我正在用listview创建一个类,其中填充了http json数组,之前我做过这个并且代码没问题。但是当我安装应用程序时,我在LogCat中得到了白色屏幕(没有强制关闭)我没有任何错误消息。 LayoutInflater无法设置activity_main。
这是我宣布列表视图的activity_main。
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="@color/black_cool" >
<ListView
android:id="@+id/custom_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:dividerHeight="1dp"
/>
</FrameLayout>
Listview对象位于list_row_layout.xml中,无需发布,一切正常。
public class MainActivity extends Activity {
public ArrayList<FeedItem> feedList;
public ListView feedListView;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_main, container, false);
String url = "...";
new DownloadFilesTask().execute(url);
return rootView;
}
public void updateList() {
feedListView= (ListView) findViewById(R.id.custom_list);
feedListView.setAdapter(new CustomListAdapter(this, feedList));
}
.... json等等......
应该是什么问题?我尝试扩展Fragment但结果相同。我尝试添加onCreate和setContentview但没有帮助我。
答案 0 :(得分:1)
扩展活动覆盖onCreate
。在onCreate
public ListView feedListView;
@Override
public void onCreate(bundle savedInstanceState)
{
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main);
feedListView= (ListView) findViewById(R.id.custom_list);
new DownloadFilesTask().execute(url);
}
答案 1 :(得分:1)
试试extend Activity
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
feedListView= (ListView) findViewById(R.id.custom_list);
String url = "...";
new DownloadFilesTask().execute(url);
feedListView.setAdapter(new CustomListAdapter(this, feedList));
}
并尝试extend Fragment
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_main, container, false);
feedListView= (ListView) rootView.findViewById(R.id.custom_list);
String url = "...";
new DownloadFilesTask().execute(url);
feedListView.setAdapter(new CustomListAdapter(this, feedList));
return rootView;
}
答案 2 :(得分:1)
更改此行
feedListView= (ListView) findViewById(R.id.custom_list);
到
feedListView= (ListView) getView().findViewById(R.id.custom_list);
这是片段。