i am developing an android app which have a tab activity.in this activity there are four more tabs which is created by using Fragments.now i want to get the data from the fragment tabs in the main tab activity.i searched a lot but not find the exact answer.if any could solve this. below is my code
Main Tab Activity
public class TabedActivity extends ActionBarActivity {
// Declaring Your View and Variables
MobileServiceClient MSC;
MobileServiceTable MST;
Toolbar toolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Basic","Education","Profession","Experiance"};
int Numboftabs =4;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tabed);
// Creating The Toolbar and setting it as the Toolbar for the activity
// toolbar = (Toolbar) findViewById(R.id.tool_bar);
//setSupportActionBar(toolbar);
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
}
#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_tabed, 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.
item.getItemId();
switch (item.getItemId()) {
case R.id.action_settings:
goToHome();
return true;
case R.id.done:
Toast.makeText(this, "you select done", Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
//noinspection SimplifiableIfStatement
}
public void goToHome(){
Intent gotohome=new Intent(this,MapsActivity.class);
startActivity(gotohome);
}
//the following function was added to update but not working
public static void settingValues(){
and the Tab activity
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.Toast;
/**
* Created by hp1 on 21-01-2015.
*/
public class Tab1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
EditText contactNumber= (EditText)v.findViewById(R.id.editTextcontact);
EditText address= (EditText)v.findViewById(R.id.editText2);
contactNumber.setHint("Your ContactNo Plz");
address.setHint("Your address Plz");
return v;
}
}
View Page Adapter class
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
//This method return the fragment for the every position in the View Pager
#Override
public Fragment getItem(int position) {
if(position == 0) // if the position is 0 we are returning the First tab
{
Tab1 tab1 = new Tab1();
return tab1;
}
else if (position==1){
Tab2 tab2 = new Tab2();
return tab2;
}
else if (position==2){
Tab3 tab3 = new Tab3();
return tab3;
}
else // As we are having 2 tabs if the position is now 0 it must be 1 so we are returning second tab
{
Tab4 tab4=new Tab4();
return tab4;
}
}
// This method return the titles for the Tabs in the Tab Strip
#Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
#Override
public int getCount() {
return NumbOfTabs;
}
}
Edit
In order get reference to your views you should declare that view(s) at class level for e.g
public class Tab1 extends Fragment {
EditTex address,contactNumber;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
contactNumber= (EditText)v.findViewById(R.id.editTextcontact);
address= (EditText)v.findViewById(R.id.editText2);
contactNumber.setHint("Your ContactNo Plz");
address.setHint("Your address Plz");
return v;
}
public String getData(){
return address.getText().toString();
}
}
First declare a global variable to maintain reference to currentPage being displayed
int currentPage = 0; // 0 - because initially 0th page is displayed.
You can get reference to your Fragment using the following method:
private static String makeFragmentName(int viewPagerId, int index) {
return "android:switcher:" + viewPagerId + ":" + index;
}
in the above viewPagerId is your ViewPager's id
You will need to keep a reference for the current page being displayed for this implement addOnPageChangeListener() on ViewPager and in onPageSelected() method update your currentPage variable.
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
currentPage = position;
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
Now in order to get data in onOptionsItemSelected() method you can do like below
// You will need to check for the index manually and get the reference of the current `Fragment` so a solution to this can be like
if(currentPage == 0){
Tab1 tab1 = (Tab1)getSupportFragmentManager().findFragmentByTag(makeFragmentName(R.id.your_view_pager,currentPage));
// always check for null
if(tab1 != null){
String data = tab1.getData();
}
}else if(currentPage == 1){
Tab2 tab2 = (Tab2)getSupportFragmentManager().findFragmentByTag(makeFragmentName(R.id.your_view_pager,currentPage));
if(tab2 != null){
String data = tab2.getData();
}
}
... so on
create method in your fragments to access the data for e.g
public String getData(){
String data = yourEditText.getText().toString();
return data;
}
similarly you can access other data as well, let me know if you require more details
this is nothing but the nested fragment basically fragment inside fragment(nesting) is not supported.your doing the same, Nested fragments are not currently supported. Trying to put a fragment within the UI of another fragment will result in undefined and likely broken behavior of the app..
Related
I'm new to android programming and I can't find a way to switch between tab1 to tab2 in a TabLayout, when the user clicks a button located in the tab1.
It may be something very simple, but I am clueless in my first app.
I have tried the following at first:
TabLayout.Tab tab = tabLayout.getTabAt(1);
tab.select();
And it used to work, but I changed the code and, at some point, it just didn't work anymore.
I also triedtab.getCustomView().setSelected(true);, but I got NullPointerException. So I checked in a if statement if tab was null, and it wasn't.
And then I tried
tabLayout.setScrollPosition(1,0f,true);
ViewPager viewPager = new ViewPager(mainView.getContext());
viewPager.setCurrentItem(1);
But none of the solutions above worked for me.
Here is my code:
View view;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
try {
view = inflater.inflate(R.layout.fragment_main, container, false);
Button GoB = view.findViewById(R.id.GoB);
final EditText USETV = view.findViewById(R.id.USETV);
final EditText commandEV = view.findViewById(R.id.CommandTV);
final SqlHelper db = new SqlHelper(getContext(), "myDatabase", null, 1);
GoB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
String a = "";
if (USETV.getText().toString().length() > 0) {
a += "USE " + USETV.getText().toString() + " ;";
}
a += commandEV.getText().toString();
String[][] c = db.SqlQuery(a);
LayoutInflater factory = getLayoutInflater();
View resultView = factory.inflate(R.layout.fragment_result, null);
TableLayout tableLayout = resultView.findViewById(R.id.ResultContainer);
tableLayout.removeAllViews();
View mainView = factory.inflate(R.layout.main_activity,null);
TabLayout tabLayout = mainView.findViewById(R.id.tabs);
if (c[0].length > 0 && c[1].length > 0) {
TabLayout.Tab tab = tabLayout.getTabAt(1);
//tab.select();
//tab.getCustomView().setSelected(true);
//tabLayout.setScrollPosition(1,0f,true);
//ViewPager viewPager = new ViewPager(mainView.getContext());
//viewPager.setCurrentItem(1);
//
// do some stuff
}
} catch (Exception e) {
showException(e);
}
}
});
} catch (Exception e) {
showException(e);
}
return view;
}
TabLayout and ViewPager belong to your Activity, so in your Fragment you have to call Activity function to switch tab
Here is an example:
public class MyActivity extends Activity {
private TabLayout mTabLayout;
private ViewPager mViewPager;
#Override
public onCreate(...) {
MyFrament myFragment = new MyFragment(this);
// Add fragment to Viewpager ...
// Attach ViewPager to TabLayout ...
}
public void switchTab(int index) {
// Check index ...
mViewPager.setCurrentItem(index);
}
}
then
public class MyFragment extends Fragment {
private Context mContext;
private Button mButton;
public MyFragment(Context context) {
mContext = context;
}
#Override
public View onCreateView(...) {
...
mButton.setOnClickListener(v->{
((MyActivity)mContext).switchTab(1);
});
...
}
}
Hope this help!
Try putting these two lines inside your button's handler :
ActionBar actionBar = (ActionBar)getActivity().getActionBar();
actionBar.setSelectedNavigationItem(1);
Right Click on your package name
new > activity > tabActivity click ok
Chose layout name whatever you want e.g (Example.java).
Select Navigation style is Action Bar Tabs(which is option 2) and click Finish
5.create two new Fragments
6.Go to the java file here Example.java
After open Example.java file paste the blow code in
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).
switch(position){
case 0:
return new Chats();
case 1:
return new Status();
case 2:
return new Call();
}
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
}
First. Sorry for my English.
I have Activity class with ViewPager as a field and a Fragment class. My activity is a host for a fragment. In Fragment I want to call context menu registered for ImageView. For that, I override 2 methods: onCreateContextMenu and onContextItemSelected.
Problem is:
When onCreateContextMenu is called I get the correct page (that
on the screen now).
But when onContextItemSelected is called I get another page (this
depend on what parameter is set in
ViewPager.setOffscreenPageLimit(int)). For example, if it set 3, the returned page will be those, that on 3 positions to the left or to the right from current that on the screen.
How can I fix it?
Thank you.
Activity code
public class CrimePagerActivity extends FragmentActivity {
private ViewPager mViewPager;
private ArrayList<Crime> mCrimes;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.viewPager);
setContentView(mViewPager);
mCrimes = CrimeLab.get(this).getCrimes();
mViewPager.setOffscreenPageLimit(4);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mViewPager.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
}
FragmentManager fm = getSupportFragmentManager();
mViewPager.setAdapter(new FragmentStatePagerAdapter(fm) {
#Override
public Fragment getItem(int position) {
Crime crime = mCrimes.get(position);
return CrimeFragment.newInstance(crime.getId());
}
#Override
public int getCount() {
return mCrimes.size();
}
});
UUID crimeId = (UUID) getIntent().getSerializableExtra(CrimeFragment.EXTRA_CRIME_ID);
for (int i = 0; i< mCrimes.size(); i++){
if (mCrimes.get(i).getId().equals(crimeId)){
mViewPager.setCurrentItem(i);
break;
}
}
}
}
and fragment code
public class CrimeFragment extends Fragment {
.......
private ImageView mPhotoView;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
........
View v = inflater.inflate(R.layout.fragment_crime, container, false);
mPhotoView = (ImageView) v.findViewById(R.id.crime_imageView);
registerForContextMenu(mPhotoView);
return v;
}
.........
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
Log.i(TAG, mCrime.getTitle());
switch (v.getId()) {
case R.id.crime_imageView:
if (mCrime.getPhoto() != null)
getActivity().getMenuInflater().inflate(R.menu.crime_photo_context, menu);
break;
}
}
#Override
public boolean onContextItemSelected(MenuItem item) {
Log.i(TAG, mCrime.getTitle());
switch (item.getItemId()) {
case R.id.menu_item_delete_photo:
getActivity().deleteFile(mCrime.getPhoto().getFilename());
PictureUtils.cleanImageView(mPhotoView);
mCrime.setPhoto(null);
return true;
}
return super.onContextItemSelected(item);
}
}
ViewPager.setOffscreenPageLimit(int);
This will prepare the pages at both sides to the left and right (neighbours).
By default it is 1.
So, in your case to get the current fragment created by the viewPager.
You can store the fragments when created in an SparseArray by overriding the instantiateItem() and destroyItem() callback of viewPager with position.
private SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
#Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment fragment = (Fragment) super.instantiateItem(container, position);
registeredFragments.put(position, fragment);
return fragment;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
registeredFragments.remove(position);
super.destroyItem(container, position, object);
}
public Fragment getFragment(int position) {
return registeredFragments.get(position);
}
And where you want to get the current fragment, get it by using the getFragment() method by passing the position.
Is it possible to pass a data from fragment to fragment by swipe?
There are many articles teaching us how to pass the data from fragment to fragment, but most of the article or questions had implemented OnClickListener in their first fragment, which used to pass value to another fragment.
But my case is pass the data from two fragments without any button click and finally save them in different tables by clicking button in the last fragment. What can I do to achieve this??
The flow is Information >> WorkForce >>WorkDetailsTable and save them to different table by one button click.
I have tried to work it out but I get NULL value in SQLite. I think I have miss out a lot but have no idea. PLEASE help me...I've been stuck at here for more than two days...Thanks
Tab.java
public class Tab extends ActionBarActivity implements ActionBar.TabListener {
ViewPager Tab;
TabPagerAdapter TabAdapter;
ActionBar actionBar;
public static String name = null;
public static String subContractors = null;
// will be used for data communication
public static Force force_bean;;
public static Info info_bean;
public static Force getForce(){
return force_bean;
}
public static void setForce(Force force){
force_bean=force;
}
public static Info getInfo(){
return info_bean;
}
public static void setInfo(Info info){
info_bean=info;
}
final Activity mActivity = (Activity) this;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tab1);
info_bean = new Info();
force_bean = new Force();
TabAdapter = new TabPagerAdapter(getSupportFragmentManager());
Tab = (ViewPager) findViewById(R.id.pager);
Tab.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar = ((AppCompatActivity) mActivity).getSupportActionBar();
actionBar.setSelectedNavigationItem(position);
}
});
Tab.setAdapter(TabAdapter);
actionBar = ((AppCompatActivity) mActivity).getSupportActionBar();
//Enable Tabs on Action Bar
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
//Add New Tabs
actionBar.addTab(actionBar.newTab().setText("Information").setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("Work Force").setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("Work Details").setTabListener(this));
}
#Override
public void onTabSelected(ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
}
#Override
public void onTabUnselected(ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
}
}
TabPagerAdapter.java
public class TabPagerAdapter extends FragmentStatePagerAdapter {
public TabPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0:
return Information.newInstance("name");
case 1:
return WorkForce.newInstance("SubCon");
case 2:
return WorkDetailsTable.newInstance();
}
return null ;
}
#Override
public int getCount() {
return 3; //No of Tabs you can give your number of tabs
}
Informmation.java
public class Information extends Fragment implements View.OnClickListener {
private Spinner spinner, spinner2, spinner3;
private static String a;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View info = inflater.inflate(R.layout.information, container, false);
dialog = new DateDialog();
spinner = (Spinner)info.findViewById(R.id.spinner);
addItemsOnSpinner();
a= spinner.getSelectedItem().toString();
return info;
}
public static Information newInstance(String a)
{
Information fragment=new Information();
Bundle bundle=new Bundle();
bundle.putString("a",a);
fragment.setArguments(bundle);
return fragment;
}
public void addItemsOnSpinner() {
List<String> list = new ArrayList<String>();
list.add("1 ");
list.add("2");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item, list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
}
WorkForce.java
public class WorkForce extends Fragment {
private static EditText txt1;
private static String subCon;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View work = inflater.inflate(R.layout.workforce, container, false);
txt1 = (EditText) work.findViewById(R.id.editText);
subCon = txt1.getText().toString();
return work;
}
public static WorkForce newInstance(String subCon) {
WorkForce f = new WorkForce();
Bundle bundle = new Bundle();
bundle.putString("subCon", subCon);
f.setArguments(bundle);
return f;
}
}
WorkDetails.java
private com.example.project.project.API.InfoAPI ts;
private com.example.project.project.API.WorkDetailsAPI WD;
private com.example.project.project.API.WorkForceAPI WF;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View workDetails = inflater.inflate(R.layout.tableworkdetails, container, false);
getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
spinnerTra = (Spinner) workDetails.findViewById(R.id.spinner6);
addItemsOnSpinner();
Button btn1 = (Button)workDetails.findViewById(R.id.button2);
WD = new com.example.project.project.API.WorkDetailsAPI(getActivity());
ts = new com.example.project.project.API.InfoAPI(getActivity());
WF = new com.example.project.project.API.WorkForceAPI(getActivity());
a1 = spinnerTra.getSelectedItem().toString();
Bundle bundle = new Bundle();
final String name = bundle.getString("a");
final String subContractors = bundle.getString("subCon");
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
add(name, subContractors);
}
});
return workDetails;
}
public void add(String name,String subContractors)
{
Toast.makeText(getActivity(),+name+subContractors, Toast.LENGTH_SHORT).show();
ts.insertTimeSheet(name);
WF.insertWorkForce(subContractors);
}
Note: My case is pass the data from two fragments without any button click and finally save them in different tables by clicking button in the last fragment.
If I understand your problem correctly, you are essentially implementing something a little bit like a "Wizard" where each step passes information to the next step as you swipe between the tabs or select them.
So in reality your problem is how to get the information out of a fragment when it is deselected and into a fragment when selected.
At the simplest level I would suggest your activity holds the "master" copy of all of the information and passes it into/takes it from each fragment in your tab pager adapter.
You would need some kind of "Domain" object to hold all the information you need to collect. Each tab would only update the bits of information it cares about..
public class WorkData {
string information;
string subCon;
... etc..
}
You add an instance of this to hold the master copy to your "tab" activity:
public class Tab extends ActionBarActivity implements ActionBar.TabListener {
...
WorkData workData = new WorkData();
...
I would then suggest a simple interface that each of your "tab" fragments implement; something like:
public interface DataUpdate {
void setData(WorkData data);
WorkData getData();
}
Each of your tab fragments would implement this interface, updating the WorkData as required..
public class WorkForce extends Fragment implements DataUpdate {
...
private WorkData workData; // this fragment's "copy" of the data
...
#Override
public WorkData getData() {
this.workData.subCon = this.subCon; // Assuming subcon has been updated.. else use txt1.getText();
return this.workData;
}
#Override
public void setData(WorkData workData) {
this.workData = workData;
// Update this page's views with the workData...
// This assumes the fragment has already been created and txt1 is set to a view
txt1.setText(workData.subCon);
this.subCon = workData.subCon; // Actually could just use subCon in workData, but be aware that workData actually points to the Activity's copy (kinda makes getdata redundant.. but I like symmetry and couldn't be bothered making lots of copies of the object).
}
Then you just need to add the code to pass the data backwards and forwards.. in your "Tab" activity which looks like...
#Override
public void onTabSelected(ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
int position = tab.getPosition();
DataUpdate dataUpdate = (DataUpdate) TabAdapter.getItem(position);
// Pass the master workdata to the selected fragment
dataUpdate.setData(this.workData);
}
#Override
public void onTabUnselected(ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
int position = tab.getPosition();
DataUpdate dataUpdate = (DataUpdate) TabAdapter.getItem(position);
// Update the master workdata from the unselected fragment
this.workData = dataUpdate.getData();
}
#Override
public void onTabReselected(ActionBar.Tab tab, android.support.v4.app.FragmentTransaction ft) {
// This might be pointless, but we'll do it anyway..
int position = tab.getPosition();
DataUpdate dataUpdate = (DataUpdate) TabAdapter.getItem(position);
// Pass the master workdata to the selected fragment
dataUpdate.setData(this.workData);
}
An important thing to notice here is that your TabPagerAdapter will create a new fragment every time you call getItem().. that will mean that we will never get any updates because each time we try to get the fragment it returns a new, empty fragment. We need to change this so that the fragments are still created when first asked for, but only created once so that we don't keep throwing away our work.
public class TabPagerAdapter extends FragmentStatePagerAdapter {
private static final int NUMBER_OF_TABS = 3;
private Fragment[] tabList = new Fragment[NUMBER_OF_TABS];
public TabPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
if (tabList[i] != null) {
// Return a tab we created earlier..
return tabList[i];
} else {
switch (i) {
case 0:
tabList[0] = Information.newInstance("name");
return tabList[0];
case 1:
tabList[1] = WorkForce.newInstance("SubCon");
return tabList[1];
case 2:
tabList[2] = WorkDetailsTable.newInstance();
return tabList[2];
}
}
return null ;
}
#Override
public int getCount() {
return NUMBER_OF_TABS;
}
Hope this helps. Good luck :-)
Although C James provides good tips to solve your problems, I would like to introduce another way without using implementing of interfaces. Please check below link out. If you use an event bus library such a http://square.github.io/otto/, you can easily pass data you want to share among fragments and even activities. Additionally, you can reduce a lot of code line since it only requires Sender(PUBLISHING), Receiver(Subscriber) while implementation of interfaces requires additional lines of code.
Here is a tutorial of Otto libarary.
http://www.vogella.com/tutorials/JavaLibrary-EventBusOtto/article.html
Hope it helps :)
I would more go the Observer Pattern way.
Each Fragments changes an POJO with is rendered in your Fragments in some way. You simply have to Observe the pojo in your Fragments. Changing Fragments will notify interested observers without knowing them.
I believe that's a much cleaner way to implement this.
Fragment A -> PojoInstance.setXY("foo");
Fragment A -> informs the Observers which e.b Informs Fragment B:
Fragment B will see the change tru the Observer.
Because ViewPagers or other Components will cache Fragments thats a way to get information in already created Fragments, even when their are not seen.
You could also try to use an EventBus where you pass the POJO around.
To transfer data from one fragment to another fragment when swipe is performed ,firstly you should get the view of the each fragment.here is the sample code that can help you out a bit.
write this code in Activity:
mviewpager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
mviewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
adapter = ((SOFragmentPagerAdapter) mviewpager.getAdapter());
//getting the view of fragments at positions
if(position==0)
{
View v = null;
Fragment1=(Fragment1)adapter.getFragment(position);
v=fragment1.getMyView();//this is how you get the view
ListView lv=(ListView)v.findViewById(R.id.lv_services);
ArrayAdapter<String> arrayAdapter=new ArrayAdapter<String>(SOListItemSelectedActivity.this,android.R.layout.simple_list_item_1,soRequestFragment.al_list_of_services);
lv.setAdapter(arrayAdapter);
}
if(position==1)
{
}
}
#Override
public void onPageSelected(int position) {
if(position==0)
{
View v = null;
soRequestFragment=(SORequestFragment)adapter.getFragment(position);
v=soRequestFragment.getMyView();
}
if(position==1)
{
}
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
mviewpager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
and create a FragmentPagerAdapter as:
public class SOFragmentPagerAdapter extends FragmentPagerAdapter {
HashMap<Integer,Fragment> mPageReferenceMap;
int mNumOfTabs;
public SOFragmentPagerAdapter(FragmentManager fm,int mNumOfTabs) {
super(fm);
this.mNumOfTabs=mNumOfTabs;
mPageReferenceMap=new HashMap<Integer,Fragment>();
}
#Override
public Fragment getItem(int position) {
switch (position)
{
case 0:
Fragment1 fragment1=new tFragment1();
mPageReferenceMap.put(position,fragment1);
return fragment1;
case 1:
Fragment2 fragment2=new Fragment2();
mPageReferenceMap.put(position,fragment2);
return fragment2;
default:
return null;
}
}
public Fragment getFragment(int key) {
return mPageReferenceMap.get(key);
}
#Override
public int getCount() {
return 2;
}}
In Fragments add the getmyview() which will return the view of that fragment as:
public void getmyview()
{
return myview;//myview is fragment view which you will return in oncreateview method
}
Note: Viewpager execute onpagescroll first and get the position 0,1 and when you scroll ,views at position 1,2 will execute and page selected 0 will execute.
For tabselections: Tabunselected,Tabselected Tab reselected is the sequence of execution.
so write accordingly in the respective positions of fragments.
Hope this helps you.
This is one of my first apps. I want to know how I can detect what sliding tab the user is currently on. I know it in ViewPagerAdapter but I can't do anything because it's a fragment. How can I access this information?
MainActivity.java
public class MainActivity extends AppCompatActivity {
Toolbar mToolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[] = {"Factorial", "Permutation", "Random"};
int Numboftabs = 3;
FloatingActionButton fab;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.fab_pressed);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.show(false);
//Animation FAB
Animation animation = AnimationUtils.loadAnimation(this, R.anim.simple_grow);
fab.startAnimation(animation);
}
#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) {
Toast.makeText(this, "Text", Toast.LENGTH_SHORT).show();
Animation animation = AnimationUtils.loadAnimation(this, R.anim.simple_grow);
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.startAnimation(animation);
return true;
}
return super.onOptionsItemSelected(item);
}
}
ViewPagerAdapter.java
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
//This method return the fragment for the every position in the View Pager
#Override
public Fragment getItem(int position) {
if(position == 0) // if the position is 0 we are returning the First tab
{
FactorialTab factorialTab = new FactorialTab();
return factorialTab;
} else if(position == 1) // As we are having 2 tabs if the position is now 0 it must be 1 so we are returning second tab
{
PermutationTab permutationTab = new PermutationTab();
return permutationTab;
}
else {
RandomTab randomTab = new RandomTab();
return randomTab;
}
}
// This method return the titles for the Tabs in the Tab Strip
#Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
#Override
public int getCount() {
return NumbOfTabs;
}
}
RandomTab.java (one of the sliding tabs)
public class RandomTab extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab_random, container, false);
return v;
}
}
Set an OnPageChangeListener to your ViewPager
pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
if (position == WHATEVER) {
//do what you want
}
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
I am trying to open a fragment, when a dialog is clicked inside another fragment. I am using ActionBarSherlock with Tab. My fragment is attached in the view pager. I have almost done the job. But I can't replace a new fragment inside a view pager. I got an error. I read the thread here. The solution isn't clear.
Error:
10-18 21:34:40.379: E/AndroidRuntime(19618): FATAL EXCEPTION: main
10-18 21:34:40.379: E/AndroidRuntime(19618):
java.lang.IllegalArgumentException: No view found for id 0x7f040032
(com.example.actionbartestwithsherlock:id/pager) for fragment
AllContactsFragment{41fd4ba0 #0 id=0x7f040032} 10-18 21:34:40.379:
E/AndroidRuntime(19618): at
android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:903)
I have three fragment associates with pager named FragmentTab1,FragmentTab2 & FragmentTab3.
My MainActivity & FragmentAdapter looks like below:
public class MainActivity extends SherlockFragmentActivity {
ActionBar.Tab Tab1, Tab2, Tab3, Tab4;
private Context context = this;
// view pager
// Declare Variables
ActionBar actionBar;
ViewPager mPager;
Tab tab;
FragmentAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// set application in portrait mode
ActivityHelper.initialize(this);
actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Locate ViewPager in activity_main.xml
mPager = (ViewPager) findViewById(R.id.pager);
// add an adapter to pager
mPager.setAdapter(new FragmentAdapter(getSupportFragmentManager(),
mPager, actionBar));
addActionBarTabs();
}
private void addActionBarTabs() {
String[] tabs = { "Tab 1", "Tab 2", "Tab 3" };
for (String tabTitle : tabs) {
ActionBar.Tab tab = actionBar.newTab().setText(tabTitle)
.setTabListener(tabListener);
actionBar.addTab(tab);
}
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
}
private ActionBar.TabListener tabListener = new ActionBar.TabListener() {
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
mPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
};
class FragmentAdapter extends FragmentPagerAdapter implements
ViewPager.OnPageChangeListener {
private ViewPager mViewPager;
final int TOTAL_PAGES = 3;
public FragmentAdapter(FragmentManager fm, ViewPager pager,
ActionBar actionBar) {
super(fm);
this.mViewPager = pager;
this.mViewPager.setOnPageChangeListener(this);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return FragmentTab1.newInstance();
case 1:
return FragmentTab2.newInstance();
case 2:
return FragmentTab3.newInstance();
default:
throw new IllegalArgumentException(
"The item position should be less or equal to:"
+ TOTAL_PAGES);
}
}
#Override
public int getCount() {
return TOTAL_PAGES;
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
}
}
Now, Inside my first tab FragmentTab1, I open a customized dialog when a button clicks. I want to replace new fragment AllContactsFragment in FragmentTab1 when the dialog options are selected.
FragmentTab1 fragment class:
public class FragmentTab1 extends SherlockFragment implements OnClickListener {
Button btnTest;
ViewPager pager;
LinearLayout layoutBlockNumbers;
LinearLayout layoutContact, layoutCallLog, layoutSMSLog, layoutManually;
Context context;
CustomizedDialog dialog;
private static final int CONTACT_PICKER_RESULT = 1001;
private static final String DEBUG_TAG = "Contact List";
private static final double RESULT_OK = -1;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragmenttab1, container,
false);
layoutBlockNumbers = (LinearLayout) rootView
.findViewById(R.id.layoutAddBlockNumbers);
layoutBlockNumbers.setOnClickListener(this);
return rootView;
}
#Override
public void onClick(View v) {
if (v == layoutCallLog) {
dialog.dismiss();
// want to replace new fragment at position 0 in pager
// problem is here ??? how to open new fragmnet
Fragment allContactsFragment = AllContactsFragment.newInstance();
FragmentTransaction transaction = getChildFragmentManager()
.beginTransaction();
transaction.addToBackStack(null);
transaction.replace(R.id.pager, allContactsFragment).commit();
}
if (v == layoutBlockNumbers) {
// open a dialog
showDialog();
} else if (v == layoutContact) {
openContactList();
dialog.dismiss();
} else if (v == layoutSMSLog) {
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
}
// open a dialog
private void showDialog() {
dialog = new CustomizedDialog(getActivity());
dialog.setContentView(R.layout.dialog_add_number_type);
dialog.setTitle("Add Black List Number");
//initialize all linear layouts in dialog
layoutCallLog = (LinearLayout) dialog.findViewById(R.id.layoutCallLog);
layoutContact = (LinearLayout) dialog.findViewById(R.id.layoutContact);
layoutSMSLog = (LinearLayout) dialog.findViewById(R.id.layoutSMSLog);
layoutManually = (LinearLayout) dialog
.findViewById(R.id.layoutManually);
// add listener to several linear layout
layoutContact.setOnClickListener(this);
layoutCallLog.setOnClickListener(this);
layoutSMSLog.setOnClickListener(this);
layoutManually.setOnClickListener(this);
dialog.show();
}
public static Fragment newInstance() {
Fragment f = new FragmentTab1();
return f;
}
}
activity_main.xml looks like below :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</android.support.v4.view.ViewPager>
</RelativeLayout>
Can anybody can help me to solve this issue? Sorry for the massive code.
I'm not sure you can do things the way you want to. A ViewPager is not set up the same way a normal container/fragment set up would be. In a ViewPager you're not using fragment transactions to add fragments but rather an adapter that loads instances of fragments from a backing list.
Replacing the fragment would then work as follows:
(1) Create an instance of the fragment you want to add
(2) Add that fragment to the list that is backing your PagerAdapter
(3) Display the new fragment
(4) Remove the old one
The problem with implementing this in your current project is the set up of your adapter. Currently you are using a switch statment that can only return a fixed number of fragments. Your adapter should be set up something like this.
class MyPageAdapter extends FragmentPagerAdapter{
private List<Fragment> fragments
public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
#Override
public Fragment getItem(int position) {
return this.fragments.get(position);
}
#Override
public int getCount() {
return this.fragments.size();
}
}
Then you can just add a method to your adapter class to add or remove new fragments. If you know the index of the fragment you want to replace accomplishing this should be pretty easy. All you have to do is create a new instance of the contacts fragment, add it to your array or list. This Post explains how a ViewPager handles the adding/removing of new content and how to ensure your new fragment is displayed.
After I read this post I solved the answer.
I just add an ID android:id="#+id/fragmentTabLayout1 to top layout of my fragmenttab1.xml . Then call
new fragment as usual:
Fragment allContactsFragment = AllContactsFragment.newInstance();
FragmentTransaction transaction = getChildFragmentManager()
.beginTransaction();
transaction.addToBackStack(null);
// use this id to replace new fragment
transaction.replace(R.id.fragmentTabLayout1, allContactsFragment).commit();