How to dynamically add multiple array-list in a List

Question

I want to add multiple array-list in a list and display in list-view using custom adapter with section. i have tried here is my code i tried

   for (int i=0;i<mModelJsoncatData.size();i++){
                if (mModelJsoncatData.get(i).getCatName().equals("Eating")) {
                    ListAll.add(new String(mModelJsoncatData.get(i).getCatName()));
                    ListAll.addAll(mModelJsonEating);
                }
                if (mModelJsoncatData.get(i).getCatName().equals("Feeling")) {
                    ListAll.add(new String(mModelJsoncatData.get(i).getCatName()));
                    ListAll.addAll(mModelJsonFeeling);
                }
                if (mModelJsoncatData.get(i).getCatName().equals("Listening to")) {
                    ListAll.add(new String(mModelJsoncatData.get(i).getCatName()));
                    ListAll.addAll(mModelJsonListening);
                }
                if (mModelJsoncatData.get(i).getCatName().equals("Watching")) {
                    ListAll.add(new String(mModelJsoncatData.get(i).getCatName()));
                    ListAll.addAll(mModelJsonWatching);
                }
            }
MAdapter adapter=new MAdapter(this,ListAll);
listview1.setAdapter(adapter);

but its not showing the desired results any suggestions or help needed

Community · Accepted Answer · 2017-05-23 11:46:37Z

0

What you want is a list of lists!

List<List<Integer>> lists = new ArrayList<List<Integer>>();
for (int i = 0; i < 4; i++) {
    List<Integer> list = new ArrayList<>();
    lists.add(list);
    // Use the list further...
}

To Merge 3 arraylist to one

List<String> combined = new ArrayList<String>();
combined.addAll(firstArrayList);
combined.addAll(secondArrayList);
combined.addAll(thirdArrayList);

Reference :-https://stackoverflow.com/a/8625256/7795876

edited May 23, 2017 at 11:46

CommunityBot

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answered Apr 13, 2017 at 7:52

Saurav Prakash

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3 Comments

Noman Malik Over a year ago

i want to add multiple array-lists in a list and want to display in listview

Noman Malik Over a year ago

i have 5 array list and with different model classes and i want to display these in a single list view with section header one after another

Noman Malik Over a year ago

not worked because i have different data types in each array list and now idea about sections

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