I have several fragments here and there's this one fragment where I want to save its state when I get back to it. I tried doing it in a testfragment where, when I click the button, the textview text will change to "test1"(The default text of the textview is "New Text"). So the textview changes the text, but when I move into another fragment and get back to it (HomeFragment), the textview is going to its default state text ("New Text"). So I think the savedInstanceState is not working because if it does, it should have "test1" when I get back to the fragment. Here's my code:
public class HomeFragment extends Fragment {
public Button button;
public TextView txt_test;
public String data_test;
public HomeFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
return view;
}
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
if(savedInstanceState == null){
}
else{
data_test = savedInstanceState.getString("txt_test");
txt_test = (TextView) getActivity().findViewById(R.id.textView2);
txt_test.setText(data_test);
}
button = (Button) getActivity().findViewById(R.id.button3);
txt_test = (TextView) getActivity().findViewById(R.id.textView2);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
txt_test.setText("test1");
}
});
}
public void onSaveInstanceState(Bundle savedInstanceState){
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putString("txt_test",data_test);
}
}
public class HomeFragment extends Fragment {
Button button;
TextView txt_test;
String data_test;
public HomeFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
txt_test = (TextView) view.findViewById(R.id.textView2);
button = (Button) view.findViewById(R.id.button3);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
txt_test.setText("test1");
}
});
if(savedInstanceState == null) {
// do nothing
} else {
data_test = savedInstanceState.getString("txt_test");
txt_test.setText(data_test);
}
return view;
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState){
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putString("txt_test",data_test);
}
}
Related
Code :
public class CustomerDetails extends Fragment {
EditText CustomerCode,FullName,AddressLine1,AddressLine2,MobileNo,EmailId,CustomerType;
Button Submit;
IonExchangeDataBasehelper ionexchangedatabase;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
//super.onCreate(savedInstanceState);
// View v =inflater.inflate(R.layout.fragment_customer_details,container,false);
View v =getActivity().getLayoutInflater().inflate(R.layout.fragment_customer_details,null);
CustomerCode=(EditText)v.findViewById(R.id.CustomerCode);
FullName=(EditText)v.findViewById(R.id.FullName);
AddressLine1=(EditText)v.findViewById(R.id.AddressLine1);
AddressLine2=(EditText)v.findViewById(R.id.AddressLine2);
MobileNo=(EditText)v.findViewById(R.id.MobileNo);
EmailId=(EditText)v.findViewById(R.id.EmailId);
CustomerType=(EditText)v.findViewById(R.id.CustomerType);
Submit=(Button)v.findViewById(R.id.Submit);
Submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String abc = CustomerCode.getText().toString();
Toast.makeText(getActivity(),"hhh :" ,Toast.LENGTH_SHORT).show();
// database();
}
});
return v;
}
Cleaned your code; try it and say if you still get errors
public class CustomerDetails extends Fragment {
EditText customerCode,fullName,addressLine1,addressLine2,mobileNo,emailId,customerType;
Button submit;
IonExchangeDataBasehelper ionexchangedatabase;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
v = inflater.inflate(R.layout.fragment_customer_details, container,
false);
// get the reference of views
customerCode=(EditText)v.findViewById(R.id.CustomerCode);
fullName=(EditText)v.findViewById(R.id.FullName);
addressLine1=(EditText)v.findViewById(R.id.AddressLine1);
addressLine2=(EditText)v.findViewById(R.id.AddressLine2);
mobileNo=(EditText)v.findViewById(R.id.MobileNo);
emailId=(EditText)v.findViewById(R.id.EmailId);
customerType=(EditText)v.findViewById(R.id.CustomerType);
submit=(Button)v.findViewById(R.id.Submit);
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String abc = customerCode.getText().toString();
Toast.makeText(getActivity(), abc ,Toast.LENGTH_SHORT).show();
// database();
}
});
return v;
}
I have two fragments in my mainactivity, from the first one, the user clicks on a button and send through my listener a char to the second fragment, depends of that char a textview in the second fragment must print a text. But in my metho onActivityCreated my textview is always null.
This is my code:
FragmentOne
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
btnChefcito = (Button)getView().findViewById(R.id.btnChefcito);
btnChefcita = (Button)getView().findViewById(R.id.btnChefcita);
btnChefcito.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
welcomeListener.elegirSexo(sexo);
replaceFragment();
}
});
btnChefcita.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
sexo="f";
welcomeListener.elegirSexo(sexo);
replaceFragment();
}
});
}
This is my second fragment
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
tviBienvenida = (TextView)getView().findViewById(R.id.tviBienvenida);
}
public void getSex(String sex){
if(sex.equals("m")){
tviBienvenida.setText(bienvenido);
}else if(sex.equals("f")){
tviBienvenida.setText(bienvenida);
}
}
Instead of doing in onActivityCreated Do This in onCreateView:
private static View viewHolder;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
viewHolder = inflater.inflate(R.layout.YourFragmentLayout, container, false);
btnChefcito = (Button) viewHolder.findViewById(R.id.YourButtonId);
btnChefcito.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
welcomeListener.elegirSexo(sexo);
replaceFragment();
}
});
return viewHolder;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.your_fragment_id, null, false);
btnChefcito = (Button)view.findViewById(R.id.btnChefcito);
btnChefcita = (Button)view.findViewById(R.id.btnChefcita);
btnChefcito.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
welcomeListener.elegirSexo(sexo);
replaceFragment();
}
});
btnChefcita.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
sexo="f";
welcomeListener.elegirSexo(sexo);
replaceFragment();
}
});
return view;
}
the problem is public void onActivityCreated(Bundle savedInstanceState) not create any view in fragment so replace all code in this method
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
sorry for my English.
On Android you have to declare a global variable.
tviBienvenida in you class, and on create view
tviBienvenida = (TextView)getView().findViewById(R.id.tviBienvenida);
The variable tviBienvenida will always have the value, and any change in tviBienvenida will also be refected to your textview.
Implement view in onCreateView method and repleace your stuff there, for example:
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.your_layout, container, false);
TextView textView = view.findViewById(R.id.yourTextView);
//your code
return view;
}
My complete code is given here. But not showing the Activity.
Showing null pointer Exception when adding clickListener().
How Can i Access the button inflated using fragment
//Cant add complete code. Showing add more details.//
public class Activity extends Activity{
private static final String KEY_SUCCESS="success";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
FragmentManager fragmentManager=getFragmentManager();
FragmentTransaction transaction=fragmentManager.beginTransaction();
Fragment fragment=new PlaceholderFragment();
transaction.add(R.id.container,fragment);
transaction.addToBackStack("welcome");
transaction.commit();
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
Button loginButton;
private String userNameString;
private String passwordString;
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView;
rootView = inflater.inflate(R.layout.fragment_welcome, container, false);
try{
loginButton= (Button) rootView.findViewById(R.id.LoginFormButton);
}catch (NullPointerException e){
e.printStackTrace();
}
loginButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent logIntent = new Intent(getActivity(), BearerLoggedActivity.class);
startActivity(logIntent);
}
});
return rootView;
}
}
}
fragment.getView().findViewById(id)
That should do it, but I usually prefer to have all my listeners and business logic in the Fragment itself keeping the Activity as minimal possible. A small demo :
public class FirstFragment extends Fragment {
Button btn;
private OnFragmentClickListener listener;
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.first_fragment,
container, false);
//Do stuff to the fragment view in here if you want
btn = (Button) v.findViewById(R.id.breplace);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent mainIntent = new Intent(getActivity(),
MyActivity.class);
startActivity(mainIntent);
}
});
return v;
}
Hope this helps !
If I understand correctly, what you are looking for is:
fragment.getView().findViewById(id);
Please add this on your Fragment class
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.image_layout, container, false);
//ImageView imageView = (ImageView) view.findViewById(R.id.imageView1);
//imageView.setImageResource(imageResourceId);
//imageView.setBackgroundResource(imageResourceId);
Button button = (Button) view.findViewById(R.id.btn1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent mainIntent = new Intent(getActivity(),
NextActivity.class);
startActivity(mainIntent);
}
});
return view;
}
Your problem will be solved
public class MainFragment extends Fragment {
public static final String TAG = MainFragment.class.getSimpleName();
private static final String ABOUT_SCHEME = "settings";
private static final String ABOUT_AUTHORITY = "main";
public static final Uri ABOUT_URI = new Uri.Builder().scheme(ABOUT_SCHEME).authority(ABOUT_AUTHORITY).build();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.mainbutton, container, false);
return v;
}
}
According to below link:
How to handle button clicks using the XML onClick within Fragments
public class StartFragment extends Fragment implements OnClickListener{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_start, container, false);
Button b = (Button) v.findViewById(R.id.StartButton);
b.setOnClickListener(this);
return v;
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.StartButton:
/* ... */
break;
}
}
}
source doesn't work too.
#J.Romero is right. Try this code, I change the onClick method and add some debug log.
public class StartFragment extends Fragment implements OnClickListener {
private static final LOG_TAG = "com.example.activity"
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_start, container, false);
if (v != null) {
Button mButton = (Button) v.findViewById(R.id.StartButton);
Log.d(TAG, "View is not null");
if (mButton != null) {
b.setOnClickListener(this);
Log.d(TAG, "mButton is not null");
}
}
return v;
}
#Override
public void onClick(View v) {
if (v == mButton) {
//do something
}
}
}
you can NOT access the UI element in onCreateView method - EVER
use onActivityCreated method , thats tell the fragment the activity is fully created and ready to interact
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
Button b = (Button) v.findViewById(R.id.StartButton);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
Try this way:
Button b = (Button) v.findViewById(R.id.StartButton);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
/*Your code*/
}
});
I am having am mainActivity which consists of 3 fragment activity in a view pager .each fragment consists of edit texts .How to get the value of the edit text when swipe fragment horizontally ? I am trying to do like this.below code
public class MainActivity extends FragmentActivity {
int value = 0;
Context context;
String a = "";
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main);
// Set up the action bar.
//final ActionBar actionBar = getActionBar();
// actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mAddButtonB = (Button) findViewById(R.id.addnewB);
mAddSearchV = findViewById(R.id.addnewSearch);
mAddButtonB.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
mAddSearchV.setVisibility(View.GONE);
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.customviewpager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
});
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
PageZero p0;
PageOne p1;
PageTwo p2;
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
p0 = new PageZero();
p1 = new PageOne();
p2 = new PageTwo();
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return p0;
case 1:
return p1;
case 2:
return p2;
}
return null;
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
}
// PageZero = (Fragment1)getFragmentManager().findFragmentByTag("frag1");
public class PageZero extends Fragment {
private EditText name;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentname, container,
false);
name=(EditText)view.findViewById(R.id.nameTV);
name.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
a=name.getText().toString().trim();
Toast.makeText(getApplicationContext(),a,Toast.LENGTH_SHORT).show();
}
});/*(new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
a=name.getText().toString().trim();
Toast.makeText(getApplicationContext(), a,Toast.LENGTH_SHORT).show();
return false;
}
});*/
return view;
}
}
public class PageOne extends Fragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentaddress, container,
false);
return view;
}
}
public class PageTwo extends Fragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentmobno, container,
false);
return view;
}
}
}
when i try to access the eddittext inside pageZero class like below
name=(EditText)view.findViewById(R.id.nameTV);
a=name.getText().toString().trim();
i am getting null value.help me out..Thanks in advance.
Change the pagezero class oncreateview code like this .....
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view =getActivity().getLayoutInflater().inflate(R.layout.componentname,null);
name=(EditText)view.findViewById(R.id.nameTV);
name.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
a=name.getText().toString().trim();
Toast.makeText(getApplicationContext(),a,Toast.LENGTH_SHORT).show();
}
return view;
});
Return the view friend and then use default layout inflater...
At the time you click the edittext field, is there any content? Maybe you should get the text in the lost focus event of the edittext field. Thus you can enter some text first...
Example:
name.setOnFocusChangeListener(new OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus == false){
//get text from edittext field...
}
}
});
The way you try to get the text looks right to me. At least I do it the same way.
In the PagerAdapter's 'getItem' Method you should instantiate your fragments directly:
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new PageZero();
case 1:
return new PageOne();
case 2:
return new PageTwo();
}
return null;
}
The Viewpager only calls getItem if it wants to create a new item. Unfortunatly they called the method getItem and not createItem which would be more obvious.
Get your EditText inside onClick block...
This mean change the code from:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentname, container, false);
name=(EditText)view.findViewById(R.id.nameTV);
name.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
a=name.getText().toString().trim();
Toast.makeText(getApplicationContext(),a,Toast.LENGTH_SHORT).show();
}
});
return view;
}
To:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentname, container, false);
name.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// GET EDIT TEXT HEAR:
EditText name=(EditText)view.findViewById(R.id.nameTV);
a=name.getText().toString().trim();
Toast.makeText(getApplicationContext(),a,Toast.LENGTH_SHORT).show();
}
});
return view;
}
To create a 3 different fragments with view pager you should:
1)Create FragmentActivity with view pager and view pager adapter.
public class FragmentActivity extends FragmentActivity
{
private FragmentAdapter adapter;
private ViewPager pager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fragment);
adapter = new FragmentAdapter(getSupportFragmentManager());
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
}
2)Create 3 Fragments with static instance
public final class Fragment1 extends Fragment
{
public static Fragment1 newInstance() {
return new Fragment1();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
LinearLayout layout = new LinearLayout(getActivity());
// your fragment xml view
return view;
}
}
3)Fill view pager adapter with it;
public class FragmentAdapter extends FragmentPagerAdapter
{
public InstallFragmentAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return Fragment1.newInstance();
case 1:
return Fragment2.newInstance();
case 2:
return Fragment3.newInstance();
}
return null;
}
}
public class PageZero extends Fragment {
public static EditText name; //change this to public static
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentname, container,
false);
name = (EditText)view.findViewById(R.id.nameTV);
name.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
}
});
return view;
}
}
Then, you can access the public static EditText name (after the view for it has been generated of course) from another fragment like this.
public class PageOne extends Fragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.componentaddress, container,
false);
EditText page_one_text = PageZero.name; //you can get that variable in any fragment now, but using the class name of that fragment to access it
return view;
}
}
Cheers. Please mark this as the correct answer if it helps you. You have quite a bit of answers here
I tried below code. Working for me
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_main_explore, container, false);
ed1 = (EditText)v.findViewById(R.id.editTextTemp);
if( ed1 == null )
{
Toast.makeText(getActivity(), "ERROR UNABLE TO GET EDIT", Toast.LENGTH_LONG).show();
}
// Inflate the layout for this fragment
//return inflater.inflate(R.layout.fragment_main_explore, container, false);
return v;
}