我正在使用 Android 中的 ExpandableListView。
我有一个夸大这个视图的对话框:
<ExpandableListView
android:id="@+id/comments_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/editTextNewComment"
android:layout_alignParentLeft="true" >
</ExpandableListView>
<EditText
android:id="@+id/editTextNewComment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/imageButtonPostNewComment"
android:ems="10"
android:singleLine="true" >
<requestFocus />
</EditText>
对于 getgroupview() 方法,我的 BaseExpandableListAdapter 看起来像这样:
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
Log.d("LIST", "getGroupView() groupPosition " + groupPosition + " isExpanded " + isExpanded + " row " + row);
if(row==null) {
LayoutInflater infl = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = infl.inflate(R.layout.list_item_comment,parent,false);
holder = new ViewHolder(row);
holder.imbutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Integer pos = (Integer) v.getTag();
//Do something
}
});
row.setTag(holder);
}
else {
holder = (ViewHolder) row.getTag();
}
holder.imbutton.setTag(Integer.valueOf(groupPosition));
holder.header.setText(""+ (groupPosition+1) + " - " + comments[groupPosition].getOwner());
//.... etc - setting all the textviews accordingly
return row;
}
对于我的问题:
当我在我的edittext中写东西时,getgroupview一直被调用!这是仅在编辑文本中添加一个字母的日志输出:
03-15 14:07:51.072: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.080: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.088: D/LIST(4176): getChildView()
03-15 14:07:51.096: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.104: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.111: D/LIST(4176): getChildView()
03-15 14:07:51.119: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.119: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.127: D/LIST(4176): getChildView()
03-15 14:07:51.135: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.135: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.143: D/LIST(4176): getChildView()
03-15 14:07:51.151: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.151: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.158: D/LIST(4176): getChildView()
03-15 14:07:51.205: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.205: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.213: D/LIST(4176): getChildView()
03-15 14:07:51.213: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.213: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.221: D/LIST(4176): getChildView()
03-15 14:07:51.221: D/LIST(4176): getGroupView() groupPosition 0 isExpanded false row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.221: D/LIST(4176): getGroupView() groupPosition 1 isExpanded true row android.widget.RelativeLayout{41a17d98 V.E..... ......I. 0,0-0,0}
03-15 14:07:51.229: D/LIST(4176): getChildView()
对于输入的每个字母,getGroupView() 和 getChildView() 都会被调用多次。在上面的示例中,列表视图显然被重绘了八次(对于该示例,我在列表中有 2 个组视图和一个子视图。)
我错过了什么?当我在编辑文本中键入内容时,甚至不需要重绘列表视图。即使它被重绘,为什么会有八次调用不同的 getview 方法?
编辑:我现在看到,即使我折叠和/或展开组视图,也有很多调用 getgroupview 和 getchildview-methods。这是应该的吗?
EDIT2:现在在正常活动中使用带有edittext的列表进行了一些测试,似乎该列表没有那么频繁地重绘。所以问题似乎在于我在对话框中提出这个问题。看不出为什么它甚至需要重绘。