View Item types

To view the type of an item in Android, first send a request to the server through httputil, convert the response string from the server to a jsonarray object, then use the adapter to wrap the jsonarray object, and use listview to display it.

View the layout page of the item type:
<? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: Orientation = "vertical" Android: gravity = "center" Android: layout_width = "match_parent" Android: layout_height = "match_parent"> <linearlayoutandroid: Orientation = "horizontal" Android: gravity = "center" Android: layout_width = "match_parent" Android: layout_height = "wrap_content" Android: layout_margin = "@ dimen/sub_title_margin"> <linearlayoutan Droid: Orientation = "vertical" Android: gravity = "center" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"> <textviewandroid: TEXT = "@ string/manage_kind" Android: textsize = "@ dimen/label_font_size" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content"/> <! -- Add a category button --> <buttonandroid: Id = "@ + ID/bnadd" Android: layout_width = "85dp" Android: layout_height = "30dp" Android: background = "@ drawable/add_kind"/> </linearlayout> <buttonandroid: Id = "@ + ID/bn_home" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: layout_marginleft = "@ dimen/label_font_size" Android: Background = "@ drawable/home"/> </linearlayout> <! -- Display the listview of the category list --> <listviewandroid: Id = "@ + ID/kindlist" Android: layout_width = "match_parent" Android: layout_height = "match_parent"/> </linearlayout>

Display the fragment code of the item type:

Public class managekindfragment extends Fragment

{Public static final int add_kind = 0x1007; button bnhome, bnadd; listview kindlist; callbacks mcallbacks; @ overridepublic view oncreateview (layoutinflater Inflater, viewgroup container, bundle savedinstancestate) {view rootview = Inflater. inflate (R. layout. manage_kind, container, false); // obtain the two buttons bnhome = (button) rootview in the interface layout. findviewbyid (R. id. bn_home); bnadd = (button) rootview. findviewbyid (R. id. BNA Dd); kindlist = (listview) rootview. findviewbyid (R. id. kindlist); // bind event listener bnhome to the Click Event of the return button. setonclicklistener (New homelistener (getactivity (); // bind the event listener bnadd to the Click Event of the Add button. setonclicklistener (New onclicklistener () {@ overridepublic void onclick (View Source) {// when the Add button is clicked, call the onitemselected method mcallbacks of the activity where the fragment is located. onitemselected (add_kind, null) ;}}); // defines the urlstring url = httputil. base_url + "View Kind. JSP "; try {// send a request to the specified URL and encapsulate the response into a jsonarray object final jsonarray = new jsonarray (httputil. getrequest (URL); // wrap the jsonarray object into adapterkindlist. setadapter (New kindarrayadapter (jsonarray, getactivity ();} catch (exception e) {dialogutil. showdialog (getactivity (), "Server Response exception. Please try again later! ", False); E. printstacktrace ();} return rootview;} // when the fragment is added and displayed to the activity, the method @ overridepublic void onattach (activity) {super. onattach (activity); // If activity does not implement the callbacks interface, an exception if (! (Activity instanceof callbacks) {Throw new illegalstateexception ("the activity where managekindfragment is located must implement the callbacks interface! ");} // Treat the activity as the callbacks object mcallbacks = (callbacks) activity ;} // when the fragment is deleted from the activity to which it belongs, the method @ overridepublic void ondetach () {super. ondetach (); // assign mcallbacks to null. Mcallbacks = NULL ;}}

　　

　　

View Item types