Android uses Viewpager to start the app with the left and right swipe interface
/**
* 1. Load the Viewpager control in the layout Android.support.v4.view.ViewPager
* 2. Initialize Viewpager
* 3. Initialization of the data source
* 4. Create an adapter---> Inherit pageradapter override 4 methods
* 5. Bind Adapter
* 6. Setting Listener Events */
1. Load the Viewpager control in the layout Android.support.v4.view.ViewPager
<Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Tools:context=". Mainactivity " > Add Viewpager layout <Android.support.v4.view.ViewPager android:id= "@+id/vpager" A Ndroid:background= "@drawable/guide_1" android:layout_width= "Match_parent" Android:layout_height= "match_parent" ></ Android.support.v4.view.ViewPager> <ButtonAndroid:id= "@+id/enter"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_alignparentbottom= "true"Android:layout_centerhorizontal= "true"Android:layout_marginbottom= "20DP"Android:onclick= "OnEnter"android:visibility= "Gone"Android:text= "Enter" /></Relativelayout>
4. Create an adapter---> Inherit pageradapter override 4 methods
The main implementation of four methods
public int GetCount () //Gets the number of views loaded in the view
Determines whether a page view is determined to be related to the Instantiateitem returned by a particular focus object (Viewgroup,int). The method is a pageradapter normal need.
public boolean isviewfromobject (View arg0, Object arg1)
Add a View
Destroying views
public void Destroyitem (ViewGroup container, int position, object object)
Public class Mypageradapter extends Pageradapter {private List<View>list; Public Mypageradapter (List<View>list) {this.list = list; } @Override public int getcount () {return list.size (); } @Override public boolean isviewfromobject (View arg0, Object arg1) {return arg0 = = Arg1; }/** * Add view */public Object Instantiateitem (viewgroup container, int position) {View V = list.get ( position); Add the View object to the ViewGroup Container.addview (v); return v; }/** * Remove view */public void Destroyitem (ViewGroup container, int position, object object) {container . Removeview (List.get (position)); } }
2. Initialize Viewpager
* 3. Initialization of the data source
* 5. Bind Adapter
* 6. Setting Listener Events
Public class Mainactivity extends Activity implements Onpagechangelistener {private Viewpager viewpager; Data source Private List<View>list; Adapter private Mypageradapter Adapter; Button Btn3; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); Btn3 = (Button) Findviewbyid (r.id.enter); Viewpager = (Viewpager) Findviewbyid (R.id.vpager); List = new ArrayList<View>(); Inindata (); adapter = new Mypageradapter (list); Bind adapter Viewpager.setadapter (adapter); Set the monitoring Viewpager.setonpagechangelistener (this); /*new Handler (). postdelayed (New Runnable () {@Override public void run () {Intent in Tent = new Intent (mainactivity.this, One.class); StartActivity (Intent); Finish (); }}, (), */} public void Inindata () {ImageView iv1 = new ImageView (this); Iv1.setbackgroundresource (r.drawable.guide_1); List.add (IV1); ImageView iv2 = new ImageView (this); Iv2.setbackgroundresource (r.drawable.guide_2); List.add (IV2); ImageView iv3 = new ImageView (this); Iv3.setbackgroundresource (R.drawable.guide_3); List.add (IV3); ImageView iv4 = new ImageView (this); Iv4.setbackgroundresource (R.drawable.guide_4); List.add (IV4); } public void OnEnter (View V) {new Handler (). Post (new Runnable () {@Override public void run () {Intent Intent = new Intent (mainactivity.this, one.class); StartActivity (Intent); Finish (); } }); }/** * There are three states (0,1,2). * Arg0 ==1 's time is sliding, * the arg0==2 of the hour of the implied sliding, * arg0==0 of the hour implied that nothing has been done. */public void onpagescrollstatechanged (int arg0) {log.i ("tag", "onpagescrollstatechanged" +arg0); }/** * arg0: Current page, and the page you clicked to swipe arg1: percent of current page offset arg2: Pixel position of the current page offset */public void onpagescrolled (i NT arg0, float arg1, int arg2) {log.i ("tag", "onpagescrolled" +arg0+ "--" +arg1+ "--->" +arg2); }/** * This method is called after the page has been jumped, * arg0 is the position (position number) of the page you are currently selecting. */public void onpageselected (int arg0) {log.i ("tag", "onpageselected" +arg0); if (arg0 = = 3) {btn3.setvisibility (view.visible); } }}
Use Viewpager to display the upper ad campaign, add an asynchronous task,
Use Setcurrentitem (index) to set the current page
Class Myasynctask extends Asynctask<Void, void, void>{protected void Doinbackground (void ... params) {while (true) {//Determines whether the current asynchronous task is canceled if (iscancelled ()) {break; } try {thread.sleep (2000); Publishprogress (); } catch (Exception e) {e.printstacktrace (); }} return null; } protected void onprogressupdate (void ... values) {super.onprogressupdate (values); Viewpager.setcurrentitem (++index%4); if (index==4) {Intent Intent = new Intent (mainactivity.this, One.class); StartActivity (Intent); Finish (); index=0; Viewpager.removeallviews (); Viewpager.setcurrentitem (0); Add (); } } }
Android uses Viewpager to start the app with the left and right swipe interface