CODEWITHSUNDEEP
androidlistlistviewcustom-lists
Kumar Bankesh
Kumar Bankesh

Reputation: 258

Create list view with custom set of data in android?

I am trying to create ListView with custom data set as follows:

String superType = "random1";
String superTypea = "random12";
String superType12 = "random2";

String superType_amount = "child1";
String childtype_calulated = "2323";

 String superType_amount = "child2";
String childtype_calulated = "23223";

 String superType_amount = "child2";
String childtype_calulated = "amount3";

Now I want to create ListView with this set of data how to do that?

Here is the list structure...

row1=superType  |superType_amount |childtype_calulated 
row2=superTypea |superType_amount |childtype_calulated
row3=superType12|superType_amount |childtype_calulated

Is there any solution of this?

Upvotes: 2

Views: 2564

Answers (1)

JoeBruzek
JoeBruzek

Reputation: 509

It is absolutely possible to do this. First, I would recommend putting your data into a collection. It would be preferable to put them into an object and then a collection of those objects. From there you can add a ListView to your main layout, define a custom layout for your list items, and populate your ListView using an ArrayAdapter.

Here is a really good example of how you can do this well. It includes examples of loading data from an external source, which you don't need.

However, if you're getting into development now I would suggest you look into RecyclerView as well. RecyclerView is new and included in the AppCompat v7 library for use on pre-Lollipop Android. A RecyclerView will be a little more complicated to implement for a simple list but is significantly more scalable and efficient. I believe it is Google's intention to replace ListView with RecyclerView entirely in the future.

Here is a pretty simple introduction to making a list with RecyclerView.

EDIT

Using an ArrayAdapter with a ListView. First you need to create a model to store your data, some kind of class that you can put into a collection, for example: 

public class Item {
    public String title;
    public String sub1;
    public String sub2;

    public void Item(String t, String s1, String s2) {
        title = t;
        sub1 = s1;
        sub2 = s2;
    }
}

Then you need to define the layout for the item in your list:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="horizontal" >
    <TextView
      android:id="@+id/title"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
   <TextView
      android:id="@+id/sub1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
   <TextView
      android:id="@+id/sub2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
</LinearLayout>

Then in you need to make your custom ArrayAdapter by extending the ArrayAdapter class:

public class ItemAdapter extends ArrayAdapter<Item> {
    public ItemAdapter(Context context, ArrayList<Item> items) {
       super(context, 0, items);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       Item item = getItem(position);    

       if (convertView == null) {
          convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_layout, parent, false);
       }

       TextView title = (TextView) convertView.findViewById(R.id.title);
       TextView sub1 = (TextView) convertView.findViewById(R.id.sub1);
       TextView sub2 = (TextView) convertView.findViewById(R.id.sub2);

       title.setText(item.title);
       sub1.setText(item.sub1);
       sub2.setText(item.sub2);

       return convertView;
   }
}

Then all you need to do is create an instance of the adapter in your main class and attach your collection to it:

ArrayList<Item> data = new ArrayList<Item>();

ItemAdapter adapter = new ItemAdapter(this, data);

ListView listView = (ListView) findViewById(R.id.list_view);
listView.setAdapter(adapter);

This should populate your ListView with all the items that you need in your list. I haven't run any of this code so there might be one or two small bugs for you to fix.

Upvotes: 2

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