RecyclerView of Button array - How to update the data?

Question

This is my first Q on the site, I'll try to form it well. I have a recyclerView, and the Item is an array of buttons. Button click shows a popup menu that allows the user to change the color of the button. I've managed to set that the onClick method will change the color, but I'm clueless about how to save the chosen color in the ButtonArrayList, that Holds the colors.

The problem is that when the button is pressed, I don't know how to understand programatically on which button, in which button array it was pressed.

Thanks!

Just to demonstrate the problem. when button is clicked, How to identify which button of which item was clicked? 1

The code of the fragment:

package com.examples.recyclerViewWithButtonArray;

import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.material.floatingactionbutton.FloatingActionButton;

import java.util.LinkedList;


/**
 * A simple {@link Fragment} subclass.
 * Use the {@link Game#newInstance} factory method to
 * create an instance of this fragment.
 */
public class Game extends Fragment {
    // TODO: Rename parameter arguments, choose names that match
    protected static int[] mButtonsColors;

    private final LinkedList mButtonArrayList = new LinkedList<>();
    RecyclerView mGuessLinesRecyclerView;
    ButtonArrayListAdapter mButtonArrayListAdapter;
    FloatingActionButton mFab;

    // TODO: Rename and change types of parameters

    public Game() {
        // Required empty public constructor
    }

    public static Game newInstance(String param1, String param2) {
        Game fragment = new Game();
        return fragment;
    }

    private void initGameColors(){
        mButtonsColors = new int[4];
        int[] c = getContext().getResources().getIntArray(R.array.buttonColors);
        //asign colors
        for (int i = 0; i < 4; i++) {
            this.mButtonsColors[i] = c[i];
            }
    }


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initGameColors();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View vw = inflater.inflate(R.layout.fragment_game, container, false);
        return vw;
    }

    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mGuessLinesRecyclerView = view.findViewById(R.id.recycler_view);
        mFab = view.findViewById(R.id.fab);
        //initialize recyclerView
        // Create an adapter and supply the data to be displayed.
        mButtonArrayListAdapter = new ButtonArrayListAdapter(getContext(), mButtonArrayList, this);
        // Connect the adapter with the RecyclerView.
        mGuessLinesRecyclerView.setAdapter(mButtonArrayListAdapter);
        // Give the RecyclerView a default layout manager.
        mGuessLinesRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));

        //initializeFAB
        mFab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mButtonArrayList.add(new ButtonArray(getContext(),mButtonsColors));
                mGuessLinesRecyclerView.setAdapter(mButtonArrayListAdapter);
            }
        });


        //add first array to the recycler view.
        // Next guess lines will be added when clicking on movableFab
        mButtonArrayList.add(new ButtonArray(getContext(), this.mButtonsColors));
    }
}

The code of ButtonArrayListAdapter:

package com.examples.recyclerViewWithButtonArray;

import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.PopupWindow;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;

public class ButtonArrayListAdapter extends RecyclerView.Adapter {
    private final Context mContext;
    private final List mData;
    class ButtonArrayViewHolder extends RecyclerView.ViewHolder {
        public ArrayList

user_5816306 · Answer

After reading your question what I get is you want to save the color against every button so next time when that button click the same color should load if yes then you can consider these tw0 suggestions

1- if the number of buttons is static and you are not adding them dynamically then you can hardcode the color against each button by adding them in the list and assign them manually against each button.

2- you can use key-value pair(hash map), these are the best solution for any case either you're are manually adding the button or dynamically, just store the color against each key. In this case, buttons should be your keys and colors will be value.

Thanku

RecyclerView of Button array - How to update the data?

1 Answers