如何获取通过 FirebaseListAdapter 填充的 ListView 项的值

Question

我有一个 ListView，我使用 FirebaseListAdapter 填充了它。现在我希望 OnItemClickListener 在 Toast.

中显示单击的项目的值（项目上显示的文本）

ListView listView;
ListAdapter listAdapter;

mFirebaseRef = new Firebase("https://<firebase root ref>/posts");
mFirebaseQuery = mFirebaseRef.orderByChild("author_id").equalTo(id); //`id` is a variable defined earlier

listAdapter = new FirebaseListAdapter<Post>(this, Post.class, android.R.layout.simple_list_item_, mFirebaseQuery) {
    @Override
    protected void populateView(View view, Post post) {
        String postTopic = post.getTopic();

        ((TextView) view.findViewById(android.R.id.text1)).setText(postTopic);
    }
};

listView = (ListView) findViewById(R.id.postsList);
listView.setAdapter(listAdapter);

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

        Toast.makeText(getApplicationContext(), "List Item Value: "+topic, Toast.LENGTH_LONG).show();
    }
});

而不是返回项目上显示的文本（在使用 ArrayAdapter 的情况下），String.valueOf returns 对模型的一些引用 class我使用 - Post.class.
输出是这样的：com.example.android.model.Post@a1e1874

谁能告诉我在这种情况下如何获取列表项的值？

Answer 1

AdapterView.getItemAtPosition() returns 一个 Post 对象，所以：

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    Post post = (Post)parent.getItemAtPosition(position);

    String topic = post.getTopic();

    Toast.makeText(getApplicationContext(), "List Item Value: "+topic, Toast.LENGTH_LONG).show();
}

如何获取通过 FirebaseListAdapter 填充的 ListView 项的值

How to get value of a ListView item, populated through FirebaseListAdapter

android

listview

firebase

firebase-realtime-database

firebaseui