ActionBarActivity的＆QUOT; Android的支持-V7-appcompat＆QUOT;与ListActivity在同一活动 [英] ActionBarActivity of "android-support-v7-appcompat" and ListActivity in Same activity

问题描述

如何在其中扩展了ListActivity活动使用的Android的支持-V7-appcompatActionBarActivity。

How to use ActionBarActivity of "android-support-v7-appcompat" in the activity which Extends the ListActivity.

例如我有一个活动

public class xxxxxListActivity
  extends ListActivity implements OnItemSelectedListener  { 
  // ...................
} 

在上面的活动，我想用ActionBarActivity但与Java dosent支持多重继承我无法得到它的工作。

In the above activity i want to use "ActionBarActivity" but as java dosent support multiple inheritance I am not able to get it working.

推荐答案

下面是ActionBarListActivity的实现：

Here's an implementation of ActionBarListActivity:

public abstract class ActionBarListActivity extends ActionBarActivity {

private ListView mListView;

protected ListView getListView() {
    if (mListView == null) {
        mListView = (ListView) findViewById(android.R.id.list);
    }
    return mListView;
}

protected void setListAdapter(ListAdapter adapter) {
    getListView().setAdapter(adapter);
}

protected ListAdapter getListAdapter() {
    ListAdapter adapter = getListView().getAdapter();
    if (adapter instanceof HeaderViewListAdapter) {
        return ((HeaderViewListAdapter)adapter).getWrappedAdapter();
    } else {
        return adapter;
    }
}
}

就像普​​通ListActivity，你需要的是包含了ID android.R.id.list一个ListView（：在XML@android ID /列表）的布局。

Just like regular ListActivity, you'll need a layout that contains a ListView with the ID android.R.id.list ("@android:id/list" in XML).

在getListAdapter（）的高谈阔论是处理其中的header视图被添加到ListView箱子。好像ListView的设置它自己的适配器到<一个href="http://developer.android.com/reference/android/widget/HeaderViewListAdapter.html">HeaderViewListAdapter,所以我们要尝试并获得包裹适配器prevent转换错误。

The spiel in getListAdapter() is to handle cases where header views have been added to the ListView. Seems like ListView sets its own adapter to a HeaderViewListAdapter, so we have to try and get the wrapped adapter to prevent casting errors.

编辑：尝试添加该功能，以满足需要onListItemClick：

Try adding this function to satisfy the need for onListItemClick:

protected void onListItemClick(ListView lv, View v, int position, long id) {
    getListView().getOnItemClickListener().onItemClick(lv, v, position, id);
}

这篇关于ActionBarActivity的＆QUOT; Android的支持-V7-appcompat＆QUOT;与ListActivity在同一活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！