Java 未调用自定义ArrayAdapter中的getView
由于某些原因,没有调用自定义ArrayAdapter的getViewint position、View convertView、ViewGroup父级,android会显示一个空列表。我已经覆盖了getCountJava 未调用自定义ArrayAdapter中的getView,java,android,android-listview,android-arrayadapter,Java,Android,Android Listview,Android Arrayadapter,由于某些原因,没有调用自定义ArrayAdapter的getViewint position、View convertView、ViewGroup父级,android会显示一个空列表。我已经覆盖了getCount public class CEL_ElementsFromXMLArrayAdapter extends ArrayAdapter<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage&g
public class CEL_ElementsFromXMLArrayAdapter extends ArrayAdapter<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> {
private Context context;
private int resource;
private List<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> elementsFromXMLList;
public CEL_ElementsFromXMLArrayAdapter(Context context, int resource,
List<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> elementsFromXMLList) {
super(context, resource, elementsFromXMLList);
this.context = context;
this.resource = resource;
this.elementsFromXMLList = elementsFromXMLList;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final int positionItem = position;
View view;
LayoutInflater viewInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(convertView != null)
view = convertView;
else
view = viewInflater.inflate(R.layout.etat_piece_item, parent, false);
{...}
return view;
}
@Override
public int getCount() {
return this.elementsFromXMLList.size();
}
我从昨天开始就在寻找解决方案,我已经阅读了所有关于StackOverflow的帖子,但没有一篇与我的问题相匹配。所以我想知道,它是否可以来自LinkedHashMap
编辑:这是我的布局R.layout.etat\u工件\u项目
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mis2_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="1dip"
android:background="@color/white"
android:orientation="horizontal"
android:weightSum="12" >
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<TextView
android:id="@+id/descriptionElement_TextView"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:clickable="true"
android:gravity="center"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:textColor="@color/black1"
android:textSize="@dimen/mis_item_size" />
<ImageView
android:id="@+id/stroke_dim"
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<Spinner
android:id="@+id/typeElement_Spinner"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_weight="2.5"
android:background="@drawable/spinner_ab_default"
android:clickable="true"
android:paddingLeft="5dp"
android:paddingTop="10dp"
android:textSize="@dimen/mis_item_size"
android:textStyle="normal" />
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<EditText
android:id="@+id/quantiteElement_EdiText"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:gravity="center"
android:inputType="number"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:singleLine="true"
android:textColor="@color/black1"
android:textSize="@dimen/mis_item_size" />
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<TextView
android:id="@+id/etatElement_TextView"
style="@android:style/Widget.Holo.Light.EditText"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_weight="1.5"
android:clickable="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:onClick="callChooseEtat"
android:paddingLeft="5dp"
android:paddingTop="10dp"
android:textStyle="normal" />
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<TextView
android:id="@+id/ent_obervations_val"
style="@android:style/Widget.Holo.Light.EditText"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:clickable="true"
android:gravity="center"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:singleLine="true"
android:textColor="@color/black1"
android:textSize="@dimen/mis_item_size" />
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<LinearLayout
android:id="@+id/imageLayout"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center"
android:onClick="callCameraInList" >
<ImageView
android:id="@+id/photoElement_ImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:contentDescription="@string/img"
android:src="@drawable/photo_img" />
</LinearLayout>
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<EditText
android:id="@+id/trouElement_EditText"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:gravity="center"
android:hint="@string/zero"
android:inputType="number"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:singleLine="true"
android:textColor="@color/black1"
android:textSize="@dimen/mis_item_size" />
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
<TextView
android:id="@+id/actionElement_TextView"
style="@android:style/Widget.Holo.Light.EditText"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:clickable="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="center"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:singleLine="true"
android:textColor="@color/black1"
android:textSize="@dimen/mis_item_size" />
<ImageView
android:layout_width="@dimen/stroke_dim"
android:layout_height="fill_parent"
android:background="@color/light_line"
android:contentDescription="@string/img" />
</LinearLayout>
它被调用时,只返回一个空值。ConvertView在第一个getView调用中为null,因此即使不是第一个位置,也必须膨胀某些内容。没有任何东西可以保证它不为null,并且您似乎没有膨胀任何内容 试试这个:
if(convertView != null)
view = convertView;
else
view = viewInflater.inflate(R.layout.yourlayout, parent, false);
其中R.layout.yourlayout是您要填充列表的布局。您是否尝试实际膨胀视图而不是使用转换视图。
仅当阵列适配器中至少填充了一个视图时,Convertview才不会为null是否确实在elementsFromXMLList中有元素?另外,getItem和getItemId的实现是什么?是getCount返回30。但是我没有重写getItem和getItemId,有必要吗?您是否调用notify dataset?因为在填充基础列表时,我现在无法在适配器上访问Eclipse,所以不知道它的确切名称?你会在任何地方更新列表,而不是清除并重新填充它吗?如果对1的回答是“否”或对2的回答是“是”,那就是问题所在。@Guimaresh:重写它当然是完全允许的,因为该方法不是最终的,并且与重写一样有意义getCount@njzk2哦,是的,你重写getItem和getItemId是对的,我犯了一个错误。但不幸的是,重写这些方法并不能解决我的问题。我已经在{…}内完成了这项工作,我确信它没有被调用。实际上,在调试模式下不会调用getView。
public class CEL_ElementsFromXMLArrayAdapter extends ArrayAdapter<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> {
private Context context;
private int resource;
private List<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> elementsFromXMLList;
public CEL_ElementsFromXMLArrayAdapter(Context context, int resource,
List<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> elementsFromXMLList) {
super(context, resource, elementsFromXMLList);
this.context = context;
this.resource = resource;
this.elementsFromXMLList = elementsFromXMLList;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final int positionItem = position;
View view = convertView;
View v = (View)LayoutInflater.from(context).inflate(your layout,parent, false);
// this will make a list item from your layout then insert your data into it's child views
return v;
}
@Override
public int getCount() {
return this.elementsFromXMLList.size();
}
public class CEL_ElementsFromXMLArrayAdapter extends ArrayAdapter<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> {
private Context context;
private int resource;
private List<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> elementsFromXMLList;
public CEL_ElementsFromXMLArrayAdapter(Context context, int resource,
List<LinkedHashMap<RoomItem, LinkedHashMap<ItemType, List<RoomDamage>>>> elementsFromXMLList) {
super(context, resource, elementsFromXMLList);
this.context = context;
this.resource = resource;
this.elementsFromXMLList = elementsFromXMLList;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final int positionItem = position;
View view = convertView;
View v = (View)LayoutInflater.from(context).inflate(your layout,parent, false);
// this will make a list item from your layout then insert your data into it's child views
return v;
}
@Override
public int getCount() {
return this.elementsFromXMLList.size();
}