我不能为我的生活找出为什么我的ExpandableListView不扩展…我已经使用了log语句关于每个点击监听器,我可以找到ExpandableListView,它看起来不像任何一个被调用.
我知道有很多关于这个话题的帖子,但我已经阅读了所有的内容,尝试了许多事情,没有运气,希望我错过了一些很容易被别人发现的小错误.
主要活动：
public class ForumListActivity extends Activity {
private static ArrayList<Forum> forumList;
private static ArrayList<ArrayList<SubForum>> subForumList;
private ExpandableListView forumListView;
private ForumListAdapter forumListAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.main_page);
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
forumListView = (ExpandableListView) this.findViewById(R.id.main_page_forum_list);
forumList = new ArrayList<Forum>();
subForumList = new ArrayList<ArrayList<SubForum>>();
setUpForums(this);
forumListAdapter = new ForumListAdapter(this,forumList,subForumList);
forumListView.setAdapter(forumListAdapter);
forumListView.setOnGroupExpandListener(new OnGroupExpandListener(){
@Override
public void onGroupExpand(int groupPosition) {
Log.d("onGroupExpand","this works?");
for(int i=0; i<forumListAdapter.getGroupCount(); i++) {
if(i != groupPosition)
forumListView.collapseGroup(groupPosition);
}
}
});
forumListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent,View v,int groupPosition,long id) {
Log.d("onGroupClick:","worked");
parent.expandGroup(groupPosition);
return true;
}
});
}
注意：setUpForums()方法只需要系统数组并将它们放入forumList和subForumList
ListViewAdapter：
public class ForumListAdapter extends BaseExpandableListAdapter {
private ArrayList<Forum> groups;
private ArrayList<ArrayList<SubForum>> children;
private Context ctx;
public ForumListAdapter(Context ctx,ArrayList<Forum> groups,ArrayList<ArrayList<SubForum>> children) {
this.ctx = ctx;
this.groups = groups;
this.children = children;
}
@Override
public Object getChild(int groupPosition,int childPosition) {
return children.get(groupPosition).get(childPosition);
}
@Override
public long getChildId(int groupPosition,int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition,int childPosition,boolean isLastChild,View convertView,ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(ctx);
convertView = inflater.inflate(R.layout.forum_list_child_item_row,null);
}
SubForum currentSubForum = children.get(groupPosition).get(childPosition);
TextView name = (TextView)convertView.findViewById(R.id.child_row_forum_title);
TextView desc = (TextView)convertView.findViewById(R.id.child_row_forum_description);
if (name != null)
name.setText(currentSubForum.getName());
if (desc != null)
desc.setText(currentSubForum.getDescription());
convertView.setFocusableInTouchMode(true);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return children.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
@Override
public int getGroupCount() {
return groups.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition,boolean isExpanded,ViewGroup parent) {
if (convertView == null)
{
LayoutInflater inflater = LayoutInflater.from(ctx);
convertView = inflater.inflate(R.layout.forum_list_group_item_row,null);
}
Forum currentForum = (Forum) groups.get(groupPosition);
TextView name = (TextView) convertView.findViewById(R.id.group_item_forum_title);
//ImageView image = (ImageView) convertView.findViewById(R.id.group_item_expander_image);
if(name != null)
name.setText(currentForum.getName());
/*
if(image != null) {
int[][] group_state_sets = {{},{android.R.attr.state_expanded}};
image.setVisibility(View.VISIBLE);
int stateSetIndex = (isExpanded ? 1 : 0) ;
Drawable drawable = image.getDrawable();
drawable.setState(group_state_sets[stateSetIndex]);
}
*/
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int groupPosition,int childPosition) {
return true;
}
}
集团布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/turquoise_gradient"
android:orientation="horizontal"
android:paddingTop="6dip"
android:paddingBottom="6dip"
android:paddingLeft="6dip" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/turquoise_gradient"
android:orientation="vertical"
android:padding="2dip" >
<TextView
android:id="@+id/group_item_forum_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|left"
android:gravity="left"
android:paddingLeft="5dip"
android:textColor="@color/white"
android:textSize="16dip" />
</LinearLayout>
<!--
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:gravity="center|right">
<ImageView
android:id="@+id/group_item_expander_image"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/collapse_down" />
</LinearLayout> -->
</LinearLayout>
儿童布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/turquoise_gradient"
android:orientation="horizontal"
android:paddingTop="6dip"
android:paddingBottom="6dip"
android:paddingLeft="6dip" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="2dip"
android:background="@drawable/turquoise_gradient" >
<TextView
android:id="@+id/child_row_forum_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="left"
android:layout_gravity="center_vertical"
android:paddingLeft="5dip"
android:textColor="@color/white"
android:maxLines="1"
android:textSize="11dip" />
<TextView
android:id="@+id/child_row_forum_description"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="left"
android:layout_gravity="center_vertical"
android:paddingLeft="15dip"
android:textColor="@color/white"
android:maxLines="2"
android:textSize="11dip" />
</LinearLayout>
</LinearLayout>
主页面布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/black"
android:orientation="vertical" >
<ExpandableListView
android:id="@+id/main_page_forum_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/black"
android:divider="@color/black"
android:dividerHeight="1dip"
android:clickable="true" />
</LinearLayout>
任何您可以提供的帮助是非常感谢！
解决方法
我也遇到像你一样的类似问题.经过几天的调查,我发现我做错了事情.所以我通过做小的修改来修正它正常工作.
我们来看看setOnGroupClickListener中的boolean onGroupClick(…)的正文.你已经返回true,意味着“the click was handled”
如果要扩展,您应该返回false.所以我建议你这样做：
forumListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent,long id) {
Log.d("onGroupClick:","worked");
parent.expandGroup(groupPosition);
return false;
}
});
在android.widget.ExpandableListView类中,有一个名为boolean handleItemClick(View v,int position,long id)的方法,该方法负责扩展/折叠组或将点击传递给适当的子节点.
/* It's a group click,so pass on event */
if (mOnGroupClickListener != null) {
if (mOnGroupClickListener.onGroupClick(this,v,posMetadata.position.groupPos,id)) {
posMetadata.recycle();
return true;
}
}
/* expanding/collapsing/other tasks... */
如果您实现onGroupClick返回true,则第8行以下的代码将永远不会被执行. (这意味着组不会崩溃,扩展)
希望我的答案帮助你:-)祝你好运！
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