对象未从列表onCheckedChange监听器复选框中删除 [英] object is not getting removed from list onCheckedChange listener of check box
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问题描述
我有一个联系人列表。我有一个复选框来选择联系人。这些选择的联系人我想添加在另一个名为邀请数组列表的列表中。我已创建一个方法来添加邀请列表中的所有联系人（如果选中了作为toogleContactsSelection调用的复选框）。
如果选中了复选框，我已创建了另一种在邀请函数列表中添加联系人的方法。
现在，如果未选中复选框，则要从邀请数组列表中删除该对象，即复选框的onCheckChangeListener。
但是对象未被删除invitationArrayList。
适配器：
public class InviteAdapter extends RecyclerView.Adapter ; InviteAdapter.MyViewHolder> {
私有ArrayList< Contact> contactArrayList;
private Context mContext;
public ArrayList< Invitation> invitationArrayList = new ArrayList<>（）;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView name;
private CheckBox checkBox;
public MyViewHolder（View view）{
super（view）;
name =（TextView）view.findViewById（R.id.textContactName）;
checkBox =（CheckBox）view.findViewById（R.id.checkBox）;
}
}
public InviteAdapter（Context context，ArrayList< Contact> contactArrayList）{
this.contactArrayList = contactArrayList;
this.mContext = context;
}
@Override
public MyViewHolder onCreateViewHolder（ViewGroup parent，int viewType）{
查看itemView = LayoutInflater.from（parent.getContext ）
.inflate（R.layout.invite_contact_item，parent，false）;
return new MyViewHolder（itemView）;
}
@Override
public void onBindViewHolder（MyViewHolder holder，final int position）{
final Contact contact = contactArrayList.get（position）;
holder.name.setText（contact.getmFullName（））;
holder.checkBox.setChecked（contact.getSelected（））;
holder.checkBox.setOnCheckedChangeListener（new CompoundButton.OnCheckedChangeListener（）{
@Override
public void onCheckedChanged（CompoundButton compoundButton，boolean b）{
if（b）
{
invite（contact）;
Log.e（inviteList，String.valueOf（invitationArrayList.size（）））;
}
else {
invitationArrayList.remove（contact）;
Log.e（inviteList，String.valueOf（invitationArrayList.size（）））;
}
}
}）;
}
@Override
public int getItemCount（）{
return contactArrayList.size（）;
}
public void toggleContactsSelection（boolean isSelected）{
for（Contact contact：contactArrayList）{
contact.setSelected（isSelected）;
邀请（联系）;
}
notifyDataSetChanged（）; //或者你可以使用notifyItemRangeChanged - 它适合你的需要
}
public void invite（联系人联系人）
{
SharedPreferences sharedpreferences = mContext .getSharedPreferences（UserId，Context.MODE_PRIVATE）;
String mUserId = sharedpreferences.getString（userId，）;
DateFormat df = new SimpleDateFormat（EEE，d MMM yyyy，HH：mm，Locale.ENGLISH）;
String date = df.format（Calendar.getInstance（）。getTime（））;
邀请邀请=新邀请（）;
invitation.setSender_id（mUserId）;
invitation.setDate（date）;
invitation.setInvitee_no（contact.getmMobileNo（））;
invitation.setStatus（0）;
invitation.setUser_name（contact.getmUserName（））;
invitationArrayList.add（invitation）;
}
public void removeInvite（int position）
{
invitationArrayList.remove（position）;
}
public ArrayList< Invitation> getArrayList（）{
return invitationArrayList;
}
}
出了什么问题？
编辑：
这是一个adpater：
public class InviteAdapter extends RecyclerView.Adapter< InviteAdapter.MyViewHolder> {
private ArrayList< Contact> contactArrayList;
private Context mContext;
public ArrayList< Invitation> invitationArrayList = new ArrayList<>（）;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView name;
private CheckBox checkBox;
public MyViewHolder（View view）{
super（view）;
name =（TextView）view.findViewById（R.id.textContactName）;
checkBox =（CheckBox）view.findViewById（R.id.checkBox）;
}
}
public InviteAdapter（Context context，ArrayList< Contact> contactArrayList）{
this.contactArrayList = contactArrayList;
this.mContext = context;
}
@Override
public MyViewHolder onCreateViewHolder（ViewGroup parent，int viewType）{
查看itemView = LayoutInflater.from（parent.getContext ）
.inflate（R.layout.invite_contact_item，parent，false）;
return new MyViewHolder（itemView）;
}
@Override
public void onBindViewHolder（final MyViewHolder holder，final int position）{
final Contact contact = contactArrayList.get（holder.getAdapterPosition（）） ;
holder.name.setText（contact.getmFullName（））;
holder.checkBox.setChecked（contact.getSelected（））;
holder.checkBox.setOnCheckedChangeListener（new CompoundButton.OnCheckedChangeListener（）{
@Override
public void onCheckedChanged（CompoundButton compoundButton，boolean b）{
if（b）
{
invite（contact）;
Log.e（inviteList，String.valueOf（invitationArrayList.size（）））;
}
else {
contactArrayList.get（position）.setSelected（false）;
// holder.checkBox.setChecked（false）;
// updateInvites ）;
Log.e（inviteList，String.valueOf（invitationArrayList.size（）））;
}
}
}
}
@Override
public int getItemCount（）{
return contactArrayList.size（）;
}
public void setChecked（）
{
for（Contact contact：contactArrayList）{
}
}
public void toggleContactsSelection（boolean isSelected）{
for（Contact contact：contactArrayList）{
contact.setSelected（isSelected）;
邀请（联系）;
}
notifyDataSetChanged（）; //或者你可以使用notifyItemRangeChanged - 它适合你的需要
}
public void invite（联系人联系人）
{
邀请邀请= new邀请（）;
SharedPreferences sharedpreferences = mContext.getSharedPreferences（UserId，Context.MODE_PRIVATE）;
String mUserId = sharedpreferences.getString（userId，）;
DateFormat df = new SimpleDateFormat（EEE，d MMM yyyy，HH：mm，Locale.ENGLISH）;
String date = df.format（Calendar.getInstance（）。getTime（））;
invitation.setSender_id（mUserId）;
invitation.setDate（date）;
invitation.setInvitee_no（contact.getmMobileNo（））;
invitation.setStatus（0）;
invitation.setUser_name（contact.getmUserName（））;
invitation.setContact_id（contact.getContactId（））;
invitationArrayList.add（invitation）;
}
public ArrayList< Invitation> getArrayList（）{
return inviteArrayList;
}
public void updateInvites（）{
invitationArrayList.clear（）;
for（联系人联系人：contactArrayList）{
if（contact.getSelected（））{
invite（contact）;
}
}
}
}
这里是一个活动的代码：
sendInvites.setOnClickListener（new View.OnClickListener（）{
@Override
public void onClick（View view）{
mAdapter.updateInvites（）; //更新sendInvites上的列表，
invitationArrayList = mAdapter.getArrayList（）;
Log.e（inviteList，String.valueOf（invitationArrayList.size（）））;
Gson gson = new Gson（）;
String toServer = gson.toJson （
Collections.singletonMap（invitations，invitationArrayList）
）;
new SendMultipleInvitesAsyncTask（InviteContactsActivity.this，InviteContactsActivity.this）.execute（toServer）;
finish（）;
Intent i = new Intent（InviteContactsActivity.this，InviteContactsActivity.class）;
i.addFlags（Intent.FLAG_ACTIVITY_NO_ANIMATION）;
startActivity（i）;
}
}）;
现在我更新列表onSendInvites，但是当我选中或取消选中api时， 。
解决方案
确定，所以我说的几个蠢错误，
a。替换
final Contact contact = contactArrayList.get（position）;
final联系contact = contactArrayList.get（holder.getAdapterPosition（））;
b。您正在添加邀请对象
邀请邀请=新邀请）;
invitation.setSender_id（mUserId）;
invitation.setDate（date）;
invitation.setInvitee_no（contact.getmMobileNo（））;
invitation.setStatus（0）;
invitation.setUser_name（contact.getmUserName（））;
invitationArrayList.add（invitation）;
c。您尝试删除联系人
else {
invitationArrayList.remove（contact）;
Log.e（inviteList，String.valueOf（invitationArrayList.size（）））;
}
解决方案
在onBindViewHolder
holder.checkBox.setOnCheckedChangeListener（new CompoundButton.OnCheckedChangeListener（）{
@Override
public void onCheckedChanged（CompoundButton compoundButton，boolean b）{
contactArrayList.get（holder.getAdapterPosition（））。setSelected（b）;
Log.e（inviteList，String .valueOf（invitationArrayList.size（）））;
}
}）;
然后使用类似
的方法 private void updateInvites（）{
invitationArrayList.clear（）;
（联系人联系人：contactsArrayList）{
if（contacts.isSelected（））{
invite（contact）;
}
}
}
contact.setSeletected（boolean status）和contact.isSelected（）分别是setter和getter
编辑：
这里是我的博客在RecyclerView的链接，解释了Simple RecyclerView的大部分概念。
I have a list of contacts. I have a check box to select the contacts. These selected contacts I want to add in another list called invitation array list. I have created a method to add all contacts in invitation list if check box is selected called as toogleContactsSelection. This I am using in an activity.
I have created another method to add contacts in invitation arraylist if check box is selected.
Now I want to remove the object from an invitation array list if check box is unchecked i.e onCheckChangeListener of check box.
But object is not getting removed from invitationArrayList.
Adapter:
public class InviteAdapter extends RecyclerView.Adapter<InviteAdapter.MyViewHolder> {
private ArrayList<Contact> contactArrayList;
private Context mContext;
public ArrayList<Invitation> invitationArrayList = new ArrayList<>();
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView name;
private CheckBox checkBox;
public MyViewHolder(View view) {
super(view);
name = (TextView) view.findViewById(R.id.textContactName);
checkBox = (CheckBox) view.findViewById(R.id.checkBox);
}
}
public InviteAdapter(Context context, ArrayList<Contact> contactArrayList) {
this.contactArrayList = contactArrayList;
this.mContext = context;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.invite_contact_item, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
final Contact contact = contactArrayList.get(position);
holder.name.setText(contact.getmFullName());
holder.checkBox.setChecked(contact.getSelected());
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if(b)
{
invite(contact);
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
}
else {
invitationArrayList.remove(contact);
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
}
}
});
}
@Override
public int getItemCount() {
return contactArrayList.size();
}
public void toggleContactsSelection( boolean isSelected ) {
for( Contact contact : contactArrayList ) {
contact.setSelected(isSelected);
invite(contact);
}
notifyDataSetChanged(); // OR you can use notifyItemRangeChanged - which ever suits your needs
}
public void invite(Contact contact)
{
SharedPreferences sharedpreferences = mContext.getSharedPreferences("UserId", Context.MODE_PRIVATE);
String mUserId = sharedpreferences.getString("userId","");
DateFormat df = new SimpleDateFormat("EEE, d MMM yyyy, HH:mm", Locale.ENGLISH);
String date = df.format(Calendar.getInstance().getTime());
Invitation invitation = new Invitation();
invitation.setSender_id(mUserId);
invitation.setDate(date);
invitation.setInvitee_no(contact.getmMobileNo());
invitation.setStatus("0");
invitation.setUser_name(contact.getmUserName());
invitationArrayList.add(invitation);
}
public void removeInvite(int position)
{
invitationArrayList.remove(position);
}
public ArrayList<Invitation> getArrayList(){
return invitationArrayList;
}
}
What is going wrong?
EDIT:
This is an adpater :
public class InviteAdapter extends RecyclerView.Adapter<InviteAdapter.MyViewHolder> {
private ArrayList<Contact> contactArrayList;
private Context mContext;
public ArrayList<Invitation> invitationArrayList = new ArrayList<>();
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView name;
private CheckBox checkBox;
public MyViewHolder(View view) {
super(view);
name = (TextView) view.findViewById(R.id.textContactName);
checkBox = (CheckBox) view.findViewById(R.id.checkBox);
}
}
public InviteAdapter(Context context, ArrayList<Contact> contactArrayList) {
this.contactArrayList = contactArrayList;
this.mContext = context;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.invite_contact_item, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) {
final Contact contact = contactArrayList.get(holder.getAdapterPosition());
holder.name.setText(contact.getmFullName());
holder.checkBox.setChecked(contact.getSelected());
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if(b)
{
invite(contact);
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
}
else {
contactArrayList.get(position).setSelected(false);
// holder.checkBox.setChecked(false);
// updateInvites();
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
}
}
});
}
@Override
public int getItemCount() {
return contactArrayList.size();
}
public void setChecked()
{
for( Contact contact : contactArrayList ) {
}
}
public void toggleContactsSelection( boolean isSelected ) {
for( Contact contact : contactArrayList ) {
contact.setSelected(isSelected);
invite(contact);
}
notifyDataSetChanged(); // OR you can use notifyItemRangeChanged - which ever suits your needs
}
public void invite(Contact contact)
{
Invitation invitation = new Invitation();
SharedPreferences sharedpreferences = mContext.getSharedPreferences("UserId", Context.MODE_PRIVATE);
String mUserId = sharedpreferences.getString("userId", "");
DateFormat df = new SimpleDateFormat("EEE, d MMM yyyy, HH:mm", Locale.ENGLISH);
String date = df.format(Calendar.getInstance().getTime());
invitation.setSender_id(mUserId);
invitation.setDate(date);
invitation.setInvitee_no(contact.getmMobileNo());
invitation.setStatus("0");
invitation.setUser_name(contact.getmUserName());
invitation.setContact_id(contact.getContactId());
invitationArrayList.add(invitation);
}
public ArrayList<Invitation> getArrayList(){
return invitationArrayList;
}
public void updateInvites(){
invitationArrayList.clear();
for(Contact contact : contactArrayList){
if(contact.getSelected()){
invite(contact);
}
}
}
}
And here is an activity's code:
sendInvites.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mAdapter.updateInvites(); // updating list on sendInvites,
invitationArrayList = mAdapter.getArrayList();
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
Gson gson = new Gson();
String toServer = gson.toJson(
Collections.singletonMap("invitations", invitationArrayList)
);
new SendMultipleInvitesAsyncTask(InviteContactsActivity.this,InviteContactsActivity.this).execute(toServer);
finish();
Intent i = new Intent(InviteContactsActivity.this,InviteContactsActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(i);
}
});
Now I am updating list onSendInvites, but when I check or uncheck the api it dose not behave as expected.
解决方案
OK, so there are few silly mistakes I say,
a. Replace
final Contact contact = contactArrayList.get(position);
with
final Contact contact = contactArrayList.get(holder.getAdapterPosition());
b. You are adding Object of Class Invitation
Invitation invitation = new Invitation();
invitation.setSender_id(mUserId);
invitation.setDate(date);
invitation.setInvitee_no(contact.getmMobileNo());
invitation.setStatus("0");
invitation.setUser_name(contact.getmUserName());
invitationArrayList.add(invitation);
c. You are trying to remove object of Class Contacts
else {
invitationArrayList.remove(contact);
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
}
Solution
in onBindViewHolder
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
contactArrayList.get(holder.getAdapterPosition()).setSelected(b);
Log.e("inviteList",String.valueOf(invitationArrayList.size()));
}
});
then make a method like
private void updateInvites(){
invitationArrayList.clear();
for(Contacts contacts : contactsArrayList){
if(contacts.isSelected()){
invite(contact);
}
}
}
here
contact.setSeletected(boolean status)andcontact.isSelected()are setters and getters respectively
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