Intro: The basic “Fragments Tutorial” pattern goes something like this: On a tablet, have a list on the left, details on the right. Both are Fragments and both reside in the same Activity. On a phone, have a list Fragment in one Activity. Launch a new Activity with the details Fragment. (e.g. Android 3.0 Fragments … Read more
I have a FragmentActivity and I want to use a map fragment within it. I’m having a problem getting the support fragment manager to access it. if (googleMap == null) { googleMap = ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map1)).getMap(); // check if map is created successfully or not if (googleMap == null) { Toast.makeText(getApplicationContext(), “Sorry! unable to create … Read more
How can I pass data between a fragment and its container activity? Is there something similar to passing data between activities through intents? I read this, but it didn’t help much: http://developer.android.com/guide/topics/fundamentals/fragments.html#CommunicatingWithActivity 16 Answers 16
I have a DialogFragment that contains a RecyclerView (a list of cards). Within this RecyclerView are one or more CardViews that can have any height. I want to give this DialogFragment the correct height based on the CardViews that are contained within. Normally this would be simple, I would set wrap_content on the RecyclerView like … Read more
When I start an activity which implements viewpager, the viewpager created various fragments. I want to use different layouts for each fragment, but the problem is that viewpager shows only two layouts at the max (second layout on all of the remaining fragments after 1). Here is the code for SwipeActivity which implements the viewpager … Read more
In developer console error reports sometimes I see reports with NPE issue. I do not understand what is wrong with my code. On emulator and my device application works good without forcecloses, however some users get NullPointerException in fragment class when the getActivity() method is called. Activity pulic class MyActivity extends FragmentActivity{ private ViewPager pager; … Read more
I have placed setHasOptionsMenu(true) inside onCreateView, but I still can’t call onCreateOptionsMenu inside fragments. @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { setHasOptionsMenu(true); return inflater.inflate(R.layout.facesheet, container, false); } Below is my onCreateOptionsMenu code. @Override public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) { getSupportMenuInflater().inflate(R.menu.layout, menu); return (super.onCreateOptionsMenu(menu)); } The error message I get: The method onCreateOptionsMenu(Menu) of … Read more
I have a fragment (F1) with a public method like this public void asd() { if (getActivity() == null) { Log.d(“yes”,”it is null”); } } and yes when I call it (from the Activity), it is null… FragmentTransaction transaction1 = getSupportFragmentManager().beginTransaction(); F1 f1 = new F1(); transaction1.replace(R.id.upperPart, f1); transaction1.commit(); f1.asd(); It must be something that … Read more
How to transfer some data to another Fragment likewise it was done with extras for intents? 11 Answers 11
I have multiple fragment inside an activity. On a button click I am starting a new fragment, adding it to backstack. I naturally expected the onPause() method of current Fragment and onResume() of new Fragment to be called. Well it is not happening. LoginFragment.java public class LoginFragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup … Read more
