I used the generated activity with swipe views and title strip. My code worked with two fragments per activity, however when I add three it force closes.
The error is:
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. fragment
Here is my activity class MainMenu:
//imports
public class MainMenu 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
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_menu);
// 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) {
getMenuInflater().inflate(R.menu.activity_main_menu, menu);
return true;
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to one of the primary
* sections of the app.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = new Fragment();
Bundle args = new Bundle();
if(i == 0){
fragment = new InsertCity();
}else if(i == 1){
fragment = new AddFlight();
}else if(i == 2){
fragment = new AddFlight();
}
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0: return getString(R.string.title_section1).toUpperCase();
case 1: return getString(R.string.title_section2).toUpperCase();
case 2: return getString(R.string.title_section3).toUpperCase();
}
return null;
}
}
}
Each fragment is almost identicle so I will only include one of them.
Here is my InsertCity class:
public class InsertCity extends Fragment {
private LinearLayout ll;
public InsertCity() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ll = new LinearLayout(getActivity());
ll.setOrientation(LinearLayout.VERTICAL);
TextView usernameInstruction = new TextView(getActivity());
ll.addView(usernameInstruction);
Button btn = new Button(getActivity());
btn.setText("Create Backup");
btn.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
}
});
ll.addView(btn);
// setContentView(ll);
}
// #Override
// public void onDestroyView() {
// super.onDestroyView();
// ViewGroup parentViewGroup = (ViewGroup) ll.getParent();
// if (null != parentViewGroup) {
// parentViewGroup.removeView(ll);
// }
// }
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if(ll != null) { return ll; }
return ll;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
I'm pretty sure it has to do with my SectionsPagerAdapter class or removing views, but I can't figure out how to fix it.
Help would be much appreciated.
Thanks so much!
Related
I am trying to make this theme selection with viewpager. I created a static arraylist object and using it in this activity with viewpager. But could not manage the run it properly. It is setting toolbar and status color from the position + 1 value, for the rest of them working correctly. Background,text color and name is correct but toolbar and status bar has a value of next iteration.
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String COLORSET_POS = "list_pos";
TextView nick,post,countdown;
FrameLayout frameLayout;
Toolbar toolbar;
Button select;
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(COLORSET_POS, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.colorset_preview_layout, container, false);
int pos = getArguments().getInt(COLORSET_POS);
nick = (TextView) rootView.findViewById(R.id.nick);
post = (TextView) rootView.findViewById(R.id.post);
countdown = (TextView) rootView.findViewById(R.id.countdown);
frameLayout = (FrameLayout) rootView.findViewById(R.id.frame);
toolbar = (Toolbar) getActivity().findViewById(R.id.toolbar);
select = (Button) rootView.findViewById(R.id.select);
if(HelperClass.colorSetArrayList != null)
setColors(HelperClass.colorSetArrayList.get(pos).colorSet());
Toast.makeText(getActivity(), "Position " + pos + " name " + HelperClassHelperClass.colorSetArrayList.get(pos).getName(), Toast.LENGTH_SHORT).show();
return rootView;
}
synchronized void setColors(ColorSet colorSet){
toolbar.setSubtitle(String.format(getString(R.string.online_count), new Random().nextInt(20)));
if (colorSet != null) {
nick.setTextColor(colorSet.textcolor());
post.setTextColor(colorSet.textcolor());
countdown.setTextColor(colorSet.textcolor());
frameLayout.setBackgroundColor(colorSet.backgroundcolor());
toolbar.setBackgroundColor(colorSet.primarycolor());
nick.setText(.getUsername());
select.setTextColor(colorSet.textcolor());
if(colorSet.getName()!=null) post.setText(colorSet.getName());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
getActivity().getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
getActivity().getWindow().setStatusBarColor(colorSet.primarydarkcolor());
}
}
}
}
/**
* 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 PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position);
}
#Override
public int getCount() {
return HelperClass.colorSetArrayList.size();
}
#Override
public CharSequence getPageTitle(int position) {
if(HelperClass.colorSetArrayList==null)
return "null";
else return HelperClass.colorSetArrayList.get(position).getName();
}
}
I'm pretty new to android, learning a bit and I've encountered a problem above my googling skills.
I have this:
activity_main layout with toolbar and viewPager
fragment_main with button
Main activity is this, mainly stripped to the problem:
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
private FragmentManager supportFragmentManager;
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
//TextView textView = (TextView) rootView.findViewById(R.id.section_label);
//textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
Button newFragmentBtn = (Button) rootView.findViewById(R.id.cameraBtn);
newFragmentBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// create new fragment with same layout on right so I can swipe to it
}
});
return rootView;
}
public FragmentManager getSupportFragmentManager() {
return supportFragmentManager;
}
}
/**
* 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 PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
return 3;
}
}
}
So I have 3 fragments now (might as well be any number), but I want to have this not be a fixed number, instead to increase when I click on the button that is inside a fragment, so that when I click on newFragmentBtn, it creates 4 fragments to swipe between, click again, 5 fragments etc...
Thank you for your help.
Add field fragCount to your SectionsPagerAdapter (should extend FragmentStatePagerAdapter), add a setter to change the number of fragments you need, and don't forgot to call notifyDataSetChanged() after you changed the counter:
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
private int fragCount = 3;//initial number
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return PlaceholderFragment.newInstance(position);
}
public void setCount(int fragCount){
this.fragCount = fragCount;
notifyDataSetChanged();
}
#Override
public int getCount() {
return fragCount;
}
}
I have a tabbed activity with 1 fragment, this fragment has a button, i want when i click the button it create a new fragment and i can swipe between the two fragments
this is the main activity
public class ActivityBeamRec extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
public static CustomViewPager mViewPager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity_beam_rec);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (CustomViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setPagingEnabled(false);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position){
case 0 : return PlaceholderFragment.newInstance(position + 1);
// case 1 : return the new fragment ;
}
return null;
}
#Override
public int getCount() {
return 1 ;
}
}
}
this is the fragment i have.
public class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_activity_beam_rec, container, false);
final EditText etxb;
etxb = (EditText)rootView.findViewById(R.id.editText);
final Button buDesign = (Button)rootView.findViewById(R.id.buDesign);
buDesign.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
double b;
b = Double.valueOf(etxb.getText().toString());
\\here i want the button to create the second fragment and pass the variable d to it
ActivityBeamRec.mViewPager.setPagingEnabled(true); // this is to enable the siwpe between the fragments
ActivityBeamRec.mViewPager.setCurrentItem(2); // ths is to set the new fragment as the current view
}
});
return rootView;
}
}
the second fragment should go through on create view stage after the button is pressed, and please tell where i put each code if there is a way to do this.
ActivityBeamRec:
public class ActivityBeamRec extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
private TabLayout tabLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
// This list holds the fragments for the pages displayed by view pager.
private List < Fragment > fragments = new ArrayList < Fragment > ();
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
// Add the first fragment:
fragments.add(PlaceholderFragment.newInstance(1));
}
private void addFragment(Fragment fragment) {
fragments.add(fragment);
// Notify view pager that the contents of the adapter has changed and that it needs to update
// its pages:
notifyDataSetChanged();
// Since content of view pager has changed, re-wire tab layout:
tabLayout.setupWithViewPager(mViewPager);
// Set the current page in the view pager to the last added fragment:
mViewPager.setCurrentItem(fragments.size() - 1);
}
#Override
public Fragment getItem(int position) {
return fragments.get(position);
}
#Override
public int getCount() {
return fragments.size();
}
#Override
public CharSequence getPageTitle(int position) {
// Set the tab title as the number of the current section:
return "SECTION " + (position + 1);
}
}
/**
* Adds a new fragment (page) to the view pager.
* This method can either be public or package-private (without any modifier) depending on the package
* of 'PlaceholderFragment'. Since you're new to Java please refer the link to access modifiers below.
*
* #param fragment the fragment to be added to the view pager
**/
public void addFragment(Fragment fragment) {
mSectionsPagerAdapter.addFragment(fragment);
}
/**
* Returns the number of the next section (page) to be added.
*
* #return the next section number
*/
public int getNextSectionNumber() {
return mSectionsPagerAdapter.getCount() + 1;
}
}
PlaceholderFragment:
public class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_activity_beam_rec, container, false);
final EditText etxb;
etxb = (EditText) rootView.findViewById(R.id.editText);
final Button buDesign = (Button) rootView.findViewById(R.id.buDesign);
buDesign.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
double b;
b = Double.valueOf(etxb.getText().toString());
//here i want the button to create the second fragment and pass the variable d to it
int nextSectionNumber = ((ActivityBeamRec) getActivity()).getNextSectionNumber();
((ActivityBeamRec) getActivity()).addFragment(PlaceholderFragment.newInstance(nextSectionNumber));
}
});
return rootView;
}
}
When the button in the fragment is clicked the following things occur in sequence:
addFragment() method of parent activity is called by passing the fragment instance to be added. This public method is used to access the private member mSectionsPagerAdapter of parent activity. We can do away with this method if mSectionsPagerAdapter is made public or package-private.
SectionsPagerAdapter adds the passed-in fragment to its list of fragments and then notifies the view pager that its data set has changed.
TabLayout is refreshed to accommodate the new fragment (page).
Finally the view pager is made to scroll to the added fragment using the setCurrentItem() method.
Reference:
Java Access Control Modifiers
List Data Structure in Java
In your SectionsPagerAdapter
private ArrayList<Fragment> fragments = new ArrayList<>();
#Override
public int getCount() {
return fragments.size();
}
#Override
public Fragment getItem(int position) {
if(position<fragments.size())
return fragments.get(position);
throw new NullPointerException("No Fragment with this position found.");
}
public void addFragment(Fragment newFragment){
fragments.add(newFragment);
}
In the MainActivity before setting the adapter with mViewPager.setAdapter(mSectionsPagerAdapter); add your first fragment(the PlaceHolder in your case). (or do it in the SectionPagerAdapter's constructor).
And then in your OnClickListener call the SectionPagerAdapter's addFragment method.
EDIT: In MainActivity:
mSectionsPagerAdapter.addFragment(PlaceholderFragment.newInstance(0));
mSectionsPagerAdapter.setAdapter(mSectionsPagerAdapter);
I have a main activity with a View Pager and a Spinner. When I change the spinner, i want the fragments in the ViewPager to update to use new data.
I have tried to communicate from the Activity to the Fragment when a selection has been made in the Spinner but I keep getting a NullPointerException.
i call the updateListView() method from the Activity whenever the Spinner selection has been confirmed. The commented line of code also causes it to crash.
ListFragment lf = (ListFragment) mSectionsPagerAdapter.getItem(0);
lf.updateListView();
Here is my code
public class ListFragment extends Fragment {
ArrayList<Psalm> psalms;
ListViewAdapter adapter;
View v;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState){
v = inflater.inflate(R.layout.fragment_list, parent, false);
psalms = GlobalSingleton.get(getActivity()).getPsalms().getPsalms();
adapter = new ListViewAdapter(getActivity(), psalms);
ListView l = (ListView) v.findViewById(R.id.fragmentListListView);
l.setAdapter(adapter);
return v;
}
public void updateListView(){
psalms = GlobalSingleton.get(getActivity()).getPsalms().getPsalms();
System.out.println("HERE");
((ListViewAdapter) ((ListView) v.findViewById(R.id.fragmentListListView)).getAdapter()).notifyDataSetChanged();
//adapter.notifyDataSetChanged();
}
}
main activity
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;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
String[] files = getAssets().list("");
ArrayList<Psalm> singPsalms = new ArrayList<Psalm>();
ArrayList<Psalm> scottishPsalter = new ArrayList<Psalm>();
for(String s: files){
if(s.split("_")[0].equals("SingPsalms")){
singPsalms.add(new Psalm(s.split("_")[1], s.split("_")[2], s.split("_")[3].replace(".txt", "")));
} else if(s.split("_")[0].equals("ScottishPsalter")){
scottishPsalter.add(new Psalm(s.split("_")[1] , s.split("_")[2], s.split("_")[3].replace(".txt", "")));
}
}
Collections.sort(singPsalms, new PsalmComparator());
GlobalSingleton.get(this).setSingPsalms(new Psalmody("Sing Psalms", singPsalms));
GlobalSingleton.get(this).setScottishPsalter(new Psalmody("Scottish Psalter", scottishPsalter));
GlobalSingleton.get(this).setSelectedPsalmody("Scottish Psalter");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Adapter
Spinner psalter = (Spinner) findViewById(R.id.spinner1);
SpinnerAdapter adapter = ArrayAdapter.createFromResource(this, R.array.psalter, android.R.layout.simple_spinner_dropdown_item);
psalter.setAdapter(adapter);
psalter.setOnItemSelectedListener( new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selected = parent.getItemAtPosition(position).toString();
if (!selected.equals(GlobalSingleton.get(getApplicationContext()).getSelectedPsalmody())){
GlobalSingleton.get(getApplicationContext()).setSelectedPsalmody(selected);
System.out.println("HERE");
ListFragment lf = (ListFragment) mSectionsPagerAdapter.getItem(0);
lf.updateListView();
}
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
// 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 = null;
if (position == 0){
fragment = new ListFragment();
} else {
fragment = new GridFragment();
}
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 "List".toUpperCase(l);
case 1:
return "Grid".toUpperCase(l);
case 2:
return "Metre Seperated".toUpperCase(l);
}
return null;
}
}
}
Use same object of ListView on which you are calling setAdapter in onCreateView for calling notifyDataSetChanged as:
....
l = (ListView) v.findViewById(R.id.fragmentListListView);
l.setAdapter(adapter);
return v;
}
ListView l;
public void updateListView(){
//....
l.getAdapter()).notifyDataSetChanged();
//adapter.notifyDataSetChanged();
}
try below code. do not use view and use member listview.
public class ListFragment extends Fragment {
ArrayList<Psalm> psalms;
ListViewAdapter adapter;
ListView l;
View v;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState){
v = inflater.inflate(R.layout.fragment_list, parent, false);
psalms = GlobalSingleton.get(getActivity()).getPsalms().getPsalms();
adapter = new ListViewAdapter(getActivity(), psalms);
l = (ListView) v.findViewById(R.id.fragmentListListView);
l.setAdapter(adapter);
return v;
}
public void updateListView(){
psalms = GlobalSingleton.get(getActivity()).getPsalms().getPsalms();
System.out.println("HERE");
if(l != null){
l.getAdapter()).notifyDataSetChanged();
}
}
This is my page:
package[...]
import [...]
public class Home extends FragmentActivity {
ViewPager mViewPager;
ListView list;
row_video_Adapter adapter;
public Home CustomListView = null;
public ArrayList<ModelloLista> CustomListViewValuesArr = new ArrayList<ModelloLista>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
// 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);
// ListView
CustomListView = this;
/******** Take some data in Arraylist ( CustomListViewValuesArr ) ***********/
setListData();
Resources res =getResources();
list= (ListView)findViewById(R.id.section_label); // List defined in XML ( See Below )
/**************** Create Custom Adapter *********/
adapter=new row_video_Adapter(CustomListView, CustomListViewValuesArr,res);
list.setAdapter(adapter);
}
/****** Function to set data in ArrayList *************/
public void setListData(){
final ModelloLista sched = new ModelloLista();
sched.setTitolo("Video 1");
sched.setImmagine("video_preview");
sched.setUrl("http:\\www.com");
CustomListViewValuesArr.add(sched);
}
/***************** This function used by adapter ****************/
public void onItemClick(int mPosition){
ModelloLista tempValues = ( ModelloLista ) CustomListViewValuesArr.get(mPosition);
// SHOW ALERT
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.home, menu);
return true;
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
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 null;
}
}
public static class DummySectionFragment extends 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_home_dummy,
container, false);
//TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
switch(getArguments().getInt(ARG_SECTION_NUMBER)){
case 1:
//dummyTextView.setText("text 1");
break;
case 2:
[...]
}
return rootView;
}
}
}
How can I put my Custom ListView in a fragment?
I tried to move the code in the switch(getArguments().getInt(ARG_SECTION_NUMBER)){ but there were many errors.
What should I do?