I’m trying to use Fragment with a ViewPager using the FragmentPagerAdapter. What I’m looking for to achieve is to replace a fragment, positioned on the first page of the ViewPager, with another one. The pager is composed of two pages. The first one is the FirstPagerFragment, the second one is the SecondPagerFragment. Clicking on a … Read more
How should you implement the sort of sliding that for example the Honeycomb Gmail client uses? Can TransactionManager handle this automatically by adding and removing the Fragments, it’s kind of difficult to test this due to the emulator being a slideshow 🙂 6 Answers 6
I have a Fragment with a constructor that takes multiple arguments. My app worked fine during development, but in production my users sometimes see this crash: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment make sure class name exists, is public, and has an empty constructor that is public I could make an empty constructor as this error … Read more
When I’m showing one fragment (which is full screen with #77000000 background) over another fragment (let’s call it main), my main fragment still reacts to clicks (we can click a button even if we don’t see it). Question: how to prevent clicks on first (main) fragment? EDIT Unfortunately, I can’t just hide main fragment, because … Read more
I’m coming from iOS where it’s easy and you simply use a UIViewController. However, in Android things seem much more complicated, with certain UIComponents for specific API Levels. I’m reading BigNerdRanch for Android (the book is roughly 2 years old) and they suggest I use Activity to host my FragmentActivities. However, I thought Activity was … Read more
I have a fragment I am trying to add into a view. FragmentManager fragMgr=getSupportFragmentManager(); feed_parser_activity content = (feed_parser_activity)fragMgr .findFragmentById(R.id.feedContentContainer); FragmentTransaction xaction=fragMgr.beginTransaction(); if (content == null || content.isRemoving()) { content=new feed_parser_activity(item.getLink().toString()); xaction .add(R.id.feedContentContainer, content) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN) .addToBackStack(null) .commit(); Log.e(“Abstract”, “DONE”); } When this code is executed I get the following error in debug.. java.lang.IllegalArgumentException: No view found … Read more
I can’t update the content in ViewPager. What is the correct usage of methods instantiateItem() and getItem() in FragmentPagerAdapter class? I was using only getItem() to instantiate and return my fragments: @Override public Fragment getItem(int position) { return new MyFragment(context, paramters); } This worked well. Except I can’t change the content. So I found this: … Read more
I have updated my app to use the latest support library (version 23.0.0), I’ve found out that they deprecated the onAttach() function of the Fragment class. Instead of: onAttach (Activity activity) It’s now: onAttach (Context context) As my app uses the activity passed before deprecation, a possible solution i think is: @Override public void onAttach(Context … Read more
I have an application with three tabs. Each tab has its own layout .xml file. The main.xml has its own map fragment. It’s the one that shows up when the application first launches. Everything works fine except for when I change between tabs. If I try to switch back to the map fragment tab, I … Read more
What is the main difference between calling these methods: fragmentTransaction.addToBackStack(name); fragmentTransaction.replace(containerViewId, fragment, tag); fragmentTransaction.add(containerViewId, fragment, tag); What does it mean to replace an already existing fragment, and adding a fragment to the activity state, and adding an activity to the back stack? Secondly, with findFragmentByTag(), does this search for tag added by the add()/replace() method … Read more
