Wie erstreckt ListActivity wo AppCompatActivity in Android Aktivität

Question

I Aktivität verwenden möchten ListActivity für PullToRefresh.But erstreckt habe ich Gebrauch CustomActionBar Deshalb AppCompatActivity.How dieses issue.Thanks in Advanced zu lösen mit

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); 
    } 

statt dies:

public class CustomActionActivity extends AppCompatActivity 

Answer 1

Wenn Sie ListView in Ihrer App verwenden möchten, dann verwenden Sie es direkt, ohne ListActivity zu erweitern. So

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); 
} 

Answer 2

gemäß der Java doucmentationhttps://docs.oracle.com/javase/tutorial/java/IandI/multipleinheritance.html wir mehrere Klassen nicht erben können. Also, wenn Sie beide Funktionalität dann verwenden Sie ListView in Ihrem Layout.