如何在Android Activity中扩展ListActivity AppCompatActivity的位置

我想使用Activity扩展ListActivity for PullToRefresh.But我使用CustomActionBar这就是使用AppCompatActivity.How来解决这个问题的原因。谢谢你在Advanced中

public class CustomActionActivity extends ListActivity public class PullToRefreshActivity extends ListActivity { private LinkedList 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(); mListItems.addAll(Arrays.asList(mStrings)); ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, mListItems); setListAdapter(adapter); } 

而不是这个：

 public class CustomActionActivity extends AppCompatActivity 

Answer 1

如果要在应用程序中使用ListView，请直接使用它而不扩展ListActivity。 喜欢这个

 public class PullToRefreshActivity extends AppCompatActivity { private LinkedList 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(); mListItems.addAll(Arrays.asList(mStrings)); ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, mListItems); listView.setAdapter(adapter); } 

Answer 2

根据Java doucmentation https://docs.oracle.com/javase/tutorial/java/IandI/multipleinheritance.html，我们不能inheritance多个类。 所以，如果你想要两个function，那么在你的布局中使用ListView 。