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@SamWhited
Created December 17, 2014 00:10
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Time picker preference for Android
import android.content.Context;
import android.content.res.TypedArray;
import android.preference.DialogPreference;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TimePicker;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
public class TimePreference extends DialogPreference implements Preference.OnPreferenceChangeListener {
private TimePicker picker = null;
public final static long DEFAULT_VALUE = 0;
public TimePreference(final Context context, final AttributeSet attrs) {
super(context, attrs, 0);
this.setOnPreferenceChangeListener(this);
}
protected void setTime(final long time) {
persistLong(time);
notifyDependencyChange(shouldDisableDependents());
notifyChanged();
}
protected void updateSummary(final long time) {
final DateFormat dateFormat = android.text.format.DateFormat.getTimeFormat(getContext());
final Date date = new Date(time);
setSummary(dateFormat.format(date.getTime()));
}
@Override
protected View onCreateDialogView() {
picker = new TimePicker(getContext());
picker.setIs24HourView(android.text.format.DateFormat.is24HourFormat(getContext()));
return picker;
}
protected Calendar getPersistedTime() {
final Calendar c = Calendar.getInstance();
c.setTimeInMillis(getPersistedLong(DEFAULT_VALUE));
return c;
}
@Override
protected void onBindDialogView(final View v) {
super.onBindDialogView(v);
final Calendar c = getPersistedTime();
picker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
picker.setCurrentMinute(c.get(Calendar.MINUTE));
}
@Override
protected void onDialogClosed(final boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (positiveResult) {
final Calendar c = Calendar.getInstance();
c.set(Calendar.MINUTE, picker.getCurrentMinute());
c.set(Calendar.HOUR_OF_DAY, picker.getCurrentHour());
if (!callChangeListener(c.getTimeInMillis())) {
return;
}
setTime(c.getTimeInMillis());
}
}
@Override
protected Object onGetDefaultValue(final TypedArray a, final int index) {
return a.getInteger(index, 0);
}
@Override
protected void onSetInitialValue(final boolean restorePersistedValue, final Object defaultValue) {
long time;
if (defaultValue == null) {
time = restorePersistedValue ? getPersistedLong(DEFAULT_VALUE) : DEFAULT_VALUE;
} else if (defaultValue instanceof Long) {
time = restorePersistedValue ? getPersistedLong((Long) defaultValue) : (Long) defaultValue;
} else if (defaultValue instanceof Calendar) {
time = restorePersistedValue ? getPersistedLong(((Calendar)defaultValue).getTimeInMillis()) : ((Calendar)defaultValue).getTimeInMillis();
} else {
time = restorePersistedValue ? getPersistedLong(DEFAULT_VALUE) : DEFAULT_VALUE;
}
setTime(time);
updateSummary(time);
}
@Override
public boolean onPreferenceChange(final Preference preference, final Object newValue) {
((TimePreference) preference).updateSummary((Long)newValue);
return true;
}
}
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