java 如何在 Android Activity 中扩展 ListActivity 其中 AppCompatActivity
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How to extends ListActivity where AppCompatActivity in Android Activity
提问by p. ld
I want to use Activity extends ListActivity for PullToRefresh.But i have use CustomActionBar that's why using AppCompatActivity.How to solve this issue.Thanks in Advanced
我想使用 Activity extends ListActivity for PullToRefresh。但是我使用了 CustomActionBar 这就是为什么使用 AppCompatActivity.How to solve this issue.Thanks in 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);
}
Instead of this:
取而代之的是：
public class CustomActionActivity extends AppCompatActivity
采纳答案by Chandrakant Dvivedi
If you want to use ListView in your app then directly use it without extending ListActivity. Like this
如果你想在你的应用程序中使用 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);
}
回答by Nigam Patro
As per the Java doucmentationhttps://docs.oracle.com/javase/tutorial/java/IandI/multipleinheritance.htmlwe can't inherit multiple classes. So, if you want both the functionaloty then use ListViewinside your layout.
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，如果你想要两种功能，那么ListView在你的布局中使用。
