将值从viewmodel绑定到listview可以通过以下步骤实现:
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
ListView listView = findViewById(R.id.listView);
List<Person> personList = new ArrayList<>(); // 假设这是要绑定的数据列表
PersonAdapter adapter = new PersonAdapter(this, personList); // PersonAdapter是自定义的适配器类
listView.setAdapter(adapter);
public class PersonAdapter extends BaseAdapter {
private Context context;
private List<Person> personList;
public PersonAdapter(Context context, List<Person> personList) {
this.context = context;
this.personList = personList;
}
@Override
public int getCount() {
return personList.size();
}
@Override
public Object getItem(int position) {
return personList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.list_item, parent, false);
}
TextView nameTextView = convertView.findViewById(R.id.nameTextView);
TextView ageTextView = convertView.findViewById(R.id.ageTextView);
Person person = personList.get(position);
nameTextView.setText(person.getName());
ageTextView.setText(String.valueOf(person.getAge()));
return convertView;
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/nameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="@+id/ageTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp" />
</LinearLayout>
通过以上步骤,就可以将viewmodel中的值绑定到listview中的每个列表项上了。当viewmodel中的数据发生变化时,只需要更新数据列表,并通知适配器刷新即可。
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