Develop Reference

Fragment button not opening new activity

I've incorporated a horizontal slide navigation component (which required making the class extend Fragment). The slide part works fine. Here i have respective onClick() buttons which open a new activity. If I add a button into one of those activities I'm not finding a way to have the displayed activity subsequently refresh. I would think inflating an activity from a button within a fragment would be possible but anything I try stops the emulator.
There's not much to my code so far, so I'm not going to clutter my question with the associated layout part. Any help is certainly appreciated.
Fragment #1’s Java code
public class TasksFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_tasks, container, false);
Button ID = (Button) rootView.findViewById(R.id.button_create_appraisal_rpt);
ID.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AppraisalReportActivity appraisalRptAct = new AppraisalReportActivity();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.child_fragment, appraisalRptAct);
fragmentTransaction.setTransition(fragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
});
return rootView;
}
}
Fragment #1 (portion), which has the button that should initiate aa refresh of this Fragment #1 with Fragment #2
Fragment #2 that's to supersede/refresh the previous fragment when Fragment #1's button is clicked

I don't really understand what you mean. Do you want to click Button in Fragment to jump to another Activity?
If it is,I think maybe you can try use getActivity() to make Activity are working.
for example:
getActivity().startActivity(new Intent(getActivity(),Activity.class))
I hope my answer will help you

Connecting Fragments using ImageButton in Android

I'm new Android programming. Earlier I was working with activities, where i could implement onClick on an ImageButton and go to a different activity.
Now I need to do the same but using Fragments. I have a prototype with a menu that always appear on screen and can show different activities to the user. The different lactivities would be inside this container.
Now I want to place an ImageButton inside a fragment and make that the screen shows the next fragment. But I'm confused how to do it.
I have the following components:
Activity_main(java)+activity_main.xml (with menu)
Fragment1(java)+fragment1.xml(working normal)
Inside this layout I have an ImageButton and want to show Fragment2
Fragment2(java)+fragment2.xml
How should look Fragment1 to can call Fragment2?
I will be glad if the answer could be the clearest possible because I'm new on it, and maybe I could forgot an obvious step. Thanks

Simply make a method in your activity which will always change/replace fragment when you invoke it. something like
public void updateFragment(Fragment fragment){
//add fragment replacing code here
}
in your fragment, invoke it some thing like this
((YourActivity)getActivity()).updateFragment(new YourFragment());
since, it is just an idea which works fine but still you can improve the logic.

Actually, going from one fragment to another is almost similar to going from one activity to another. There are just a few extra lines of code.
First, add a new Java class named SingleFragmentActivity which would contain the following code-
public abstract class SingleFragmentActivity extends AppCompatActivity
{
protected abstract Fragment createFragment();
#LayoutRes
protected int getLayoutResId()
{
return R.layout.activity_fragment;
}
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(getLayoutResId());
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.fragment_container);
if (fragment == null)
{
fragment = createFragment();
fm.beginTransaction().add(R.id.fragment_container, fragment).commit();
}
}
}
Make your activities in the following format-
public class SomeActivity extends SingleFragmentActivity
{
#Override
protected Fragment createFragment()
{
return SomeFragment.newInstance();
}
}
And your fragments like this-
public class SomeFragment extends Fragment
{
public static SomeFragment newInstance()
{
return new SomeFragment();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View v = inflater.inflate(R.layout.fragment_some, container, false);
return v;
}
}
After this everything has the same code as you have for activities except for one small detail which is your onCreateView(LayoutInflater, ViewGroup, Bundle) class. This is how you would write it-
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View v = inflater.inflate(R.layout.fragment_some, container, false);
mTextView = (TextView)v.findViewById(R.id.some_text);
mButton = (Button)v.findViewById(R.id.some_button);
mTextView.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
check();
}
});
return v;
}
And that is it!

Hi i hope you are already aware about the fragments and their uses but still here is a brief. They are child to an activity and an activity can have more than one fragment so you can update your layout without changing activity just by changing fragments.
You can found more on fragment here : https://developer.android.com/training/basics/fragments/index.html
Back to the original problem, supposed you are in MainActivity.java and you want to load fragment in it, so you do this to load fragment first time.
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame, new Fragment1);
transaction.addToBackStack(null);
transaction.commit();
You will need this method to change fragment from another fragment, so add this in your MainActivity
public void changeFragment(Fragment fragment){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame, new Fragment1);
transaction.addToBackStack(null);
transaction.commit();
}
Now from a button click in this fragment
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
((MainActivity)getActivity()).changeFragment(new Fragment2);
}
});
Hope it will help!

How to use Intent method in CustomAdapter to Project_Fragment [duplicate]

I want to launch a new fragment to view some data. Currently, I have a main activity that has a bunch of actionbar tabs, each of which is a fragment. So, within a tab fragment, I have a button, chartsButton. I have my onclicklistener all set for it, and here's the onClick method:
public OnClickListener chartsListener = new OnClickListener() {
#Override
public void onClick(View v) {
Intent chartFragment = new Intent();
startActivity(chartFragment);
}
};
Now, as I said, this listener is within a class that extends Fragment. So, I want to launch a new fragment (chartsFragment) via the intent to replace the whole screen. When the user clicks back, it'll bring them back to the tabs and main activity. Here's my chart fragment:
public class chartsFragment extends Fragment {
public View onCreateView() {
//LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState
LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
return (inflater.inflate(R.layout.chartfragment, null));
}
}
The current error I am dealing with: "android.content.ActivityNotFoundException: No Activity found to handle Intent { }". That's fine, I understand that I could use getActivity().startActivity(chartsFragment), but that results in the same error. I suppose what I am looking for here, is how do I launch an intent from within a fragment that results in opening a new fragment?

The answer to your problem is easy: replace the current Fragment with the new Fragment and push transaction onto the backstack. This preserves back button behaviour...
Creating a new Activity really defeats the whole purpose to use fragments anyway...very counter productive.
#Override
public void onClick(View v) {
// Create new fragment and transaction
Fragment newFragment = new chartsFragment();
// consider using Java coding conventions (upper first char class names!!!)
FragmentTransaction transaction = getFragmentManager().beginTransaction();
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();
}
http://developer.android.com/guide/components/fragments.html#Transactions

You cannot open new fragments. Fragments need to be always hosted by an activity. If the fragment is in the same activity (eg tabs) then the back key navigation is going to be tricky I am assuming that you want to open a new screen with that fragment.
So you would simply create a new activity and put the new fragment in there. That activity would then react to the intent either explicitly via the activity class or implicitly via intent filters.

Try this it may help you:
public void ButtonClick(View view) {
Fragment mFragment = new YourNextFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, mFragment).commit();
}

Try this it may help you:
private void changeFragment(Fragment targetFragment){
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.main_fragment, targetFragment, "fragment")
.setTransitionStyle(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
.commit();
}

try this:
in SecondActivity:
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(this, FirstActivity.class);
intent.putExtra("openFragment", "YourFragment");
startActivity(intent);
}
});
In the FisrtActivity that contains the fragment:
if (getIntent().getStringExtra("openFragment").equals("YourFragment")){
getSupportFragmentManager().beginTransaction().replace(R.id.containerView, new YourFragment()).commit();
}

Opening a fragment in another fragment

I have a view pager that has 3 fragments inside.
However, the first fragment has a listview.
I want to open a new fragment when I click on a ListView item.
I was able to make it work succefully with this code:
Fragment FullBrand = new FullBrand();
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.framebrands, FullBrand);
Bundle bundle = new Bundle();
FullBrand.setArguments(bundle);
ft.addToBackStack(null);
ft.commit();
However, when the new fragment launches, the viewpager is still there!
What to do? how can I get rid off them??
Thanks!

Seems like you're trying to replace one fragment inside the view pager.
If you want to replace the view pager fragment (with it's 3 child) and to show other fragment you need to call the transaction in the FragmentActivity and replace it in the current container.
Add callback to the activity and replace the whole container in the activity when listview item clicked.
Example to add listener
in view pager fragment, declare your interface:
public interface OnViewPagerClickListener {
public void onBlaBla(Object arg);
}
in your Fragment Activity:
public class MyFragmentActivity implement ViewPagerFragment.OnViewPagerClickListener
in your view pager fragment override onAttach & declare interface member
private OnViewPagerClickListener mCallback;
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
mCallback =(OnViewPagerClickListener) activity **try catch this code**
}
And wherever you want call the mCallback.onBlaBla(...)
and do the rest in the activity....
This is very summarize lesson for interfaces :)
More info about interface and callback here
Good luck.

You shouldn't try to remove the ViewPager instead better you can show the new Fragment (i.e FullBrand) in a DialogFragment . so If you click back it will bring you to old ViewPager only, it won't exit the app
To show a Dialog Fragment with FullScreen try the following code:
public class NewFragment extends DialogFragment {
private Dialog dialog;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.new_fragment_xml_here, container,
false);
return view;
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
dialog = new Dialog(getActivity(),
android.R.style.Theme_Black_NoTitleBar);
dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
return dialog;
}
}
Then call this NewFragment from your ListView item click to show this as NewScreen which will look like a new screen:
NewFragment fragment = new NewFragment();
fragment.show(fragmentManager, "NewFragment");
I hope it would help you.

How to replace a Fragment on button click of that fragment?

I have an activity containing multiple fragments. Activity initially have fragment and in it have two buttons. Upon clicking this button I have to replace the fragment by new fragment. Each fragment has various widgets and replace the current fragment as various events.
This is my problem. How can I achieve this?
Suggest me ideas.

you can replace fragment by FragmentTransaction.
Here you go.
Make an interface.
public interface FragmentChangeListener
{
public void replaceFragment(Fragment fragment);
}
implements your Fragment holding activity with this interface.
public class HomeScreen extends FragmentActivity implements
FragmentChangeListener {
#Override
public void replaceFragment(Fragment fragment) {
FragmentManager fragmentManager = getSupportFragmentManager();;
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(mContainerId, fragment, fragment.toString());
fragmentTransaction.addToBackStack(fragment.toString());
fragmentTransaction.commit();
}
}
Call this method from Fragments like this.
//In your fragment.
public void showOtherFragment()
{
Fragment fr=new NewDisplayingFragment();
FragmentChangeListener fc=(FragmentChangeListener)getActivity();
fc.replaceFragment(fr);
}
Hope this will work!
NOTE: mContainerId is id of the view who is holding the fragments inside.
You should override Fragment's onString() method as well.

Well even I am learning android...
I solved same problem recently, "How to Change Fragment On button's click event".
buttonName.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FragmentTransaction fragmentTransaction = getActivity()
.getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame1, new Homefragment());
fragmentTransaction.commit();
}
});
Here frame1 is id of FrameLayout which have define in my DrawerLayer's XML.
So now whenever I want fragment transaction I use this code. Each time it will replace frame1 instated of your last fragment.
FragmentTransaction fragmentTransaction = getActivity()
.getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame1, new newfragment());
fragmentTransaction.commit()
Hope this will help..

You can use the following to replace a fragment on button click of that fragment:
getFragmentManager().beginTransaction().replace(R.id.main_content, new insertFragmentNameHere()).addToBackStack(null).commit();

Define an interface and call it IChangeListener (or something like that) and define a method inside which will do the work (ex, changeFragment()) (or call another method which will do the work) for changing the fragment).
Make your activity implement the interface, or make an anonymous class within the activity implement it.
Make a paramerized constructor of your fragment, which accepts a IChangeListener parameter.
When initializing the fragment, pass your IChangeListener implementation (the anonymous class or the activity, implementing it)
Make the onClick listener of the button call the changing method of the IChangeListener.

From the future 2017 and after, there exists different libraries that triggers Events using Bus and now you can use it to tell the activity when an event is trigger in a fragment that it owns.
Refer to:
RxBus with RxJava
You can check new architectures suggested by Google
ViewModel
Don't use the approach in the accepted answer, get really ugly with more than 3 different events from fragments

you can try this code it's work fine with me , inflate the layout to view , Define the buton and on click ,
Button btn_unstable;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home,container,false);
btn_unstable = (Button)view.findViewById(R.id.btn_unstable);
btn_unstable.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.fragment_replace, new UnstableFragment()).commit();
}
});
return view;
}