从适配器到主要活动获取价值

如何解决从适配器到主要活动获取价值

我试图获取使用回收者视图在编辑文本中输入的值。单击提交后，我想将editetxt中给出的文本保存到表中。

1. 使用Json将数据存储到表中-成功

2. 上一个阵列适配器我得到了数据

3. 现在如何在单个提交按钮上将数据从适配器移动到主要活动，以将数据保存到表中。 [在此处输入图片描述] [1]

   活动

    public class fertlizerRequest extends AppCompatActivity  {
   
    Button submit_btn,view_btn;
    RecyclerView material_lv;
    ArrayList<ProductData> arrayList;
    ProductsAdapter myAdapterP;
    private RecyclerView.LayoutManager mLayoutManager;
    DBHelperClass dbHelperClass = new DBHelperClass(this);
    Integer[] enterednumber = new Integer[1000];
   
   
   
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fertlizer_request);
   
        datacasting();
   
        view_btn.setonClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                PlantLocationAssy plantLocationAssy = new PlantLocationAssy();
                plantLocationAssy.execute();
   
            }
        });
   
        submit_btn.setonClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
   
                Toast.makeText(fertlizerRequest.this,"Edited Item are ",Toast.LENGTH_SHORT).show();
            }
        });
   
    }
   
   
    void datacasting(){
   
        material_lv = (RecyclerView) findViewById(R.id.materialreq_lv);
        submit_btn = (Button) findViewById(R.id.sbt_btn);
        view_btn = (Button) findViewById(R.id.vie_btn);
        mLayoutManager = new linearlayoutmanager(this);
        material_lv.setLayoutManager(mLayoutManager);
    }
   
    void fetchProductData(){
   
        arrayList = dbHelperClass.getProductsDataFromDB();
        myAdapterP = new ProductsAdapter(fertlizerRequest.this,arrayList,new ProductsAdapter.onEditTextChanged() {
   
            @Override
            public void onTextChanged(int position,String charSeq) {
                enterednumber[position] = Integer.valueOf(charSeq);
                System.out.println("==================================== " + position);
                Toast.makeText(fertlizerRequest.this,"Entered value is " + myAdapterP.getItemId(position),Toast.LENGTH_SHORT).show();
            }
        });
        material_lv.setAdapter(myAdapterP);
        myAdapterP.notifyDataSetChanged();
        System.out.println("==================================== " + myAdapterP.getItemCount() );
    }
   
   
   
    private class PlantLocationAssy extends AsyncTask<Void,Void,Void> {
   
        @Override
        protected Void doInBackground(Void... voids) {
            return null;
        }
   
        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);
            fetchProductData();
   
        }
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }
    }
   

   }

适配器

    package com.example.fertlizertrackerapp.Adapter;


import android.content.Context;
import android.content.Intent;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

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

import com.example.fertlizertrackerapp.Model.ProductData;
import com.example.fertlizertrackerapp.R;

import java.io.Serializable;
import java.util.ArrayList;

public class ProductsAdapter extends RecyclerView.Adapter<ProductsAdapter.Holder> {

    private Context context;
    private ArrayList<ProductData> arrayList;
    private onEditTextChanged onEditTextChanged;


    public ProductsAdapter(Context context,ArrayList<ProductData> arrayList,onEditTextChanged onEditTextChanged) {
        this.context = context;
        this.arrayList = arrayList;
        this.onEditTextChanged = onEditTextChanged;
    }




    @NonNull
    @Override
    public Holder onCreateViewHolder(@NonNull ViewGroup parent,int viewType) {

        View view = LayoutInflater.from(context).inflate(R.layout.cust_lv_fertilizer_request,parent,false);
        return new Holder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull final Holder holder,final int position) {


        final ProductData productData = arrayList.get(position);

        // get for view
        String productId = productData.getProductId();
        final String material = productData.getMaterial();
        String materialCode = productData.getMaterialCode();

        //set view
        holder.productId.setText(productId);
        holder.material.setText(material);
        holder.materialCode.setText(materialCode);

        holder.quantity.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s,int start,int count,int after) {

            }

            @Override
            public void onTextChanged(CharSequence s,int before,int count) {
                onEditTextChanged.onTextChanged(position,s.toString());

                String qty = holder.quantity.getText().toString();

                Toast.makeText(context,"Value Changed is " + material + " : " + qty,Toast.LENGTH_SHORT).show();

            }

            @Override
            public void afterTextChanged(Editable s) {


            }
        });

    }

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

    class Holder extends RecyclerView.ViewHolder{

        TextView productId,material,materialCode;
        EditText quantity;

        public Holder(@NonNull View itemView) {
            super(itemView);

            productId = itemView.findViewById(R.id.productId_tv);
            material = itemView.findViewById(R.id.materialName_tv);
            materialCode = itemView.findViewById(R.id.materialCode_tv);
            quantity = (itemView).findViewById(R.id.materialQuantity_edt);
        }


    }


    @Override
    public int getItemViewType(int position) {
        return super.getItemViewType(position);
    }

    public interface onEditTextChanged{
        void onTextChanged(int position,String charSeq);

    }



}


Model

package com.example.fertlizertrackerapp.Model;

public class ProductData {

    String ProductId,Material,MaterialCode;
    int quantity = 0;

    public ProductData(String productId,String material,String materialCode) {
        this.ProductId = productId;
        this.Material = material;
        this.MaterialCode = materialCode;
    }

    public String getProductId() {
        return ProductId;
    }

    public void setProductId(String productId) {
        ProductId = productId;
    }

    public String getMaterial() {
        return Material;
    }

    public void setMaterial(String material) {
        Material = material;
    }

    public String getMaterialCode() {
        return MaterialCode;
    }

    public void setMaterialCode(String materialCode) {
        MaterialCode = materialCode;
    }

    public int getQuantity() {
        return quantity;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }
}


DBHelperClass

    package com.example.fertlizertrackerapp;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.sqliteDatabase;
import android.database.sqlite.sqliteOpenHelper;

import com.example.fertlizertrackerapp.Model.PlantData;
import com.example.fertlizertrackerapp.Model.ProductData;
import com.example.fertlizertrackerapp.Model.ProductRateData;

import java.util.ArrayList;

public class DBHelperClass extends sqliteOpenHelper {

    public static final int DBVersion = 1;
    public static final String DB_Godown = "FertlizerApp.db";



    public static final String DB_ProductListTABLE = "ProductDetails";
    public static final String DB_ProductId = "ProductId";
    public static final String DB_productStatus = "productStatus";
    public static final String DB_Material = "Material";
    public static final String DB_MaterialCode = "MaterialCode";
    public static final String DB_MaterialStatus = "Status";
    public static final String DB_MaterialCreatedBy = "CreatedBy";
    public static final String DB_MaterialCreatedOn = "CreatedOn";
    public static final String DB_MaterialUpdatedBy = "UpdatedBy";
    public static final String DB_MaterialUpdatedOn = "UpdatedOn";




    @Override
    public void onCreate(sqliteDatabase db) {

        db.execsql(" CREATE TABLE " + DB_ProductListTABLE + "(" + DB_ProductId + " TEXT,"
            + DB_productStatus + " TEXT,"
            + DB_Material + " TEXT,"
            + DB_MaterialCode + " TEXT NOT NULL PRIMARY KEY,"
            + DB_MaterialStatus + " TEXT,"
            + DB_MaterialCreatedBy + " TEXT,"
            + DB_MaterialCreatedOn + " TEXT,"
            + DB_MaterialUpdatedBy + " TEXT,"
            + DB_MaterialUpdatedOn + " TEXT)");

        }
    @Override
    public void onUpgrade(sqliteDatabase db,int oldVersion,int newVersion) {

       
        db.execsql("DROP TABLE IF EXISTS " + DB_ProductListTABLE);
        

    }


    public Boolean insertProductDetails(String v_ProductId,String v_productStatus,String v_Material,String v_MaterialCode,String v_MaterialStatus,String v_MaterialCreatedBy,String v_MaterialCreatedOn,String v_MaterialUpdatedBy,String v_MaterialUpdatedOn) {

        sqliteDatabase db = this.getWritableDatabase();
        ContentValues contentValue = new ContentValues();
        contentValue.put("ProductId",v_ProductId);
        contentValue.put("productStatus",v_productStatus);
        contentValue.put("Material",v_Material);
        contentValue.put("MaterialCode",v_MaterialCode);
        contentValue.put("Status",v_MaterialStatus);
        contentValue.put("CreatedBy",v_MaterialCreatedBy);
        contentValue.put("CreatedOn",v_MaterialCreatedOn);
        contentValue.put("UpdatedBy",v_MaterialUpdatedBy);
        contentValue.put("UpdatedOn",v_MaterialUpdatedOn);

        long result = db.insert(DB_ProductListTABLE,null,contentValue);

        if (result == -1)
            return false;
        else
            return true;
    }


    public DBHelperClass(Context context) {
        super(context,DB_Godown,DBVersion);

    }


   public ArrayList<ProductData> getProductsDataFromDB(){


        ArrayList<ProductData> arrayList = new ArrayList<>();
        sqliteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery("select * from " + DB_ProductListTABLE,null);

        while (cursor.movetoNext()) {

            String productId = cursor.getString(0);
            String material = cursor.getString(2);
            String materialCode = cursor.getString(3);

            ProductData productData = new ProductData(productId,materialCode);

            arrayList.add(productData);

            System.out.println("00000000000000000000 Product 00000000000000000000000000000  " + material);

        }
        return arrayList;

    }


}


  [1]: https://i.stack.imgur.com/ikNRR.jpg