title: how to select all checkbox in custom listview from activity in android
body: <p>I have a custom listview which content two textview and one checkbox. When checkbox is checked then id is stored in the database and if unchecked then id is removed from database. But I want to select all checkboxes and store all ids into database or uncheck all checkboxes and remove all ids from database. What exactly i have to implement for this. please help me this is my adapter code </p>
  
  <pre><code>public class InviteListAdapter2 extends BaseAdapter implements OnClickListener {
  
  private static final String TAG = "GroupEditMemberListAdapter";
  
  private LayoutInflater inflater;
  private ViewHolder holder;
  private List&lt;FriendItem&gt; list;
  private Context context;
  private ImageLoader imageLoader;
  MessageSendingActivity msg = new MessageSendingActivity();
  private String groupId;
  SqliteHandle sqhandle;
  //private String adminId;
  int total_contacts=0;
  String f_id;
  int flag=0;
  String chetimeslot;
  ArrayList&lt;String&gt; currentList = new ArrayList&lt;String&gt;();
  public static final String DELETE_MEMBER = "2";
  public static final String ADD_MEMBER = "1";
  
  public InviteListAdapter2(Context context, List&lt;FriendItem&gt; list, String groupId, String adminId) {
      this.context = context;
      inflater = LayoutInflater.from(context);
      this.list = list;
      imageLoader = new ImageLoader(context);
      this.groupId = groupId;
      //this.adminId = adminId;
  }   
  
  public ArrayList&lt;String&gt; getChekedItem()
  {
      if(currentList!=null)
      return this.currentList;
      else return null;
  }
  @Override
  public int getCount() {
      return list.size();
  }
  
  @Override
  public Object getItem(int position) {
      return list.get(position);
  }
  
  @Override
  public long getItemId(int position) {
      return list.indexOf(getItem(position));
  }
  
  public void refresh(List&lt;FriendItem&gt; list) {
      this.list = list;
      notifyDataSetChanged();
  }
  
  public List&lt;FriendItem&gt; getList() {
      return list;
  }
  
  View hView;
  
  ArrayList&lt;CheckedItem&gt; checkbox_timeslot = new ArrayList&lt;CheckedItem&gt;();
  @Override
  public View getView(final int position, View convertView, ViewGroup parent) {
  
      hView = convertView;
  
      final FriendItem item = list.get(position);
  
      if (convertView == null) {
  
          holder = new ViewHolder();
  
          hView = inflater.inflate(R.layout.friendlistitem, null);
          holder.nameTextView         = (TextView) hView.findViewById(R.id.friend_name_text);
          holder.statusTextView       = (TextView) hView.findViewById(R.id.friend_count_text);
          holder.userImageView        = (ImageView) hView.findViewById(R.id.friend_image);
          holder.checkBox             = (CheckBox) hView.findViewById(R.id.chekbox);
  
          hView.setTag(holder);
      }
      else {
          holder = (ViewHolder) hView.getTag();
      }
  
      try {
              holder.nameTextView.setText(""+item.getName() + " " +item.getLname());
              holder.statusTextView.setText(""+item.getContacts());
  
              String path = "http://www.gbggoa.org/testproject/four/images/pic.jpg";
              path = Constant.URL  + item.getImage();
              imageLoader.displayImage(path, holder.userImageView);
  
              if(item.getId().equals(Sessions.getUserId(context)))
              {
                  holder.checkBox.setVisibility(View.GONE);
              }
              else
              {
                  holder.checkBox.setVisibility(View.VISIBLE);
              }
  
              if(item.isChecked())
              {
                  holder.checkBox.setChecked(true);
  
                  if(item.getId().equals(Sessions.getUserId(context)))
                  {
                      hView.setBackgroundResource(R.drawable.selector_list_gray);
                  }
                  else
                  {
                      hView.setBackgroundResource(R.drawable.selector_list_green);
                  }
              }
              else
              {
                  holder.checkBox.setChecked(false);
                  hView.setBackgroundResource(R.drawable.selector_list);
              }   
  
              holder.checkBox.setTag(position);
              holder.checkBox.setOnClickListener(this);
  
      } catch (Exception e) {
          e.printStackTrace();
      }
  
      return hView;
  }   
  
  class ViewHolder
  {   
      TextView nameTextView, statusTextView;
      ImageView userImageView;
      CheckBox checkBox;
  }
  
  protected void showToast(String message) {
      Toast.makeText(context, ""+message, Toast.LENGTH_SHORT).show();
  }
  
  protected void showToastLong(String message) {
      Toast.makeText(context, ""+message, Toast.LENGTH_LONG).show();
  }   
  
  @Override
  public void onClick(View view) {
  
      final int position = (Integer) view.getTag();
      String f_id=list.get(position).getId();
      final CheckBox checkBox = (CheckBox) view.findViewById(R.id.chekbox);
      sqhandle=new SqliteHandle(context); 
      final boolean isChecked = checkBox.isChecked();
      int total=sqhandle.getCheckedCount();                       
      checkBox.setVisibility(View.GONE);
      if(isChecked)
      {
          total_contacts = total_contacts + Integer.parseInt(list.get(position).getContacts());
          sqhandle.changeCheck("1", f_id);
          Toast.makeText(context, "Selected Contacts: "+total_contacts, Toast.LENGTH_LONG).show();
  
      }
      else
      {
          sqhandle.changeCheck("0", f_id);
          total_contacts = total_contacts - Integer.parseInt(list.get(position).getContacts());
          Toast.makeText(context, "Selected Contacts: "+total_contacts, Toast.LENGTH_LONG).show();
      }
      sqhandle.close();
      checkBox.setVisibility(View.VISIBLE);
      list.get(position).setChecked(isChecked);
      notifyDataSetChanged();
  
  }
  
  
  }   
  </code></pre>