Java Android ListView适配器-隐藏项
我有一个android listView,它的填充方式如下:Java Android ListView适配器-隐藏项,java,android,android-listview,Java,Android,Android Listview,我有一个android listView,它的填充方式如下: final ListView userList = (ListView)root.findViewById(R.id.userList); UserListAdapter adapter = new UserListAdapter(context, userItemList, getActivity()); userList.setAdapter(adapter); if (convertView == null) { La
final ListView userList = (ListView)root.findViewById(R.id.userList);
UserListAdapter adapter = new UserListAdapter(context, userItemList,
getActivity());
userList.setAdapter(adapter);
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.user_item_list, null);
}
final TextView txtButtonFollow = (TextView) convertView.findViewById(R.id.button);
if(user == "showed") {
button.setVisibility(View.INVISIBLE);
}else {
button.setVisibility(View.INVISIBLE);
}
return convertView;
UserListAdapter如下所示:
final ListView userList = (ListView)root.findViewById(R.id.userList);
UserListAdapter adapter = new UserListAdapter(context, userItemList,
getActivity());
userList.setAdapter(adapter);
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.user_item_list, null);
}
final TextView txtButtonFollow = (TextView) convertView.findViewById(R.id.button);
if(user == "showed") {
button.setVisibility(View.INVISIBLE);
}else {
button.setVisibility(View.INVISIBLE);
}
return convertView;
出于某种原因,所有用户按钮都将显示(首先),但如果我上下滚动列表并“重新输入”用户项,按钮将隐藏(这是我需要的)
有人有同样的问题吗?
是否无法隐藏“滚动”上的元素?
我是否必须设置两个用户项目列表(一个带按钮,另一个不带按钮)
编辑:此处是完整的getView():
你可以改变这个
UserListAdapter adapter = new UserListAdapter(context, userItemList,getActivity());
到
getActivity()
将为您提供上下文
相应地更改适配器构造函数
使用ViewHolder
图案
public static class ViewHolder
{
TextView txtButton ;
}
在getView中
ViewHolder holder;
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.user_item_list, null);
holder.txtButton = (TextView) convertView.findViewById(R.id.button);
convertView.setTag(holder)
} else {
holder = (ViewHolder) convertView.getTag();
}
UserItem userItem = userItems.get(position);
String isContact = userItem.getIsContact();
if(isContact.equals("showed")) {
holder.txtButton .setVisibility(View.VISIBLE);
}else{
holder.txtButton .setVisibility(View.INVISIBLE);
}
return convertView;
你的if语句
if(isContact) { // makes no sense. isContact is not boolean
你可以改变这个
UserListAdapter adapter = new UserListAdapter(context, userItemList,getActivity());
到
getActivity()
将为您提供上下文
相应地更改适配器构造函数
使用ViewHolder
图案
public static class ViewHolder
{
TextView txtButton ;
}
在getView中
ViewHolder holder;
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.user_item_list, null);
holder.txtButton = (TextView) convertView.findViewById(R.id.button);
convertView.setTag(holder)
} else {
holder = (ViewHolder) convertView.getTag();
}
UserItem userItem = userItems.get(position);
String isContact = userItem.getIsContact();
if(isContact.equals("showed")) {
holder.txtButton .setVisibility(View.VISIBLE);
}else{
holder.txtButton .setVisibility(View.INVISIBLE);
}
return convertView;
你的if语句
if(isContact) { // makes no sense. isContact is not boolean
你可以改变这个
UserListAdapter adapter = new UserListAdapter(context, userItemList,getActivity());
到
getActivity()
将为您提供上下文
相应地更改适配器构造函数
使用ViewHolder
图案
public static class ViewHolder
{
TextView txtButton ;
}
在getView中
ViewHolder holder;
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.user_item_list, null);
holder.txtButton = (TextView) convertView.findViewById(R.id.button);
convertView.setTag(holder)
} else {
holder = (ViewHolder) convertView.getTag();
}
UserItem userItem = userItems.get(position);
String isContact = userItem.getIsContact();
if(isContact.equals("showed")) {
holder.txtButton .setVisibility(View.VISIBLE);
}else{
holder.txtButton .setVisibility(View.INVISIBLE);
}
return convertView;
你的if语句
if(isContact) { // makes no sense. isContact is not boolean
你可以改变这个
UserListAdapter adapter = new UserListAdapter(context, userItemList,getActivity());
到
getActivity()
将为您提供上下文
相应地更改适配器构造函数
使用ViewHolder
图案
public static class ViewHolder
{
TextView txtButton ;
}
在getView中
ViewHolder holder;
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.user_item_list, null);
holder.txtButton = (TextView) convertView.findViewById(R.id.button);
convertView.setTag(holder)
} else {
holder = (ViewHolder) convertView.getTag();
}
UserItem userItem = userItems.get(position);
String isContact = userItem.getIsContact();
if(isContact.equals("showed")) {
holder.txtButton .setVisibility(View.VISIBLE);
}else{
holder.txtButton .setVisibility(View.INVISIBLE);
}
return convertView;
你的if语句
if(isContact) { // makes no sense. isContact is not boolean
实现视图持有者模式并使用
.equals
比较字符串,您的if/else语句有点。。。在当前状态下无用发布整个适配器代码您有conertView,但按钮初始化在哪里?实现视图保持器模式并使用.equals
比较字符串您的if/else语句有点。。。在当前状态下无用发布整个适配器代码您有conertView,但按钮初始化在哪里?实现视图保持器模式并使用.equals
比较字符串您的if/else语句有点。。。在当前状态下无用发布整个适配器代码您有conertView,但按钮初始化在哪里?实现视图保持器模式并使用.equals
比较字符串您的if/else语句有点。。。在当前状态下无用发布整个适配器代码您有conertView,但按钮初始化在哪里?好的,找到了;)。谢谢,这帮了我很大的忙。好的,明白了;)。谢谢,这帮了我很大的忙。好的,明白了;)。谢谢,这帮了我很大的忙。好的,明白了;)。谢谢,这对我帮助很大。