"Sail Plan 030" 2015 Sail plan Android Apidemo Devil step App->preferences->preferences from code

Here we use the analogy method, the preferenceactivity and the general activity to make an analogy, can better understand the various classes in the android.preference.

preferenceactivity	activity
preference	view
preferencegroup	viewgroup
preferencescreen	linearlayout
checkboxpreference	checkbox
edittextpreference	edittext
listpreference	list
preferencecategory	viewgroup
...

The UI of preferenceactivity is defined by preference and so on, like the contentview of activity, the UI of preferenceactivity can be defined by XML, or it can be defined using code. This example is to use code to define the Preferenceactivity UI. Some of the code is as follows:

@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate); Preferencescreen Root = Getpreferencemanager (). Createpreferencescreen (  This);        Setpreferencescreen (root);    Populatepreferencehierarchy (root); }    Private voidpopulatepreferencehierarchy (Preferencescreen root) {//Inline Preferences        preferencecategory inlineprefcat = new preferencecategory (this); Inlineprefcat.settitle (r.string.inline_preferences); Root.addpreference (INLINEPREFCAT); //Checkbox Preference        checkboxpreferenceCheckboxpref =NewCheckboxpreference ( This); Checkboxpref.setkey ("Checkbox_preference");        Checkboxpref.settitle (r.string.title_checkbox_preference);        Checkboxpref.setsummary (r.string.summary_checkbox_preference);        Inlineprefcat.addpreference (CHECKBOXPREF); //Switch Preference        switchpreferenceSwitchpref =NewSwitchpreference ( This); Switchpref.setkey ("Switch_preference");        Switchpref.settitle (r.string.title_switch_preference);        Switchpref.setsummary (r.string.summary_switch_preference);        Inlineprefcat.addpreference (SWITCHPREF); //Dialog based Preferences        preferencecategoryDialogbasedprefcat =NewPreferencecategory ( This);        Dialogbasedprefcat.settitle (r.string.dialog_based_preferences);        Root.addpreference (DIALOGBASEDPREFCAT); //Edit Text Preference        edittextpreferenceEdittextpref =NewEdittextpreference ( This);        Edittextpref.setdialogtitle (r.string.dialog_title_edittext_preference); Edittextpref.setkey ("Edittext_preference");        Edittextpref.settitle (r.string.title_edittext_preference);        Edittextpref.setsummary (r.string.summary_edittext_preference);        Dialogbasedprefcat.addpreference (EDITTEXTPREF); //List Preference        listpreferenceListpref =NewListpreference ( This);        Listpref.setentries (r.array.entries_list_preference);        Listpref.setentryvalues (r.array.entryvalues_list_preference);        Listpref.setdialogtitle (r.string.dialog_title_list_preference); Listpref.setkey ("List_preference");        Listpref.settitle (r.string.title_list_preference);        Listpref.setsummary (r.string.summary_list_preference);        Dialogbasedprefcat.addpreference (LISTPREF); //Launch Preferences        preferencecategoryLaunchprefcat =NewPreferencecategory ( This);        Launchprefcat.settitle (r.string.launch_preferences);        Root.addpreference (LAUNCHPREFCAT); /** The Preferences Screenpref serves as a screens break (similar to page * broke in word processing). L         IKE for other preference types, we assign * a key where so, it's able to save and restore their instance state. */        //Screen PreferencePreferencescreen screenpref = Getpreferencemanager (). Createpreferencescreen ( This); Screenpref.setkey ("Screen_preference");        Screenpref.settitle (r.string.title_screen_preference);        Screenpref.setsummary (r.string.summary_screen_preference);        Launchprefcat.addpreference (SCREENPREF); /** Can add more preferences to screenpref that'll be shown on the * next screen. childcheckboxpref.setdependency (parent_checkbox_preference);          */        //Example of next screen toggle preferenceCheckboxpreference Nextscreencheckboxpref =NewCheckboxpreference ( This); Nextscreencheckboxpref.setkey ("Next_screen_toggle_preference");        Nextscreencheckboxpref.settitle (r.string.title_next_screen_toggle_preference);        Nextscreencheckboxpref.setsummary (r.string.summary_next_screen_toggle_preference);        Screenpref.addpreference (NEXTSCREENCHECKBOXPREF); //Intent Preference        PreferencescreenIntentpref = Getpreferencemanager (). Createpreferencescreen ( This); Intentpref. setintent (NewIntent (). Setaction (Intent.action_view). SetData (Uri.parse ("Http://www.android.com")));        Intentpref.settitle (r.string.title_intent_preference);        Intentpref.setsummary (r.string.summary_intent_preference);        Launchprefcat.addpreference (INTENTPREF); //Preference AttributesPreferencecategory Prefattrscat =NewPreferencecategory ( This);        Prefattrscat.settitle (r.string.preference_attributes);        Root.addpreference (PREFATTRSCAT); //Visual Parent Toggle PreferenceCheckboxpreference Parentcheckboxpref =NewCheckboxpreference ( This);        Parentcheckboxpref.settitle (r.string.title_parent_preference);        Parentcheckboxpref.setsummary (r.string.summary_parent_preference);        Prefattrscat.addpreference (PARENTCHECKBOXPREF);        Parentcheckboxpref.setkey (parent_checkbox_preference); //Visual Child Toggle Preference//See Res/values/attrs.xml for the <declare-styleable> that defines//Toggleprefattrs.TypedArray A =obtainstyledattributes (r.styleable.toggleprefattrs); Checkboxpreference Childcheckboxpref=NewCheckboxpreference ( This);        Childcheckboxpref.settitle (r.string.title_child_preference);        Childcheckboxpref.setsummary (r.string.summary_child_preference); Childcheckboxpref.setlayoutresource (A.getresourceid (r.styleable.toggleprefattrs_android_preferencelayoutch ILD,0));        Prefattrscat.addpreference (CHILDCHECKBOXPREF);        childcheckboxpref.setdependency (parent_checkbox_preference);    A.recycle (); }

Basically, it corresponds to using XML definition one by one.

Sail Plan 030 2015 sail plan Android Apidemo Devil Step app->preferences->preferences from code