how to save all check boxes values in arraylist or shareprefrence

Question

I have made four check boxes. when I check them true it should save in ArrayList. Can I save them to the array list? and also when I deselect them they should be removed from the list or ArrayList.i have implemented the checkboxes and also one select all button to select all checkboxes and one deselect button on deselect all the values of checkboxes should be removed from it.

My code is

public class SearchFragment extends BaseFragment {
private static final String TAG = null;
String[] name={ "Chicago", "Los Angeles", "Japan", "Europe"};
Object arr;
ArrayList<String> arrayList = new ArrayList<>();
TextView tv2
CheckBox abc,abc1,a,b,c;
public static SearchFragment newInstance () {
    return new SearchFragment();
}

@Override
public View onCreateView (LayoutInflater inflater, ViewGroup container,
                          Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_search, container, false);
    tv2=(TextView) view.findViewById(R.id.tv2);


    abc=(CheckBox) view.findViewById(R.id.abc);
    a=(CheckBox) view.findViewById(R.id.a);
    b=(CheckBox) view.findViewById(R.id.b);
    c=(CheckBox) view.findViewById(R.id.c);

    return view;
}

@Override
public void onViewCreated (View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    ButterKnife.bind(this, view);


    tv2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String value=tv2.getText().toString().trim();
            if (value.equals("Select all")){
                abc.setChecked(true);
                a.setChecked(true);
                b.setChecked(true);
                c.setChecked(true);
                tv2.setText("UnSelect all");
                arrayList.addAll(Arrays.asList(name));
                Log.e("SELECTED","SELECTED "+arrayList.size());
            }
            else {
                abc.setChecked(false);
                b.setChecked(false);
                a.setChecked(false);
                c.setChecked(false);

                tv2.setText("Select all");
                if (arrayList.size() != 0) {
                    arrayList.clear();

                }
                Log.e("NOT_SELECTED","NOT_SELECTED");
            }
       }
    });
    abc.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked){
                arrayList.addAll(Arrays.asList("Chicago"));
            }

        }
    });

public class SearchFragment extends BaseFragment { String[] name={ "Chicago", "Los Angeles", "Japan", "Europe"}; TextView tv2; CheckBox abc,a,b,c; public static SearchFragment newInstance () { return new SearchFragment(); } — Balwinder Singh, Mar 15 '18 at 09:56
@Override public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_search, container, false); tv2=(TextView) view.findViewById(R.id.tv2); abc=(CheckBox) view.findViewById(R.id.abc); a=(CheckBox) view.findViewById(R.id.a); b=(CheckBox) view.findViewById(R.id.b); c=(CheckBox) view.findViewById(R.id.c); return view; } — Balwinder Singh, Mar 15 '18 at 09:56

score 1 · Accepted Answer · edited Mar 15 '18 at 13:11

1

Use below code to add all of your checkBox data to ArrayList :

ArrayList<String> arrayList = new ArrayList<>();  

tv2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        String value=tv2.getText().toString().trim();
        if (value.equals("Select all")){
            abc.setChecked(true);
            a.setChecked(true);
            b.setChecked(true);
            c.setChecked(true);
            tv2.setText("Select all");


           //Adding data to ArrayList
           List arrList = Arrays.asList(name);
           arrayList.addAll(arrList);
           arrayList.addAll(Arrays.asList(arr));

           //or, Add data into ArrayList Manually
           arrayList.add("Chicago");
           arrayList.add("Los Angeles");
           arrayList.add("Japan");
           arrayList.add("Europe");

        }
        else {
            abc.setChecked(false);
            b.setChecked(false);
            a.setChecked(false);
            c.setChecked(false);

            tv2.setText("Select all");

            //Clear Data from ArrayList
            if(arrayList.size()!=0){
                 arrayList.clear
             }
        }

   }
});

Use Below code to Select & Remove :

tv2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        String value=tv2.getText().toString().trim();
        if (value.equals("Select all")){
            abc.setChecked(true);
            a.setChecked(true);
            b.setChecked(true);
            c.setChecked(true);
            tv2.setText("Remove all");
            arrayList.addAll(Arrays.asList(name));
            Log.e("SELECTED","SELECTED "+arrayList.size());
        }
        else {
            abc.setChecked(false);
            b.setChecked(false);
            a.setChecked(false);
            c.setChecked(false);

            tv2.setText("Select all");
            if (arrayList.size() != 0) {
                arrayList.clear();
            }
           Log.e("NOT_SELECTED","NOT_SELECTED");
        }
   }
});

Add Single Item As below :

Reference :

Code here :

abc.setOnClickListener(new OnClickListener() {

  @Override
  public void onClick(View v) {
            //is chkIos checked?
    if (((CheckBox) v).isChecked()) {
                    arrayList.add("Chicago");
    }
    else 
      // removes Chicago by arrayList Position
      //to avoid runtime exception
                    if(arrayList.contain("Chicago")){
                    arrayList.remove(0);
                    }else{
                   // do your stuff
                      }

  }
});

edited Mar 15 '18 at 13:11

Vishal Yadav

1,020
4
15
30

answered Mar 15 '18 at 10:17

Abhishek kumar

4,347
8
29
44

I'm getting crash on null pointer exception on arrayList.clear. java.lang.NullPointerException: Attempt to invoke virtual method 'void java.util.ArrayList.clear()' on a null object reference at com.sodick.view.fragments.SearchFragment$1.onClick(SearchFragment.java:96) – Balwinder Singh Mar 15 '18 at 10:31
When you have no data on ArrayList and you want to clear arrayList , then it will show you NullPointException. I made edit my answer now check. – Abhishek kumar Mar 15 '18 at 10:36
It Seems Correct put Log and check data , Is ArrayList getting the data of your array.@Shabnam – Abhishek kumar Mar 15 '18 at 10:51
i'm not getting data in log. can plaese help me in fixing this. – Balwinder Singh Mar 15 '18 at 11:00
Sorry , i forget to create ArryList Object , i edited my answer please check it and reply. – Abhishek kumar Mar 15 '18 at 11:08
java.lang.NullPointerException: storage == null at java.util.Arrays$ArrayList.(Arrays.java:38) at java.util.Arrays.asList(Arrays.java:155) at com.sodick.view.fragments.SearchFragment$1.onClick(SearchFragment.java:87) – Balwinder Singh Mar 15 '18 at 11:29
//or, Add data into ArrayList Manually use this lines of code and comment above code of adding data into ArrayList – Abhishek kumar Mar 15 '18 at 11:31
Add full code : //Adding data to ArrayList List arrList = Arrays.asList(name); arrayList.addAll(arrList); arrayList.addAll(Arrays.asList(arr)); – Abhishek kumar Mar 15 '18 at 11:33
now i'm getting all check boxes trure. but when i click on deselect all it is showing nothing. – Balwinder Singh Mar 15 '18 at 11:39
they are still selected checkboxes – Balwinder Singh Mar 15 '18 at 11:40
Actually your else part will not run @Shabnam as you code on if condition that will every time go to inside if . – Abhishek kumar Mar 15 '18 at 11:42
plaese check i have updated the new code . and plases tell me what changes i can do. – Balwinder Singh Mar 15 '18 at 11:44
I edited my answer check Use **Below code to Select & Remove :** and reply – Abhishek kumar Mar 15 '18 at 11:48
now just one question how can i print this in log . how can i see that my entries are going or slecting in arraylist. – Balwinder Singh Mar 15 '18 at 11:51
I edited my answer of **Below code to Select & Remove :** , Check and reply – Abhishek kumar Mar 15 '18 at 11:56
please one lat question.if i want select only 2 checkbox then it is not showing in logcat. when i select all then it is showing in arraylist. – Balwinder Singh Mar 15 '18 at 12:04
if i have selected only two check boxes then it is not saving in arraylist – Balwinder Singh Mar 15 '18 at 12:05
for that you have to add the code of that checkbox.setOn listner @Shabnam ,https://stackoverflow.com/questions/8386832/android-checkbox-listener – Abhishek kumar Mar 15 '18 at 12:07

score 1 · Answer 2 · answered Mar 15 '18 at 11:29

you are trying to access arrayList without initializing it. Use below code

public class SearchFragment extends BaseFragment {
String[] name={ "Chicago", "Los Angeles", "Japan", "Europe"};
Object arr;
ArrayList<String> arrayList = new ArrayList<>();
TextView tv2,tv3,tv4,tv5,tv6,tv7;
CheckBox 
abc,abc1,a,b,c,abc2,abc3,abc4,a1,a2,a3,a4,b1,b2,b3,b4,c1,c2,c3,c4;
public static SearchFragment newInstance () {
    return new SearchFragment();
}

@Override
public View onCreateView (LayoutInflater inflater, ViewGroup 
 container,
                      Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_search, container, 
false);
tv2=(TextView) view.findViewById(R.id.tv2);


abc=(CheckBox) view.findViewById(R.id.abc);
a=(CheckBox) view.findViewById(R.id.a);
b=(CheckBox) view.findViewById(R.id.b);
c=(CheckBox) view.findViewById(R.id.c);

return view;
}

@Override
public void onViewCreated (View view, @Nullable Bundle 
savedInstanceState) {
super.onViewCreated(view, savedInstanceState);

ButterKnife.bind(this, view);


tv2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        String value=tv2.getText().toString().trim();
        if (value.equals("Select all")){
            abc.setChecked(true);
            a.setChecked(true);
            b.setChecked(true);
            c.setChecked(true);
            tv2.setText("Clear All");

            arrayList.addAll(Arrays.asList(name));



        }
        else {
            abc.setChecked(false);
            b.setChecked(false);
            a.setChecked(false);
            c.setChecked(false);

            tv2.setText("Select all");
            arrayList.clear();
        }
   }
});
}}

yes it's working but when i clicked on deselect it still showing checked boxes nothing happened — Balwinder Singh, Mar 15 '18 at 11:41
when 1 time click on tv2 all checkboxes will be selected when 2 times click on tv2 all checkboxes will be unselected — KMI, Mar 15 '18 at 13:00

how to save all check boxes values in arraylist or shareprefrence

2 Answers2