/*
* MIT License
*
* Copyright (c) 2018 Soojeong Shin
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.example.android.newsfeed;
import android.app.DatePickerDialog;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import androidx.appcompat.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.DatePicker;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* The SettingsActivity is the activity that appears when a settings icon is clicked on.
*/
public class SettingsActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
// Navigate with the app icon in the action bar
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
/**
* The NewsPreferenceFragment implements the Preference.OnPreferenceChangeListener interface
* to set up to listen for any Preference changes made by the user.
* And the NewsPreferenceFragment also implements the DatePickerDialog.OnDateSetListener to
* receive a callback when the user has finished selecting a date.
*/
public static class NewsPreferenceFragment extends PreferenceFragment
implements Preference.OnPreferenceChangeListener, DatePickerDialog.OnDateSetListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings_main);
// Find the preference for number of items
Preference numOfItems = findPreference(getString(R.string.settings_number_of_items_key));
// bind the current preference value to be displayed
bindPreferenceSummaryToValue(numOfItems);
// Find the "order by" Preference object according to its key
Preference orderBy = findPreference(getString(R.string.settings_order_by_key));
// Update the summary so that it displays the current value stored in SharedPreferences
bindPreferenceSummaryToValue(orderBy);
// Find the "order date" Preference object according to its key
Preference orderDate = findPreference(getString(R.string.settings_order_date_key));
// Update the summary so that it displays the current value stored in SharedPreferences
bindPreferenceSummaryToValue(orderDate);
// Find the "color theme" Preference object according to its key
Preference colorTheme = findPreference(getString(R.string.settings_color_key));
// Update the summary so that it displays the current value stored in SharedPreferences
bindPreferenceSummaryToValue(colorTheme);
// Find the "text size" Preference object according to its key
Preference textSize = findPreference(getString(R.string.settings_text_size_key));
// Update the summary so that it displays the current value stored in SharedPreferences
bindPreferenceSummaryToValue(textSize);
// Find the "from date" Preference object according to its key
Preference fromDate = findPreference(getString(R.string.settings_from_date_key));
setOnPreferenceClick(fromDate);
// bind the current preference value to be displayed
bindPreferenceSummaryToValue(fromDate);
}
/**
* This method is called when the user has clicked a Preference.
*/
private void setOnPreferenceClick(Preference preference) {
preference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
@Override
public boolean onPreferenceClick(Preference preference) {
String key = preference.getKey();
if (key.equalsIgnoreCase(getString(R.string.settings_from_date_key))) {
showDatePicker();
}
return false;
}
});
}
/**
* Show the current date as the default date in the picker
*/
private void showDatePicker() {
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
new DatePickerDialog(getActivity(),
this, year, month, dayOfMonth).show();
}
@Override
public void onDateSet(DatePicker datePicker, int year, int month, int dayOfMonth) {
// Since it starts counting the months from 0, add one to the month value.
month = month + 1;
// Date the user selected
String selectedDate = year + "-" + month + "-" + dayOfMonth;
// Convert selected date string(i.e. "2017-2-1" into formatted date string(i.e. "2017-02-01")
String formattedDate = formatDate(selectedDate);
// Storing selected date
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
SharedPreferences.Editor editor = prefs.edit();
editor.putString(getString(R.string.settings_from_date_key), formattedDate).apply();
// Update the displayed preference summary after it has been changed
Preference fromDatePreference = findPreference(getString(R.string.settings_from_date_key));
bindPreferenceSummaryToValue(fromDatePreference);
}
/**
* This method is called when the user has changed a Preference.
* Update the displayed preference summary (the UI) after it has been changed.
* @param preference the changed Preference
* @param value the new value of the Preference
* @return True to update the state of the Preference with the new value
*/
@Override
public boolean onPreferenceChange(Preference preference, Object value) {
String stringValue = value.toString();
// Update the summary of a ListPreference using the label
if (preference instanceof ListPreference) {
ListPreference listPreference = (ListPreference) preference;
int prefIndex = listPreference.findIndexOfValue(stringValue);
if (prefIndex >= 0) {
CharSequence[] labels = listPreference.getEntries();
preference.setSummary(labels[prefIndex]);
}
} else {
preference.setSummary(stringValue);
}
return true;
}
/**
* Set this fragment as the OnPreferenceChangeListener and
* bind the value that is in SharedPreferences to what will show up in the preference summary
*/
private void bindPreferenceSummaryToValue(Preference preference) {
// Set the current NewsPreferenceFragment instance to listen for changes to the preference
// we pass in using
preference.setOnPreferenceChangeListener(this);
// Read the current value of the preference stored in the SharedPreferences on the device,
// and display that in the preference summary
SharedPreferences preferences =
PreferenceManager.getDefaultSharedPreferences(preference.getContext());
String preferenceString = preferences.getString(preference.getKey(), "");
onPreferenceChange(preference, preferenceString);
}
/**
* Convert selected date string(i.e. "2017-2-1" into formatted date string(i.e. "2017-02-01")
*
* @param dateString is the selected date from the DatePicker
* @return the formatted date string
*/
private String formatDate(String dateString) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-M-d");
Date dateObject = null;
try {
dateObject = simpleDateFormat.parse(dateString);
} catch (ParseException e) {
e.printStackTrace();
}
SimpleDateFormat df= new SimpleDateFormat("yyyy-MM-dd");
return df.format(dateObject);
}
}
// Go back to the MainActivity when up button in action bar is clicked on.
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
