android spinner dropdown checkbox

For that you have to Create Custom Adapter and set TextView and CheckBox inside that below way.

Define Spinner in xml

<Spinner        android:id="@+id/spinner"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_marginTop="10dp" />

Create spinner_item.xml file in layout folder.

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="wrap_content"    android:layout_height="wrap_content">    <TextView        android:id="@+id/text"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="20dp"        android:text="text"        android:textAlignment="gravity" />    <CheckBox        android:id="@+id/checkbox"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentEnd="true"        android:layout_alignParentRight="true" /></RelativeLayout>

Now create StateVO.java class that can contain the TextView and CheckBox value.

public class StateVO {    private String title;    private boolean selected;    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public boolean isSelected() {        return selected;    }    public void setSelected(boolean selected) {        this.selected = selected;    }}

Now in your Activity inititlize the Spinner and set CustomAdapter below way.

 final String[] select_qualification = {                "Select Qualification", "10th / Below", "12th", "Diploma", "UG",                "PG", "Phd"};        Spinner spinner = (Spinner) findViewById(R.id.spinner);        ArrayList<StateVO> listVOs = new ArrayList<>();        for (int i = 0; i < select_qualification.length; i++) {            StateVO stateVO = new StateVO();            stateVO.setTitle(select_qualification[i]);            stateVO.setSelected(false);            listVOs.add(stateVO);        }        MyAdapter myAdapter = new MyAdapter(Main2Activity.this, 0,                listVOs);        spinner.setAdapter(myAdapter);

And Finally Create CustomAdapter class like below way.

MyAdapter.java

public class MyAdapter extends ArrayAdapter<StateVO> {    private Context mContext;    private ArrayList<StateVO> listState;    private MyAdapter myAdapter;    private boolean isFromView = false;    public MyAdapter(Context context, int resource, List<StateVO> objects) {        super(context, resource, objects);        this.mContext = context;        this.listState = (ArrayList<StateVO>) objects;        this.myAdapter = this;    }    @Override    public View getDropDownView(int position, View convertView,                                ViewGroup parent) {        return getCustomView(position, convertView, parent);    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        return getCustomView(position, convertView, parent);    }    public View getCustomView(final int position, View convertView,                              ViewGroup parent) {        final ViewHolder holder;        if (convertView == null) {            LayoutInflater layoutInflator = LayoutInflater.from(mContext);            convertView = layoutInflator.inflate(R.layout.spinner_item, null);            holder = new ViewHolder();            holder.mTextView = (TextView) convertView                    .findViewById(R.id.text);            holder.mCheckBox = (CheckBox) convertView                    .findViewById(R.id.checkbox);            convertView.setTag(holder);        } else {            holder = (ViewHolder) convertView.getTag();        }        holder.mTextView.setText(listState.get(position).getTitle());        // To check weather checked event fire from getview() or user input        isFromView = true;        holder.mCheckBox.setChecked(listState.get(position).isSelected());        isFromView = false;        if ((position == 0)) {            holder.mCheckBox.setVisibility(View.INVISIBLE);        } else {            holder.mCheckBox.setVisibility(View.VISIBLE);        }        holder.mCheckBox.setTag(position);        holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                int getPosition = (Integer) buttonView.getTag();                if (!isFromView) {                    listState.get(position).setSelected(isChecked);                }            }        });        return convertView;    }    private class ViewHolder {        private TextView mTextView;        private CheckBox mCheckBox;    }}

Output :

This post is a great resource. For anyone interested, I made a generic adapter based on the other answer that has worked well for multiple data types. Also lets you click the text to toggle the checkbox.

public class CheckableSpinnerAdapter<T> extends BaseAdapter {    static class SpinnerItem<T> {        private String txt;        private T item;        SpinnerItem(T t, String s) {            item = t;            txt = s;        }    }    private Context context;    private Set<T> selected_items;    private List<SpinnerItem<T>> all_items;    private String headerText;    CheckableSpinnerAdapter(Context context,                            String headerText,                            List<SpinnerItem<T>> all_items,                            Set<T> selected_items) {        this.context = context;        this.headerText = headerText;        this.all_items = all_items;        this.selected_items = selected_items;    }    @Override    public int getCount() {        return all_items.size() + 1;    }    @Override    public Object getItem(int position) {        if( position < 1 ) {            return null;        }        else {            return all_items.get(position-1);        }    }    @Override    public long getItemId(int position) {        return 0;    }    @Override    @SuppressWarnings({"unchecked"})    @NonNull    public View getView(int position, View convertView, @NonNull ViewGroup parent) {        final ViewHolder holder;        if (convertView == null ) {            LayoutInflater layoutInflator = LayoutInflater.from(context);            convertView = layoutInflator.inflate(R.layout.checkable_spinner_item, parent, false);            holder = new ViewHolder();            holder.mTextView = convertView.findViewById(R.id.text);            holder.mCheckBox = convertView.findViewById(R.id.checkbox);            convertView.setTag(holder);        }        else {            holder = (ViewHolder) convertView.getTag();        }        if( position < 1 ) {            holder.mCheckBox.setVisibility(View.GONE);            holder.mTextView.setText(headerText);        }        else {            final int listPos = position - 1;            holder.mCheckBox.setVisibility(View.VISIBLE);            holder.mTextView.setText(all_items.get(listPos).txt);            final T item = all_items.get(listPos).item;            boolean isSel = selected_items.contains(item);            holder.mCheckBox.setOnCheckedChangeListener(null);            holder.mCheckBox.setChecked(isSel);            holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {                @Override                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                    if( isChecked ) {                        selected_items.add(item);                    }                    else {                        selected_items.remove(item);                    }                }            });            holder.mTextView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    holder.mCheckBox.toggle();                }            });        }        return convertView;    }    private class ViewHolder {        private TextView mTextView;        private CheckBox mCheckBox;    }} 

And the layout checkable_spinner_item.xml

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent">    <CheckBox        android:id="@+id/checkbox"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_margin="16dp"        app:layout_constraintStart_toStartOf="parent"        app:layout_constraintTop_toTopOf="@id/text"        app:layout_constraintBottom_toBottomOf="@id/text"/>    <TextView        android:id="@+id/text"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_marginStart="16dp"        android:layout_marginLeft="16dp"        android:layout_marginTop="8dp"        android:layout_marginBottom="8dp"        android:textSize="16sp"        android:textColor="#000000"        app:layout_constraintStart_toEndOf="@id/checkbox"        app:layout_constraintEnd_toEndOf="parent"        app:layout_constraintTop_toTopOf="parent"        app:layout_constraintBottom_toBottomOf="parent"        android:textAlignment="gravity" /></android.support.constraint.ConstraintLayout>

You would use it by creating a list of items to show, a Set, which will contain the selected items, and the header row text. For example:

private final List<CheckableSpinnerAdapter.SpinnerItem<MyObject>> spinner_items = new ArrayList<>();private final Set<MyObject> selected_items = new HashSet<>();@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    // fill the 'spinner_items' array with all items to show    List<MyObject> all_objects = getMyObjects(); // from wherever    for(MyObject o : all_objects) {        spinner_items.add(new CheckableSpinnerAdapter.SpinnerItem<>(o, o.getName()));    }    // to start with any pre-selected, add them to the `selected_items` set    String headerText = "Click an Item";    Spinner spinner = findViewById(R.id.my_spinner);    CheckableSpinnerAdapter adapter = new CheckableSpinnerAdapter<>(this, headerText, spinner_items, selected_items);    spinner.setAdapter(adapter);    // when you want to see what the user has selected, look in the `selected_items`    // set anywhere in your activity}

An example in use:

EDIT:MyObject can be any class or enum, whatever you want to associate with the spinner items. If you are copying this example directly it would have to implement a String getName() method. Here's a simple example:

class MyObject {    private String mName;    private String mAddr;    MyObject(String name, String address) {        mName = name;        mAddr = address;    }    String getName() { return mName; }    String getAddress() { return mAddr; }}