Develop Reference

Where should I put logic in the Java tab layouts

I have 2 fragments each fragments has a different java logic. Where should i put the java logic? if i did put it in the fragments,then error message displays :
cannot resolve method findViewById, Cannont resolve method getApplicationContext

it appear that you did not inflate the view correctly, change your code to be something like this :
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.your_fragment, container, false);
mButton = (Button) view.findViewById(R.id.mButton );
list_content = (ListView) view.findViewById(R.id.list_content);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
return view;
}
and you should use 'getActivity()' method for context not 'This' .

You can find other view's Id's in your fragment like this.
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.your_layout,container,false);
tabLayout = (TabLayout)view.findViewById(R.id.tabs);
return view;
}

When you inflate the view on the oncreateview make a view field like this :
View view = inflater.inflate(R.layout..., container, false);
and return with this view.
After that with this variable you can reach the findViewById, like
view.findViewById
Instead of getApplicationContext you can use getContext in fragment.
Good luck.

getting a view using getResources()

I want to set text of a TextView that is inside a layout file,
I tried setContentView() but it isnt working since i am using fragments.
I tried using getResources().getLayout(R.layout.abc);
It returns null

I tried setContentView() but it isnt working since i am using
fragments
That's wrong. You have to override onCreateView and inflate and return the layout you want to show, and you can use onCreateView, and use its first parameter, View view, to call findViewById and access the widgets in your layout. You can read more here and here

inside fragment you can set view inside function onCreateView(), use below code
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle b) {
View view = (LinearLayout) inflater.inflate(R.layout.my_layout, container, false);
return view;
}
here my_layout should be the name of layout file,
now you can get view of it inside function onviewcreated()
public void onViewCreated(View view, Bundle savedInstanceState){
// here you can get your textview and set its value
}
thumbs up, if you find my answer correct

You can inflate your layout like this:
ViewGroup group = LayouInflate.from(context).inflate(R.layout.abc,null);
TextView tv = group.findViewById(R.id.xxx);

you have to inflate the layout through the onCreateView method and then return the View.
#Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.your_layout, container, false);
TextView yourTextView = (TextView)rootView.findViewById(R.id.yourTextViewId);
return rootView;
}

JSONPARSING error in findViewById

Here's my code in the main activity don'tn know why error in findViewById occurs
.. this is just my first time in JSON paarsing .
public class HomeFragment extends Fragment{
public HomeFragment(){}
View rootView;
ListView list;
ActorsAdapter adapt;
ArrayList<Actors> actorslist;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.home_fragment, container, false);
list = (ListView)findViewById(R.id.listFeeds);
actorslist = new ArrayList<Actors>();
return rootView;
new ActorsAsynTask().execute("http://jcasim.5gbfree.com/Project/login.php");
}

listFeeds It's a component I'm pretty sure is a component that lives in your fragment. Since you haven't return the root view yet, the findViewById is not going to find it. you have to wait until it's on screen to ask for it using findViewById (in onStart() method) or ask it form the root view before you return it.
it would be list = (ListView)rootView.findViewById(R.id.listFeeds);

The View of the Fragment is not set before the onCreateView() returns. Therefore the findViewById() tries to find the specified R.id.listFeedsfrom a null reference.
Try this instead list = (ListView)rootView.findViewById(R.id.listFeeds);

Android Error using findViewById

I am new to this android application development. I am trying to find textfield using findViewById Eclipse keep asking me to create a new method for findViewById. Here is my code.
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle SavedInstanceState) {
return inflater.inflate(R.layout.myFragment, container,false);
//find textarea
TextView textArea = (TextView) findViewById(R.id.txtField_curDateTime);
}
Please note i have myFragment.java and myFragment.xml files.
Appreciate your help.
Thanks

Do it like this:
View v = inflater.inflate(R.layout.myFragment, container,false);
TextView textArea = (TextView) v.findViewById(R.id.txtField_curDateTime);
return v;
Moreover, define TextView textArea outside the onCreateView so that its available to other methods too.

Try this:
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle SavedInstanceState) {
View vObject = inflater.inflate(R.layout.myFragment, container,false);
//find textarea
TextView textArea = (TextView)vObject.findViewById(R.id.txtField_curDateTime);
return vObject;
}

Unexpected NoSaveStateFrameLayout with support Fragment

I am in trouble when trying to get the baseView(inflated in onCreateView and returned) in fragment, because I receive unexpected NoSaveStateFrameLayout.
I don't know why, can anyone explain?
Code:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
LogUtil.d(TAG, "onCreateView ...");
View v = inflater.inflate(R.layout.gen_blank, container, false);
return v;
}
When I run this code in all life cycles:
LogUtil.v(TAG, "getview = "+getView());
It logs the same msg: getview = android.support.v4.app.NoSaveStateFrameLayout#41afdb70

The support library inserts an additional view into the view hierarchy. According to a comment in NoSaveStateFrameLayout.java: "Pre-Honeycomb versions of the platform don't have View.setSaveFromParentEnabled(), so instead we insert this between the view and its parent."
So you will need to either check for this with something like:
View myView = (NoSaveStateFrameLayout)getView();
if (myView != null) {
myView = myView.getChildAt(0);
}
Or keep track of the view returned by onCreateView in an instance variable.