TimePicker

gistfile1.java

/*
 * Copyright (C) 2011 Morphoss Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * The original (Licence Free) code for this class was downloaded from http://www.ebessette.com/d/TimePickerPreference
 *
 */

// Please note this must be the package if you want to use XML-based preferences
package com.morphoss.acal;
 
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.DialogPreference;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.TimePicker;
 
/**
 * A preference type that allows a user to choose a time
 */
public class TimePickerPreference extends DialogPreference implements
		TimePicker.OnTimeChangedListener {
 
	/**
	 * The validation expression for this preference
	 */
	private static final String VALIDATION_EXPRESSION = "[0-2]*[0-9]:[0-5]*[0-9]";
 
	/**
	 * The default value for this preference
	 */
	private String defaultValue = "12:00";
 
	/**
	 * @param context
	 * @param attrs
	 */
	public TimePickerPreference(Context context, AttributeSet attrs) {
		super(context, attrs);
		initialize(context);
	}
 
	/**
	 * @param context
	 * @param attrs
	 * @param defStyle
	 */
	public TimePickerPreference(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		initialize(context);
	}
 
	/**
	 * Initialize this preference
	 */
	private void initialize( Context context) {
		setPersistent(true);
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
		defaultValue = prefs.getString(getKey(), defaultValue);
	}
 
	/*
	 * (non-Javadoc)
	 * 
	 * @see android.preference.DialogPreference#onCreateDialogView()
	 */
	@Override
	protected View onCreateDialogView() {
 
		TimePicker tp = new TimePicker(getContext());
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
		boolean is24Hour = prefs.getBoolean(getContext().getString(R.string.prefTwelveTwentyfour), false);
		tp.setIs24HourView(is24Hour);
		tp.setOnTimeChangedListener(this);
 
		Log.d("TimePicker","Current default ="+getPersistedString(this.defaultValue));
		int h = getHour();
		int m = getMinute();
		if (h >= 0 && h < 24)  tp.setCurrentHour(h);
		if ( m >= 0 && m < 60) tp.setCurrentMinute(m);
 
		return tp;
	}
 
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * android.widget.TimePicker.OnTimeChangedListener#onTimeChanged(android
	 * .widget.TimePicker, int, int)
	 */
	@Override
	public void onTimeChanged(TimePicker view, int hour, int minute) {
 
		persistString(String.format("%02d:%02d",hour , minute));
	}
 
	/*
	 * (non-Javadoc)
	 * 
	 * @see android.preference.Preference#setDefaultValue(java.lang.Object)
	 */
	@Override
	public void setDefaultValue(Object defaultValue) {
		// BUG this method is never called if you use the 'android:defaultValue' attribute in your XML preference file, not sure why it isn't		
 
		super.setDefaultValue(defaultValue);
 
		if (!(defaultValue instanceof String)) {
			return;
		}
 
		if (!((String) defaultValue).matches(VALIDATION_EXPRESSION)) {
			return;
		}
 
		this.defaultValue = (String) defaultValue;
	}
 
	/**
	 * Get the hour value (in 24 hour time)
	 * 
	 * @return The hour value, will be 0 to 23 (inclusive)
	 */
	private int getHour() {
		String time = getPersistedString(this.defaultValue);
		if (time == null || !time.matches(VALIDATION_EXPRESSION)) {
			return -1;
		}
 
		return Integer.valueOf(time.split(":")[0]);
	}
 
	/**
	 * Get the minute value
	 * 
	 * @return the minute value, will be 0 to 59 (inclusive)
	 */
	private int getMinute() {
		String time = getPersistedString(this.defaultValue);
		if (time == null || !time.matches(VALIDATION_EXPRESSION)) {
			return -1;
		}
 
		return Integer.valueOf(time.split(":")[1]);
	}
}