title: how to select all check box by selecting one
body: <p>i have select all contact check box, by selecting this  i want to get all below contact in phone list selected, how can i do that ?/</p>
  
  <p>can anyone please help</p>
  
  <p>i have working below code for single contact select i want to select all 
  pleases see the view of app below</p>
  
  <p><a href="https://i.stack.imgur.com/t48fA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t48fA.png" alt="enter image description here"></a>
  code for single select single check box working </p>
  
  <pre><code>  listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  
                      @Override
                      public void onItemClick(AdapterView&lt;?&gt; parent,
                                              View view, int position, long id) {
  
                          CheckBox chk = (CheckBox) view
                                  .findViewById(R.id.contactcheck);
                          ContactObject bean = ContactsListClass.phoneList
                                  .get(position);
                          if (bean.isSelected()) {
                              bean.setSelected(false);
                              chk.setChecked(false);
  
                          } else {
                              bean.setSelected(true);
                              chk.setChecked(true);
  
  
                          }
  
                      }
                  });
  </code></pre>
  
  <p>main code</p>
  
  <pre><code>  public class TabFragment1 extends Fragment implements CallBack {
  
  Context context = null;
  ContactsAdapter objAdapter;
  private ArrayList&lt;ContactObject&gt; contactList = new ArrayList&lt;ContactObject&gt;();
  private ListView listView;
  private ContactsAdapter adapter;
  private Button doneBtn , sendBtn;
  ProgressDialog pDialog;
  TextView buttonAdd;
  LinearLayout container;
  HorizontalScrollView mHorizontalScrollView;
  EditText  textIn;
  ContactObject mContactObject;
  CallBack mCallBack;
  ToggleButton toggleButton;
  CheckBox select_all;
  private ArrayAdapter arrayAdapter;
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  //        return super.onCreateView(inflater, container, savedInstanceState);
      return inflater.inflate(R.layout.activity_main, container, false);
  
  
  }
  
  @Override
  public void onViewCreated(View view, Bundle savedInstanceState) {
      super.onViewCreated(view, savedInstanceState);
  
      context = getActivity();
      mCallBack = this;
      pDialog = new ProgressDialog(context);
      pDialog.setMessage("Loading...");
      pDialog.show();
      listView =(ListView) view.findViewById(R.id.list);
  //       totalSmsCount = (TextView) view.findViewById(R.id.TotalMsgSent);
      sendBtn = (Button) view.findViewById(R.id.submitBtn);
  //        totalSmsCount.setText("Total message sent 100/1000");
      mHorizontalScrollView = (HorizontalScrollView)view.findViewById(R.id.container);
      container = (LinearLayout)view.findViewById(R.id.linearcontainer);
      textIn = (EditText)view.findViewById(R.id.textin);
      buttonAdd = (Button)view.findViewById(R.id.add);
      select_all = (CheckBox) view.findViewById(R.id.chkall);
    //  toggleButton=(ToggleButton)view.findViewById(R.id.toggleButton);
  
  
      addContactsInList();
  
      buttonAdd.setOnClickListener(new View.OnClickListener(){
  
          @Override
          public void onClick(View arg0) {
  
              String msg1 = textIn.getText().toString().trim();
              if (!msg1.equals("") &amp;&amp; msg1.length() == 10) {
  
                  LayoutInflater layoutInflater =
                          (LayoutInflater)getActivity().getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                  final View addView = layoutInflater.inflate(R.layout.add_contact, null);
                  TextView textOut = (TextView)addView.findViewById(R.id.textout);
                  textOut.setText(textIn.getText().toString().trim());
  
                  Button buttonRemove = (Button)addView.findViewById(R.id.remove);
                  buttonRemove.setOnClickListener(new View.OnClickListener() {
  
                      @Override
                      public void onClick(View v) {
                          ((LinearLayout) addView.getParent()).removeView(addView);
                          TextView textOut = (TextView)addView.findViewById(R.id.textout);
  
  
                          for (ContactObject bean : ContactsListClass.manualList) {
                              Log.e("remove","bean.getNumber()="+bean.getNumber());
                              Log.e("remove","TextView.getNumber()="+textOut.getText().toString());
  
                              String str1= bean.getNumber();
                              String str2= textOut.getText().toString();
                              if(str1.equals(str2))
                             {
                                 Log.e("remove","Before="+ContactsListClass.manualList.size());
                                 Log.e("remove", bean.getNumber());
                                 ContactsListClass.manualList.remove(bean);
                                 Log.e("remove", "After=" + ContactsListClass.manualList.size());
                                 break;
                             }
  
  
                          }
  
                      }
                  });
  
                  container.addView(addView);
  
                  mContactObject = new ContactObject();
                  mContactObject.setNumber(textIn.getText().toString().trim());
                  mContactObject.setName("");
                  ContactsListClass.manualList.add(mContactObject);
                  textIn.setText("");
                  mHorizontalScrollView.postDelayed(new Runnable() {
                      public void run() {
                          mHorizontalScrollView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
                      }
                  }, 100L);
  
              } else {
  
                  new AlertDialog.Builder(context)
                          .setTitle("Alert")
                          .setMessage("Enter valid number.")
                          .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                              public void onClick(DialogInterface dialog, int which) {
                                  // continue with delete
  
                              }
                          })
  
                          .setIcon(android.R.drawable.ic_dialog_alert)
                          .show();
              }
  
          }});
      sendBtn.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
              Log.i("Selected contact","size="+ ContactsListClass.phoneList.size());
  
                  StringBuffer sb = new StringBuffer();
  
                  for (ContactObject bean : ContactsListClass.phoneList) {
  
                      if (bean.isSelected()) {
                          sb.append(bean.getName());
                          sb.append(",");
  
                          Log.i("Selected contact", sb.toString());
                          contactList.add(bean);
  
  
                      }
                  }
              for (ContactObject bean : ContactsListClass.manualList) {
  
  
                      contactList.add(bean);
  
              }
              if( contactList.size() &gt; 0  ) {
                  container.removeAllViews();
                  Intent i = new Intent(context, WriteMessage.class);
  //                i.putExtra("Contact_list",  contactList);
                  context.startActivity(i);
              }else{
  
                  new AlertDialog.Builder(context)
                          .setTitle("No Contact")
                          .setMessage("Please select atleast one contact.")
                          .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                              public void onClick(DialogInterface dialog, int which) {
                                  // continue with delete
                              }
                          })
                          .setIcon(android.R.drawable.ic_dialog_alert)
                          .show();
              }
  
          }
      });
  
  }
  
  @Override
  public void onResume() {
      super.onResume();
      contactList.clear();
      if(objAdapter!= null) {
          objAdapter.notifyDataSetChanged();
      }
      for (ContactObject bean : ContactsListClass.manualList) {
  
          LayoutInflater layoutInflater =
                  (LayoutInflater)getActivity().getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          final View addView = layoutInflater.inflate(R.layout.add_contact, null);
          TextView textOut = (TextView)addView.findViewById(R.id.textout);
          textOut.setText(bean.getNumber());
  
          Button buttonRemove = (Button)addView.findViewById(R.id.remove);
          buttonRemove.setOnClickListener(new View.OnClickListener() {
  
              @Override
              public void onClick(View v) {
                  ((LinearLayout) addView.getParent()).removeView(addView);
                  TextView textOut = (TextView) addView.findViewById(R.id.textout);
  
  
                  for (ContactObject bean : ContactsListClass.manualList) {
                      Log.e("remove", "bean.getNumber()=" + bean.getNumber());
                      Log.e("remove", "TextView.getNumber()=" + textOut.getText().toString());
  
                      String str1 = bean.getNumber();
                      String str2 = textOut.getText().toString();
                      if (str1.equals(str2)) {
                          Log.e("remove", "Before=" + ContactsListClass.manualList.size());
                          Log.e("remove", bean.getNumber());
                          ContactsListClass.manualList.remove(bean);
                          Log.e("remove", "After=" + ContactsListClass.manualList.size());
                          break;
                      }
  
  
                  }
  
              }
          });
  
          container.addView(addView);
  
  
  
  
      }
      mHorizontalScrollView.postDelayed(new Runnable() {
          public void run() {
              mHorizontalScrollView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
          }
      }, 100L);
  }
  
  
  
  private void getSelectedContacts() {
      // TODO Auto-generated method stub
  
      StringBuffer sb = new StringBuffer();
  
      for (ContactObject bean : ContactsListClass.phoneList) {
  
          if (bean.isSelected()) {
              sb.append(bean.getName());
              sb.append(",");
          }
      }
  
      String s = sb.toString().trim();
  
      if (TextUtils.isEmpty(s)) {
          Toast.makeText(context, "Select atleast one Contact",
                  Toast.LENGTH_SHORT).show();
      } else {
  
          s = s.substring(0, s.length() - 1);
          Toast.makeText(context, "Selected Contacts : " + s,
                  Toast.LENGTH_SHORT).show();
  
      }
  
  }
  
  private void addContactsInList() {
      // TODO Auto-generated method stub
  
      Thread thread = new Thread() {
          @Override
          public void run() {
  
              showPB();
  
              try {
  //                    ActivityCompat.requestPermissions(getActivity(),new String[]{Manifest.permission.READ_CONTACTS},1);
                  Cursor phones = getActivity().getContentResolver().query(
                          ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                          null, null, null, null);
  
                  try {
                      ContactsListClass.phoneList.clear();
                  } catch (Exception e) {
  
                  }
  
                  while (phones.moveToNext()) {
                      String phoneName = phones
                              .getString(phones
                                              .getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                      String phoneNumber = phones
                              .getString(phones
                                      .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
  .getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID));
  
                      String phoneImage = phones.getString(phones.getColumnIndex(ContactsContract.Contacts.PHOTO_URI));
  
  
                      ContactObject cp = new ContactObject();
  
  
  
                      cp.setName(phoneName);
                      cp.setNumber(phoneNumber);
                      cp.setImage(phoneImage);
  
                      ContactsListClass.phoneList.add(cp);
  
                  }
                  phones.close();
  
  
  
                  getActivity().runOnUiThread(new Runnable() {
                      @Override
                      public void run() {
                          // TODO Auto-generated method stub
   //                            llContainer.addView(lv);
                          objAdapter = new ContactsAdapter(getActivity(),
                                  ContactsListClass.phoneList,mCallBack);
                          listView.setAdapter(objAdapter);
                          objAdapter.notifyDataSetChanged();
                          pDialog.hide();
                      }
                  });
  
                  Collections.sort(ContactsListClass.phoneList,
                          new Comparator&lt;ContactObject&gt;() {
                              @Override
                              public int compare(ContactObject lhs,
                                                 ContactObject rhs) {
                                  return lhs.getName().compareTo(
                                          rhs.getName());
                              }
                          });
  
  
  
                  listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  
                      @Override
                      public void onItemClick(AdapterView&lt;?&gt; parent,
                                              View view, int position, long id) {
  
                          CheckBox chk = (CheckBox) view
                                  .findViewById(R.id.contactcheck);
                          ContactObject bean = ContactsListClass.phoneList
                                  .get(position);
                          if (bean.isSelected()) {
                              bean.setSelected(false);
                              chk.setChecked(false);
  
                          } else {
                              bean.setSelected(true);
                              chk.setChecked(true);
  
  
                          }
  
                      }
                  });
  
  
              } catch (Exception e) {
  
                  e.printStackTrace();
  
              }
  
              hidePB();
  
          }
      };
      thread.start();
  
  }
  
  void showPB() {
      getActivity().runOnUiThread(new Runnable() {
          @Override
          public void run() {
              // TODO Auto-generated method stub
          }
      });
  }
  
  void hidePB() {
      getActivity().runOnUiThread(new Runnable() {
          @Override
          public void run() {
              // TODO Auto-generated method stub
          }
      });
  }
  public void onEventCheck(ContactObject mContactObject)
  {
      setContact(mContactObject);
  }
  void setContact(ContactObject mContactObject)
  {
      Log.e("remove","inside setContact");
      LayoutInflater layoutInflater =
              (LayoutInflater)getActivity().getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      final View addView = layoutInflater.inflate(R.layout.add_contact, null);
      TextView textOut = (TextView)addView.findViewById(R.id.textout);
      textOut.setText(mContactObject.getNumber());
  
      Button buttonRemove = (Button)addView.findViewById(R.id.remove);
      buttonRemove.setOnClickListener(new View.OnClickListener() {
  
          @Override
          public void onClick(View v) {
              ((LinearLayout) addView.getParent()).removeView(addView);
              TextView textOut = (TextView)addView.findViewById(R.id.textout);
  
  
              for (ContactObject bean : ContactsListClass.manualList) {
                  Log.e("remove","bean.getNumber()="+bean.getNumber());
                  Log.e("remove","TextView.getNumber()="+textOut.getText().toString());
  
                  String str1= bean.getNumber();
                  String str2= textOut.getText().toString();
                  if(str1.equals(str2))
                  {
                      Log.e("remove","Before="+ContactsListClass.manualList.size());
                      Log.e("remove", bean.getNumber());
                      ContactsListClass.manualList.remove(bean);
                      Log.e("remove", "After=" + ContactsListClass.manualList.size());
                      break;
                  }
  
  
              }
  
          }
      });
  
      container.addView(addView);
      mHorizontalScrollView.postDelayed(new Runnable() {
          public void run() {
              mHorizontalScrollView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
          }
      }, 100L);
  
  }
  
  }
  </code></pre>