How to add a custom adapter to the ListView

I'd like to put a custom adapter in the list view, but I'm posting a question because I thought I could get related data. I'd appreciate it if you could show me an example.

android listview custom-adapter tablelayout

2022-09-21 16:01

1 Answers

public class ListAdapter extends ArrayAdapter<Item> {

    public ListAdapter(Context context, int textViewResourceId) {
        super(context, textViewResourceId);
    }

    public ListAdapter(Context context, int resource, List<Item> items) {
        super(context, resource, items);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View v = convertView;

        if (v == null) {
            LayoutInflater vi;
            vi = LayoutInflater.from(getContext());
            v = vi.inflate(R.layout.itemlistrow, null);
        }

        Item p = getItem(position);

        if (p != null) {
            TextView tt1 = (TextView) v.findViewById(R.id.id);
            TextView tt2 = (TextView) v.findViewById(R.id.categoryId);
            TextView tt3 = (TextView) v.findViewById(R.id.description);

            if (tt1 != null) {
                tt1.setText(p.getId());
            }

            if (tt2 != null) {
                tt2.setText(p.getCategory().getId());
            }

            if (tt3 != null) {
                tt3.setText(p.getDescription());
            }
        }

        return v;
    }

}

This is the class I used in my project. The items you want to see on the list were written as List items in the example above, but you can change them to what you want. And you can change the getView method by referring to the above.

Below is R.layout.itemlistrow.xml, which defines how each item should be displayed.

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content" android:orientation="vertical"
    android:layout_width="fill_parent">

    <TableRow android:layout_width="fill_parent"
              android:id="@+id/TableRow01"
              android:layout_height="wrap_content">

        <TextView android:textColor="#FFFFFF"
                  android:id="@+id/id"
                  android:layout_width="fill_parent"
                  android:layout_height="wrap_content"
                  android:text="id" android:textStyle="bold" 
                  android:gravity="left"
                  android:layout_weight="1" 
                  android:typeface="monospace"
                  android:height="40sp" />
    </TableRow>

    <TableRow android:layout_height="wrap_content"
              android:layout_width="fill_parent">

        <TextView android:textColor="#FFFFFF" 
                  android:id="@+id/categoryId"
                  android:layout_width="fill_parent"
                  android:layout_height="wrap_content"
                  android:text="categoryId" 
                  android:layout_weight="1" 
                  android:height="20sp" />

        <TextView android:layout_height="wrap_content"
                  android:layout_width="fill_parent" 
                  android:layout_weight="1"
                  android:textColor="#FFFFFF"
                  android:gravity="right"
                  android:id="@+id/description"
                  android:text="description" 
                  android:height="20sp" />
    </TableRow>

</TableLayout>

You can also make a layout as you want to see how to show each line of the list and modify it. Use is

ListView yourListView = (ListView) findViewById(R.id.itemListView);
ListAdapter customAdapter = new ListAdapter(this, R.layout.itemlistrow, List<yourItem>);
yourListView .setAdapter(customAdapter);

You can do it like this. I hope it helps.

2022-09-21 16:01

If you have any answers or tips

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