Mobile Application Development MyRent Settings

Transcription

1 Mobile Application Development MyRent Settings Waterford Institute of Technology October 13, 2016 John Fitzgerald Waterford Institute of Technology, Mobile Application Development MyRent Settings 1/19

2 Overview Android Preference Framework facilites: Storage of list of key-value pairs Conventionally referred to as Settings Settings accessible from menu Settings pane presents user option to enter data Once entered, data persists key : value username : password Waterford Institute of Technology, Mobile Application Development MyRent Settings 2/19

3 Accessible from overflow menu Waterford Institute of Technology, Mobile Application Development MyRent Settings 3/19

4 Accessible from overflow menu Waterford Institute of Technology, Mobile Application Development MyRent Settings 4/19

5 User input pane Waterford Institute of Technology, Mobile Application Development MyRent Settings 5/19

6 Package layout - settings classes in own package Waterford Institute of Technology, Mobile Application Development MyRent Settings 6/19

7 Activity oncreate public class SettingsActivity extends AppCompatActivity protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); Waterford Institute of Technology, Mobile Application Development MyRent Settings 7/19

8 Activity Inflate menu public class SettingsActivity extends AppCompatActivity public boolean oncreateoptionsmenu(menu menu) { getmenuinflater().inflate(r.menu.residencelist, menu); return true; Waterford Institute of Technology, Mobile Application Development MyRent Settings 8/19

9 Add a settings menu item - residencelist.xml <menu> <item > </item> <item android:id="@+id/action_settings" android:orderincategory="100" app:showasaction="never" android:title="@string/settings"/> </menu> Waterford Institute of Technology, Mobile Application Development MyRent Settings 9/19

10 Fragment Launch public boolean onoptionsitemselected(menuitem item) { case R.id.action_settings: Intent intent = new Intent(getActivity()); startactivity(intent, SettingsActivity.class)); return true; Waterford Institute of Technology, Mobile Application Development MyRent Settings 10/19

11 Fragment UI declared in res/xml/settings.xml public class SettingsFragment extends PreferenceFragment public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); addpreferencesfromresource(r.xml.settings); Waterford Institute of Technology, Mobile Application Development MyRent Settings 11/19

12 UI File: settings.xml <PreferenceScreen xmlns:android=" > <EditTextPreference android:key="username" <EditTextPreference android:key="password" android:inputtype="textpassword"/> <EditTextPreference android:key="nmr_residences" android:inputtype="text"/> <EditTextPreference android:key="refresh_interval" android:inputtype="text"/> </PreferenceScreen> Waterford Institute of Technology, Mobile Application Development MyRent Settings 12/19

13 UI User interface screen Waterford Institute of Technology, Mobile Application Development MyRent Settings 13/19

14 SettingsFragment - Capture & persist user-input settings private SharedPreferences public void onstart() { super.onstart(); prefs = PreferenceManager.getDefaultSharedPreferences(getActivity()); Waterford Institute of Technology, Mobile Application Development MyRent Settings 14/19

15 SettingsFragment - listen for settings changes // Implement this interface OnSharedPreferenceChangeListener // Implement OnSharedPreferenceChangeListener public void onsharedpreferencechanged(sharedpreferences prefs, String key) { Waterford Institute of Technology, Mobile Application Development MyRent Settings 15/19

16 SettingsFragment - listen for settings public void onsharedpreferencechanged(sharedpreferences prefs, String key) { Log.d(TAG, "Key " + key + " " + prefs.getstring(key, "")); Waterford Institute of Technology, Mobile Application Development MyRent Settings 16/19

17 SettingsFragment - register and unregister public void onstart() { public void onstop() { prefs.unregisteronsharedpreferencechangelistener(this); Waterford Institute of Technology, Mobile Application Development MyRent Settings 17/19

18 Referenced Material 1. Android Documentation: Settings https: //developer.android.com/guide/topics/ui/settings.html [Accessed ] Waterford Institute of Technology, Mobile Application Development MyRent Settings 18/19

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