Viewpager+fragment implementation of Android in the screen left and right switch (Advanced article)

Fragment supports the use of different activity and can handle its own input events and life cycle methods. Can be seen as a child activity.

First look at the layout:

1<LinearLayoutXmlns:android= "Http://schemas.android.com/apk/res/android"2Xmlns:tools= "Http://schemas.android.com/tools"3Android:layout_width= "Match_parent"4Android:layout_height= "Match_parent"5Tools:context=". Viewpageractivity ">67<Android.support.v4.view.ViewPager8android:id= "@+id/viewpager"  android:layout_width = "wrap_content" 10 = "wrap_content" 11  Android:layout_gravity= "center" >12 </android.support.v4.view.viewpager>13 14 </linearlayout>          

Main file: viewpageractivity inheritance Fragmentactivity

1PackageCom.example.viewpagerdemo;23ImportJava.util.ArrayList;4ImportJava.util.List;56ImportAndroid.os.Bundle;7ImportAndroid.support.v4.app.Fragment;8Importandroid.support.v4.app.FragmentActivity;9ImportAndroid.support.v4.view.ViewPager;1011ImportCom.example.adapter.fragmentAdapter;1213PublicClass ViewpageractivityExtendsfragmentactivity {1415@Override16ProtectedvoidOnCreate (Bundle savedinstancestate) {17Super. OnCreate (Savedinstancestate);18Setcontentview (R.layout.activity_view_pager);list<fragment> fragments =New arraylist<fragment>();20for (int i = 0; I < 3; i++) {Fragment f =new Buttonfragment ();   Fragments.add (f); }24 viewpager VP = ( Viewpager) Findviewbyid (R.id.viewpager); 25 fragmentadapter fa = new  Fragmentadapter (Getsupportfragmentmanager (), 26 Span style= "color: #000000;" > fragments); 27  Vp.setadapter (FA); }30}       

New Fragmentadapter inheritance Fragmentpageradapter does not write the implementation method

1PackageCom.example.adapter;23ImportJava.util.List;45ImportAndroid.support.v4.app.Fragment;6ImportAndroid.support.v4.app.FragmentManager;7ImportAndroid.support.v4.app.FragmentPagerAdapter;89PublicClass FragmentadapterExtendsFragmentpageradapter {10Private list<fragment>fragments;11PrivateFragmentmanager FM;1213Public Fragmentadapter (Fragmentmanager FM, list<fragment>Fragments) {14Super(FM);15This.fragments =fragments;1617}1819PublicFragmentadapter (fragmentmanager FM) {20Super(FM);21stThis.fm =Fm22}2324@Override25public Fragment GetItem (int  arg0) {26 return Fragments.get (arg0); 27 }28 29  @Override 30 public int GetCount () {31 Span style= "color: #0000ff;" >return Fragments.size (); }33 34}   

Define the fragment content to be displayed, and place a button in it

1PackageCom.example.viewpagerdemo;23ImportAndroid.os.Bundle;4ImportAndroid.support.v4.app.Fragment;5ImportAndroid.view.LayoutInflater;6ImportAndroid.view.View;7ImportAndroid.view.ViewGroup;8ImportAndroid.widget.TextView;910PublicClass Buttonfragmentextends Fragment {11 Span style= "color: #0000ff;" >private View rootview; 12 13  @Override 14 public15  Bundle savedinstancestate) {16 Rootview = Inflater.inflate (R.layout.guide1, container, false); 17 return rootview;18 Span style= "color: #000000;" >}19}                 

The implementation of 3 contains a button can be switched left and right

Viewpager+fragment implementation of Android in the screen left and right switch (Advanced article)