Notes

package com.example.AppPenjualan;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.SearchView;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.Toast;

import com.synnapps.carouselview.CarouselView;
import com.synnapps.carouselview.ImageListener;

import java.text.NumberFormat;
import java.util.ArrayList;

public class UserActivity extends AppCompatActivity {

private CardBarangAdapter cardBarangAdapter;

RecyclerView recyclerView;
ArrayList<Barang> list = new ArrayList<>();
CarouselView carouselView;

int[] sampleImages = {R.drawable.ayam1, R.drawable.ayam2, R.drawable.ayam3};

public static SQLiteHelper mSQLiteHelper;

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

carouselView = (CarouselView) findViewById(R.id.carouselView);
carouselView.setPageCount(sampleImages.length);

carouselView.setImageListener(imageListener);

mSQLiteHelper = new SQLiteHelper(this, "RECORDDB2.sqlite", null, 1);

recyclerView= findViewById(R.id.recycler);
recyclerView.setHasFixedSize(true);

Cursor cursor = UserActivity.mSQLiteHelper.getData("SELECT * FROM BARANG");
list.clear();

NumberFormat nf = NumberFormat.getNumberInstance();
nf.setMaximumFractionDigits(0);

while (cursor.moveToNext()){
String kode = cursor.getString(0);
String nama = cursor.getString(1);
String satuan = cursor.getString(2);
String jumlah = cursor.getString(3);
String harga = nf.format(cursor.getDouble(4));
byte[] image = cursor.getBlob(5);
String deskripsi = cursor.getString(4);
//add to list
list.add(new Barang(kode, nama, satuan, jumlah, harga, image,deskripsi));
}


if (list.size()==0){
//if there is no record in table of database which means listview is empty
Toast.makeText(this, "Record Tidak Ditemukan..", Toast.LENGTH_LONG).show();
}


showRecyclerList();
}

//menampilkan recyclerview
private void showRecyclerList(){
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(this, 2);
recyclerView.setLayoutManager(mLayoutManager);
cardBarangAdapter = new CardBarangAdapter(list);
recyclerView.setAdapter(cardBarangAdapter);

cardBarangAdapter.setOnItemClickCallback(new CardBarangAdapter.OnItemClickCallback() {
@Override
public void onItemClicked(Barang data) {
showSelectedBarang(data);
}
});
}

//ketika item recycler di klik
private void showSelectedBarang(Barang barang) {
Toast.makeText(this, barang.getItemId(), Toast.LENGTH_SHORT).show();
Intent intent = new Intent(UserActivity.this, UserPenjualanActivity.class);
intent.putExtra("kodeBarang",barang.getItemId());

startActivity(intent);
}

//tombol search di action bar
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.example_menu, menu);

MenuItem searchItem = menu.findItem(R.id.action_search);

androidx.appcompat.widget.SearchView searchView = (androidx.appcompat.widget.SearchView) searchItem.getActionView();
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}

@Override
public boolean onQueryTextChange(String newText) {
cardBarangAdapter.getFilter().filter(newText);
return false;
}
});

return true;
}
ImageListener imageListener = new ImageListener() {
@Override
public void setImageForPosition(int position, ImageView imageView) {
imageView.setImageResource(sampleImages[position]);
}
};

}