How to add a fragment to a programmatically generated layout

Question

I have the following code working which generates fragments  but only if I am adding them to a linear layout which exists in my XML file   LinearLayout fragmentsLayout    LinearLayout  findViewById R id foodItemActvity linearLayout fragments   FragmentManager fragMan   getFragmentManager    FragmentTransaction fragTransaction   fragMan beginTransaction     Fragment myFrag  new ImageFragment    fragTransaction add R id foodItemActvity linearLayout fragments  myFrag    fragment    fragCount   fragTransaction commit      Now what if I want to add that fragment to a linear layout that does not already exist in the XML file such as  LinearLayout rowLayout   new LinearLayout      Part 2       Fragment frag1   generateAppropriateFragment type1       Fragment frag2   generateAppropriateFragment type2        LinearLayout fragmentsLayout    LinearLayout  findViewById R id foodItemActvity linearLayout fragments       LinearLayout rowLayout   new LinearLayout this       rowLayout setId 12345      add counter to end      fragmentsLayout addView rowLayout            getFragmentManager   beginTransaction   add rowLayout getId    frag1   fragment grandchild    fragCount  commit        fragCount        getFragmentManager   beginTransaction   add rowLayout getId    frag2   fragment grandchild    fragCount  commit        fragCount

User · Answer

Below is a working code to add a fragment e g 3 times to a vertical LinearLayout  xNumberLinear   You can change number 3 with any other number or take a number from a spinner   for  int i   0  i  lt  3  i                  LinearLayout linearDummy   new LinearLayout getActivity                 linearDummy setOrientation LinearLayout VERTICAL               if  Build VERSION SDK INT  lt  Build VERSION CODES JELLY BEAN MR1                     Toast makeText getActivity     This function works on newer versions of android   Toast LENGTH LONG  show                   else                   linearDummy setId View generateViewId                               fragmentManager beginTransaction   add linearDummy getId    new SomeFragment    someTag1   commit                 xNumberLinear addView linearDummy

User · Answer

At some point  I suppose you will add your programatically created LinearLayout to some root layout that you defined in  xml  This is just a suggestion of mine and probably one of many solutions  but it works  Simply set an ID for the programatically created layout  and add it to the root layout that you defined in  xml  and then use the set ID to add the Fragment   It could look like this   LinearLayout rowLayout   new LinearLayout    rowLayout setId whateveryouwantasid      add rowLayout to the root layout somewhere here  FragmentManager fragMan   getFragmentManager    FragmentTransaction fragTransaction   fragMan beginTransaction        Fragment myFrag   new ImageFragment    fragTransaction add rowLayout getId    myFrag    fragment    fragCount   fragTransaction commit      Simply choose whatever Integer value you want for the ID   rowLayout setId 12345     If you are using the above line of code not just once  it would probably be smart to figure out a way to create unique-IDs  in order to avoid duplicates   UPDATE   Here is the full code of how it should be done   this code is tested and works  I am adding two Fragments to a LinearLayout with horizontal orientation  resulting in the Fragments being aligned next to each other  Please also be aware  that I used a fixed height and width of 200dp  so that one Fragment does not use the full screen as it would with  match parent    MainActivity java   public class MainActivity extends Activity         SuppressLint  NewApi        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main                 LinearLayout fragContainer    LinearLayout  findViewById R id llFragmentContainer            LinearLayout ll   new LinearLayout this           ll setOrientation LinearLayout HORIZONTAL            ll setId 12345            getFragmentManager   beginTransaction   add ll getId    TestFragment newInstance  I am frag 1     someTag1   commit            getFragmentManager   beginTransaction   add ll getId    TestFragment newInstance  I am frag 2     someTag2   commit             fragContainer addView ll             TestFragment java   public class TestFragment extends Fragment        public static TestFragment newInstance String text             TestFragment f   new TestFragment             Bundle b   new Bundle            b putString  text   text           f setArguments b           return f              Override     public View onCreateView LayoutInflater inflater  ViewGroup container  Bundle savedInstanceState             View v    inflater inflate R layout fragment  container  false              TextView  v findViewById R id tvFragText   setText getArguments   getString  text                  return v            activity main xml    lt RelativeLayout xmlns android  http   schemas android com apk res android      xmlns tools  http   schemas android com tools      android id    id rlMain      android layout width  match parent      android layout height  match parent      android padding  5dp      tools context   MainActivity   gt        lt TextView         android id    id textView1          android layout width  wrap content          android layout height  wrap content          android text   string hello world    gt        lt LinearLayout         android id    id llFragmentContainer          android layout width  match parent          android layout height  match parent          android layout alignLeft    id textView1          android layout below    id textView1          android layout marginTop  19dp          android orientation  vertical   gt       lt  LinearLayout gt   lt  RelativeLayout gt    fragment xml      lt  xml version  1 0  encoding  utf-8   gt   lt RelativeLayout xmlns android  http   schemas android com apk res android      android layout width  200dp      android layout height  200dp   gt        lt TextView         android id    id tvFragText          android layout width  wrap content          android layout height  wrap content          android layout centerHorizontal  true          android layout centerVertical  true          android text      gt    lt  RelativeLayout gt    And this is the result of the above code   the two Fragments are aligned next to each other

[android] How to add a fragment to a programmatically generated layout?

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