更新Android中的片段

Question

say I have a few fragments displaying and doing certain things. Now, based on some event, I want to change the screen(or content) for a fragment. [EDIT]

For example.

My first layout, layout A, has a listview. And another layout, layout B has a table view. I am currently displaying the layout A in the fragment. On list item click, I want to display layout B in the same fragment.

How is this done?

Thanks.

Answer 1

If I understand your question correctly this is how I would go about it.

I assume you have created fragment classes for your list fragment (fragment A) and view fragment (fragment B).

We can use the fragmentManager to be able to swap out fragments in the layout view.

//grab fragmentManager, this will allow us to switch out fragments
FragmentManager fragManager = getFragmentManager();
FragmentTransaction fragTransaction = fragManager.beginTransaction();

//first remove the current fragment
fragTransaction.remove(fragManager.findFragmentById(R.id.layout_view));

//replace the current FragmentA with FragmentB
fragTransaction.replace(R.id.layout_view, new FragmentB());

//add to backstack if you want the android back button to work properly
fragTransaction.addToBackStack(null);

//and lastly, we commit the changes to the fragmentManger's transaction
fragTransaction.commit();

Hopefully this helps.

Answer 2

My first layout, layout A, has a listview. And another layout, layout B has a table view. I am currently displaying the layout A in the fragment. On list item click, I want to display layout B in the same fragment.

How is this done?

You could use the new nested fragments API(available through the compatibility package and with normal fragments API 16+). Instead of the current Fragment that holds a ListView (and which you'll replace by a table), you'll have a wrapper Fragment , one that has as its view a single FrameLayout for its content.

You'll then create two fragments one containing the ListView and containing the table layout. Initially you'll add the list based fragment to the wrapper fragment to obtain the start layout and on the item click event you'll use the getChildFragmentManager() to replace the list based fragment with the table based fragment(all in the wrapper fragment).