How to send text of RecyclerView's EditText to an Activity

Question

I want to send text value of EditText from RecyclerView Adapter to an Activity. In my scenario, I need to send EditText text from Adapter to an Activity when a button pressed (The button is in Activity class not in Adapter). In this code of Adapter class,

viewHolder.value.setText(memberUpdate.getAmount());

I've set value of EditText. Now i want to get this value from this adapter to Activity class whenever Button clicked. The Button which going to be clicked is updateBtn = findViewById(R.id.update_expense_btn); in Activity class. kindly tell me how i get values of EditText which is of Adapter class to Activity class.

Adapter Class:

   class AdapterUpdateExpense extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private final int MEMBERUPDATE = 4;
    private List<Object> items;
    private Context context;
    private Activity activity;
    private boolean isEvenlyRadioChecked;
    private Double amount = 0.0;

    AdapterUpdateExpense(Activity activity, Context context, List<Object> items, boolean isEvenlyRadioChecked) {
        this.activity = activity;
        this.context = context;
        this.items = items;
        this.isEvenlyRadioChecked = isEvenlyRadioChecked;
    }

    @Override
    public int getItemViewType(int position) {
        if (items.get(position) instanceof MemberUpdate) {
            return MEMBERUPDATE;
        }
        return -1;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        RecyclerView.ViewHolder holder = null;
        LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());

        switch (viewType) {
            case MEMBERUPDATE:
                View v4 = inflater.inflate(R.layout.update_expense_layout, viewGroup, false);
                holder = new holderMemberUpdate(v4);
                break;
        }
        return holder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
        switch (viewHolder.getItemViewType()) {
            case MEMBERUPDATE:
                holderMemberUpdate view4 = (holderMemberUpdate) viewHolder;
                configureHolderMemberUpdate(view4, position);
                break;
        }
    }

    private void configureHolderMemberUpdate(final  holderMemberUpdate viewHolder, final int position) {
        final MemberUpdate memberUpdate = (MemberUpdate) items.get(position);

        if (memberUpdate != null) {
            viewHolder.name.setText(memberUpdate.getTitle());
            viewHolder.value.setText(memberUpdate.getAmount());
        }

        amount+= Double.valueOf(viewHolder.value.getText().toString());
        Log.d("sdfsdfah", getAmount().toString());
    }

    class holderMemberUpdate extends RecyclerView.ViewHolder{
        TextView name;
        EditText value;

        holderMemberUpdate(View view) {
            super(view);
            name = view.findViewById(R.id.member_name_txtview);
            value = view.findViewById(R.id.member_expense_edittxt);

            if(isEvenlyRadioChecked) {
                value.setEnabled(false);
            } else {
                value.setEnabled(true);
                value.setTextColor(context.getResources().getColor(R.color.colorAccent));
            }

        }
    }

Activity Class:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_update_expense);

        Intent intent = getIntent();
        if (intent.getExtras() != null) {
            receipt = intent.getStringExtra("receipt");
            Log.d("receiptIntent", receipt);
        }


        getReference();


    }

    void getReference() {
updateBtn = findViewById(R.id.update_expense_btn);
        updateBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                memberAmount = ((AdapterUpdateExpense)recyclerView.getAdapter()).getAmount();
                Log.d("memberAmount", memberAmount.toString());
            }
        });
    }

Answer 1

You better implement TextChangeListener, so whenever a user edits the value in edit text, you can store the newly edited value in a new variable in List items or a separate hashamp to store.

//Hashmap to store edited amount. Is static to access this in Activity class.
    public static HashMap<Integer,String> newAmountHashMap =  new HashMap<Integer, String>();


class holderMemberUpdate extends RecyclerView.ViewHolder{
        TextView name;
        EditText value;

        holderMemberUpdate(View view) {
            super(view);
            name = view.findViewById(R.id.member_name_txtview);
            value = view.findViewById(R.id.member_expense_edittxt);
value.addTextChangedListener(new MyCustomEditTextListener(this));
            if(isEvenlyRadioChecked) {
                value.setEnabled(false);
            } else {
                value.setEnabled(true);
                value.setTextColor(context.getResources().getColor(R.color.colorAccent));
            }

        }
    }

//Text change Listener

private class MyCustomEditTextListener implements TextWatcher {
        private int position;

        public void updatePosition(int position) {
            this.position = position;
        }

        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
            // no op
        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            newAmountHashMap.put(position, editable.toString());
        }
    }

And Finally, you should process the HashMap in button tap in Activity.

Answer 2

You need a TextWatcher on the value EditTexts that will set the value of the objects within List<Object> items, which should really not just be Object type, but at least some abstract Member type with a setAmount method.

private void configureHolderMemberUpdate(final  holderMemberUpdate viewHolder, final int position) {
    final MemberUpdate memberUpdate = (MemberUpdate) items.get(position);

    if (memberUpdate != null) {
        viewHolder.name.setText(memberUpdate.getTitle());
        viewHolder.value.setText(memberUpdate.getAmount());
    }

    // Add this
    viewHolder.value.addTextChangedListener(... 

Within the text watcher,

items.get(position).setAmount(Double.parseDouble(text));

How to use the TextWatcher class in Android?

Then, write a method to loop over items and sum those values, without any references to any views, or parsing anything.

That method can be written in the adapter, or the activity, where you passed in the list object to the activity