This is very simplified problem that I have regarding to Fragments and calling methods between fragments. I have put in the code place where I think calling method should be. Correct me if I'm wrong or if you have right solution for my problem. MainFragment extends Fragment because it is not activity... I have navigation drawer so that is how it suppose to be... :)
public class MainFragment extends Fragment{
public MainFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_pager, container, false);
adapter = new CategoriesPagerAdapter(getChildFragmentManager(),Titles,Numboftabs);
pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setAdapter(adapter);
tabs = (SlidingTabLayout) rootView.findViewById(R.id.tabs);
tabs.setDistributeEvenly(true);
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
tabs.setViewPager(pager);
Toolbar mToolbar = (Toolbar) getActivity().findViewById(R.id.toolbar_actionbar);
final Spinner spinner_nav = (Spinner) mToolbar.findViewById(R.id.spinner_nav);
spinner_nav.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// ...here I need to call method "writeText()" in both fragments to update both TextViews also in both fragments (tabs)
}
});
}
public class CategoriesPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[];
int NumbOfTabs;
public CategoriesPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
#Override
public Fragment getItem(int position) {
if (position == 0) {
Tab1Class tab1 = new Tab1Class();
return tab1;
} else if (position == 1) {
Tab2Class tab2 = new Tab2Class();
return tab2;
} else {
return null;
}
}
#Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
#Override
public int getCount() {
return NumbOfTabs;
}
}
Tab2Class:
public class Tab1Class extends Fragment {
TextView tv1;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_tab1, container, false);
tv1 = (TextView) rootView.findViewById(R.id.tv1);
writeText();
}
public void writeText(){
tv1.setText("TV1 text");
}
}
Tab1Class:
public class Tab2Class extends Fragment {
TextView tv2;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_tab2, container, false);
tv2 = (TextView) rootView.findViewById(R.id.tv2);
writeText();
}
public void writeText(){
tv2.setText("TV2 text");
}
}
.
.
.
Toolbar mToolbar = (Toolbar) getActivity().findViewById(R.id.toolbar_actionbar);
final Spinner spinner_nav = (Spinner) mToolbar.findViewById(R.id.spinner_nav);
spinner_nav.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
/////////////////////////Added////////////
adapter.callWrite();
////////////////////////////////////////
}
});
}
public class CategoriesPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[];
int NumbOfTabs;
/////////////////////Added///////////////////
Tab1Class tab1;
Tab2Class tab2;
//////////////////////////////
public CategoriesPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
#Override
public Fragment getItem(int position) {
if (position == 0) {
tab1 = new Tab1Class();
return tab1;
} else if (position == 1) {
tab2 = new Tab2Class();
return tab2;
} else {
return null;
}
}
////////////////////////////Added////////////////////
public void callWrite(){
if(tab1 != null)
tab1.writeText();
if(tab2 != null)
tab2.writeText();
}
/////////////
.
.
.
Here's an alternative:
public class BlankFragment extends Fragment {
public static final String ACTION_SOME_STUFF_HAPPENED = "stuff_happened_yo";
public static final String EXTRA_STUFF = "this_is_stuff";
public static void notifyStuffHappening(Context context, String stuff){
Intent intent = new Intent(ACTION_SOME_STUFF_HAPPENED);
intent.putExtra(EXTRA_STUFF, stuff);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
private StuffHappenedReceiver mStuffListener;
public static class StuffHappenedReceiver extends BroadcastReceiver {
final BlankFragment mFragment;
public StuffHappenedReceiver(BlankFragment fragment) {
this.mFragment = fragment;
// listen for changes to the account we're using
IntentFilter filter = new IntentFilter(ACTION_SOME_STUFF_HAPPENED);
LocalBroadcastManager.getInstance(fragment.getContext()).registerReceiver(this, filter);
}
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_SOME_STUFF_HAPPENED.equals(action)) {
mFragment.someStuffHappened(intent.getStringExtra(EXTRA_STUFF));
}
}
}
private void someStuffHappened(String stringExtra) {
}
public BlankFragment() {
// Required empty public constructor
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
mStuffListener = new StuffHappenedReceiver(this);
}
#Override
public void onDetach() {
LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(mStuffListener);
mStuffListener = null;
super.onDetach();
}
}
This shows the basics of a fragment that will register a broadcast receiver automatically as it attaches / detaches from the activity.
If the fragment is not attached, it won't be updated.
To update this fragment, call the static method "notifyStuffHappening"
Related
I am new to Android. Please excuse me if it's a silly question:
If i click on button of a Fragment - it has to trigger a test and show the result in other Fragment. So to make things simple, have written a code on button click as follows. It's not working. Please suggest.
My actual intent is to register a log.add BroadcastReceiver, so that anywhere any log error or debug is called, that message has to appear in the TestStatusFragment.
public class TriggerTestFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_trigger, container, false);
Button stopScheduler = (Button) view.findViewById(R.id.testButton);
stopScheduler.setOnClickListener((View sview) -> {
View teststatusView = inflater.inflate(R.layout.fragment_teststatus, container, false);
TextView textView = (TextView) teststatusView.findViewById(R.id.text_view);
textView.setText("test result....");
});
return view;
}
}
MainActivity.java
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new TriggerTestFragment(), "TRIGGERTEST");
adapter.addFragment(new TestStatusFragment(), "TEST STATUS");
viewPager.setAdapter(adapter);
}
Second Fragment:
public class TestStatusFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Context context = getContext();
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_teststatus, container, false);
return view;
}
}
Use interface to communicate between them.
Fragment One
public class FragOne extends Fragment {
EditText etxtName, etxtDesc;
Button btnSubmit;
String name, desc;
private OnFragmentInteractionListener mListener;
public FragOne() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_frag_one, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
etxtName = (EditText) view.findViewById(R.id.etxtName);
etxtDesc = (EditText) view.findViewById(R.id.etxtDesc);
btnSubmit = (Button) view.findViewById(R.id.btnSubmit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
name = etxtName.getText().toString().trim();
desc = etxtDesc.getText().toString().trim();
if(name == null || desc == null) {
Toast.makeText(getActivity(), "Both fields required", Toast.LENGTH_SHORT).show();
} else {
mListener.onFragmentInteraction(name, desc);
etxtName.setText("");
etxtDesc.setText("");
}
}
});
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(String name, String desc);
}
}
Fragment Two
public class FragTwo extends Fragment implements FragOne.OnFragmentInteractionListener{
TextView textView, textDesc;
public FragTwo() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_frag_two, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
textView = (TextView) view.findViewById(R.id.txtName);
textDesc = (TextView) view.findViewById(R.id.txtDesc);
}
#Override
public void onFragmentInteraction(String name, String desc) {
textView.setText(name);
textDesc.setText(desc);
}
}
Init fragments
fragOne = new FragOne();
fragTwo = new FragTwo();
PagerAdapter
public static class MyPagerAdapter extends FragmentPagerAdapter implements FragOne.OnFragmentInteractionListener{
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return fragOne;
case 1:
return fragTwo;
default:
return null;
}
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
return "Page " + position;
}
#Override
public void onFragmentInteraction(String name, String desc) {
fragTwo.onFragmentInteraction(name, desc);
}
}
MainActivity need implement onFragmentInteraction interface
public class MainActivity extends AppCompatActivity implements FragOne.OnFragmentInteractionListener{
static FragOne fragOne;
static FragTwo fragTwo;
MyPagerAdapter myPagerAdapter;
ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragOne = new FragOne();
fragTwo = new FragTwo();
viewPager = (ViewPager) findViewById(R.id.viewPager);
myPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(myPagerAdapter);
}
#Override
public void onFragmentInteraction(String name, String desc) {
myPagerAdapter.onFragmentInteraction(name, desc );
}
public static class MyPagerAdapter extends FragmentPagerAdapter implements FragOne.OnFragmentInteractionListener{
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return fragOne;
case 1:
return fragTwo;
default:
return null;
}
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
return "Page " + position;
}
#Override
public void onFragmentInteraction(String name, String desc) {
fragTwo.onFragmentInteraction(name, desc);
}
}
}
You can read full article here https://www.mytrendin.com/passing-data-between-fragments/
Hi I am using Tablayout in my
TAB1 TAB2 TAB3
When I open the app, by default TAB1 is selected. All the TABs have recyclerview. Now I have one FAB button for all the fragments. I am using FAB button for changing language.
Whenever user change language data will display as per language selection. Now issue is When I am on TAB3 and changing language instead of staying on TAB3 it goes to TAB1.
Can any one help me to solve this issue.
public class LibraryFragment extends Fragment {
private static final String TAG = LibraryFragment.class.getSimpleName();
private TabLayout tabLayout;
private ViewPager viewPager;
private String catid;
private FragmentManager fragmentManager;
private String SELECTED_ACTION;
private String SELECTED_LANGUAGE,SELECTED_LANGUAGENM,sel_cat;
private int VID_CODE;
private FloatingActionButton fab;
private ArrayList<LanguageModel> langList;
public LibraryFragment() {
}
#RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_library, container, false);
langList = (ArrayList<LanguageModel>) getArguments().getSerializable("langlist");
catid = getArguments().getString("frommusic");
SELECTED_ACTION = getArguments().getString("action");
SELECTED_LANGUAGE = getArguments().getString("sel_lang");
SELECTED_LANGUAGENM = getArguments().getString("sel_langnm");
sel_cat = getArguments().getString("sel_cat");
System.out.println("in library" + SELECTED_LANGUAGE);
tabLayout = (TabLayout) view.findViewById(R.id.tabs);
viewPager = (ViewPager) view.findViewById(R.id.view_pager);
viewPager.setAdapter(new CustomFragmentPageAdapter(getChildFragmentManager()));
tabLayout.setupWithViewPager(viewPager);
fab = (FloatingActionButton) view.findViewById(R.id.fabChat);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setdailog();
}
});
return view;
}
public void setdailog()
{
final Dialog cpDialog = new Dialog(getActivity());
cpDialog.setTitle("Select Language");
cpDialog.setContentView(R.layout.alert_list);
ListView listView = (ListView) cpDialog.findViewById(R.id.listiview_lang);
AlertListAdapter mAdapter = new AlertListAdapter(langList, getActivity());
listView.setAdapter(mAdapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
SELECTED_LANGUAGE = langList.get(position).getLangid();
System.out.println("JO JO"+SELECTED_LANGUAGE);
Intent intent=new Intent(getActivity(),MusicActivity.class);
intent.putExtra("langlist",langList);
intent.putExtra("selid",catid);
intent.putExtra("langid",SELECTED_LANGUAGE);
intent.putExtra("langname",langList.get(position).getLangname());
intent.putExtra("selcat",sel_cat);
startActivity(intent);
cpDialog.dismiss();
}
});
cpDialog.show();
}
public class AlertListAdapter extends BaseAdapter {
ArrayList<LanguageModel> mData;
Context mContext;
LayoutInflater inflater;
public AlertListAdapter(ArrayList<LanguageModel> data, Context context) {
mData = data;
mContext = context;
inflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return mData.size();
}
#Override
public Object getItem(int arg0) {
return null;
}
#Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater) mContext
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.item_alert_list, null);
}
TextView tvTitle = (TextView) convertView.findViewById(R.id.textView_languge);
tvTitle.setText(mData.get(position).getLangname());
return convertView;
}
}
public class CustomFragmentPageAdapter extends FragmentPagerAdapter {
private final String TAG = CustomFragmentPageAdapter.class.getSimpleName();
private static final int FRAGMENT_COUNT = 3;
public CustomFragmentPageAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position){
case 0:
Fragment f1 = new SongFragment();
Bundle args1 = new Bundle();
args1.putString("fromlibfrag", catid);
args1.putString("action", SELECTED_ACTION);
args1.putString("sel_lang", SELECTED_LANGUAGE);
args1.putSerializable("langlist",langList);
f1.setArguments(args1);
return f1;
case 1:
Fragment f2 = new PhotoFragment();
Bundle args2 = new Bundle();
args2.putString("fromlibfrag", catid);
args2.putString("action", SELECTED_ACTION);
args2.putString("sel_lang", SELECTED_LANGUAGE);
args2.putSerializable("langlist",langList);
f2.setArguments(args2);
return f2;
case 2:
Fragment f3 = new SmsFragment();
Bundle args3 = new Bundle();
args3.putString("fromlibfrag", catid);
args3.putString("action", SELECTED_ACTION);
args3.putString("sel_lang", SELECTED_LANGUAGE);
args3.putSerializable("langlist",langList);
f3.setArguments(args3);
return f3;
}
return null;
}
#Override
public int getCount() {
return FRAGMENT_COUNT;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position){
case 0:
return "Videos";
case 1:
return "Photos";
case 2:
return "SMS";
}
return null;
}
}
}
int position=0;
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
#Override public void onTabSelected(TabLayout.Tab tab){
position = tab.getPosition();
} });
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setdailog(position);
}
});
Now
public void setdailog(int currentTab)
{
final Dialog cpDialog = new Dialog(getActivity());
cpDialog.setTitle("Select Language");
cpDialog.setContentView(R.layout.alert_list);
ListView listView = (ListView) cpDialog.findViewById(R.id.listiview_lang);
AlertListAdapter mAdapter = new AlertListAdapter(langList, getActivity());
listView.setAdapter(mAdapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
SELECTED_LANGUAGE = langList.get(position).getLangid();
System.out.println("JO JO"+SELECTED_LANGUAGE);
Intent intent=new Intent(getActivity(),MusicActivity.class);
intent.putExtra("langlist",langList);
intent.putExtra("selid",catid);
intent.putExtra("langid",SELECTED_LANGUAGE);
intent.putExtra("langname",langList.get(position).getLangname());
intent.putExtra("selcat",sel_cat);
intent.putExtra("currentTab" , currentTab);
startActivity(intent);
finish();
cpDialog.dismiss();
}
});
cpDialog.show();
}
Now In MusicActivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
int currentTab = intent.getIntExtra("currenttab", 0);
//here you can check if you get 1, 2 or 3 in currentTab then you have to set current tab to 1, 2 or 3 respectively.
}
in my App i have Gridview and TabActivity.
my Rice.class has gridview,
in MainActivity.class has tabActivity ,
myChild Tabs are FragmentA,FragmentB,FragmnetC.
i want pass my gridview index to FragmnetA.how can i slove this problem.
Rice.class
public class Rice extends ActionBarActivity {
FragmentA fa;
GridView gridView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rice);
gridView=(GridView) findViewById(R.id.gridViewR);
gridView.setAdapter(new MyRAdapter(this));
Intent intent = getIntent();
//Breakfast bf = (Breakfast) getFragmentManager().findFragmentById(R.id.fragment2);
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent intent = new Intent(getApplicationContext(),MainActivity.class);
intent.putExtra("index",i);
startActivity(intent);
}
});
}
}
class MyRAdapter extends BaseAdapter {
private Context mContext;
public MyRAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
//imageView.setLayoutParams(new GridView.LayoutParams(450, 200));
//imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
//imageView.setPadding(5, 5, 5, 5);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
private Integer[] mThumbIds = {
R.drawable.back_1, R.drawable.back_2,
R.drawable.back_3, R.drawable.back_4,
R.drawable.back_5, R.drawable.back_6,
R.drawable.back_11,
};
}
MainActivity.class
public class MainActivity extends FragmentActivity {
ViewPager viewPager=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
FragmentManager fragmentManager = getSupportFragmentManager();
viewPager.setAdapter(new MyFrAdapter(fragmentManager));
Intent intent = getIntent();
int index = intent.getIntExtra("index",0);
}
}
class MyFrAdapter extends FragmentPagerAdapter{
public MyFrAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = null;
if(i==0){
fragment = new FragmentA();
}
if(i==1){
fragment = new FragmentB();
}
if(i==2){
fragment = new FragmentC();
}
return fragment;
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
if(position == 0){
return "Ingredient";
}
if(position == 1){
return "Recipe";
}
if(position == 2){
return "Summary";
}
return null;
}
}
FragmentA.class
public class FragmentA extends Fragment {
TextView textView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_a,container,false);
textView = (TextView) view.findViewById(R.id.textView);
return view;
}
}
public class MainActivity extends FragmentActivity {
int mIndex;
ViewPager viewPager=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
FragmentManager fragmentManager = getSupportFragmentManager();
viewPager.setAdapter(new MyFrAdapter(fragmentManager));
Intent intent = getIntent();
mIndex = intent.getIntExtra("index",0);
}
class MyFrAdapter extends FragmentPagerAdapter{
public MyFrAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = null;
if(i==0){
fragment = new FragmentA().newInstance(mIndex);
}
if(i==1){
fragment = new FragmentB();
}
if(i==2){
fragment = new FragmentC();
}
return fragment;
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
if(position == 0){
return "Ingredient";
}
if(position == 1){
return "Recipe";
}
if(position == 2){
return "Summary";
}
return null;
}
}
}
//...
public class FragmentA extends Fragment {
TextView textView;
int FragmentA_index;
public static final String EXTRA_INDEX = "mypackage.index";
public static FragmentA newInstance(int index) {
Bundle args = new Bundle();
args.putInt(EXTRA_INDEX, index);
FragmentA fragment = new FragmentA();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FragmentA_index = getArguments().getInt(EXTRA_INDEX);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_a,container,false);
textView = (TextView) view.findViewById(R.id.textView);
return view;
}
}
I have a FragmentActivity that uses a ViewPager to flip left and right through pages of data (two ListFragments).
public class StopsActivity extends FragmentActivity {
private ViewPager mViewPager;
private PagerTabStrip mPagerTabStrip;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_stops);
mPagerTabStrip =(PagerTabStrip)findViewById(R.id.pager_header);
mViewPager = (ViewPager)findViewById(R.id.pager);
mPagerTabStrip.setDrawFullUnderline(true);
mPagerTabStrip.setTabIndicatorColorResource(R.color.pagerTabStrip);
mViewPager.setAdapter(new StopsAdapter(getSupportFragmentManager()));
mViewPager.setCurrentItem(0);
}
private class StopsAdapter extends FragmentPagerAdapter {
public StopsAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return StopsFragment.newInstance(routename, Stop.FORWARD);
case 1:
return StopsFragment.newInstance(routename, Stop.BACKWARD);
}
return null;
}
#Override
public int getCount() { return 2;}
#Override
public CharSequence getPageTitle(int position) { /* implementation ... */}
}
}
Everything runs ok, but I think that the instantation of the second StopFragment invalidate the data of the first one when getItem is called.
public class StopsFragment extends ListFragment {
private StopsAdapter mStopsAdapter;
private ListView mListView;
private String routename;
private int direction;
public static StopsFragment newInstance(String routename, int direction) {
StopsFragment stopsFragment = new StopsFragment();
// Supply arguments
Bundle args = new Bundle();
args.putString("routename", routename);
args.putInt("direction", direction);
stopsFragment.setArguments(args);
return stopsFragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Setup the adapter
ArrayList<Stop> stops = ...
mStopsAdapter = new StopsAdapter(getActivity(), stops);
setRetainInstance(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle inState) {
View rootView = inflater.inflate(R.layout.fragment_stops, container, false);
// Attach the adapter
mListView = (ListView) rootView.findViewById(android.R.id.list);
mListView.setAdapter(mStopsAdapter);
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
The page "IDA" corresponds to StopFragment with argument Stop.FORWARD and the page "VUELTA" corresponds the StopFragment with argument Stop.BACKWARD. As you can see in the images below, just one of them (the last one instantiate) is populated:
What I'm doing wrong?
EDIT
This is StopsAdapter
class StopsAdapter extends BaseAdapter {
private ArrayList<Stop> stops;
private LayoutInflater inflater;
public StopsAdapter(Context context, ArrayList<Stop> stops) {
this.stops = stops;
this.inflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return stops.size();
}
#Override
public Object getItem(int position) {
return stops.get(position);
}
#Override
public long getItemId(int position) {
return (long)position;
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_stop, parent, false);
}
TextView name = (TextView)convertView.findViewById(R.id.tvStopName);
TextView description = (TextView)convertView.findViewById(R.id.tvStopDescription);
Stop stop = (Stop)getItem(position);
name.setText(stop.name);
if (stop.info != null) {
description.setText(stop.info);
}
return convertView;
}
}
Ok, my fault. The code that was giving me problems is the only that I haven't posted (ArrayList<Stop> stops = ...). The code about Fragments and ViewPager works correctly.
Need help to fix a code I saw in a https://stackoverflow.com/a/9275732/1938357. The solution I need is get the current view onany page in my viewpager based application
Below is the code for reference
public View getCurrentView(ViewPager pager) {
for (int i = 0; i < pager.getChildCount(); i++) {
View child = pager.getChildAt(i);
if (child.getX() <= pager.getScrollX() + pager.getWidth()
&& child.getX() + child.getWidth() >= pager.getScrollX() + pager.getWidth()) {
return child;
}
}
return getChildAt(0);
I am trying to access the current view in the view pager and used the code above. It works fine when I scroll forwards. But when I scroll backwards then after 2 backward scrolls this stops working.
Public class myActivity extends FragmentActivity
//Variable declarations
protected void onCreate(Bundle savedInstanceState) {
ViewPager mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
View CurrView;
OnPageChangeListener pageChangelistener = new OnPageChangeListener() {
#Override
public void onPageSelected(int pageSelected) {
doTextViewChnges();//access the text view and update it based on pageSelected
---THIS IS WHERE I AM STUCK IN TRYING TO GET THE TEXTVIEW IN MY CURRENT FRAGMWNT/VIEW-------
}
mPager.setOnPageChangeListener(pageChangelistener);
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
super(fm);
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
return ScreenSlidePageFragment.create(position, <other parameters I want to pass>);
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
And below is my ScreenSlidePageFragment class
public class ScreenSlidePageFragment extends android.support.v4.app.Fragment {
public static final String ARG_PAGE = "pagenumber";
public static final String ARG_PAGEARRAY = "pages";
private int mPageNumber;
//Declare other variables
#SuppressLint("NewApi")
public static ScreenSlidePageFragment create(int pageNumber, String[] pages, int bookmarkPageNumber, String storyName, int linesInOnePage) {
ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
args.putStringArray(ARG_PAGEARRAY, pages);
fragment.setArguments(args);
return fragment;
}
#SuppressLint("NewApi")
public ScreenSlidePageFragment() {
}
#SuppressLint("NewApi")
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
pages = getArguments().getStringArray(ARG_PAGEARRAY);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = (ViewGroup) inflater
.inflate(R.layout.activity_story, container, false);
//load layout with all components filled up for that page
loadView(rootView);
return rootView;
}
public int getPageNumber() {
return mPageNumber;
}
It is very hard to discuss in comments with example of code.
As I see in grepcode FragmentStatePagerAdapter.setPrimaryItem(), receive object as android.support.v4.app.Fragment. But you are receive ClassCastException when trying to cast object as Fragment. Can you check your casting: do you really cast object in android.support.v4.app.Fragment not in android.app.Fragment? If all right, add your exception message to your question, please.
UPDATE:
If your ScreenSlidePagerAdapter has method getCurrentView(), then your method 'getCurrentView()' can work like this:
public View getCurrentView(ViewPager pager) {
return ((ScreenSlidePagerAdapter) pager.getAdapter()).getCurrentView();
}
And method getCurrentView() of your ScreenSlidePagerAdapter:
public View getCurrentView() {
return currView;
}
UPDATE 2:
I've made some modification with your code:
Your Activity with private Adapter:
public class myActivity extends FragmentActivity implements ISelectItemListener {
// Your variable declarations and methods
#Override
protected void onCreate(Bundle savedInstanceState) {
final ViewPager pager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
pager.setAdapter(mPagerAdapter);
pager.setOnPageChangeListener(
new OnPageChangeListener() {
#Override
public void onPageSelected(int pageSelected) {
final ScreenSlidePageFragment fragment = mPagerAdapter.getFragment(pageSelected);
if (fragment != null) {
fragment.doTextViewChnges();
}
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
});
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
//Your variable declarations
private final ScreenSlidePageFragment[] mFragments;
public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
super(fm);
mFragments = new ScreenSlidePageFragment[NUM_PAGES];
}
#Override
public int getCount() {
return NUM_PAGES;
}
// It will create new ScreenSlidePageFragment by position if it's not exsist
#Override
public android.support.v4.app.Fragment getItem(int position) {
if (getFragment(position) == null) {
mFragments[position] = ScreenSlidePageFragment.create(position, <other parameters I want to pass>);
}
return getFragment(position);
}
// It will give you ScreenSlidePageFragment if it's exists, or null
public ScreenSlidePageFragment getFragment(int position) {
return mFragments[position];
}
}
}
Your Fragment:
public class ScreenSlidePageFragment extends Fragment {
//Your variables and methods
public static ScreenSlidePageFragment create(int pageNumber, String[] pages, int bookmarkPageNumber, String storyName, int linesInOnePage) {
final Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
args.putStringArray(ARG_PAGEARRAY, pages);
final ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
pages = getArguments().getStringArray(ARG_PAGEARRAY);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = (ViewGroup) inflater.inflate(R.layout.activity_story, container, false);
loadView(rootView);
return rootView;
}
public int getPageNumber() {
return mPageNumber;
}
// Let's keep logic of modifications in fragment
public void doTextViewChnges() {
final View view = getView();
// do what you want with your View and his children
}
}