Android Listfragment Instance Demo (custom adapter)

The previous article introduced Listfragment, in which the ListView does not have a custom adapter, and actually often uses custom adapters in real-world development, which is a more complex list of data presentation. So this article added a custom adapter for the display of the ListView data.

Realize:

On the left is a button in the activity, and clicking on the button will show the corresponding data list on the right fragment.

Code Show:

Layout file:

Activity_main:

<linearlayout xmlns: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 "> <linearlayout android:id=" @+id/left "android:layout_width=" 0DP "Android:layo ut_height= "Match_parent" android:layout_weight= "1" android:orientation= "vertical" android:background            = "#DDCCFF" > <button android:id= "@+id/button1" android:layout_width= "Match_parent" android:layout_height= "Wrap_content" android:text= "Show list"/> </LinearLayout> <linearlayo UT android:id= "@+id/right" android:layout_width= "0DP" android:layout_height= "Match_parent" and roid:layout_weight= "2" android:orientation= "vertical" android:background= "#DDFFCC" > </linearlayout ></LinearLayout>

Article.xml:

<linearlayout xmlns: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 ">    <listview        android:id=" @id/android:list "        android:layout_width=" Match_parent "        android:layout_height= "Wrap_content" >    </ListView></LinearLayout>

Item.xml:

<linearlayout xmlns: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 ">   <textview        android:id=" @+id/textview "       android:layout_width=" Wrap_content       " android:layout_height= "Wrap_content"       android:textsize= "20SP"/></linearlayout>

Code files:

package Com.fragmentdemo9_listfragment2;import Android.app.activity;import Android.app.fragmentmanager;import Android.app.fragmenttransaction;import Android.os.bundle;import Android.view.view;import android.widget.Button;/*  * Example of *listfragment demo optimized version one. * */public class Mainactivity extends Activity {private Button button;private Fragmentmanager manager;private Fragmenttra Nsaction transaction; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate ); Setcontentview (r.layout.activity_main); manager = Getfragmentmanager (); button = (button) Findviewbyid (r.id.button1 ); Button.setonclicklistener (new View.onclicklistener () {@Overridepublic void OnClick (View v) {transaction = Manager.begintransaction (); Articlelistfragment articlelistfragment = new Articlelistfragment (); Transaction.replace (R.id.right, Articlelistfragment, "right"); Transaction.commit ();}});}} 
 

Articlelistfragment.java:

Package Com.fragmentdemo9_listfragment2;import Java.util.arraylist;import Android.app.listfragment;import Android.os.bundle;import Android.view.layoutinflater;import Android.view.view;import Android.view.ViewGroup; Import Android.widget.listview;import android.widget.toast;/** * The only one in this example fragment * @author Administrator * */public Class Articlelistfragment extends Listfragment {private Myadapter adapter;private arraylist<string> list = new Arra Ylist<string> (); @Overridepublic void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate) ; for (int i = 0; i < i++) {List.add ("item" + i);} adapter = new Myadapter (getactivity (), list);} @Overridepublic View Oncreateview (Layoutinflater inflater, ViewGroup container,bundle savedinstancestate) {View view = Inflater.inflate (r.layout.article, null); Setlistadapter (adapter); return view;} @Overridepublic void Onlistitemclick (ListView l, View v, int position, long id) {Super.onlistitemclick (L, V, position, id) ; Toast.maketeXT (Getactivity (), list.get (position), Toast.length_short). Show ();}} 

Myadapter:

Package Com.fragmentdemo9_listfragment2;import Java.util.arraylist;import Android.content.context;import Android.view.layoutinflater;import Android.view.view;import Android.view.viewgroup;import Android.widget.baseadapter;import android.widget.textview;/** * Custom Adapter Myadapter * */public class MyAdapter extends Baseadapter {Private arraylist<string> list;private context Context;public myadapter (context context, ArrayList <String> list) {this.list = List;this.context = Context;} @Overridepublic int GetCount () {return list.size ();} @Overridepublic Object getItem (int position) {return list.get (position);} @Overridepublic long Getitemid (int position) {return position;} @Overridepublic view GetView (int position, view Convertview, ViewGroup parent) {Viewholder holder = new Viewholder (); if (Convertview = = null) {Convertview = Layoutinflater.from (context). Inflate (r.layout.item,null); Holder.textview = ( TextView) Convertview.findviewbyid (R.id.textview); Convertview.settag (holder);} else {HolDer = (Viewholder) Convertview.gettag ();} Holder.textView.setText (List.get (position). ToString ()); return Convertview;} Class Viewholder {TextView TextView;}}

Source code Download:

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