How to get a value from listview with multidimensional array?

Question

So I have a multidimensional array for my listview, it constructed like this:

    String[][] listControls = {
            {"Shutdown Host","10"},
            {"Close Connection","1"}};

Let say the first String is the text I want to display in the list view, and the other one is a id/message to send via socket (lets say it a secret value).

I coded the Adapter like this:

    ArrayAdapter adapter = new ArrayAdapter<String>(this,R.layout.layout_listview);
        for(int i = 0; i < listControls.length; i++) {
            adapter.add(listControls[i][0]);
        }

    listView = (ListView) findViewById(R.id.controls_listView);
    listView.setAdapter(adapter);
    listView.setClickable(true);

And I constructed the click listener of an item:

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Object obj = listView.getItemAtPosition(position);

                //What should I add here? to get specific value from the array?
                //Integer cmdId = Integer.parseInt( ... );


            }
        });

From the click listener, i want to get the other value, e.g. If I clicked "Close Connection" in list view, I want to get the "1" value from it and put it into a variable. Thanks in advance for the help.

TheAnkush · Accepted Answer · 2019-05-14 15:47:41Z

1

Write custom adapter for your case. Use HashMap which is always better.

HashMap<String, Integer> map = new LinkedHashMap<>();
map.add("Shut Down Host", 0);
map.add("Close connection", 1);

And most importantly use RecyclerView.

Tutorial for RecyclerView https://developer.android.com/guide/topics/ui/layout/recyclerview

answered May 14, 2019 at 15:47

TheAnkush

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3 Comments

Brother Over a year ago

HashMap it is a good way to go, better than multidimensional arrays, but still a class and objects for this options would be better.

Evan Gunawan Over a year ago

I created custom adapter and using hashmap for it. But, how to call the method and return the hashmap value in the click listener using position? Thanks

Evan Gunawan Over a year ago

Nevermind, i found it myself from stackoverflow.com/questions/22449548/…. Thanks for the help ;)

r2rek · Accepted Answer · 2019-05-14 15:43:08Z

1

What you could do is

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                  String value = listControls[position][1] 
            }

This will, of course work only if you have access to listControls. If not, I'd opt for creating an object SomethingWithCode(String text, Int code)[or just Pair in kotlin] and creating a custom adapter.

Hope this helps!

Also, you probably don't need multidimensional array for it, if you're always passing just two values(refer to object with string and int parameters)

answered May 14, 2019 at 15:43

r2rek

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