Develop Reference

Changing fragments onClick of a button

I am trying to change the fragment when I click on a button. The button is inside a fragment and I want to go to another fragment. This code is not giving any error but not changing to desired fragment. It is just showing the background of container. Please help me why it is just showing the color of container and not changing to new fragment.
Here is my first Fragment-
public class IntroFragment1 extends Fragment {
public IntroFragment1() {
// Required empty public constructor
}
public static IntroFragment1 newInstance() {
return new IntroFragment1();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_intro1, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
/**
* Button to go to next tab in tutorial
* */
Button nextScreen = getView().findViewById(R.id.nextTabButtonIntro);
nextScreen.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (vb1 != null) {
vb1.vibrate(300);
}
FragmentTransaction transaction = getFragmentManager().beginTransaction();
Fragment frag = IntroFragment2.newInstance();
transaction.replace(R.id.containerIntroScreen, frag);
transaction.commit();
}
});
}//End of onViewCreated
}
This is the XML of first Fragment. The next Button should take me to next fragment-
<LinearLayout 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:background="#color/colorPrimaryDark"
android:orientation="vertical"
android:weightSum="1"
tools:context="com.example.fitbitsampleapp.AppIntroTabbedView.IntroFragment1">
<TextView
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fontFamily="casual"
android:text="Track your daily activities. Stay healthy, Stay smart."
android:textSize="26dp" />
<Button
android:id="#+id/skipIntoButton"
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_marginBottom="20dp"
android:layout_marginRight="20dp"
android:layout_weight="1"
android:background="#drawable/background_button"
android:fontFamily="casual"
android:text="skip"
android:textAllCaps="true"
android:textAppearance="#android:style/TextAppearance.DeviceDefault.Large"
android:textColor="#000" />
<Button
android:id="#+id/nextTabButtonIntro"
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_marginBottom="20dp"
android:layout_marginRight="20dp"
android:layout_weight="1"
android:background="#drawable/background_button"
android:fontFamily="casual"
android:text="next"
android:textAllCaps="true"
android:textAppearance="#android:style/TextAppearance.DeviceDefault.Large"
android:textColor="#000" />
</LinearLayout>
This is the fragment, I want to go to-
public class IntroFragment2 extends Fragment {
public IntroFragment2() {
// Required empty public constructor
}
public static android.support.v4.app.Fragment newInstance() {
IntroFragment2 fragment = new IntroFragment2();
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_intro2, container, false);
}
The XML of the 2nd Fragment-
<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:background="#color/colorAccent"
tools:context="com.example.fitbitsampleapp.AppIntroTabbedView.IntroFragment2">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_gravity="center"
android:text="2nd fragment" />
</RelativeLayout>
This is the layout of activity which has the fragments-
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.fitbitsampleapp.AppIntroTabbedView.IntroScreen">
<android.support.v4.view.ViewPager
android:background="#00F111"
android:id="#+id/containerIntroScreen"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
So initially the app opens with 1st transaction as expected. However when I click on next button in fragment 1, it should take me to fragment 2. But it just shows the Background color of ViewPager after the Fragment Transaction.
EDIT:
Here is my Main Activity as well which has the fragments-
public class IntroScreen extends AppCompatActivity {
public static Vibrator vb1;
public Button nextScreen;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_intro_screen);
/***/
vb1 = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
/**
* Create the adapter that will return a fragment
* for each of the N primary sections of the activity.
* */
SectionsPagerAdapter mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
/** Set up the ViewPager with the sections adapter.*/
ViewPager mViewPager = findViewById(R.id.containerIntroScreen);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
private SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
switch (position) {
case 0:
return IntroFragment1.newInstance();
case 1:
return IntroFragment2.newInstance();
default:
return IntroFragment2.newInstance();
}
}
#Override
public int getCount() {
return 2;
}
}
}

SOLVED BY #MikeM. in the comments above.
Since I was already using a ViewPager, All that was required was to give the correct item number to my ViewPager.
int THE_POSITION_OF_THE_FRAGMENT_IN_VIEW_PAGER = 1;
mViewPager.setCurrentItem(THE_POSITION_OF_THE_FRAGMENT_IN_VIEW_PAGER);

how to store user input and populate listview from data in mysql database

i have a tabbed layout with fragments on each page. on the first page there is a user input box and button that when inputted and clicked gives a toast. i would like to store the string of data in my mysql database and populate the list view on another fragment with data stored in the table from mysql. Was wondering how to go about this exactly?
main activity class
public class MainActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from activity_main.xml
setContentView(R.layout.activity_main);
// Locate the viewpager in activity_main.xml
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
// Set the ViewPagerAdapter into ViewPager
viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
}
public void btnShout(View v) {
//allows for label to be changed to shouted once button is pressed
EditText txtInput = (EditText) findViewById(R.id.txtInput);
TextView lblShout = (TextView) findViewById(R.id.lblShout);
lblShout.setText("Shouted! ");
//allows for toast to be displayed once button is clicked
Toast toast = new Toast(getApplicationContext());
toast.setGravity(Gravity.TOP | Gravity.LEFT, 0, 0);
toast.makeText(MainActivity.this, txtInput.getText() + " Has Been Shouted.", toast.LENGTH_SHORT).show();
}
here is my activity main xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.view.PagerTabStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:textColor="#000000" />
<ListView
android:id="#+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</android.support.v4.view.ViewPager>
viewpageradapter class
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
final int PAGE_COUNT = 3;
// Tab Titles
private String tabtitles[] = new String[] {"Home","Shouts","Shouts" };
Context context;
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return PAGE_COUNT;
}
public Fragment getItem(int position) {
switch (position) {
// Open Fragment home.java
case 0:
FragmentHome fragmenthome = new FragmentHome();
return fragmenthome;
// Open Fragment shouters.java
case 1:
FragmentShouts fragmentshouts = new FragmentShouts();
return fragmentshouts;
case 2:
FragmentShouts fragmentShouts = new FragmentShouts();
return fragmentShouts;
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
here is my tab with the user input (home fragment class)
public class FragmentHome extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragment home.xml
View view = inflater.inflate(R.layout.fragmenthome, container, false);
return view;
}
here is fragment home xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="New Shout"
android:id="#+id/lblShout"
android:layout_marginBottom="134dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/txtInput"
android:layout_alignTop="#+id/lblShout"
android:layout_alignParentStart="true"
android:layout_marginTop="41dp"
android:layout_alignParentEnd="true"
android:hint="Enter New Shout..." />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SHOUT"
android:id="#+id/button"
android:layout_below="#+id/txtInput"
android:layout_centerHorizontal="true"
android:onClick="btnShout" />
</RelativeLayout>
here is the fragment with the listview (shouts fragment class)
public class FragmentShouts extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragment shouts.xml
View view = inflater.inflate(R.layout.fragmentshouts, container, false);
return view;
}
here is the fragment shouts xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:contextClickable="true">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/listView"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>

my fragment is still in the UI

this is my first fragment which open a fragment through xml layout
public class ListFrag extends SherlockFragment implements OnItemClickListener
{
Context c;
List<ReferalRow> referal_RowItems;
DoctorDaoImpl doctorDao;
DoctorServiceImpl service;
DoctorValidator doctorValidator;
View layoutView;
ListView doctoListView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
layoutView = inflater.inflate(R.layout.activity_refer_mangmnt, null);
return layoutView;
}
and this is my activity_refer_mangmnt.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="5dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2"
android:padding="2dp">
<ListView
android:id="#+id/listView_refer_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:dividerHeight="1dp"
android:divider="#android:color/black"
android:choiceMode="singleChoice"
android:listSelector="#drawable/list_selector" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/rightpanel_back">
<fragment
android:id="#+id/detail_fragment"
android:tag="detailfrag"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.example.app1.DetailsFrag" />
</LinearLayout>
`</LinearLayout>
and this is my DetailFrag class
public class DetailsFrag extends SherlockFragment
{
ExpandableListView detailList;
TextView tvMessage;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
contentView = inflater.inflate(R.layout.activity_refer_view, null);
detailList = (ExpandableListView) contentView.findViewById(R.id.ep_detail_view);
tvMessage = (TextView)contentView.findViewById(R.id.tv_textView);
return contentView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
if(id==0)
{
detailList.setVisibility(View.GONE);
tvMessage.setText("Click on the item on the left panel to view the details");
}
else
{
detailList.setVisibility(View.VISIBLE);
tvMessage.setVisibility(View.GONE);
}
and this is my onItem click listener in LIstFrag
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment lastFrag = getFragmentManager().findFragmentByTag("detailfrag");
if(lastFrag!=null)
ft.remove(lastFrag);
Fragment fragment = Fragment.instantiate(c, DoctorDetailsFrag.class.getName(),arguments);
ft.replace(R.id.detail_fragment, fragment);
ft.commit();
i need when first time i want to display a message in the right panel after click on the item in the list i want to disappear that message. but here the message is not remove from the fragment. its displayed in the backgrnd of new fragment. y it is?

Try:
ft.addToBackStack(null)
after you call: ft.remove(lastFrag);
Perhaps this link can help you to understand this transaction:
http://developer.android.com/guide/components/fragments.html#Transactions
Another way is to to reuse your lastFrag when it's not null. Then you need a method in your DetailFrag that is called from your clickListener.

Replacing fragments within viewpager

I am currently having an issue with replacing a certain fragment within ViewPager with another. The fragment id like to replace is my "Departments" which has an Imagebutton id like to use to begin the replacement. I've tried to apply some suggestions from other similar questions (most of which were old and prior to the new api release which allows for nested fragments) and have had no success. Would using nested fragments be easier? I am new to android app development so any help would be great. Thanks in advance.
here is my FragmentAcitivty
public class ViewPagerStyle extends FragmentActivity {
private ViewPager mViewPager;
private ViewPagerAdapter adapter;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setUpView();
setTab();
}
private void setUpView(){
mViewPager = (ViewPager) findViewById(R.id.viewPager);
adapter = new ViewPagerAdapter(getApplicationContext(),getSupportFragmentManager());
mViewPager.setAdapter(adapter);
mViewPager.setCurrentItem(0);
}
private void setTab(){
mViewPager.setOnPageChangeListener(new OnPageChangeListener(){
#Override
public void onPageScrollStateChanged(int position) {}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {}
#Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
switch(position){
case 0:
findViewById(R.id.first_tab).setVisibility(View.VISIBLE);
findViewById(R.id.second_tab).setVisibility(View.INVISIBLE);
findViewById(R.id.third_tab).setVisibility(View.INVISIBLE);
break;
case 1:
findViewById(R.id.first_tab).setVisibility(View.INVISIBLE);
findViewById(R.id.second_tab).setVisibility(View.VISIBLE);
findViewById(R.id.third_tab).setVisibility(View.INVISIBLE);
break;
case 2:
findViewById(R.id.first_tab).setVisibility(View.INVISIBLE);
findViewById(R.id.second_tab).setVisibility(View.INVISIBLE);
findViewById(R.id.third_tab).setVisibility(View.VISIBLE);
break;
}
}
});
}
}
FragmentPagerAdapter
public class ViewPagerAdapter extends FragmentPagerAdapter {
private Context _context;
public ViewPagerAdapter(Context context, FragmentManager fm) {
super(fm);
_context = context;
}
#Override
public Fragment getItem(int position) {
Fragment f = new Fragment();
switch(position){
case 0:
f=PubView.newInstance(_context);
break;
case 1:
f=MyView.newInstance(_context);
break;
case 2:
f=Departments.newInstance(_context);
break;
}
return f;
}
#Override
public int getCount() {
return 3;
}
}
Departments Fragment with button
public class Departments extends Fragment {
public static Fragment newInstance(Context context) {
Departments f = new Departments();
return f;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View root = (View) inflater.inflate(R.layout.activity_departments, null);
ImageButton engineeringButton = (ImageButton)root.findViewById(R.id.engineeringButton);
engineeringButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
Fragment newFragment = Engineering.newInstance(null);
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.addToBackStack(null);
transaction.replace(R.id.viewPager, newFragment).commit();
}
});
return root;
}
}
Also, here is my main.xml file which hosts the viewpager
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#color/purple"
android:orientation="vertical" >
<TableLayout
style="#style/layout_f_w"
android:stretchColumns="*" >
<TableRow
android:id="#+id/tableRow1"
style="#style/layout_wrap"
android:background="#color/white" >
<!-- First Tab -->
<LinearLayout
android:id="#+id/first_text"
style="#style/layout_f_w"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
style="#style/text_title"
android:text="pubView"
android:textColor="#color/purple" />
</LinearLayout>
<!-- Second Tab -->
<LinearLayout
android:id="#+id/second_text"
style="#style/layout_f_w"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
style="#style/text_title"
android:gravity="center"
android:text="myView"
android:textColor="#color/purple" />
</LinearLayout>
<!-- Third Tab -->
<LinearLayout
android:id="#+id/third_text"
style="#style/layout_f_w"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
style="#style/text_title"
android:text="Dept."
android:textColor="#color/purple" />
</LinearLayout>
</TableRow>
</TableLayout>
<!-- Include Tab Indicator -->
<include
android:layout_width="fill_parent"
android:layout_height="wrap_content"
layout="#layout/indicator" />
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="fill_parent"
android:layout_height="450dp" />
<ImageButton
android:id="#+id/settingsButton"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginLeft="50dp"
android:background="#drawable/settings_button"
android:src="#drawable/settings_button" />
</LinearLayout>
One thing i am confused on is that I don't know which id to put into the first argument of transaction.replace(r.id.viewPager, newfragment)...Ive read that it needs the id of the container but when I use this I receive the runtime error from logcat:
04-13 21:41:48.680: E/AndroidRuntime(960): java.lang.IllegalArgumentException: No view found for id 0x7f0a0029 (com.pvcalendar:id/viewPager) for fragment Engineering{4089a730 #0 id=0x7f0a0029}

I think the point is to use a fragment as a container.
In your ViewPagerAdapter:
#Override
public Fragment getItem(int position) {
/*
* IMPORTANT: This is the point. We create a RootFragment acting as
* a container for other fragments
*/
if (position == 0)
return new RootFragment();
else
return new StaticFragment();
}
RootFragment layout should look like:
<FrameLayout 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:id="#+id/root_frame" >
</FrameLayout>
And directly, you fill it with your first "real" fragment:
public class RootFragment extends Fragment {
private static final String TAG = "RootFragment";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
/* Inflate the layout for this fragment */
View view = inflater.inflate(R.layout.root_fragment, container, false);
FragmentTransaction transaction = getFragmentManager()
.beginTransaction();
/*
* When this container fragment is created, we fill it with our first
* "real" fragment
*/
transaction.replace(R.id.root_frame, new FirstFragment());
transaction.commit();
return view;
}
}
Finally, you can replace fragments. For instance, inside your "real" fragment you could have a button:
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
FragmentTransaction trans = getFragmentManager()
.beginTransaction();
/*
* IMPORTANT: We use the "root frame" defined in
* "root_fragment.xml" as the reference to replace fragment
*/
trans.replace(R.id.root_frame, new SecondFragment());
/*
* IMPORTANT: The following lines allow us to add the fragment
* to the stack and return to it later, by pressing back
*/
trans.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
trans.addToBackStack(null);
trans.commit();
}
});
I've developed an example application that shows a similar concept. You could replace a fragment inside a ViewPager without changing to a new Activity. The code is available in:
https://github.com/danilao/fragments-viewpager-example

I'm assuming you want the Engineering fragment to be on a completely new page, because you aren't using it in your ViewPagerAdapter. If that's the case, create a new Activity, with your Engineering fragment in the layout, and launch the Activity from the engineeringButton click.
The problem is you are trying to shove your Engineering fragment into the View hierarchy of R.layout.activity_departments, and there is (hopefully) no ViewPager in there, hence the error.

Android: how to get the views of a Fragment

In a class i am adding a Fragment programatically.
This Fragment contains a Button, which i want to have an onClick implementation.
Here is the class i have:
public class ShareProduct extends SherlockFragmentActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.share_product);
FragmentManager fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
ProductFragment1 fragment = new ProductFragment1();
fragmentTransaction.add(R.id.share_product_parent, fragment);
fragmentTransaction.commit();
Button done_button = (Button) fragment.getView().findViewById(
R.id.done_product_1);
done_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
ProductFragment2 fragment = new ProductFragment2();
fragmentTransaction
.replace(R.id.share_product_parent, fragment);
fragmentTransaction.commit();
}
});
}
}
and my ProductFragment1 class is:
public class ProductFragment1 extends SherlockFragment {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater
.inflate(R.layout.share_product_1, container, false);
return view;
}
}
and the layout my main class uses is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/share_product_parent"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="right|center_vertical"
android:orientation="horizontal" >
</RelativeLayout>
and the layout my ProductFragment1 uses is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/tv1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="25dp" />
<EditText
android:id="#+id/et1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/tv1"
android:textSize="25dp" />
<Button
android:id="#+id/done_product_1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/et1"
android:text="Done" />
</RelativeLayout>
The problem is:
I am getting a NullPointerException at this line in my main class:
Button done_button = (Button) fragment.getView().findViewById(R.id.done_product_1);
done_button.setOnClickListener ....
when i searched for what getView() on a fragment returns. I found out that it returns the view from onCreateView();
I checked it doesn't return null.
Thank You

You are on the wrong track here. You get the NPE because the Fragments views is not created yet. Fragments also have a lifecycle just like Activities.
What you should be doing is assigning the OnClickListener inside your Fragments onViewCreated() method. And from there... you should create a callback and notify your hosting Activity of the event.