I have a FragmentActivity which sets a main layout with 3 tabs. Each tab has it's own fragment which inflates is own layout into main layout.
For example, one of the three Fragments:
public class Fragment1 extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
return inflater.inflate(R.layout.fragment1, container, false);
}
}
When I add all the fragments and connect them with tabs everything works. When I click on tab1, layout of the Fragment1 shows, when I click on Tab2, layout of the Fragment2 shows.
The problem is that when I want to change something in that inflated layout (for example execute setText to textView in fragment1 layout), I receive a NullPointerException in that line and application stops.
This doesn't work:
TextView test = (TextView) findViewById(R.id.fragmentOneText1);
test.setText("Test text!");
How to set data to inflated layout?
You have to inflate your fragment specific layout first by using LayoutInflater and map the control in your Fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View fragmentView = inflater.inflate(R.layout.R.layout.fragment1, container, false);
TextView text = (TextView) fragmentView.findViewById(R.id.fragmentOneText1);
mTextNoResult=(TextView)fragmentView.findViewById(R.id.text_noresult);
return fragmentView;
}
Related
I am developing an application where i need to call two fragments on an activity replacing another fragment,one of the fragment will contain a Form and another fragment will contain another Form ,i don't have any idea how to do this,so any suggestion will be cordially appreciated,thanks in advance....
I want to replace Form on Click button. by R&D i come to know at this point i need to use to fragment with two layout each layout will contain Forms.
Main Activity.
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
Fragment 1.
public class Fragment1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment1, container, false);
}
Fragment 2.
public class Fragment2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment2, container, false);
}
}
You can try like this
FragmentTransaction ft=getSupportFragmentManager().beginTransaction();
ft.add(Home.newInstance(),"First");
ft.add(Second.newInstance(),"Second");
ft.commit();
So here you are added multiple fragment into the stack
If you are trying to replace Fragment1 with Fragment2, you replace the fragment.
https://developer.android.com/reference/android/support/v4/app/FragmentTransaction.html#replace(int,%20android.support.v4.app.Fragment)
I have an HomeAcivity with 4 fragments. 3 of the fragments have no Toolbar of their own and I am showing the Activity's Toolbar in them. However, the 4th Fragment have Toolbar of its own.
Currently I am seeing 2 Toolbars in 4th Fragment, one its own and other that of Activity.How can I hide the Activity's Toolbar and just show its own Toolbar?
Please note that I don't want to update the content of Activity's Toolbar instead of showing new Toolbar inside Fragment. I want to show Fragments own Toolbar and hide that of Activity.
Please help me out.
You can hide activity's toolbar from your 4th fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_view, container, false);
((ToolbarView)getActivity().findViewById(R.id.toolbarView)).setVisibility(View.GONE);
return rootView;
}
and show activity's toolbar from other three fragments
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_view, container, false);
((ToolbarView)getActivity().findViewById(R.id.toolbarView)).setVisibility(View.VISIBLE);
return rootView;
}
I’m doing a navigation drawer in my android app. On my onNavigationDrawerItemSelected function i try on item select to change the current fragment into a new one. The problem is that when I change the current fragment its take the initial status of it. maybe because i'm doing this way
fragmentManager.beginTransaction()
.replace(R.id.cont, new SessionsFragement())
.commit();
I declare a new instance of my fragment and i think it’s normal, its display me the initial status of the thing. On my fragment i've try to set a textView to see if i will say it when i call the fragement from tha navigation drawer but it's not the case.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_spot, container, false);
tata = (TextView) v.findViewById(R.id.tata);
tata.setText("karim");
return inflater.inflate(R.layout.fragment_spot, container, false);
}
So please can anyone help me to fix this.
In the snippet you posted you are inflating again the view. You should return the one you modified
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_spot, container, false);
tata = (TextView) v.findViewById(R.id.tata);
tata.setText("karim");
return v;
}
Ok i have a TabActivity with a FragmentActivity in each tab. In one of those tabs i have a root Fragment which contains a ScrollView with multiples HorizontalScrollView like the picture:
In each HorizontalScrollView i add dinamically a few of objects inflated like this:
To get the effect of Gallery, well the main problem is when I click in each item to replace for another fragment, i add this fragment to backstack, BUT when i press back to return to this fragment all my textview are contains the same text... It's so very strange, and i dont know WHY!? Some ideas?
I put the onCreateView function that i'm using:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
{
if (view == null) {
this.view = inflater.inflate(R.layout.activity_home, container, false);
} else {
((ViewGroup) view.getParent()).removeView(view);
}
return this.view;
}
I'm trying to change the layout of a fragment during runtime under a particular condition.
The initial layout in inflated within the onCreateView():
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.cancel_video, null);
}
Then sometime later within the fragment code I would like to replace the initial layout with some other layout.
I've tried a few things so far; this is the latest that I have:
private void Something(){
if(checkLicenseStatus(licenseStatus, statusMessage)){
View vv = View.inflate(getActivity(), R.layout.play_video, null);
//more code
}
}
How can I accomplish this?
You cannot replace the fragment's layout once it is inflated. If you need conditional layouts, then you either have to redesign your layout and break it down into even smaller elemens like Fragments. Alternatively you can group all the layout elements into sub containers (like LinearLayout), then wrap them all in RelativeLayout, position them so they overlay each other and then toggle the visibility of these LinearLayouts with setVisibility() when and as needed.
Yes, I have done this in following way. When I need to set a new layout(xml), the following code snippet should be executed.
private View mainView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup containerObject, Bundle savedInstanceState){
super.onCreateView(inflater, containerObject, savedInstanceState);
mainView = inflater.inflate(R.layout.mylayout, null);
return mainView;
}
private void setViewLayout(int id){
LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mainView = inflater.inflate(id, null);
ViewGroup rootView = (ViewGroup) getView();
rootView.removeAllViews();
rootView.addView(mainView);
}
Whenever I need to change the layout I just call the following method
setViewLayout(R.id.new_layout);
Use a FragmentTransaction through the FragmentManger
FragmentManager fm = getFragmentManager();
if (fm != null) {
// Perform the FragmentTransaction to load in the list tab content.
// Using FragmentTransaction#replace will destroy any Fragments
// currently inside R.id.fragment_content and add the new Fragment
// in its place.
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fragment_content, new YourFragment());
ft.commit();
}
The code for the class YourFragment is just a LayoutInflater so that it returns a view
public class YourFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.your_fragment, container, false);
return view;
}
}
I will change whole layout. You can change only a specific portion of your layout.
Add a root FrameLayout in your_layout.xml, it contains nothing.
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/fl_content"
android:layout_width="match_parent"
android:layout_height="match_parent" />
Set your content in the java code.
ViewGroup flContent = findViewById(R.id.fl_content);
private void setLayout(int layoutId) {
flContent.removeAllViews();
View view = getLayoutInflater().inflate(layoutId, flContent, false);
flContent.addView(view);
}
You can change layoutId free at some point.
If you have some listeners, you must set again.