我添加了两个按钮（添加和删除）来控制列表视图，当我删除一个项目时，该项目不会立即在列表视图中消失，只有当我在列表视图上滑动时，新项目才会消失。除非我触摸屏幕或在列表视图上滑动，否则在我删除项目后不会调用适配器中的 getView()。有人能告诉我为什么吗？
我的 xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/locationlist_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >"
<RelativeLayout
android:id="@+id/locationlisttitle_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:background="#ADD8E6">
<ImageView
android:id="@+id/iv_menu2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:src="@drawable/img_menu" />
<TextView
android:id="@+id/txtv_locationmanagetitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Manage Location List"
android:textSize="20sp" />
<ImageView
android:id="@+id/iv_addlocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/txtv_locationmanagetitle"
android:src="@drawable/addlocation" />
<ImageView
android:id="@+id/iv_deletelocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/iv_addlocation"
android:src="@drawable/deletelocation" />
</RelativeLayout>
<ListView
android:id="@+id/lv_locations"
android:layout_height="500dp"
android:layout_width="fill_parent" />
</LinearLayout>
我的按钮单击事件处理程序
ivbtn_deleteLocation.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//remove selected items from the locationList
Collections.sort(listStr);
for (int i = listStr.size()-1; i >= 0; i--) {
Log.i("zhijianw", "remove"+listStr.get(i));
Log.i("zhijianw", "remove"+locationList.get(Integer.parseInt(listStr.get(i))).get("txtv_locationitem"));
String remLocation = locationList.get(Integer.parseInt(listStr.get(i))).get("txtv_locationitem").toString();
locationList.remove(Integer.parseInt(listStr.get(i)));
removeLocation(remLocation);
}
listStr = new ArrayList<String>();
locationsAdapter.notifyDataSetChanged();
}
});
我的适配器
public MyAdapter(Context context, List<HashMap<String, Object>> list, int resource, String[] from, int[] to) {
this.context = context;
this.list = list;
keyString = new String[from.length];
idValue = new int[to.length];
System.arraycopy(from, 0, keyString, 0, from.length);
System.arraycopy(to, 0, idValue, 0, to.length);
inflater = LayoutInflater.from(context);
init();
Log.i("zhijianw", "my adapter called");
}
public void init() {
isSelected = new HashMap<Integer, Boolean>();
for (int i = 0; i < list.size(); i++) {
isSelected.put(i, false);
}
}
@Override
public int getCount() {
Log.i("zhijianw", "get count called");
return list.size();
}
@Override
public Object getItem(int arg0) {
Log.i("zhijianw", "get item called");
return list.get(arg0);
}
@Override
public long getItemId(int arg0) {
return arg0;
}
@Override
public View getView(int position, View view, ViewGroup arg2) {
init();
Log.i("zhijianw", "get view called");
ViewHolder holder = null;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.location_item, null);
holder.tv = (TextView) view.findViewById(R.id.txtv_locationitem);
holder.cb = (CheckBox) view.findViewById(R.id.cb_locationitem);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
HashMap<String, Object> map = list.get(position);
if (map != null) {
itemString = (String) map.get(keyString[0]);
holder.tv.setText(itemString);
}
holder.cb.setChecked(isSelected.get(position));
return view;
}
}
设置列表视图适配器
lv_menu = (ListView) menu_view.findViewById(R.id.lv_menu);
lv_menu.setAdapter(new ArrayAdapter<String>(this, R.layout.menu_item, R.id.txtv_menuItem, menuChoices));