Android: Check multiple items ListView

Question

I am trying to implement multiple items selection in a ListView. The List is managed using the CursoAdapter. I was following the tutorials at http://developer.android.com/guide/topics/ui/menus.html#CAB. However, when I run the app, only 1 item is selected (highlighted). Can you point out, What am I doing wrong?

MainActivity.java

public class MainActivity extends ActionBarActivity {
DbHelper db;
ListView myList;
ActionMode mActionMode;
int checkedCount;
private static final String[] GENRES = new String[] {
        "Action", "Adventure", "Animation", "Children", "Comedy", "Documentary", "Drama",
        "Foreign", "History", "Independent", "Romance", "Sci-Fi", "Television", "Thriller"
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    db = new DbHelper(this);
    myList = (ListView) findViewById(R.id.newList);
    ArrayAdapter adapter = new ArrayAdapter(this,
            android.R.layout.simple_list_item_activated_1, GENRES);
    myList.setAdapter(adapter);

    loadData();

    myList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    myList.setItemsCanFocus(false);
    myList.setOnLongClickListener(new View.OnLongClickListener() {
        // Called when the user long-clicks on someView
        public boolean onLongClick(View view) {
            if (mActionMode != null) {

                return false;

            }

            // Start the CAB using the ActionMode.Callback defined above
        //    mActionMode = getActivity().startActionMode(mActionMode.Callback);

            view.setSelected(true);
            view.setBackgroundColor(25);
            return true;
        }
    });
    myList.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {

        @Override
        public void onItemCheckedStateChanged(ActionMode mode, int position,
                                              long id, boolean checked) {
            // Here you can do something when items are selected/de-selected,
            // such as update the title in the CAB
         //   Log.v(ListView.getCheckedItemPositions());
            if(checked)
            {
                checkedCount++;
            }
            else checkedCount--;
            mode.setTitle(checkedCount+" selected");
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            // Respond to clicks on the actions in the CAB
            switch (item.getItemId()) {
                case R.id.menu_delete:
                    //   deleteSelectedItems();
                    mode.finish(); // Action picked, so close the CAB
                    return true;
                default:
                    return false;
            }
        }

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            // Inflate the menu for the CAB
            menu.clear();
            checkedCount=0;
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate(R.menu.context_main, menu);
            return true;
        }


        public void onDestroyActionMode(ActionMode mode) {
            // Here you can make any necessary updates to the activity when
            // the CAB is removed. By default, selected items are deselected/unchecked.
        }


        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            // Here you can perform updates to the CAB due to
            // an invalidate() request
            return false;
        }
    });
}

public void onResume()
{
    super.onResume();
    loadData();
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    menu.clear();
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}
public void loadData()
{
    Cursor cursor = null;
    try {
        cursor = db.fetchData();
    }
    catch(NullPointerException e)
    {
        e.printStackTrace();
    }
    ListAdapter myAdapter = new SimpleCursorAdapter(this, R.layout.tasks,
            cursor,
            new String[]{db._ID, db.COLUMN_1, db.COLUMN_2},
            new int[]{R.id.idnum, R.id.c1, R.id.c2}, 0);
    myList.setAdapter(myAdapter);


}
public void addNew(View v)
{
    Intent intent = new Intent(this,AddActivity.class);
    startActivity(intent);

}
}

activity_main.xml

tasks.xml

menu_main.xml

Please comment if I need to add more details.

Edit: I looked at the duplicate question. However, majority of answers suggested using an ArrayAdapter, whereas items in my list are managed using SQLite, and each item consists of 3 separate items (no, text1, text2). How can I make use of an ArrayAdapter here? Also, one highly voted answer says to use CheckedTextView. So shall I use CheckedTextView for all the 3 parts of a list item?

Vishnu Prabhu · Accepted Answer

I have modified you code, added little changes. If you still have issues, please follow the sample in you sdk samples folder it will be in the following location.

sdks\samples\android-14\ApiDemos\src\com\example\android\apis\view\List16.java

        public class MainActivity extends ActionBarActivity {

            private static final String[] GENRES = new String[] {
                    "Action", "Adventure", "Animation", "Children", "Comedy", "Documentary", "Drama",![enter image description here][2]
                    "Foreign", "History", "Independent", "Romance", "Sci-Fi", "Television", "Thriller"
            };


            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
                ListView myList = (ListView) findViewById(R.id.newList);

    /**
     * the use of CHOICE_MODE_MULTIPLE_MODAL, a.k.a. selection mode on ListView
     * couple with the new simple_list_item_activated_1 which uses a highlighted    border for selected
     * items.
     */
                ArrayAdapter adapter = new ArrayAdapter(this,
                        android.R.layout.simple_list_item_activated_1, GENRES);
                myList.setAdapter(adapter);
                myList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
                myList.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {

                    @Override
                    public void onItemCheckedStateChanged(ActionMode mode, int position,
                            long id, boolean checked) {
                        // Here you can do something when items are selected/de-selected,
                        // such as update the title in the CAB
                    }

                    @Override
                    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
                        // Respond to clicks on the actions in the CAB
                        switch (item.getItemId()) {
                            case R.id.action_settings:
                                //   deleteSelectedItems();
                                mode.finish(); // Action picked, so close the CAB
                                return true;
                            default:
                                return false;
                        }
                    }

                    @Override
                    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
                        // Inflate the menu for the CAB
                        MenuInflater inflater = mode.getMenuInflater();
                        inflater.inflate(R.menu.menu_main, menu);
                        return true;
                    }


                    public void onDestroyActionMode(ActionMode mode) {
                        // Here you can make any necessary updates to the activity when
                        // the CAB is removed. By default, selected items are deselected/unchecked.
                    }


                    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
                        // Here you can perform updates to the CAB due to
                        // an invalidate() request
                        return false;
                    }
                });

            }
        }

![enter image description here][1]


menu_main.xml

    
        
    


activity_main.xml is same as your layout.

enter image description here

Android: Check multiple items ListView

Answers (2)

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