Bluetooth module | #8

DeviceListFragment.kt

import android.app.Activity
import android.bluetooth.BluetoothAdapter
import android.bluetooth.BluetoothDevice
import android.bluetooth.BluetoothManager
import android.content.Context
import android.content.Intent
import android.graphics.Color
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.activity.result.ActivityResultLauncher
import androidx.activity.result.contract.ActivityResultContracts
import androidx.recyclerview.widget.LinearLayoutManager
import com.google.android.material.snackbar.Snackbar
import com.neco_dev.bt_def.databinding.FragmentListBinding

class DeviceListFragment : Fragment(), ItemAdapter.Listener {
    private lateinit var itemAdapter: ItemAdapter
    private var bAdapter: BluetoothAdapter? = null
    private lateinit var binding: FragmentListBinding
    private lateinit var btLauncher: ActivityResultLauncher<Intent>

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        binding = FragmentListBinding.inflate(inflater, container, false)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        binding.imBluetoothOn.setOnClickListener {
           btLauncher.launch(Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE))
        }
        initRcViews()
        registerBtLauncher()
        initBtAdapter()
        bluetoothState()
    }

    private fun initRcViews() = with(binding){
        rcViewPaired.layoutManager = LinearLayoutManager(requireContext())
        itemAdapter = ItemAdapter(this@DeviceListFragment)
        rcViewPaired.adapter = itemAdapter
    }

    private fun getPairedDevices(){
        try {
            val list = ArrayList<ListItem>()
            val deviceList = bAdapter?.bondedDevices as Set<BluetoothDevice>
            deviceList.forEach{
               list.add(
                   ListItem(
                       it.name,
                       it.address,
                       false
                   )
               )
            }
            binding.tvEmptyPaired.visibility = if(list.isEmpty()) View.VISIBLE else View.GONE
            itemAdapter.submitList(list)
        } catch (e: SecurityException){

        }

    }

    private fun initBtAdapter(){
      val bManager = activity?.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
      bAdapter = bManager.adapter
    }

    private fun bluetoothState(){
        if (bAdapter?.isEnabled == true){
        changeButtonColor(binding.imBluetoothOn, Color.GREEN)
            getPairedDevices()
        }
    }

    private fun registerBtLauncher(){
        btLauncher = registerForActivityResult(
            ActivityResultContracts.StartActivityForResult()
        ){
            if (it.resultCode == Activity.RESULT_OK){
                changeButtonColor(binding.imBluetoothOn, Color.GREEN)
                getPairedDevices()
                Snackbar.make(binding.root, "Блютуз включен!", Snackbar.LENGTH_LONG).show()
            } else {
                Snackbar.make(binding.root, "Блютуз выключен!", Snackbar.LENGTH_LONG).show()
            }
        }
    }

    override fun onClick(device: ListItem) {

    }

}

ItemAdapter.kt

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.CheckBox
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import com.neco_dev.bt_def.databinding.ListItemBinding

class ItemAdapter(private val listener: Listener) :
    ListAdapter<ListItem, ItemAdapter.MyHolder>(Comparator()) {
    private var oldCheckBox: CheckBox? = null

    class MyHolder(
        view: View, private val adapter: ItemAdapter,
        private val listener: Listener
    ) : RecyclerView.ViewHolder(view) {
        private val b = ListItemBinding.bind(view)
        private var device: ListItem? = null

        init {
            b.checkBox.setOnClickListener {
                device?.let { it1 -> listener.onClick(it1) }
                adapter.selectCheckBox(it as CheckBox)
            }
            itemView.setOnClickListener {
                device?.let { it1 -> listener.onClick(it1) }
                adapter.selectCheckBox(b.checkBox)
            }
        }

        fun bind(item: ListItem) = with(b) {
            device = item
            name.text = item.name
            mac.text = item.mac
        }
    }

    class Comparator : DiffUtil.ItemCallback<ListItem>() {
        override fun areItemsTheSame(oldItem: ListItem, newItem: ListItem): Boolean {
            return oldItem == newItem
        }

        override fun areContentsTheSame(oldItem: ListItem, newItem: ListItem): Boolean {
            return oldItem == newItem
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyHolder {
        val view = LayoutInflater.from(parent.context)
            .inflate(R.layout.list_item, parent, false)
        return MyHolder(view, this, listener)
    }

    override fun onBindViewHolder(holder: MyHolder, position: Int) {
        holder.bind(getItem(position))
    }

    fun selectCheckBox(checkBox: CheckBox) {
        oldCheckBox?.isChecked = false
        oldCheckBox = checkBox
        oldCheckBox?.isChecked = true
    }

    interface Listener {
        fun onClick(device: ListItem)
    }
}

ListItem.kt

data class ListItem(
    val name: String,
    val mac: String,
    val isChecked: Boolean
)

BaseActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView

class BaseActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_base)
       // initRcView()
       supportFragmentManager.beginTransaction()
           .replace(R.id.placeHolder, DeviceListFragment()).commit()
    }
}

Добавить комментарий

Ваш адрес email не будет опубликован.