TimePreference.java

/**
 * Source from CommonsWare: https://github.com/commonsguy/cw-lunchlist/blob/master/19-Alarm/LunchList/src/apt/tutorial/TimePreference.java
 * 
 */

package se.slide.timy.preferences;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.DialogPreference;
import android.text.format.DateFormat;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TimePicker;

public class TimePreference extends DialogPreference {
    private int lastHour = 0;
    private int lastMinute = 0;
    private TimePicker picker = null;

    public static int getHour(String time) {
        String[] pieces = time.split(":");

        return (Integer.parseInt(pieces[0]));
    }

    public static int getMinute(String time) {
        String[] pieces = time.split(":");

        return (Integer.parseInt(pieces[1]));
    }

    public TimePreference(Context ctxt, AttributeSet attrs) {
        super(ctxt, attrs);

        setPositiveButtonText("Set");
        setNegativeButtonText("Cancel");
    }

    @Override
    protected View onCreateDialogView() {
        picker = new TimePicker(getContext());

        if (DateFormat.is24HourFormat(getContext()))
            picker.setIs24HourView(true);
        else
            picker.setIs24HourView(false);

        return (picker);
    }

    @Override
    protected void onBindDialogView(View v) {
        super.onBindDialogView(v);

        picker.setCurrentHour(lastHour);
        picker.setCurrentMinute(lastMinute);
    }

    @Override
    protected void onDialogClosed(boolean positiveResult) {
        super.onDialogClosed(positiveResult);

        if (positiveResult) {
            lastHour = picker.getCurrentHour();
            lastMinute = picker.getCurrentMinute();

            String time = String.valueOf(lastHour) + ":" + String.valueOf(lastMinute);

            if (callChangeListener(time)) {
                persistString(time);
            }
        }
    }

    @Override
    protected Object onGetDefaultValue(TypedArray a, int index) {
        return (a.getString(index));
    }

    @Override
    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
        String time = null;

        if (restoreValue) {
            if (defaultValue == null) {
                time = getPersistedString("00:00");
            }
            else {
                time = getPersistedString(defaultValue.toString());
            }
        }
        else {
            time = defaultValue.toString();
        }

        lastHour = getHour(time);
        lastMinute = getMinute(time);
    }
}