android fragment tutorial

(). SetText ("Tab 3 "). SetIcon (Android. R.drawable.ic_menu_agenda). Settablistener (New Actiontablistener (FRAGMENT3)); Actionbar.addtab (TAB1); Actionbar.addtab (TAB2); Actionbar.addtab (TAB3);} Class Actiontablistener implements Actionbar.tablistener {//Declaration fragmentprivate Fragment fragment;// Reference the corresponding Fragmentpublic Actiontabliste

directly bound to the activity containing it. Special fragment can use getActivity () to access the Activity instance, and it is easy to execute a task such as searching for a view in activity layout. The following code: View listView = getActivity (). findViewById (R. id. list); similarly, the activity can call methods in Fragment by obtaining a reference from FragmentManager to use findFragmentById () or

:textview1.append ("Ha"); Break;case R . id.button21: if (Myfragmenttwoclick! = null) {Myfragmenttwoclick.onmytwobtnclick (); } Break;}}}Main activity implementation:public class Mainactivity extends Activity implements Myfragmentoneclick,myfragmenttwoclick {relativelayout r1; Relativelayout R2; Relativelayout R3; Relativelayout view = null; Myfragment F1; MyFragment2 F2; MyFragment3 f3; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontent

Many times, an application has multiple function points, which are classified into different categories. Such a requirement exists. Different la s display different functions, fragment and ViewPager are a good helper. Fragment is a feature provided after 3.0. Therefore, if you want to use Fragment before 3.x, you need to use the support v4 package. After upgradin

Problem analysishas been in the book to see other people's technical stickers, today I also write some of their own experience! Recently in writing a project with a lot of fragment after the summary!I think the students who have just contacted Android may write:Fragmentmanager fragmentmanager=getsupportfragmentmanager (); Fragmenttransaction fragmenttransaction=fragmentmanager.begintransaction (); Fragm

onpagestarted (WebView view, String URL, Bitmap favicon) {super.onpagestarted (view, URL, favicon);} @Overridepublic void onpagefinished (WebView view, String URL) {super.onpagefinished (view, URL);} @Overridepublic void Onreceivederror (WebView view, int ErrorCode, string description, String failingurl) {super.onreceivederror (view, ErrorCode, description, failingurl);} }}Reprint please indicate source: http://blog.csdn.net/goldenfish1919/article/details/47661443Test code:1. Initialize Viewpag

Android ViewPager + Fragment sliding tab, tab click tab, androidviewpager I have been studying this for a while. Since Android 3.0, few developers have used the previous TabWidget control. The effect is not very good and cannot be slide. Later, various sliding tabs emerged, each of which had its own advantages. However, we recommend that you slide the ViewPager +

savedInstanceState ){View v = inflater. inflate (R. layout. hello_world, container, false );View TV = v. findViewById (R. id. text );(TextView) TV). setText (mLabel! = Null? MLabel: "(no label )");TV. setBackgroundDrawable (getResources (). getDrawable (android. R. drawable. gallery_thumb ));Return v;}} Note that the styleable resource is used to parse XML attributes. The XML Declaration used by styleable is as follows: Then, within the content layo

First, if you want to use fragment in android3.0 and the following versions, you must quote Android-support-v4.jar this packageThen you write the activity can no longer inherit from the activity class, but to inherit Android.support.v4.app.FragmentActivity, some other parent classes also have corresponding changes.Because fragment and activity are instantiated in

When we design the application, we hope to be able to do our best to fit a variety of devices, including 4-inch screen, 7-inch screen, 10-inch screen and so on, Android development documentation for our reference, and Google Io app (ii) also realized this idea, they are using layout, Layout-large is implemented in different layout files. When designing applications, you can reuse fragment in different layou

if the user switches to another fragmentThe overloaded method that determines whether fragment is visible @override public void Setuservisiblehint (Boolean isvisibletouser) {Super.setuservisiblehint ( Isvisibletouser); if (!isvisibletouser) mhandler.removecallbacks (load_data); }(3) NoteUsing Setuservisiblehint to determine if a user is switching to another fragment, there is a flaw because the delay task

Fragment injection of Android framework attacks To adapt to the increasing screen size of devices, Android introduced the Fragment concept after 3. X to display multiple activities on one screen at the same time to make full use of the screen. For instructions on Fragment, r