[英]ListFragment with a custom view hierarchy results with zero width / height children in onViewCreated
[英]Android + ListFragment with a custom view hierarchy
我试图通过从onCreateView(LayoutInflater, ViewGroup, Bundle)
返回我自己的视图层次结构来自定义片段布局。 这膨胀了我的自定义视图,但似乎堆叠视图而不是在内部膨胀,我立刻看到了所有内容。 任何帮助表示赞赏。
MyActivity.java:
public class MyActivity extends FragmentActivity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
ArrayListFragment list = new ArrayListFragment();
getSupportFragmentManager().beginTransaction().add(android.R.id.content, list).commit();
}
}
public static class ArrayListFragment extends ListFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
inflater.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.main, container);
return super.onCreateView(inflater, container, savedInstanceState);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String List[] = {"Larry", "Moe", "Curly"};
setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, List));
}
}
}
main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="8dp"
android:paddingRight="8dp">
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="THIS IS A BUTTON" />
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00FF00"
android:layout_weight="1"
android:drawSelectorOnTop="false" />
<TextView
android:id="@android:id/empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FF0000"
android:text="No data" />
</LinearLayout>
我没有在ListFragment类的onCreateView方法中返回新视图。 例如:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.main, null);
return view;
}
一切都在Android的土地上运作良好!
我觉得你会更好
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.main, container, false);
return root;
}
优化的方式和拍摄代码
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.list_alphabet, container, false);
}
getSupportFragmentManager().beginTransaction().add(android.R.id.content, list).commit();
列表不被接受,它正在寻找一个片段。
使用这种模式,效果很好!
inflater.inflate(R.layout.list_layout, container, false);
public View inflate(XmlPullParser解析器,ViewGroup根,布尔值attachToRoot)
attachToRoot是否应将膨胀的层次结构附加到根参数? 如果为false,则root仅用于为XML中的根视图创建LayoutParams的正确子类。
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