Question

I have a custom ListView which contains one TextView (Of numbers) and one EditText in a row. Outside the heading I have a TextView.

My Questing is that, when I am going to enter any number into any editText then on heading textView it should display the multiplication of editText Value * textView Value of row of ListView.

And after that if i enter any other number inside any other editText then the calculation will be same like previous one, say multiplication of editText Value * textView Value of row of ListView + multiplication of editText Value * textView Value of row of ListView and display this new value on the heading textView. And if change the value any editText then the previous value of old position should be updated on new value of corrosponding position.
I know all this work is going to be happened in the textwatcher but don’t know how??
Can you help me???

Answer 1

I think this piece of code will help you…..

EditText etSearchBar = (EditText)findViewById(Your_id);

    etSearchBar.addTextChangedListener(textwatcher);

    private TextWatcher textwatcher = new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {

            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {


            }

            @Override
            public void afterTextChanged(Editable s) {

                //Do what ever you want here after you enter each text
            }
        };