List Activity

package com.wildanfuady.sekolahku

import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.view.Menu
import android.view.MenuItem
import android.widget.AdapterView
import android.widget.AdapterView.OnItemClickListener
import android.widget.SearchView
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_list.*


class ListActivity : AppCompatActivity() {

    lateinit var adapter : SiswaItemAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_list)

        // buat variabel untuk memanggil class SiswaDataSource
        val siswaDataSource = SiswaDataSource(this)
        // membuat variabel untuk menampung data dari function getAll di SiswaDataSource
        val allSiswa = siswaDataSource.getAll()

//        var listNamaLengkap = ArrayList<String>()
//
//        for (i in allSiswa.indices){
//            listNamaLengkap.add(allSiswa.get(i).namad + " "+ allSiswa.get(i).namab)
//        }
//
//        var adapter = ArrayAdapter(this, android.R.layout.simple_list_item_1,
//            listNamaLengkap)
//
//        listView.adapter = adapter
//
//        toFormActivity.setOnClickListener {
//            var intent = Intent(this, FormActivity::class.java)
//            startActivity(intent)
//        }

    }

    override fun onResume() {
        super.onResume()

        val siswaDataSource = SiswaDataSource(this)
        val allSiswa = siswaDataSource.getAll()

        adapter = SiswaItemAdapter(this)
        adapter.addAll(allSiswa)
        adapter.notifyDataSetChanged()
        listView.adapter = adapter

        listView.setOnItemClickListener(AdapterView.OnItemClickListener {
                parent, view, position, id -> viewDetailSiswa(position)
        }
        )

    }

    private fun viewDetailSiswa(position: Int)
    {
//        Toast.makeText(this,"$position", Toast.LENGTH_SHORT).show()
        var intent = Intent(this, DetailActivity::class.java)
        var siswa = adapter.getItem(position)
        intent.putExtra("id", siswa?.id)
        startActivity(intent)
    }

    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.add, menu)
        return super.onCreateOptionsMenu(menu)
    }

    // biar icon save bisa diklik
    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        if(item.itemId == R.id.menu_add)
        {
            // action
            var intent = Intent(this, FormActivity::class.java)
            startActivity(intent)
        }
        return super.onOptionsItemSelected(item)
    }

}