I have the following fragment working in view pager:
<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/window_background"
android:id="#+id/font"
tools:context="com.cuentos.lib.cuentosmusicales.Libro">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:gravity="center"
android:id="#+id/titleBook"
android:textSize="25sp"
android:textColor="#2211CC"
android:text="#string/hello_blank_fragment" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/titleBook"
android:id="#+id/textBook"
android:textSize="15sp"
android:textColor="#44BB11"
android:text="#string/hello_blank_fragment" />
</RelativeLayout>
and i want to modify textview values from fragment class
public class Libro extends Fragment {
String titleLibro;
String text;
TextView title, text1;
public Libro() {}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_libro, container, false);
title = (TextView) view.findViewById(R.id.titleBook);
text1 = (TextView) view.findViewById(R.id.textBook);
title.setText("hi friends");
text1.setText("text");
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_libro, container, false);
}
}
So, I detect im not able to change data because there is no change, so how I can instanciate textview in fragment?
First, you're inflating your view two times. There's one on the first line of the onCreateView, which is the one that you modify the TextViews, but in the return statement you create and return another, you're not returning the one you modified, but a new one instead, so the view that will be presented in the UI is the not modified.
Also, you're calling the findViewById in the wrong lifecycle stage. Notice that onCreateView returns the view that will be present in your fragment. It's not possible to retrieve a view component like yours TextViews that way, because the view itself doesn't exists yet.
The right method to modify your view components is in the onViewCreated:
#Override
public void onViewCreated(View view, Bundle savedInstanceState)
{
title = (TextView) view.findViewById(R.id.titleBook);
text1 = (TextView) view.findViewById(R.id.textBook);
title.setText("hi friends");
text1.setText(text);
}
Try setting the text when overriding your Fragments onActivityCreated or onResume methods.
Related
I have created a fragment and want to start a dialogue on a button click on which i would display n numbers of texts distributed vertically using Linear layout vertical orientation. To begin with i have created a textview which i am populating dynamically. But i get a null pointer exception saying the any of the layout i referenced here points to NULL.
View view,tempView;
TextView myName, myPhNo, myEmail, myDob;
ImageButton selectRingTone;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
view = inflater.inflate(R.layout.fragment_profile, container, false);
tempView = inflater.inflate(R.layout.fragment_selectsong, container, false);
myName = (TextView)view.findViewById(R.id.username);
myPhNo = (TextView)view.findViewById(R.id.userPhNo);
myEmail = (TextView)view.findViewById(R.id.useremailId);
myDob = (TextView)view.findViewById(R.id.userdob);
selectRingTone = (ImageButton)view.findViewById(R.id.selectRingTone);
setUserProfileData();
//setUserTextStatus();
//setUserAudioStatus();
selectRingTone.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
chooseAndSetRingTone();
}
});
return view;
}
private void chooseAndSetRingTone(){
final Dialog fbDialogue = new Dialog(view.getContext(), android.R.style.Theme_Black);
fbDialogue.getWindow().setTitle("Select your audio status song");
fbDialogue.getWindow().setBackgroundDrawable(new ColorDrawable(Color.argb(100, 0, 0, 0)));
fbDialogue.setContentView(R.layout.fragment_selectsong);
getSongsAndFillDialogue();
fbDialogue.setCancelable(true);
fbDialogue.show();
}
private void getSongsAndFillDialogue(){
LayoutInflater inflater = (LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout container = (LinearLayout) tempView.findViewById(R.id.eachRingToneSong);
TextView tv = new TextView(tempView.getContext());
tv.setText("Hi hello");
Button b = new Button(tempView.getContext());
b.setText("abcde");
container.addView(tv);
container.addView(b);
}
XML Code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainLyt"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ScrollView
android:id="#+id/scrollCotainerForRingToneSongs"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/eachRingToneSong"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<!--<TextView
android:id="#+id/song1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="abcde"
/>-->
</LinearLayout>
</ScrollView>
</RelativeLayout>
you are creating View for your Dialog in onCreateView method:
tempView = inflater.inflate(R.layout.fragment_selectsong, container, false);
and fulfilling it using getSongsAndFillDialogue method, but you are setting for your Dialog another new instance passing only resource id:
fbDialogue.setContentView(R.layout.fragment_selectsong);
when you are passing just id then Dialog is inflating this layout by itself (just like you). So there are two layouts created, one in Activity - fulfilled, and one created "automatically" by setContentView method, but not touched at all by your methods (so it stays empty)
instead of passing resource id pass already prepared tempView, like below:
fbDialogue.setContentView(tempView);
I have a RelativeLayout containing a TextView.
I want to append a new TextView under the existing TextView programmatically in the onCreateView method, but what happens when I try to do so, is that the TextView I add programmatically gets overlapped with the existing one.
More details below:
public static class ContentTours extends Fragment{
public static String TOUR_NAME= "tour_info";
View view = getView();
TextView contentTour;RelativeLayout toursView;
public ContentTours(){
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.tours_view, container, false);
toursView = (RelativeLayout) view.findViewById(R.id.rel_layout);
contentTour = (TextView) view.findViewById(R.id.tours);
contentTour.setText(getArguments().getString("2"));
ViewGroup.LayoutParams stt = contentTour.getLayoutParams();
TextView nt = new TextView(getActivity().getBaseContext());
nt.setText(getArguments().getString("1"));
toursView.addView(nt, new ViewGroup.MarginLayoutParams(stt));
return view;
}
}
I have a RelativeLayout containing the TextView. tours_view.xml:
<RelativeLayout android:id="#+id/rel_layout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:layout_marginBottom="16dp">
<TextView android:id="#+id/tours" android:clickable="true"
android:background="?android:selectableItemBackground"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="32dp"
android:text="Lorem ipsum"/>
</RelativeLayout>
the reason why I have a Fragment class is that tours_view.xml is a layout that I am applying to another FrameLayout.
By default in a RelativeLayout, the views overlap if there is no relation defined.
What you should do for your requirement is create a relation(rule) between the TextView to be added and the already present TextView.
RelativeLayout.LayoutParams stt = (RelativeLayout.LayoutParams) contentTour.getLayoutParams();
Now, add a rule
stt.addRule(RelativeLayout.BELOW, R.id.tours);
RelativeLayout.BELOW, so that the new TextView is below your old one. Hope this helps.
Hi there (and thanks in advance),
I have an application with a Google Play Store-like layout (using PagerTabStrip with 5 sub fragments). In some of those fragments I will need to display a little info regarding the last time the data was updated.
I immediately thought of creating a fragment (LastUpdatedFragment) which I would then add (nest) to the fragments I needed. At first, and since the last updated date was supposed to be the same for every screen, things were working (I simply added the fragment in the xml of the parent Fragments I needed and inside onCreateView I would put the date in the TextView), but after some changes I now need to send a specific date for each one of these LastUpdatedFragment instances.
I came up with one way - creating new custom attributes for my Fragment and then I would set the date I wanted. After some reading I stumbled across a easier way (Fragments within Fragments - dinamically adding the fragment using FragmentManager) - I simply needed the parent Fragment to handle the input parameters and pass it to the child fragment.
The problem is that, although I get no errors I also get no child fragment, it just does not display. I would be grateful if you could guide me in the right direction.
ScoreBoardFragment.java -> Parent Fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_scoreboard, container,
false);
for (int i = 0; i < tvCount; i++) {
tvName = "f_scoreboard_header_tv" + String.valueOf(i);
resID = getResources().getIdentifier(tvName, "id",
_activity.getPackageName());
header = (TextView) rootView.findViewById(resID);
header.setTypeface(MyGlobalConfig.getInstance().getHeadersFont());
}
FragmentManager childFragMan = getChildFragmentManager();
FragmentTransaction childFragTrans = childFragMan.beginTransaction();
LastUpdatedFragment fragB = new LastUpdatedFragment();
childFragTrans.add(R.id.FRAGMENT_PLACEHOLDER, fragB);
childFragTrans.addToBackStack("B");
childFragTrans.commit();
return rootView;
}
fragment_scoreboard.xml (simplified but displaying everything else)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/FRAGMENT_PLACEHOLDER"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
style="#style/ListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/f_scoreboard_header_tv0"
style="#style/ListViewRowHeader"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#" />
</LinearLayout>
<ListView
android:id="#+id/f_scoreboard_lvbody"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true" >
</ListView>
</LinearLayout>
LastUpdatedFragment.java -> Child Fragment
public class LastUpdatedFragment extends Fragment{
private View rootView;
private TextView tv;
private Context ctx;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(
getActivity()));
this.ctx = getActivity().getApplicationContext();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_date, container,
false);
tv = (TextView) rootView.findViewById(R.id.f_date_tv);
tv.setTypeface(MyGlobalConfig.getInstance().getBodyFont());
tv.setText(getString(R.string.lastupdated) + ": " + Util.getLastUpdated(ctx));
return rootView;
}
}
fragment_date.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/f_date_tv"
style="#style/LastUpdatedTV"
android:layout_width="match_parent"
android:text="Data de última actualização: 27/12/2014 21:30" />
</LinearLayout>
Try to use FrameLayout instead of LinearLayout as Placeholder.
I am trying to make a particular nested FrameLayout visible dynamically. However, i am getting NullPointerException when i try to access the view outside of my fragment's onCreateView() method. So here is my implementation.
private View myView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View fragmentView = inflater.inflate(R.layout.listView, container, false);
this.myView = fragmentView;
...
return fragmentView;
}
#Override
public void apiCompleted(ApiResult apiResult, HttpRequest httpRequest) {
if(myLocationManager.hasLocation()){
FrameLayout flayout = (FrameLayout) myView.findViewById(R.id.ldrawlayout);
flayout.setVisibility(View.VISIBLE);
}
}
listView.xml
<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/background_gray"
tools:context=".fragment.MallListFragment"
android:orientation="vertical">
<ListView
android:id="#+id/lv_malls"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
rowlist.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/row_mallx"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
android:paddingBottom="7dp">
<FrameLayout
android:id="#+id/ldrawlayout"
>
...
</FrameLayout>
</RelativeLayout>
LOGCAT (onCreateView method is called first)
01-15 18:40:16.905 7633-7633/? V/onCreateView METHOD CALLED﹕ onCreateView
01-15 18:40:17.280 7633-7633/? V/APICOMPLETED METHOD CALLED﹕ apiCompleted
Ok, I see the problem. You want to access the row-layout, but your listview has multiple versions of this layout, that mean you can not access the row layout from the activity, you have to do it in your listadapter or you give your single rows in the listadapter an unique id such as row.setId(row.getId + positionOfRow)
LayoutInflater Inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = Inflater.inflate(R.layout.row_mallx, null);
FrameLayout flayout = (FrameLayout) view .findViewById(R.id.ldrawlayout);
flayout.setVisibility(View.VISIBLE);
try this code in on apiCompleted
Are your sure that the onCreateView() method is called before the apiCompleted() method.
If yes, you should be able to access the view any where in your code as long as you hold the reference to it.
You can add some logs to see the order that the functions get called
I have tried everything I can possibly think of, I have tried many solutions in Stack as well. None seem to resolve my issue. I am trying to pass a string that I passed from an earlier intent (parsed JSON data). Everytime I call set text I get a Null Pointer Exception, I have tried using a method to set the text as well as just setting it. Any assistance would be greatly appreciated.
This is the fragment I am trying to update.
public class HomeFragment extends Fragment{
TextView tv;
public HomeFragment(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
LayoutInflater lf = getActivity().getLayoutInflater();
View rootView = lf.inflate(R.layout.fragment_home, container, false);
tv = (TextView) rootView.findViewById(R.id.accountName);
tv.setText("test");
return rootView;
}
}
I just put a regular string in to test. Here is the XML.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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="Large Text"
android:id="#+id/lblCompany"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="71dp" />
</RelativeLayout>
Thanks In advance for absolutely any help.
This is the id set on your TextView in xml:
android:id="#+id/lblCompany"
This is the id you are searching for in onCreateView:
tv = (TextView) rootView.findViewById(R.id.accountName);
The ids need to match for you to update the text in that particular TextView. Try
tv = (TextView) rootView.findViewById(R.id.lblCompany);
instead.