如何扩展 ListActivity where AppCompatActivity in Android Activity

Question

我想为 PullToRefresh.But 使用 Activity extends ListActivity 我已经使用了 CustomActionBar 这就是为什么使用 AppCompatActivity.How 来解决这个 issue.Thanks 在 Advanced

public class CustomActionActivity extends ListActivity

public class PullToRefreshActivity extends ListActivity {
    private LinkedList<String> mListItems;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pull_to_refresh);

        // Set a listener to be invoked when the list should be refreshed.
        ((PullToRefreshListView) getListView()).setOnRefreshListener(new PullToRefreshListView.OnRefreshListener() {
            @Override
            public void onRefresh() {
                // Do work to refresh the list here.
                new GetDataTask().execute();
            }
        });

        mListItems = new LinkedList<String>();
        mListItems.addAll(Arrays.asList(mStrings));

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, mListItems);

        setListAdapter(adapter);
    }

而不是这个：

public class CustomActionActivity extends AppCompatActivity

Answer 1

根据 Java 文档 https://docs.oracle.com/javase/tutorial/java/IandI/multipleinheritance.html 我们不能继承多个类。所以，如果你想要这两个功能，那么在你的布局中使用 ListView。

Answer 2

如果你想在你的应用中使用ListView，那么直接使用它而不扩展ListActivity。像这样

public class PullToRefreshActivity extends AppCompatActivity {
private LinkedList<String> mListItems;
PullToRefreshListView listView;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.pull_to_refresh);
    listView = (PullToRefreshListView) findViewById(R.id.list_view); 
    // Set a listener to be invoked when the list should be refreshed.
    listView.setOnRefreshListener(new PullToRefreshListView.OnRefreshListener() {
        @Override
        public void onRefresh() {
            // Do work to refresh the list here.
            new GetDataTask().execute();
        }
    });

    mListItems = new LinkedList<String>();
    mListItems.addAll(Arrays.asList(mStrings));

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, mListItems);

    listView.setAdapter(adapter);
}

如何扩展 ListActivity where AppCompatActivity in Android Activity

How to extends ListActivity where AppCompatActivity in Android Activity

java

android

android-listview

android-activity