CODEWITHSUNDEEP
androidandroid-layoutlistview
Muhammed Misir
Muhammed Misir

Reputation: 481

Add item in a ListView

I have a Activity that's creating a Check list, if I close the activity with back Button the list is saved in a Database.

The list from the Database is used as the MainActivity content.

This is how my app will look:

enter image description here

If I press the List Item button, a new element should be added to the list. How can I add and sisplay a new Item (Layout with Checkbox and EditText)?

Do I need an Adapter? I don't want the 'list item' part repeated.

enter image description here

That looks so after i press 4 times

Upvotes: 1

Views: 8205

Answers (2)

Nick Cardoso
Nick Cardoso

Reputation: 21733

Activity

private ArrayAdapter mAdapter;

onCreate

ListView lv = (ListView) findViewById(R.id.my_list);
List<String> initialList = new ArrayList<String>(); //load these 
mAdapter = new ArrayAdapter(this, android.R.id.text1, initialList)
lv.setadapter(mAdapter);

When the event happens

mAdapter.add(newString);

The add method in ArrayAdpater will automatically take care of the notifyDataSetChanged() call for you and update the display.

TextWatcher you might not need this part, it's if you want the text added as soon as the text is changed which your question seems to indicate - that is risky because you might get partial entries, so i recommend a done button instead, in which case you just do the afterTextChanged stuff in the onClick method.

EditText editText = (EditText) findViewById(R.id.my_edit_text); 
editText .addTextChangedListener(new TextWatcher(){

        @Override
        public void afterTextChanged(Editable arg0) {

            //TODO: check it isnt emtpy 
            String text = arg0.getText().toString();
            mAdapter.add(text); 

            //Hide the add item views again
            arg0.setText("");
            arg0.setVisibility(View.GONE);


        }

        @Override
        public void beforeTextChanged(CharSequence arg0, int arg1,
                int arg2, int arg3) { /*nothing*/ }

        @Override
        public void onTextChanged(CharSequence arg0, int arg1, int arg2,
                int arg3) { /*nothing*/ }


 });

Upvotes: 2

Masum
Masum

Reputation: 4959

You can add plus button in your list as footerview as your image then new item add in your arraylist by the action(onClicklistener) of footer view button then call youradapter.notifyDataSetChanged().

Upvotes: 0

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