How to put listview inside fragment

Question

How can I put a list view in a fragment? I use the default project setting with a fixed tab.

This seems to not work and my application crashes.

Primary activity

import java.util.ArrayList; import java.util.HashMap; import java.util.Locale; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import android.app.ActionBar; import android.app.FragmentTransaction; import android.app.ListActivity; import android.app.ListFragment; import android.content.SharedPreferences; import android.os.Bundle; import android.os.StrictMode; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.Menu; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.Toast; public class MainActivity extends FragmentActivity implements ActionBar.TabListener { /** * The {@link android.support.v4.view.PagerAdapter} that will provide * fragments for each of the sections. We use a * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which * will keep every loaded fragment in memory. If this becomes too memory * intensive, it may be best to switch to a * {@link android.support.v4.app.FragmentStatePagerAdapter}. */ /** * The {@link ViewPager} that will host the section contents. */ ViewPager mViewPager; public final static String PREFS_NAME = "UserData"; @Override protected void onCreate(Bundle savedInstanceState) { //Only for safe mode StrictMode.ThreadPolicy policy = new StrictMode. ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); /***********************************USER***************************/ //Get User info (if exist) SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); String id = settings.getString("id", ""); String pass = settings.getString("pass", ""); SectionsPagerAdapter mSectionsPagerAdapter; //Else create New User if (id == "") { System.out.println("Create New User..."); UserRegistration.CreateUser(getApplicationContext()); } /**** OTHER*****/ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Set up the action bar. final ActionBar actionBar = getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Create the adapter that will return a fragment for each of the three // primary sections of the app. mSectionsPagerAdapter = new SectionsPagerAdapter( getSupportFragmentManager()); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); // When swiping between different sections, select the corresponding // tab. We can also use ActionBar.Tab#select() to do this if we have // a reference to the Tab. mViewPager .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { actionBar.setSelectedNavigationItem(position); } }); // For each of the sections in the app, add a tab to the action bar. for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) { // Create a tab with text corresponding to the page title defined by // the adapter. Also specify this Activity object, which implements // the TabListener interface, as the callback (listener) for when // this tab is selected. actionBar.addTab(actionBar.newTab() .setText(mSectionsPagerAdapter.getPageTitle(i)) .setTabListener(this)); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // When the given tab is selected, switch to the corresponding page in // the ViewPager. mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } /** * A {@link FragmentPagerAdapter} that returns a fragment corresponding to * one of the sections/tabs/pages. */ public class SectionsPagerAdapter extends FragmentPagerAdapter { public SectionsPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { // getItem is called to instantiate the fragment for the given page. // Return a DummySectionFragment (defined as a static inner class // below) with the page number as its lone argument. Fragment fragment = new DummySectionFragment(); Bundle args = new Bundle(); args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1); fragment.setArguments(args); return fragment; } @Override public int getCount() { // Show 5 total pages. return 5; } @Override public CharSequence getPageTitle(int position) { Locale l = Locale.getDefault(); switch (position) { case 0: return getString(R.string.title_section1).toUpperCase(l); case 1: return getString(R.string.title_section2).toUpperCase(l); case 2: return getString(R.string.title_section3).toUpperCase(l); case 3: return getString(R.string.title_section4).toUpperCase(l); case 4: return getString(R.string.title_section5).toUpperCase(l); } return null; } } /** * A dummy fragment representing a section of the app, but that simply * displays dummy text. */ public static class DummySectionFragment extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ public static final String ARG_SECTION_NUMBER = "section_number"; public DummySectionFragment() { } public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false); /***********************************CONTEST INC********************** String xmlURL; ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); xmlURL = URL; System.out.println("Case 1"); Document doc = XMLfunctions.XMLfromString(XMLfunctions.getXML(xmlURL)); NodeList nodes = doc.getElementsByTagName("contest"); for (int i = 0; i < nodes.getLength(); i++) { HashMap<String, String> map = new HashMap<String, String>(); Element e = (Element)nodes.item(i); map.put("id", XMLfunctions.getValue(e, "id")); map.put("name", XMLfunctions.getValue(e, "name")); map.put("subtitle",XMLfunctions.getValue(e, "subtitle")); mylist.add(map); System.out.println(mylist); } //new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, android.R.id.text1, actions); ListAdapter adapter = new SimpleAdapter(this.getActivity(), mylist , R.layout.contest_list, new String[] { "name", "subtitle" }, new int[] { R.id.item_title, R.id.item_subtitle }); ListFragment.setListAdapter(adapter); final ListView lv = getApplication().getActivity().getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { @SuppressWarnings("unchecked") HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position); Toast.makeText(this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_LONG).show(); } }); /*************************************END CONTEST*********************/ ContestList.GetList(getActivity(), 1, "mm", "njk"); //TextView dummyTextView = (TextView) rootView // .findViewById(R.id.section_label); String sectionNumb = Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)); int cat1; cat1 = Integer.parseInt(sectionNumb); switch (cat1) { case 1: break; case 2: break; case 3: break; case 4: break; case 5: break; } return rootView; } } } 

Class ContestList

 import java.util.ArrayList; import java.util.HashMap; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import android.app.ListActivity; import android.app.ListFragment; import android.content.Context; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.Toast; public class ContestList { public final static String PREFS_NAME = "UserData"; public static String GetList(Context context, int type, String id, String pass) { String xmlURL; ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); xmlURL = URL; System.out.println("Case 1"); Document doc = XMLfunctions.XMLfromString(XMLfunctions.getXML(xmlURL)); NodeList nodes = doc.getElementsByTagName("contest"); for (int i = 0; i < nodes.getLength(); i++) { HashMap<String, String> map = new HashMap<String, String>(); Element e = (Element)nodes.item(i); map.put("id", XMLfunctions.getValue(e, "id")); map.put("name", XMLfunctions.getValue(e, "name")); map.put("subtitle",XMLfunctions.getValue(e, "subtitle")); mylist.add(map); System.out.println(mylist); } //new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, android.R.id.text1, actions); ListAdapter adapter = new SimpleAdapter(context, mylist , R.layout.contest_list, new String[] { "name", "subtitle" }, new int[] { R.id.item_title, R.id.item_subtitle }); ((ListActivity) context).setListAdapter(adapter); final ListView lv = ((ListActivity) context).getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { @SuppressWarnings("unchecked") HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position); //Toast.makeText(Main.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_LONG).show(); } }); return "OK"; } public String adapter(ListAdapter adapter) {/* setListAdapter(adapter); final ListView lv = getApplication().getActivity().getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { @SuppressWarnings("unchecked") HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position); Toast.makeText(MainActivity.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_LONG).show(); } });*/ return "OK"; } } 

Activity_main layout:

  <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/pager" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" /> 

Layout Fragment_main_dummy:

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ListView android:id="@id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:drawSelectorOnTop="false" /> <TextView android:id="@id/android:empty" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="No data"/> <TextView android:id="@+id/item_title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:padding="2dp" android:textSize="20dp" /> <TextView android:id="@+id/item_subtitle" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="2dp" android:textSize="13dp" /> 

Does anyone know why my app crash? or is there an alternative for placing a list inside a fragment?

thanks

EDIT:

Error log

 03-20 12:53:31.219: E/AndroidRuntime(3104): FATAL EXCEPTION: main 03-20 12:53:31.219: E/AndroidRuntime(3104): java.lang.ClassCastException: com.time2win.MainActivity cannot be cast to android.app.ListActivity 03-20 12:53:31.219: E/AndroidRuntime(3104): at com.time2win.ContestList.GetList(ContestList.java:50) 03-20 12:53:31.219: E/AndroidRuntime(3104): at com.time2win.MainActivity$DummySectionFragment.onCreateView(MainActivity.java:241) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.view.ViewPager.populate(ViewPager.java:1012) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.view.ViewPager.populate(ViewPager.java:881) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1366) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.View.measure(View.java:15513) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.View.measure(View.java:15513) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.widget.LinearLayout.measureVertical(LinearLayout.java:847) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.View.measure(View.java:15513) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4827) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 03-20 12:53:31.219: E/AndroidRuntime(3104): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2176) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.View.measure(View.java:15513) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1874) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1089) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1265) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.Choreographer.doCallbacks(Choreographer.java:562) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.Choreographer.doFrame(Choreographer.java:532) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.os.Handler.handleCallback(Handler.java:725) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.os.Handler.dispatchMessage(Handler.java:92) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.os.Looper.loop(Looper.java:137) 03-20 12:53:31.219: E/AndroidRuntime(3104): at android.app.ActivityThread.main(ActivityThread.java:5039) 03-20 12:53:31.219: E/AndroidRuntime(3104): at java.lang.reflect.Method.invokeNative(Native Method) 03-20 12:53:31.219: E/AndroidRuntime(3104): at java.lang.reflect.Method.invoke(Method.java:511) 03-20 12:53:31.219: E/AndroidRuntime(3104): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 03-20 12:53:31.219: E/AndroidRuntime(3104): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 03-20 12:53:31.219: E/AndroidRuntime(3104): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

for this you can use ListFragment. this is well explained in the docs:

http://developer.android.com/reference/android/app/ListFragment.html

Vogela also has guidance on this:

http://www.vogella.com/articles/AndroidListView/article.html#listfragments

Answer 2

I got a way out!

 public class TopRatedFragment extends Fragment { private String[] mNames = { "Fabian", "Carlos", "Alex", "Andrea", "Karla", "Freddy", "Lazaro", "Hector", "Carolina", "Edwin", "Jhon", "Edelmira", "Andres" }; private String[] mAnimals = { "Perro", "Gato", "Oveja", "Elefante", "Pez", "Nicuro", "Bocachico", "Chucha", "Curie", "Raton", "Aguila", "Leon", "Jirafa" }; int[] flags = new int[]{ R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher }; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { List<HashMap<String,String>> aList = new ArrayList<HashMap<String,String>>(); for(int i=0;i<10;i++){ HashMap<String, String> hm = new HashMap<String,String>(); hm.put("txt", "App Name : " + mNames[i]); hm.put("cur","creator : " + mAnimals[i]); hm.put("flag", Integer.toString(flags[i]) ); aList.add(hm); } String[] from = { "flag","txt","cur" }; int[] to = { R.id.flag,R.id.txt,R.id.cur,R.id.textView2}; View v = inflater.inflate(R.layout.fragment_top_rated, container,false); ListView list = (ListView)v.findViewById(R.id.listView1); SimpleAdapter adapter = new SimpleAdapter(getActivity().getBaseContext(), aList, R.layout.listview_layout, from, to); list.setAdapter(adapter); return v; } } 

listview_layout.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal"> <ImageView android:id="@+id/flag" android:layout_width="wrap_content" android:layout_height="wrap_content" android:contentDescription="@string/hello_world" android:paddingTop="10dp" android:paddingRight="10dp" android:paddingBottom="10dp" /> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/txt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="15dp" /> <TextView android:id="@+id/cur" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="10dp" /> </LinearLayout> </LinearLayout> 

fragment_top_rated.xml

 <RelativeLayout 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/listView1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" > </ListView> </RelativeLayout> 

Answer 3

An example of a fragment that contains a list view with three elements. The key is onCreateView, do not forget to inflate the .xml fragment (fragment_list), and inside it will be a listView with the input "listView $ fragment_list $ lista"

  public class FragmentList extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,BundlesavedInstanceState) { View v = inflater.inflate(R.layout.fragment_list, container, false); ListView lstItems = (ListView)v.findViewById(R.id.listView$fragment_list$lista); ArrayList<String> prueba = new ArrayList<String>(); prueba.add("Element1"); prueba.add("Element2"); prueba.add("Element3"); ArrayAdapter<String> allItemsAdapter = new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_list_item_1,prueba); lstItems.setAdapter(allItemsAdapter); return v; } 

Answer 4

The error you get is related to trying to set the listadapter of the main action instead of the list.

In your competition list class, you do the following:

 ((ListActivity) context).setListAdapter(adapter); 

But the context is not for ListActivity, it is for MainActivity.

You do it like this:

 ContestList.GetList(getActivity(), 1, "mm", "njk"); 

But getActivity () means that it returns the main action, which is "MainActivity". You should rather change something to pass a listview instead of an activity context or find another way to pass the data you need.