Android uses broadcasts to achieve data communication between item in Viewpager

When you implement communication between fragment (for example, Fragment_a and Fragment_b), you might think of a way to provide an interface in Fragment_b, and then call the interface in Fragment_a and pass the required parameters in the past.

I'm going to use broadcast to deliver data from Fragment_a to Fragment_b.

Main interface:

public class Mainactivity extends fragmentactivity {private int getlayoutresid () {return R.layout.activity_mai    N    } private Myviewpageradapter madapter = null;    Private final int start_item = 0;        Private Viewpager Mdataviewpager = null;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        This.requestwindowfeature (Window.feature_no_title);                Setcontentview (Getlayoutresid ());    Initevent ();    }/** * Initialize event */private void Initevent () {Initview ();    }/** * Initialization interface */private void Initview () {initwidgets (); }/** * Initialize control */private void Initwidgets () {Mdataviewpager = (Viewpager) Findviewbyid (r.id.acti                Vity_main_show_viewpager);        Madapter = new Myviewpageradapter (Getsupportfragmentmanager ());        Madapter.setcontext (Mainactivity.this);       Mdataviewpager.setadapter (Madapter); Mdataviewpager.setcurrentitem (Start_item); }}

Adapter:

public class Myviewpageradapter extends Fragmentstatepageradapter {public static final int Fragment_viewpager_page_ COUNT = 2;private Context mcontext;public myviewpageradapter (fragmentmanager FM) {super (FM);} public void SetContext (context context) {        Mcontext = context;    } @Overridepublic Fragment getItem (int which) {try {switch (which) {case 0:return pageonefragment.newinstance (), Case 1: Return pagetwofragment.newinstance ();d efault:break;}} catch (Exception e) {    e.printstacktrace ();} return pageonefragment.newinstance ();} @Overridepublic int GetCount () {return fragment_viewpager_page_count;}}

The first of the fragment:

public class Pageonefragment extends Fragment {public static pageonefragment newinstance () {pageonefragment Fragment = new Pageonefragment (); return fragment;} private int Getlayoutresid () {return r.layout.fragment_page_0;} public static final String TAG = PageOneFragment.class.getName ();p rivate TextView mshowtextview = null;private Button Msen Dbutton = null;private static final int message_updateview = 0x123;private Pagetwodatachangedreceiver mReceiver = null;pub Lic static final String data_changed = "Com.example.viewpager.communication.fragment.PAGE_ONE_DATA_CHANGED"; Overridepublic View Oncreateview (Layoutinflater inflater, ViewGroup container,bundle savedinstancestate) {View view = Inflater.inflate (Getlayoutresid (), container, false); initevent (view); return view;} private void Initevent (View v) {Initview (v); Registerpagetwodatachangedreceiver ();} private void Initview (View v) {initwidgets (v); Setviewonclickevent ();} private void Initwidgets (View v) {Mshowtextview = (TextView) v.findViewbyid (R.id.page_0_show_textview); Msendbutton = (Button) V.findviewbyid (R.id.page_0_send_button);} /** * Click on all buttons to monitor */private void Setviewonclickevent () {Msendbutton.setonclicklistener (viewonclicklistener);} Private Onclicklistener Viewonclicklistener = new Onclicklistener () {@Overridepublic void OnClick (View v) {switch (V.geti    D ()) {case R.id.page_0_send_button:intent Intent = new Intent ();    Intent.setaction (pagetwofragment.data_changed); Getactivity (). Sendbroadcast (intent); break;default:break;}};    private void Registerpagetwodatachangedreceiver () {intentfilter filter = new Intentfilter ();            try {if (mreceiver! = null) {getactivity (). Unregisterreceiver (Mreceiver);        }} catch (Exception e) {e.printstacktrace ();    } mreceiver = new Pagetwodatachangedreceiver ();    Filter.addaction (pageonefragment.data_changed); Getactivity (). Registerreceiver (mreceiver, filter);} Handler Handler = new Handler () {public void Handlemessage (Message msg) {switch (msg.what) {case Message_updateview:updateview ((String) msg.obj); ;d efault:break;};}; private void Updateview (String data) {Mshowtextview.settext ("from the second page:" + Data + "" + System.currenttimemillis ());} Class Pagetwodatachangedreceiver extends Broadcastreceiver {@Override public void onreceive (context context  , Intent Intent) {if (Intent.getaction (). Equals (pageonefragment.data_changed)) {String label =                "Both time:";                Message msg = new Message ();                Msg.what = Message_updateview;                msg.obj = label;            Handler.sendmessage (msg); }}} @Overridepublic void OnDestroy () {if (mreceiver! = null) {getactivity (). Unregisterreceiver (MRec        Eiver); } Super.ondestroy ();}}

a second fragment:

public class Pagetwofragment extends Fragment {public static pagetwofragment newinstance () {pagetwofragment Fragment = new Pagetwofragment (); return fragment;} private int Getlayoutresid () {return r.layout.fragment_page_1;} public static final String TAG = PageTwoFragment.class.getName ();p rivate static final int message_updateview = 0x123;priva    Te TextView mshowtextview = null; Private Button Msendbutton = null;private pageonedatachangedreceiver mreceiver = null;public static final String Data_chan GED = "Com.example.viewpager.communication.fragment.PAGE_TWO_DATA_CHANGED"; @Overridepublic View Oncreateview ( Layoutinflater Inflater, ViewGroup container,bundle savedinstancestate) {View view = Inflater.inflate (GetLayoutResID () , container, false); initevent (view); return view;} private void Initevent (View v) {Initview (v); Registerpageonedatachangedreceiver ();} private void Initview (View v) {initwidgets (v); Setviewonclickevent ();} private void Initwidgets (View v) {Mshowtextview = (TextView) v.findViewbyid (R.id.page_1_show_textview); Msendbutton = (Button) V.findviewbyid (R.id.page_1_send_button);} /** * Click on all buttons to monitor */private void Setviewonclickevent () {Msendbutton.setonclicklistener (viewonclicklistener);} Private Onclicklistener Viewonclicklistener = new Onclicklistener () {@Overridepublic void OnClick (View v) {switch (V.geti                D ()) {case R.id.page_1_send_button:intent Intent = new Intent ();                Intent.setaction (pageonefragment.data_changed);    Getactivity (). Sendbroadcast (intent); break;default:break;}};        private void Registerpageonedatachangedreceiver () {intentfilter filter = new Intentfilter ();            try {if (mreceiver! = null) {getactivity (). Unregisterreceiver (Mreceiver);        }} catch (Exception e) {e.printstacktrace ();        } mreceiver = new Pageonedatachangedreceiver ();        Filter.addaction (pagetwofragment.data_changed); Getactivity (). registerreceIver (mreceiver, filter); } Handler Handler = new Handler () {public void Handlemessage (Message msg) {switch (msg.what) {case Message_updateview:u Pdateview (String) msg.obj); break;default:break;};}; private void Updateview (String data) {mshowtextview.settext ("data sent from the first page:" + Data + "" + System.currenttimemillis ()    ); } class Pageonedatachangedreceiver extends Broadcastreceiver {@Override public void OnReceive (Context Co ntext, Intent Intent) {if (Intent.getaction (). Equals (pagetwofragment.data_changed)) {String LA                Bel = "One time:";                Message msg = new Message ();                Msg.what = Message_updateview;                msg.obj = label;            Handler.sendmessage (msg); }}} @Override public void OnDestroy () {if (mreceiver! = null) {getactivity (). Unregis        Terreceiver (Mreceiver);    } Super.ondestroy (); }}

Project Source:

The layout file is relatively simple and is not given here. The following is the project source code.

http://download.csdn.net/detail/u013761665/8333283

the author's latest development of application connection

Http://zhushou.360.cn/detail/index/soft_id/2419729?recrefer=SE_D_%E6%A3%B1%E9%95%9C

Http://www.wandoujia.com/apps/com.mastershield.personalstat

Android uses broadcasts to achieve data communication between item in Viewpager