如何更新我的ListView行

Question

我已经通过文本框将数据添加到列表视图中。

我想通过点击ListView更新listview的行。 所有行数据都来自sqlite数据库，然后再次在我的文本框中排列数据。

listview活动和Addactivity是分开的... 在此处输入图像描述

我需要你的帮助

SQLiteListAdapter.java：

package com.androidstudio.myinventory;

import android.app.ProgressDialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by HP on 9/15/2017.
 */

public class SQLiteListAdapter extends BaseAdapter {

    Context context;
    ArrayList<String> Item_ID;
    ArrayList<String> ItemName;
    ArrayList<String> Quantity;


    ArrayList<String> Price;
    ArrayList<String> Value;
    //  ArrayList<String> Detail ;


    public SQLiteListAdapter(Context context, ArrayList<String> item_ID, ArrayList<String> itemName,
                             ArrayList<String> quantity, ArrayList<String> price, ArrayList<String> value) {
        this.context = context;
        this.Item_ID = item_ID;
        this.ItemName = itemName;
        this.Quantity = quantity;
        this.Price = price;
        this.Value = value;
        //this.Detail = detail;

    }


    @Override
    public int getCount() {
        return Item_ID.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View child, ViewGroup parent) {


        Holder holder;

        LayoutInflater layoutInflater;

        //Check if this is the first time creating this row for the listview
        if (child == null) {

            //get the Android's layout inflater service which will read row_details.xml
            layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            //Fill the row view with the xml layout file
            child = layoutInflater.inflate(R.layout.edit_stock_row, null);

            //Row was null, need to get components from the row_details.xml
            holder = new Holder();
            //Fill the holder with the text view components
            holder.textviewid = (TextView) child.findViewById(R.id.tvsr);
            holder.textviewname = (TextView) child.findViewById(R.id.tvname);
            holder.textviewquantity = (TextView) child.findViewById(R.id.tvquantity);
            holder.textviewprice = (TextView) child.findViewById(R.id.tvprice);
            holder.textviewvalue = (TextView) child.findViewById(R.id.tvvalue);
            //holder.textviewdetail = (TextView) child.findViewById(R.id.tvdetail);


            //attach the holder to the row
            child.setTag(holder);

        } else {
            //row was created before! thus get the holder object from the row tag
            holder = (Holder) child.getTag();
        }

        //At this point we have our row, either created from new or got it from the row tag object
        //we can now fill the data

        //get our object from the list which is in the position of the listview
        //position is passed to the getView method by the listview


        holder.textviewid.setText(Item_ID.get(position));
        holder.textviewname.setText(ItemName.get(position));
        holder.textviewquantity.setText(Quantity.get(position));
        holder.textviewprice.setText(Price.get(position));
        holder.textviewvalue.setText(Value.get(position));
        // holder.textviewdetail.setText(Detail.get(position));


        //return to listview to show
        return child;
    }

    //A holder will be responsible to hold the components to improve listview performance
//We replicate the components in the row_details.xml
    public class Holder {
        TextView textviewid;
        TextView textviewname;
        TextView textviewquantity;
        TextView textviewprice;
        TextView textviewvalue;
        // TextView textviewdetail;

    }

}

Edit_Stock.java：

package com.androidstudio.myinventory;

import android.content.ContentResolver;
import android.content.Intent;
import android.database.CharArrayBuffer;
import android.database.ContentObserver;
import android.database.Cursor;
import android.database.DataSetObserver;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class Edit_Stock extends AppCompatActivity {

    public static final String KEY1 = "key1";
    StockDBHelper stockDBHelper;
    SQLiteListAdapter ListAdapter;
    ListView listView;
    TextView textView;
    String search;
    SQLiteDatabase sqLiteDatabase;
    Cursor cursor;


    ArrayList<String> ID_ArrayList = new ArrayList<String>();
    ArrayList<String> NAME_ArrayList = new ArrayList<String>();
    ArrayList<String> QUANTITY_ArrayList = new ArrayList<String>();
    ArrayList<String> PRICE_ArrayList = new ArrayList<String>();
    ArrayList<String> VALUE_ArrayList = new ArrayList<>();
    // ArrayList<String> DETAIL_ArrayList = new ArrayList<String>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit__stock);
        textView = (TextView) findViewById(R.id.tvdetail);

        stockDBHelper = new StockDBHelper(this);
        listView = (ListView) findViewById(R.id.listviewedit);


    }

    @Override
    protected void onResume() {

        ShowSQLiteDBdata();

        super.onResume();
    }

    private void ShowSQLiteDBdata() {

        sqLiteDatabase = stockDBHelper.getWritableDatabase();

        cursor = sqLiteDatabase.rawQuery("SELECT * FROM tbl_stock1", null);

        ID_ArrayList.clear();
        NAME_ArrayList.clear();
        QUANTITY_ArrayList.clear();
        PRICE_ArrayList.clear();
        VALUE_ArrayList.clear();
        //DETAIL_ArrayList.clear();

        if (cursor.moveToFirst()) {
            do {
                ID_ArrayList.add(cursor.getString(cursor.getColumnIndex(stockDBHelper.COL_1)));

                NAME_ArrayList.add(cursor.getString(cursor.getColumnIndex(stockDBHelper.COL_2)));

                QUANTITY_ArrayList.add(cursor.getString(cursor.getColumnIndex(stockDBHelper.COL_10)));

                PRICE_ArrayList.add(cursor.getString(cursor.getColumnIndex(stockDBHelper.COL_9)));
                VALUE_ArrayList.add(cursor.getString(cursor.getColumnIndex(stockDBHelper.COL_5)));

                // DETAIL_ArrayList.add(cursor.getString(cursor.getColumnIndex(stockDBHelper.COL_7)));
               /* DETAIL_ArrayList.add(cursor.getColumnName(cursor.getColumnIndex(stockDBHelper.COL_7)));
                 DETAIL_ArrayList.iterator();
                 tvdetail.setText("Edit");*/
            } while (cursor.moveToNext());
        }

        ListAdapter = new SQLiteListAdapter(Edit_Stock.this, ID_ArrayList,
                NAME_ArrayList,
                QUANTITY_ArrayList,
                PRICE_ArrayList,
                VALUE_ArrayList
                // DETAIL_ArrayList

        );

        listView.setAdapter(ListAdapter);

        cursor.close();
    }


    public void tveditClick(View view) {

        String name = "";
        Intent intent = new Intent(Edit_Stock.this, AddStock.class);


        startActivity(intent);


        Toast.makeText(this, "cliced", Toast.LENGTH_SHORT).show();
    }

    //Edit works....................
    private void EditSQLiteDBdata() {
        // search=textView.toString();

    }
}

AddStock.java：

package com.androidstudio.myinventory;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.FragmentManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.GregorianCalendar;

public class AddStock extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
    EditText etproductname, etitemname, etbrand, etdate, etcompany, etprice, etquantity, etnotilimit, etlocation, etphoto;
    EditText etdetail;
    Spinner spinner_category;
    Button btnsave;
    StockDBHelper stockDBHelper;
    Context context;

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


        stockDBHelper = new StockDBHelper(this);

        etproductname = (EditText) findViewById(R.id.etproduct_name);
        etitemname = (EditText) findViewById(R.id.etItem_name);
        etbrand = (EditText) findViewById(R.id.etbrand);
        etdate = (EditText) findViewById(R.id.etDate);
        spinner_category = (Spinner) findViewById(R.id.Spinner_category);
        etdetail = (EditText) findViewById(R.id.etdetail);
        etcompany = (EditText) findViewById(R.id.etcompany);
        etprice = (EditText) findViewById(R.id.etprice);
        etquantity = (EditText) findViewById(R.id.etquantity);
        etnotilimit = (EditText) findViewById(R.id.etnoti_limit);
        etlocation = (EditText) findViewById(R.id.etlocation);
        etphoto = (EditText) findViewById(R.id.etupdate_photo);

        btnsave = (Button) findViewById(R.id.btnsave);

        pupulateSpinner();
        image = (ImageView) findViewById(R.id.imageView);

    }


    DatePickerDialog.OnDateSetListener mpickerDialog;

    //  etDate onClick event method
    public void datePick(View view) {
        etdate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Calendar cal = Calendar.getInstance();
                int year = cal.get(Calendar.YEAR);
                int month = cal.get(Calendar.MONTH);
                int day = cal.get(Calendar.DAY_OF_MONTH);

                DatePickerDialog dialog = new DatePickerDialog(AddStock.this, android.R.style.Theme_Holo_Light_Dialog_MinWidth
                        , mpickerDialog, year, month, day);

                dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
                dialog.show();
            }
        });
        mpickerDialog = new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker datePicker, int year, int month, int day) {
                month = month + 1;
                Log.d("TAG", "onDateSet :" + month + "/" + day + "/" + year);
                String date = month + "/" + day + "/" + year;
                etdate.setText(date);

            }
        };
    }


    // spinner populating method called in oncreate()
    public void pupulateSpinner() {
        spinner_category.setOnItemSelectedListener(this);
        // String[] list = getResources().getStringArray(R.array.Categories);

      /*  ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,R.layout.activity_add_stock,list);
        spinner_category.setAdapter(arrayAdapter);
*/

        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
                R.array.Categories, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
        spinner_category.setAdapter(adapter);
    }


    @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {

    }

    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {

    }

    ImageView image;
    Integer REQUEST_CAMERA = 1, SELECT_FILE = 0;

    public void photoClick(View view) {


        final CharSequence[] items = {"Take Photo", "Choose from Gallery",
                "Cancel"};

        AlertDialog.Builder builder = new AlertDialog.Builder(AddStock.this);
        builder.setTitle("Add Photo!");
        builder.setItems(items, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int item) {
                if (items[item].equals("Take Photo")) {

                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    startActivityForResult(intent, REQUEST_CAMERA);

                } else if (items[item].equals("Choose from Gallery")) {

                    Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    intent.setType("image/*");

                    startActivityForResult(Intent.createChooser(intent, "Select File"), SELECT_FILE);
                } else if (items[item].equals("Cancel")) {

                    dialog.dismiss();
                }
            }


        });
        builder.show();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == Activity.RESULT_OK) {


            if (requestCode == REQUEST_CAMERA) {
                // onCaptureImageResult(data);
                Bundle bundle = data.getExtras();
                final Bitmap bmp = (Bitmap) bundle.get("data");
                image.setImageBitmap(bmp);
            } else if (requestCode == SELECT_FILE) {
                Uri selectphotoUri = data.getData();
                image.setImageURI(selectphotoUri);
            }


        }
    }


    // save button onClick event
    public void saveStock(View view) {
        // Button button=new Button(context);
        //button.setText("View");
        //etdetail.setText(text);*/

        etdetail.setText("View");
        btnsave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                boolean isInserted = stockDBHelper.insertData(etitemname.getText().toString(), etproductname.getText().toString(),
                        etbrand.getText().toString(), etdate.getText().toString(), spinner_category.getSelectedItem().toString(),
                        etcompany.getText().toString(), etprice.getText().toString(), etquantity.getText().toString(),
                        etnotilimit.getText().toString(), etlocation.getText().toString(), etphoto.getText().toString());

                if (isInserted == true) {
                    Toast.makeText(AddStock.this, "Data inserted successfully", Toast.LENGTH_SHORT).show();
                } else
                    Toast.makeText(AddStock.this, "Data was not inserted", Toast.LENGTH_SHORT).show();
            }
        });


    }

}

StockDBHelper.java

package com.androidstudio.myinventory;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by HP on 9/10/2017.
 */

public class StockDBHelper extends SQLiteOpenHelper {
         public static final String DB_NAME = "stock1.db";
         public static final String TABLE_NAME = "tbl_stock1";
    public static final String COL_1 = "SERIAL";
    public static final String COL_2 = "ITEM_NAME";
    public static final String COL_3 = "PRODUCT_NAME";
    public static final String COL_4 = "BRAND";
    public static final String COL_5 = "DATE";
    public static final String COL_6 = "CATEGORY";
   // public static final String COL_7 = "DETAIL";
    public static final String COL_8 = "COMPANY";
    public static final String COL_9 = "PRICE";
    public static final String COL_10 = "QUANTITY";
    public static final String COL_11 = "NOTIFICATION_LIMIT";
    public static final String COL_12 = "LOCATION";
    public static final String COL_13 = "PHOTO";



    public StockDBHelper(Context context) {
        super(context,DB_NAME, null, 3);


    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL("CREATE TABLE " + TABLE_NAME + "(SERIAL INTEGER PRIMARY KEY AUTOINCREMENT, " +
                "ITEM_NAME TEXT,PRODUCT_NAME TEXT,BRAND TEXT, DATE INTEGER ,CATEGORY TEXT,COMPANY TEXT,PRICE INTEGER," +
                "QUANTITY INTEGER,NOTIFICATION_LIMIT INTEGER,LOCATION TEXT,PHOTO TEXT)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
       sqLiteDatabase.execSQL(" DROP TABLE IF EXISTS " +   TABLE_NAME);
       onCreate(sqLiteDatabase);
    }

    public boolean insertData(String item_name,String product_name , String brand , String date , String category, String company,
                                   String price,String quantity, String noti_limit , String location,String photo)
    {
        SQLiteDatabase sqLiteDatabase = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_2,item_name);
        contentValues.put(COL_3,product_name);
        contentValues.put(COL_4,brand);
        contentValues.put(COL_5,date);
        contentValues.put(COL_6,category);
        //contentValues.put(COL_7,detail);
        contentValues.put(COL_8,company);
        contentValues.put(COL_9,price);
        contentValues.put(COL_10,quantity);
        contentValues.put(COL_11,noti_limit);
        contentValues.put(COL_12 ,location);
        contentValues.put(COL_13,photo);


        long result = sqLiteDatabase.insert(TABLE_NAME,null,contentValues);

        if (result == -1)
        return  false;
        else
        return true;
    }
    public Cursor editdata(String id,SQLiteDatabase sqLiteDatabase){
        Cursor cursor;
        String \[\] projection = {COL_1,COL_2,COL_3,COL_4,COL_5,COL_6,COL_8,COL_9,COL_10,COL_11,COL_12,COL_13};
        String selection= COL_1+ " LIKE ?";
        String\[\] selection_arg={id};

        cursor=sqLiteDatabase.query(TABLE_NAME,projection,selection,selection_arg,null,null,null);
        return cursor;
    }

    // Show data in listview editing
    /*public void ShowListData(String Id, String item_name , String quantity , String price , String value, String detail)
    {
        SQLiteDatabase sqLiteDatabase = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_1,Id);
        contentValues.put(COL_2,item_name);
        contentValues.put(COL_10,quantity);
        contentValues.put(COL_9,price);
        // Value is to be brought by java coding
        contentValues.put(COL_7,detail);
    }*/
/*

    public Cursor insertDataIntoList(){
        SQLiteDatabase sqLiteDatabase = this.getReadableDatabase();
        Cursor res=sqLiteDatabase.rawQuery(" SELECT * FROM " + TABLE_NAME,null);
        return res;
    }
*/

}][2]

Answer 1

只需在适配器中获取行的父级单击，然后从该单击中捕获ID列即可。

Item_ID.get(position);

然后通过意图将其传递到要显示所有数据的活动。 然后获取该ID并查询数据库以获取所有数据。

@Override
public Object getItem(int position) {
    return position;
}

@Override
public long getItemId(int position) {
    return position;
}

Answer 2

您可以使用adapter.notifyDataSetChanged(); 刷新列表视图。