Calling Custom ListView Adapter from Fragment Class Main Activity

Calling Custom ListView Adapter from Fragment Class Main Activity - android

I've written a few listView activities, as a proof of concept for myself that I could do it. Now, I'm having trouble loading a listView activity into a single tab for an app with multiple tabs, that allows both swiping and tab selection for navigation. I get the error "The constructor ListView_Adapter(MainActivity.DummySectionFragment) is undefined" when I try to write the code for it. I'm a beginner, and I've lurked pretty hard here for the past few days. Any help is appreciated.
TL;DR : I'm a n00b, and I can't figure out this problem.
My Custom List Adapter
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class CustomListViewAdapter extends ArrayAdapter<String> {
public CustomListViewAdapter (Context c) {
super(c, R.layout.list_cell);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ListView_Text holder = null;
if (row == null)
{
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.list_cell, parent, false);
holder = new ListView_Text(row);
row.setTag(holder);
}
else
{
holder = (ListView_Text) row.getTag();
}
holder.populateFrom(getItem(position));
return row;
}
static class ListView_Text {
private TextView cell_name = null;
ListView_Text(View row) {
cell_name = (TextView) row.findViewById(R.id.list_cell_name);
}
void populateFrom(String index) {
cell_name.setText(index);
}
}
}
My Main Activity
import java.util.Locale;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import com.example.twigglebeta2.ListView_Adapter;
import android.os.Bundle;
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.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends FragmentActivity implements ActionBar.TabListener {
private static ListView_Adapter listViewAdapter;
private ListView listView;
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set up the action bar.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create adapter
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// Switch tab selection to match current page when swiped
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// Create a tab for each 'count' in the activity from getCount()
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
Tab thisTab = actionBar.newTab();
thisTab.setText(mSectionsPagerAdapter.getPageTitle(i));
thisTab.setTabListener(this);
actionBar.addTab(thisTab);
}
}
#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 3 total pages.
return 3;
}
#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);
}
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() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy,container, false);
switch(getArguments().getInt(ARG_SECTION_NUMBER)){
case 1:
//The constructor ListView_Adapter(MainActivity.DummySectionFragment) is undefined
listViewAdapter = new ListView_Adapter(this);
ListView listView = (ListView) rootView.findViewById(R.id.listView1);
for (int i=0;i<20;i++)
{
listViewAdapter.add("this Index : "+i);
}
return listView;
}
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}

Instead of listViewAdapter = new ListView_Adapter(this);, you should instead try listViewAdapter = new ListView_Adapter(getActivity().getBaseContext());
The Issue is that you are passing a Fragment to the constructor, and not an Activity context.

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after search and search, i develop my woner layour with propierties...
This class help tu implements a #SlidePage into Fragment.
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.ArrayList;
import java.util.List;
import mijem.bitgray.us.mijem_android.R;
public class FragmentTutorial extends Fragment {
/**
* The number of pages (wizard steps) to show in this demo.
*/
private static final int NUM_PAGES = 3;
/**
* The pager widget, which handles animation and allows swiping horizontally
* to access previous and next wizard steps.
*/
private ViewPager mPager;
/**
* The pager adapter, which provides the pages to the view pager widget.
*/
private PagerAdapter mPagerAdapter;
ImageView indicator0;
ImageView indicator1;
ImageView indicator2;
List<ImageView> listIndicators = new ArrayList<ImageView>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
ViewGroup rootView = (ViewGroup) inflater.inflate(
R.layout.fragment_viewpager_tutorial, container, false);
// Instantiate a ViewPager and a PagerAdapter.
mPager = (ViewPager) rootView.findViewById(R.id.pager);
mPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
resetIndicators();
listIndicators.get(mPager.getCurrentItem()).setImageResource(
R.drawable.indicador_slide_on);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
mPagerAdapter = new ScreenSlidePagerAdapter(getActivity()
.getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
indicator0 = (ImageView) rootView.findViewById(R.id.indicator0);
indicator1 = (ImageView) rootView.findViewById(R.id.indicator1);
indicator2 = (ImageView) rootView.findViewById(R.id.indicator2);
listIndicators.add(indicator0);
listIndicators.add(indicator1);
listIndicators.add(indicator2);
return rootView;
}
#Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
//TabListener.onResumeFragment(this);
}
public void resetIndicators() {
for (ImageView img : listIndicators)
img.setImageResource(R.drawable.indicador_slide_off);
}
/**
* A simple pager adapter that represents 5 ScreenSlidePageFragment objects,
* in sequence.
*/
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
fragment.setPosition(position);
return fragment;
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
}
enter code here
and the adapter:
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
fragment.setPosition(position);
return fragment;
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
enter code here
Code of fragmen pattern
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.ArrayList;
import java.util.List;
import mijem.bitgray.us.mijem_android.R;
public class FragmentTutorial extends Fragment {
/**
* The number of pages (wizard steps) to show in this demo.
*/
private static final int NUM_PAGES = 3;
/**
* The pager widget, which handles animation and allows swiping horizontally
* to access previous and next wizard steps.
*/
private ViewPager mPager;
/**
* The pager adapter, which provides the pages to the view pager widget.
*/
private PagerAdapter mPagerAdapter;
ImageView indicator0;
ImageView indicator1;
ImageView indicator2;
List<ImageView> listIndicators = new ArrayList<ImageView>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
ViewGroup rootView = (ViewGroup) inflater.inflate(
R.layout.fragment_viewpager_tutorial, container, false);
// Instantiate a ViewPager and a PagerAdapter.
mPager = (ViewPager) rootView.findViewById(R.id.pager);
mPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
resetIndicators();
listIndicators.get(mPager.getCurrentItem()).setImageResource(
R.drawable.indicador_slide_on);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
mPagerAdapter = new ScreenSlidePagerAdapter(getActivity()
.getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
indicator0 = (ImageView) rootView.findViewById(R.id.indicator0);
indicator1 = (ImageView) rootView.findViewById(R.id.indicator1);
indicator2 = (ImageView) rootView.findViewById(R.id.indicator2);
listIndicators.add(indicator0);
listIndicators.add(indicator1);
listIndicators.add(indicator2);
return rootView;
}
#Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
//TabListener.onResumeFragment(this);
}
public void resetIndicators() {
for (ImageView img : listIndicators)
img.setImageResource(R.drawable.indicador_slide_off);
}
/**
* A simple pager adapter that represents 5 ScreenSlidePageFragment objects,
* in sequence.
*/
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
fragment.setPosition(position);
return fragment;
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
}

ListFragment doesn't re-display data when calling it from FragmentStatePagerAdapter

Here's my UI hierarchy:
Main Fragment -> Fragment with ActionBar.TabListener -> Fragment with FragmentStatePagerAdapter -> ListFragment
The issue is that the ListFragment does display the first time I go into the tab of the ListFragment, but it does not display the second time (so going to tab 2 displays it, but then going to tab 1 and then tab 2 it doesn't display itself. The ListFragment is in tab 2).
This layout works fine if I remove the FragmentStatePagerAdapter, but now my project requires pages, so I needed to add the FragmentStatePagerAdapter to make the paging work.
However, at this point I dont really know what the problem is. I dont know if the issue is in the FragmentStatePagerAdapter, the ListFragment or if the phone just for some reason looses the data of the ListFragment.
I do know that getItem in FragmentStatePagerAdapter does not get called again when switching tabs.
Here's my code for the TrendsPagerHolder and FragmentStatePagerAdapter (as inner class):
import java.util.ArrayList;
import java.util.Collections;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Fragment;
import android.os.Bundle;
import android.app.FragmentManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v13.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class TrendsPagerHolder extends Fragment
{
private ArrayList<String>testArray = new ArrayList<String>();
private Context context;
private SharedPreferences preferences;
private Bundle applicationStatus;
// The number of pages to display
private static final int NUM_PAGES = 3;
private ViewPager pager;
//The pager adapter, which provides the pages to the view pager widget
private PagerAdapter pagerAdapter;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
context = getActivity().getApplicationContext();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
context = inflater.getContext();
applicationStatus = savedInstanceState;
View rootView = (View) inflater.inflate(R.layout.trends_screen_slider, container, false);
System.out.println("in TrendsPagerHolder onCreateView");
pager = (ViewPager) rootView.findViewById(R.id.trends_pager);
pagerAdapter = new ScreenSlidePagerAdapter(getFragmentManager());
pager.setAdapter(pagerAdapter);
pager.setCurrentItem(0);
return rootView;
}
public class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter
{
TrendsLV[] arrayOfTrendsFragments;
public ScreenSlidePagerAdapter(FragmentManager fragmentManager)
{
super(fragmentManager);
testArray.add("One");
testArray.add("Two");
testArray.add("Three");
arrayOfTrendsFragments = new TrendsLV[NUM_PAGES];
arrayOfTrendsFragments[0] = new TrendsLV(testArray, 0);
arrayOfTrendsFragments[1] = new TrendsLV(testArray, 1);
arrayOfTrendsFragments[2] = new TrendsLV(testArray, 2);
}
#Override
public Fragment getItem(int position)
{
System.out.println("in getItem. Position = " + position);
return arrayOfTrendsFragments[position];
}
#Override
public int getCount()
{
return NUM_PAGES;
}
}
}
Here's the code for my ListFragment:
import java.util.ArrayList;
import java.util.Collections;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListFragment;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.AsyncTask.Status;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class TrendsLV extends ListFragment
{
private Context context;
private ArrayList<String>testArray;
private Bundle applicationStatus;
private int pageIndex;
public TrendsLV(ArrayList<String> test, int index)
{
testArray = test;
pageIndex = index;
}
public TrendsLV()
{
// required
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
context = inflater.getContext();
applicationStatus = savedInstanceState;
System.out.println("in TrendsLV onCreateView");
if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
{
if (testArray != null)
{
TrendsListAdapter adapter = new TrendsListAdapter(context, testArray, pageIndex);
setListAdapter(adapter);
}
}
return super.onCreateView(inflater, container, savedInstanceState);
}
}//end class TrendsLV
And here's the code for the Adapter that is called from the ListFragment:
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class TrendsListAdapter extends ArrayAdapter<String>
{
private Context context;
private ArrayList<String>testArray;
private int pageIndex;
public TrendsListAdapter (Context c, ArrayList<String> test, int index)
{
super(c, R.layout.trends_row, test);
context = c;
testArray = test;
pageIndex = index;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.trends_row, parent, false);
TextView label_totalArea = (TextView) rowView.findViewById(R.id.trends_labelTotalArea);
label_totalArea.setText(context.getResources().getString(R.string.stringTotalArea));
return rowView;
}
}
Let me know if you need additional information to solve this issue.
I am testing it on a device using Android 4.4.4.
Thank you.

If you are inflating Fragment inside Fragment you should use getChildFragmentManager() instaed of getFragmentManager().
Here is the doc : http://developer.android.com/reference/android/app/Fragment.html#getChildFragmentManager()
public class TrendsPagerHolder extends Fragment
{
private ArrayList<String>testArray = new ArrayList<String>();
private Context context;
private SharedPreferences preferences;
private Bundle applicationStatus;
// The number of pages to display
private static final int NUM_PAGES = 3;
private ViewPager pager;
//The pager adapter, which provides the pages to the view pager widget
private PagerAdapter pagerAdapter;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
context = getActivity().getApplicationContext();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
context = inflater.getContext();
applicationStatus = savedInstanceState;
View rootView = (View) inflater.inflate(R.layout.trends_screen_slider, container, false);
System.out.println("in TrendsPagerHolder onCreateView");
pager = (ViewPager) rootView.findViewById(R.id.trends_pager);
pagerAdapter = new ScreenSlidePagerAdapter(getChildFragmentManager());
pager.setAdapter(pagerAdapter);
pager.setCurrentItem(0);
return rootView;
}

I think you should create the instance of ListFragment and use that instance in FragmentStatePagerAdapter.. some thing like this..
In Your TrendsLV class , remove the constructor and add below method to create the instance of fragment..
public static TrendsLV newInstance(ArrayList<String> test, int index) {
TrendsLV fragment = new TrendsLV();
testArray = test;
pageIndex = index;
return fragment;
}
Then update your ScreenSlidePagerAdapter as follow..
public class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter
{
TrendsLV[] arrayOfTrendsFragments;
public ScreenSlidePagerAdapter(FragmentManager fragmentManager)
{
super(fragmentManager);
testArray.add("One");
testArray.add("Two");
testArray.add("Three");
arrayOfTrendsFragments = new TrendsLV[NUM_PAGES];
arrayOfTrendsFragments[0] = TrendsLV.newInstance(testArray, 0);
arrayOfTrendsFragments[1] = TrendsLV.newInstance(testArray, 1)
arrayOfTrendsFragments[2] = TrendsLV.newInstance(testArray, 2)
}
#Override
public Fragment getItem(int position)
{
System.out.println("in getItem. Position = " + position);
return arrayOfTrendsFragments[position];
}
#Override
public int getCount()
{
return NUM_PAGES;
}
}
or instead of creating the array of fragments.. you can replace the in getItem() method like this..
public class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter
{
public ScreenSlidePagerAdapter(FragmentManager fragmentManager)
{
super(fragmentManager);
testArray.add("One");
testArray.add("Two");
testArray.add("Three");
}
#Override
public Fragment getItem(int position)
{
System.out.println("in getItem. Position = " + position);
Fragment instanceFragment = null;
switch (position) {
case 0:
instanceFragment =TrendsLV.newInstance(testArray, 0);;
break;
case 1:
instanceFragment =TrendsLV.newInstance(testArray, 1);;
break;
case 2:
instanceFragment =TrendsLV.newInstance(testArray, 2);;
break;
default:
break;
}
return instanceFragment;
}
#Override
public int getCount()
{
return NUM_PAGES;
}
}
I don't know what is the use of testArray so i haven't made any changes for it.
Hope it helps..!! :)

nullpointerexception on the string.isEmpty() method

ok, well I created my own custumadapter class for using in a listview, and I am getting a nullpointerexception on line 178 that says "if(inputSearch.getText().toString().isEmpty())"
can someone help me see why I am getting this?
here is my code:
package com.example.student_lists;
import java.util.ArrayList;
import java.util.Locale;
import com.resources.student_list.Student;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
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.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ListView;
import android.widget.TextView;
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}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
EditText inputSearch;
// static ListView lv;
// static EditText inputSearch;
//static MyListAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
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));
}
}
private class MyListAdapter extends ArrayAdapter<Student> implements Filterable{
private final Context context;
public ArrayList<Student> displayValues;
public ArrayList<Student> originalValues;
public MyListAdapter(Context context, int textViewResourceId, ArrayList<Student> values) {
super(context, textViewResourceId, values);
this.context = context;
this.displayValues = values;
this.originalValues = (ArrayList<Student>) values.clone();
}
public int getCount(){
return this.displayValues.size();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
//----This method sets each row of the list individually----
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.list_view, parent, false);
if(displayValues.size() > 0)
{
Student student = displayValues.get(position);
// //Fill Name
TextView name = (TextView) itemView.findViewById(R.id.contactName);
name.setText(student.getFirstName() + " " + student.getLastName());
}
return itemView;
}
public Filter getFilter() {
Filter contactFilter = new Filter() {
#Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
ArrayList<Student> filteredList = new ArrayList<Student>();
//Filter the list
if(constraint != null && originalValues !=null) {
if(!constraint.toString().isEmpty())
{
String constraintLowerCase = constraint.toString().toLowerCase();
for(Student c: originalValues)
{
String cName = c.getFirstName().toLowerCase() ;
String cLName = c.getLastName().toLowerCase();
if(cName.startsWith(constraintLowerCase) || cLName.startsWith(constraintLowerCase))
{
//Add the row to the list if filtered items
filteredList.add(c);
}
}
}
//Important steps to store the filtered list
filterResults.values = filteredList;
filterResults.count = filteredList.size();
}
return filterResults;
}
#SuppressWarnings("unchecked")
#Override
protected void publishResults(CharSequence contraint, FilterResults results) {
if (results.count > 0)
{
//Display the filtered list
MyListAdapter.this.displayValues = (ArrayList<Student>) results.values;
notifyDataSetChanged();
}
else
{
if(inputSearch.getText().toString().isEmpty())
{
//Display the original list
MyListAdapter.this.displayValues = (ArrayList<Student>) MyListAdapter.this.originalValues.clone();
}
else
{
//Display an empty list
MyListAdapter.this.displayValues.clear();
}
notifyDataSetInvalidated();
}
}
};
return contactFilter;
}
}
#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 3 total pages.
return 3;
}
#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);
}
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() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
switch(getArguments().getInt(ARG_SECTION_NUMBER)){
case 0:
case 1:
Student andres = new Student();
andres.setFirstName("Andres");
andres.setLastName("Blanco");
Student ondria = new Student();
ondria.setFirstName("Ondria");
ondria.setLastName("Arias");
ArrayList<Student> studentList = new ArrayList<Student>();
studentList.add(andres);
studentList.add(ondria);
MainActivity mainactivity = new MainActivity();
ListView lv = (ListView) rootView.findViewById(R.id.list);
final MyListAdapter adapter = mainactivity.new MyListAdapter(getActivity(), R.layout.list_view, studentList);
lv.setAdapter(adapter);
lv.setTextFilterEnabled(true);
EditText inputSearch = (EditText) rootView.findViewById(R.id.inputSearch);
inputSearch.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
adapter.getFilter().filter(cs);
}
#Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
return rootView;
case 2:
}
return rootView;
}
}
}

You need to initialise your EditText first like so:
#Override
protected void onCreate(Bundle savedInstanceState) {
EditText inputSearch = (EditText) this.findViewById(R.id.inputSearch);
}
Then, instead of:
if (inputSearch.getText().toString().isEmpty())
You should do this:
if (inputSearch.getText() != null) {
// Do something
} else {
// Do something else
}

I don't see where you've initialized inputSearch. If you don't initialize it, then it will be null and you will get a NullPointerException when you call getText() on it.
EDIT
You have this line:
EditText inputSearch = (EditText) rootView.findViewById(R.id.inputSearch);
This is only a local variable and is not the same inputSearch as the one in publishResults Change this line to
inputSearch = (EditText) rootView.findViewById(R.id.inputSearch);

Android how to put listview in view pager fragments

I have implemented a swipey tabs app using viewpager by using this template in Eclipse
Now i get an activity which extends FragmentActivity like this
package com.example.abcd2;
import java.util.Locale;
import android.os.Bundle;
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.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends FragmentActivity {
/**
* 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}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 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);
}
#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;
}
/**
* 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.
if(position==0)
{
Fragment frag2=new ShowFrag2();
return frag2;}
else
{
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 3 total pages.
return 3;
}
#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);
}
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() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy,
container, false);
TextView dummyTextView = (TextView) rootView
.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(
ARG_SECTION_NUMBER)));
return rootView;
}
}
}
In this, to create a new fragment in one of the tabs, i use if-else based on position in the getItem() method as shown.
The fragment showfrag2 is this
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class ShowFrag2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.frag2, container, false);
}
}
My question is, how do i create a listview in one of this fragments . I would like to use a simple listview only in this manner
LevelAdapter adapter = new LevelAdapter(this,
R.layout.list_item, weather_data);
listView1 = (ListView)findViewById(R.id.listView1);
listView1.setAdapter(adapter);
But this has been done in an activity. How can i use something like this in the fragment above. Also, i cannot use ListFragment as the getView() method is returning a fragment.
Please help regarding how to implement this.
Thanks
EDIT:
Here is my adapter code :
package com.example.abcd3;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class LevelAdapter extends ArrayAdapter<Level> {
static Context context;
static int layoutResourceId;
static Level data[] = null;
/* public LevelAdapter(Context context, int layoutResourceId, Level[] data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}*/
public LevelAdapter(ShowFrag1 showFrag1, int listItem,
Level[] weather_data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
// TODO Auto-generated constructor stub
}
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
WeatherHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new WeatherHolder();
holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
// holder.imgIcon2=(ImageView)row.findViewById(R.id.imgIcon2);
row.setTag(holder);
}
else
{
holder = (WeatherHolder)row.getTag();
}
Level weather = data[position];
holder.txtTitle.setText(weather.title);
holder.imgIcon.setImageResource(weather.icon);
return row;
}
static class WeatherHolder
{
ImageView imgIcon;
TextView txtTitle;
// ImageView imgIcon2;
}
}

Make sure you have ListView defined in R.layout.frag2 and set the adapter to listview in onCreateView of ShowFrag2. (Similar to the way its done in activity)
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View fragmentLayout = inflater.inflate(R.layout.frag2, container, false);
ListView listView1 = (ListView) fragmentLayout.findViewById(R.id.mylistview);
LevelAdapter adapter = new LevelAdapter(this, R.layout.list_item, weather_data);
listView1 = (ListView)findViewById(R.id.listView1);
listView1.setAdapter(adapter);
return fragmentLayout;
}

Android: tabs with swipe not showing listfragment

I'm dealing with this tutorial: http://www.lucazanini.eu/2012/android/tabs-and-swipe-views/?lang=en .
The problem is that if I set as layout of the tab a simple static layout, like this (as the tutorial does), everything works fine:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tab1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/body1" />
</LinearLayout>
But I need the tab to be a ListFragment, and the matter is that my ListFragment shows nothing at all.
Here is the code. Don't desperate: I put lots of code but I think you will probably just need to look at the classes SongsFragment and SongsListAdapter (well, I am not sure because I were it I would not write here, however I suppose it because with a static layout everything works fine!)
EDIT: I post just one listfragment in the exemple, however it seems that every listfragment has the same issue
EDIT: probably the problem is that I need to use a method to show the fragment when the tab is selected
THANKS A LOT
Activity:
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
public class PlayerActivity extends FragmentActivity implements
ActionBar.TabListener {
CollectionPagerAdapter mCollectionPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mCollectionPagerAdapter = new CollectionPagerAdapter(getSupportFragmentManager());
final ActionBar actionBar = getActionBar();
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mCollectionPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
// When swiping between different app sections, select
// the corresponding tab.
// We can also use ActionBar.Tab#select() to do this if
// we have a reference to the Tab.
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mCollectionPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab()
.setText(mCollectionPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
mViewPager.setCurrentItem(tab.getPosition());
}
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// TODO Auto-generated method stub
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
SongsFragment
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
public class SongsFragment extends ListFragment {
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
public class SongsFragment extends ListFragment {
List<String[]> songs;
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
songs = SongsDataSource.getInstance().getAllSongs();
List<String[]> values = new ArrayList<String[]>();
if (songs.size() == 0) {
values.add(new String[] { "No files found", "Try to update your database", "" });
}
for (String[] song : songs) {
values.add(new String[] { song[1], song[2], song[0] });
}
SongsListAdapter adapter = new SongsListAdapter(getActivity().getApplicationContext(),
R.layout.songs, R.id.songsFragment_titleTextView,R.id.songsFragment_artistTextView, values);
setListAdapter(adapter);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.songs, container, false);
return view;
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
}
}
SongsListAdapter
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class SongsListAdapter extends ArrayAdapter<List<String[]>> {
private final Context context;
private final List<String[]> values;
private final Integer listViewId;
private final Integer titleTextViewId;
private final Integer artistTextViewId;
public SongsListAdapter(Context context, Integer listViewId, Integer titleTextViewId,
Integer artistTextViewId, List values) {
super(context, listViewId, values);
this.context = context;
this.listViewId = listViewId;
this.values = values;
this.titleTextViewId = titleTextViewId;
this.artistTextViewId = artistTextViewId;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(listViewId, parent, false);
TextView titleView = (TextView) rowView.findViewById(titleTextViewId);
TextView artistView = (TextView) rowView.findViewById(artistTextViewId);
titleView.setText(values.get(position)[0]);
artistView.setText(values.get(position)[1]);
return rowView;
}
}
PagerAdapter
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class CollectionPagerAdapter extends FragmentPagerAdapter {
public CollectionPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = new TabFragment();
Bundle args = new Bundle();
args.putInt(TabFragment.ARG_OBJECT, i);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
return MyApplication.getInstance().infoFragments.length;
}
#Override
public CharSequence getPageTitle(int position) {
String tabLabel = null;
if(0 <= position && position < MyApplication.getInstance().infoFragments.length) {
tabLabel = MyApplication.getInstance().infoFragments[position].getLabel();
}
return tabLabel;
}
}
TabFragment class:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A fragment that launches other parts of the demo application.
*/
public class TabFragment extends Fragment {
public static final String ARG_OBJECT = "object";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Bundle args = getArguments();
int position = args.getInt(ARG_OBJECT);
int tabLayout = 0;
if(0 <= position && position < MyApplication.getInstance().infoFragments.length) {
tabLayout = MyApplication.getInstance().infoFragments[position].getLayout();
}
View rootView = inflater.inflate(tabLayout, container, false);
return rootView;
}
}
MyApplication class
import android.app.Application;
public class MyApplication extends Application {
//SIGLETON DECLARATION
private static MyApplication mInstance = null;
public static MyApplication getInstance() {
if (mInstance == null) {
mInstance = new MyApplication();
}
return mInstance;
}
public static InfoFragment[] infoFragments = new InfoFragment[] {
new InfoFragment("Songs", R.layout.songs)
};
public static class InfoFragment {
private String label;
private int layout;
public InfoFragment(String label, int layout) {
this.label = label;
this.layout = layout;
}
public String getLabel() {
return label;
}
public int getLayout() {
return layout;
}
}
}

Oh, it seems like you never actually return your SongsFragment in your getItem() method. It actually seems like you never use it!
#Override
public Fragment getItem(int i) {
Fragment fragment = new TabFragment();
Bundle args = new Bundle();
args.putInt(TabFragment.ARG_OBJECT, i);
fragment.setArguments(args);
return fragment;
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Calling Custom ListView Adapter from Fragment Class Main Activity - android

Instead of listViewAdapter = new ListView_Adapter(this);, you should instead try listViewAdapter = new ListView_Adapter(getActivity().getBaseContext()); The Issue is that you are passing a Fragment to the constructor, and not an Activity context.

Related

How to develop an UITableView with Section and ViewForHeaderInSection in Android?

ListFragment doesn't re-display data when calling it from FragmentStatePagerAdapter

nullpointerexception on the string.isEmpty() method

Android how to put listview in view pager fragments

Android: tabs with swipe not showing listfragment

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