activity

package com.example.iamusing5530.myapplication;

import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.media.Image;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;

import java.util.ArrayList;

public class BtnImageActivity extends AppCompatActivity {

    EditText etColor;
    Button btnAdd;
    Button btnChoose;
    ImageView imgPreview;

    RecyclerView recyclerView;
    ImgButtonAdapter imgButtonAdapter;

    String uriStr = null;

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

        etColor = findViewById(R.id.et_color);
        btnAdd = findViewById(R.id.btn_add);
        btnChoose = findViewById(R.id.btn_choose);
        imgPreview = findViewById(R.id.img_preview);

        recyclerView = findViewById(R.id.recycler);
        imgButtonAdapter = new ImgButtonAdapter(this);
        recyclerView.setAdapter(imgButtonAdapter);

        btnChoose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(intent, "Select Picture"), 0);
            }
        });

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MyImageButton myImageButton = new MyImageButton();
                myImageButton.color = Color.parseColor(etColor.getText().toString());
                if (uriStr == null)
                    return;
                myImageButton.uri = uriStr;
                imgButtonAdapter.add(myImageButton);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 0 && resultCode == RESULT_OK) {
            Uri uri = data.getData();
            imgPreview.setImageURI(uri);
            uriStr = uri.toString();
        }

        super.onActivityResult(requestCode, resultCode, data);
    }
}


class ImgButtonAdapter extends RecyclerView.Adapter<ImgButtonAdapter.ViewHolder> {
    Context context;
    SQLiteDatabase db;

    ArrayList<MyImageButton> list = new ArrayList<>();
    class ViewHolder extends RecyclerView.ViewHolder {
        ImageButton mImageButton;
        ViewHolder(ImageButton imageButton) {
            super(imageButton);
            mImageButton = imageButton;
            mImageButton.setScaleType(ImageView.ScaleType.FIT_CENTER);
            LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT,
                    100);
            mImageButton.setLayoutParams(layoutParams);
        }

        public void bind(MyImageButton myImageButton) {
            mImageButton.setBackground(DrawableFactory.getStateListDrawable(myImageButton.color));
            Log.d("AA", myImageButton.uri);
            mImageButton.setImageURI(Uri.parse(myImageButton.uri));
        }
    }

    ImgButtonAdapter(Context context) {
        this.context = context;
        db = context.openOrCreateDatabase("my.db", Context.MODE_PRIVATE, null);
        db.execSQL("CREATE TABLE IF NOT EXISTS \"t1\" (color INTEGER, uri TEXT)");
        Cursor cur = db.rawQuery("SELECT * FROM \"t1\"", null);
        if (cur.moveToFirst()) {
            do {
                MyImageButton myImageButton = new MyImageButton();
                myImageButton.color = cur.getInt(0);
                myImageButton.uri = cur.getString(1);
                list.add(myImageButton);
            } while (cur.moveToNext());
        }

        Log.d("AA", String.valueOf(list.size()));
        notifyDataSetChanged();
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        ImageButton imageButton = new ImageButton(context);
        return new ViewHolder(imageButton);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.bind(list.get(position));
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    public void add(MyImageButton myImageButton) {
        list.add(myImageButton);
        notifyItemInserted(list.size() - 1);
        ContentValues cv = new ContentValues();
        cv.put("color", myImageButton.color);
        cv.put("uri", myImageButton.uri);
        db.insert("\"t1\"",null, cv);
    }
}

class MyImageButton {
    Integer color = null;
    String uri = null;
}