvent=true;
            timePicker.setCurrentMinute(minute);
            mIgnoreEvent=false;
        }

    }
};

The following worked for me.

First, in onCreate:

pickStartTime = (TimePicker)findViewById(R.id.StartTime);
pickStartTime.setOnTimeChangedListener(mStartTimeChangedListener);

Set the OnTimeChangedListener:

private TimePicker.OnTimeChangedListener mStartTimeChangedListener =
    new TimePicker.OnTimeChangedListener() {

    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
        updateDisplay(view, startDate, hourOfDay, minute);          
    }
};

Null OnTimeChangedListener (explained in comments in updateDisplay below):

private TimePicker.OnTimeChangedListener mNullTimeChangedListener =
    new TimePicker.OnTimeChangedListener() {

    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {

    }
};

private void updateDisplay(TimePicker timePicker, Date date, int hourOfDay, int minute) { 

    // do calculation of next time 
    int nextMinute = 0;     
    if (minute >= 45 && minute <= 59)
        nextMinute = 45;
    else if(minute >= 30)
        nextMinute = 30;
    else if(minute >= 15)
        nextMinute = 15;
    else if(minute > 0)
        nextMinute = 0;
    else {          
        nextMinute = 45;
    }

    // remove ontimechangedlistener to prevent stackoverflow/infinite loop
    timePicker.setOnTimeChangedListener(mNullTimeChangedListener);

    // set minute
    timePicker.setCurrentMinute(nextMinute);

    // hook up ontimechangedlistener again
    timePicker.setOnTimeChangedListener(mStartTimeChangedListener);

    // update the date variable for use elsewhere in code
    date.setMinutes(nextMinute);  
}

You have to write your own TimePicker. Not sure if you can extend the existing TimePicker and handle the button events on your own.

I think I figured it out. Might be ghetto way but...

Here is what I did.

start_time.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {

            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                updateDisplay(hourOfDay, minute);
            }
        });

private void updateDisplay(int hourOfDay, int minute) {
                // do calculation of next time
                // nextTime = calculation of next time;

                // the processed boolean is to prevent infinite loop
        if (!processed) {
            start_time.setCurrentMinute(nextTime);  
                        processed = true;
        } else {
                        processed = false;
                }
    }