The use of Viewpager and fragment in Android _android

Small case

in XML

<android.support.v4.view.viewpager
  android:id= "@+id/viewpager"
  android:layout_width= "Match_parent"
  android:layout_height= "Match_parent" >
</android.support.v4.view.ViewPager>

Create fragment

 Fragments = new arraylist<> ();
 Conversationfragment fragment1 = new Conversationfragment ();
 Groupfragment Fragment2 = new Groupfragment ();
 Searchfragment Fragment3 = new Searchfragment ();
 Fragments.add (fragment1);
 Fragments.add (Fragment2);
 Fragments.add (FRAGMENT3);
 adapter = new Mainpageradapter (Getsupportfragmentmanager (), fragments);
 Viewpager.setadapter (adapter);

Adapter

public class Mainpageradapter extends fragmentpageradapter{

  list<fragment> fragmentlist;

  Public Mainpageradapter (Fragmentmanager FM, list<fragment> fragmentlist) {
    super (FM);
    This.fragmentlist = fragmentlist;
  }

  @Override public
  Fragment getitem (int position) {return
    fragmentlist.get (position);
  }

  @Override public
  int GetCount () {return
    fragmentlist.size ();
  }
}

Onpagechangelistener

Viewpager.addonpagechangelistener (New Viewpager.onpagechangelistener () {
  @Override public
  Void onpagescrolled (int position, float positionoffset, int positionoffsetpixels) {
    int distance = positionoffsetpixels/ 3;
    Once the fragment slide, the position here is actually the previous
    viewpropertyanimator.animate (v_indicate_line). Translationx (distance + Position * V_indicate_line.getwidth ()). Setduration (0);
  }

  @Override public
  void onpageselected (int position) {
    textlightandsize ();
  }


  @Override public
  void onpagescrollstatechanged (int state) {

  }
});

With other click events

Here is the note setcurrentitem usage
switch (View.getid ()) {case
  r.id.ly_conversation:
    Viewpager.setcurrentitem (0);
    break;
  Case R.id.ly_group:
    viewpager.setcurrentitem (1);
    break;
  Case R.id.ly_search:
    viewpager.setcurrentitem (2);
    break;

Official case

R.layout.fragment_pager

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android" android:orientation= "vertical" android:padding= "4dip" android:gravity= "Center_horizontal" android:layout_width= "Match_parent" Android:layout_hei ght= "Match_parent" > <android.support.v4.view.viewpager android:id= "@+id/pager" Match_parent "android:layout_height=" 0px "android:layout_weight=" 1 "> </android.support.v4.view.viewpag er> <linearlayout android:orientation= "horizontal" android:gravity= "center" android:measurewithlargestchild 
    = "true" android:layout_width= "Match_parent" android:layout_height= "wrap_content" android:layout_weight= "0" > <button android:id= "@+id/goto_first" android:layout_width= wrap_content "android:layout_height=" wrap_content "android:text=" @string/first > </Button> <button android:id= "@+id/goto_last" Android:layo Ut_width= "Wrap_content" Android:layout_height= "Wrap_content" android:text= "@string/last" > </Button> </LinearLayout> </linearlay

 Out>

R.layout.fragment_pager_list

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android" android:orientation= "vertical" Android:layout_width= "Match_parent" android:layout_height= "match_parent" android:background= "@android:d rawable/ Gallery_thumb "> <textview android:id=" @+id/text "android:layout_width=" Match_parent "android:layout_height=" Wrap_content "android:gravity=" Center_vertical|center_horizontal "android:textappearance="? android:attr/ Textappearancemedium "android:text=" @string/hello_world "/> <!--the frame layout is-here since we'll be sho Wing either the empty view or the list view. --> <framelayout android:layout_width= "match_parent" android:layout_height= "0dip" Android:layout_weigh t= "1" > <!--here is the list. 
    Since we are using a listactivity, we have to called it "@android: id/list" So listactivity'll find it--> <listview android:id= "@android: Id/list" android:layout_width= "Match_pareNT "android:layout_height=" Match_parent "android:drawselectorontop=" false/> <!--here is the view To show if the list is emtpy--> <textview android:id= "@android: Id/empty" android:layout_width= "Match_pare NT "android:layout_height=" Match_parent "android:textappearance="? Android:attr/textappearancemedium "and roid:text= "No items."

 /> </FrameLayout> </LinearLayout>

public class Fragmentpagersupport extends fragmentactivity {static final int num_items = 10;

  Myadapter Madapter;

  Viewpager Mpager;
    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);

    Setcontentview (R.layout.fragment_pager);

    Madapter = new Myadapter (Getsupportfragmentmanager ());
    Mpager = (Viewpager) Findviewbyid (R.id.pager);

    Mpager.setadapter (Madapter);
    Watch for button clicks.
    Button button = (button) Findviewbyid (R.id.goto_first);
      Button.setonclicklistener (New Onclicklistener () {public void OnClick (View v) {mpager.setcurrentitem (0);
    }
    });
    Button = (button) Findviewbyid (r.id.goto_last); Button.setonclicklistener (New Onclicklistener () {public void OnClick (View v) {Mpager.setcurrentitem (num_it
      EMS-1);
  }
    }); } public static class Myadapter extends Fragmentpageradapter {public myadapter (fragmentmanager FM) {Super (F
 m);   @Override public int GetCount () {return num_items;
    @Override public Fragment getitem (int position) {return arraylistfragment.newinstance (position);

    } public static class Arraylistfragment extends listfragment {int mnum;
     /** * Create A new instance of countingfragment, providing "num" * as an argument.

      */static arraylistfragment newinstance (int num) {arraylistfragment f = new arraylistfragment ();
      Supply num input as an argument.
      Bundle args = new Bundle ();
      Args.putint ("num", num);

      F.setarguments (args);
    return F;
     /** * When creating, retrieve this instance ' s number from its arguments.
      * * @Override public void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Mnum = getarguments ()!= null?
    Getarguments (). GETINT ("num"): 1; }/** * The Fragment ' s UI is just a simple text view showing its
     * Instance number. * * @Override public View Oncreateview (layoutinflater inflater, ViewGroup container, Bundle savedinstancest
      ATE) {View v = inflater.inflate (R.layout.fragment_pager_list, container, false);
      View TV = V.findviewbyid (R.id.text);
      ((TEXTVIEW) TV). SetText ("Fragment #" + mnum);
    return v; @Override public void onactivitycreated (Bundle savedinstancestate) {super.onactivitycreated (Savedinstanc
      Estate); Setlistadapter (New arrayadapter<string> (getactivity), Android.
    R.layout.simple_list_item_1, cheeses.scheesestrings)); @Override public void Onlistitemclick (ListView l, View v, int position, long id) {LOG.I ("fragmentlist",
    "Item clicked:" + ID);

 }
  }
}

Attention

Activity before 3.0 cannot be fragment. In order to be able to use fragment (SUPPORTV4), only fragmentactivity. An activity inherited by Fragmentactivity.

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