Listing bluetooth devices

app/src/main/AndroidManifest.xml

@@ -2,7 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.example.rehabapp">
 
-
+    <uses-permission android:name="android.permission.BLUETOOTH"/>
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
 
     <application
             android:allowBackup="true"

app/src/main/java/com/example/rehabapp/ComFragment.kt

@@ -7,6 +7,9 @@ import android.view.ViewGroup
 import android.widget.Button
 import androidx.fragment.app.Fragment
 import android.app.Activity
+import android.bluetooth.BluetoothDevice
+import android.widget.ArrayAdapter
+import android.widget.Spinner
 
 class ComFragment : Fragment() {
 
@@ -17,9 +20,20 @@ class ComFragment : Fragment() {
     ): View {
         val view : View=inflater.inflate(R.layout.com_layout, container, false)
 
+
+        val selectDeviceSpinner: Spinner = view.findViewById(R.id.spinner)
         val startButton:Button=view.findViewById(R.id.startButton)
         val stopButton:Button=view.findViewById(R.id.stopButton)
 
+        val devicesList: ArrayList<BluetoothDevice> = (activity as MainActivity).pairedDeviceList()
+        val devicesNamesList: ArrayList<String> = ArrayList()
+        for(device:BluetoothDevice in devicesList){
+            devicesNamesList.add(device.name)
+        }
+        val adapter=ArrayAdapter((activity as MainActivity).applicationContext,android.R.layout.simple_spinner_item, devicesNamesList)
+        adapter.setNotifyOnChange(true)
+        selectDeviceSpinner.adapter=adapter
+
         startButton.setOnClickListener(View.OnClickListener {
             (activity as MainActivity).startChronometer()
         })

app/src/main/java/com/example/rehabapp/DatabaseHelper.kt

@@ -0,0 +1,55 @@
+package com.example.rehabapp
+
+import android.content.ContentValues
+import android.content.Context
+import android.database.Cursor
+import android.database.sqlite.SQLiteDatabase
+import android.database.sqlite.SQLiteOpenHelper
+import android.os.Build
+import android.widget.Toast
+import androidx.annotation.RequiresApi
+
+val EMG_DATABASE_NAME = "emgDatabase.db"
+val EMG_TABLE_NAME = "emg_data"
+val EMGCOL1 = "ID"
+val EMGCOL2 = "VALUE_RAW"
+val EMGCOL3 = "VALUE_FILTRED"
+
+
+@RequiresApi(Build.VERSION_CODES.P)
+class DatabaseHelper(private val context: Context) :
+    SQLiteOpenHelper(context, EMG_DATABASE_NAME, null, 1) {
+
+
+
+    override fun onCreate(p0: SQLiteDatabase?) {
+
+        val createTable="CREATE TABLE " + EMG_TABLE_NAME + " (" + EMGCOL1 + " INTEGER PRIMARY KEY AUTOINCREMENT," + EMGCOL2 + " INTEGER," + EMGCOL3 + " INTEGER)"
+        p0?.execSQL(createTable)
+    }
+
+
+    override fun onUpgrade(p0: SQLiteDatabase?, p1: Int, p2: Int) {
+
+    }
+
+    fun insertData(emgRaw: Int, emgFiltred: Int){
+        val db = this.writableDatabase
+        var cv = ContentValues()
+        cv.put(EMGCOL2, emgRaw)
+        cv.put(EMGCOL3, emgFiltred)
+        var result = db.insert(EMG_TABLE_NAME, null, cv)
+        if(result==-1.toLong()){
+            Toast.makeText(context, "Failed to insert", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    fun getRawEmgValues():Cursor{
+        val db = this.writableDatabase
+        val data: Cursor = db.rawQuery("SELECT * FROM " + EMG_TABLE_NAME, null)
+        return data
+    }
+
+
+
+}

app/src/main/java/com/example/rehabapp/EmgFragment.kt

@@ -1,11 +1,14 @@
 package com.example.rehabapp
 
+import android.database.Cursor
+import android.os.Build
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.annotation.RequiresApi
 import androidx.fragment.app.Fragment
-import com.example.rehabapp.ValuesToLoad.Companion.emgEntries
+import com.example.rehabapp.ValuesToLoad.Companion.rawEmgEntries
 import com.example.rehabapp.ValuesToLoad.Companion.fftEntries
 import com.github.mikephil.charting.charts.LineChart
 import com.github.mikephil.charting.data.Entry
@@ -18,6 +21,7 @@ class EmgFragment : Fragment() {
     lateinit var emgChart: LineChart
     lateinit var fftChart: LineChart
 
+    @RequiresApi(Build.VERSION_CODES.P)
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
@@ -26,8 +30,13 @@ class EmgFragment : Fragment() {
         val view: View = inflater.inflate(R.layout.emg_layout, container, false)
 
         emgChart=view.findViewById(R.id.emgChart)
-
-        val emgDataSet=LineDataSet(emgEntries, "Random")
+        val context = (activity as MainActivity).applicationContext
+        var db = DatabaseHelper(context)
+        val data: Cursor = db.getRawEmgValues()
+        while(data.moveToNext()){
+            rawEmgEntries.add(Entry(1.0F, data.getInt(1).toFloat()))
+        }
+        val emgDataSet=LineDataSet(rawEmgEntries, "Raw EMG")
 
         val emgLineData= LineData(emgDataSet)
         emgChart.data = emgLineData

app/src/main/java/com/example/rehabapp/MainActivity.kt

@@ -7,15 +7,21 @@ import androidx.viewpager.widget.ViewPager
 import com.google.android.material.appbar.AppBarLayout
 import com.google.android.material.tabs.TabLayout
 import android.R.attr.start
+import android.app.Activity
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.content.Intent
 import android.os.Build
 import android.os.SystemClock
+import android.util.Log
 import android.widget.Chronometer
 import android.widget.Toast
 import androidx.annotation.RequiresApi
 import com.example.rehabapp.ValuesToLoad.Companion.logText
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
 import java.util.*
+import kotlin.collections.ArrayList
 
 
 class MainActivity : AppCompatActivity() {
@@ -26,6 +32,14 @@ class MainActivity : AppCompatActivity() {
     var running = false
     lateinit var chronometer: Chronometer
 
+    private var bluetoothAdapter: BluetoothAdapter?=null
+    private lateinit var pairedDevices: Set<BluetoothDevice>
+    private val REQUEST_ENABLE_BLUETOOTH = 1
+
+    companion object{
+        val EXTRA_ADDRESS:String = "Device_address"
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
@@ -41,8 +55,24 @@ class MainActivity : AppCompatActivity() {
         chronometer=findViewById(R.id.chronometer)
         chronometer.format = "Time: %s"
         chronometer.base = SystemClock.elapsedRealtime()
+
+        bluetoothAdapter= BluetoothAdapter.getDefaultAdapter()
+        if(bluetoothAdapter==null){
+            Toast.makeText(this, "This device doesn't support bluetooth", Toast.LENGTH_LONG).show()
+        }
+        if(!bluetoothAdapter!!.isEnabled){
+            val enableBluetoothIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
+            startActivityForResult(enableBluetoothIntent, REQUEST_ENABLE_BLUETOOTH)
+        }
+
         }
 
+    @RequiresApi(Build.VERSION_CODES.P)
+    fun insertEmgData(emgRaw: Int, emgFiltred: Int){
+        val context = this
+        var db = DatabaseHelper(context)
+        db.insertData(emgRaw, emgFiltred)
+    }
 
     fun addLog(log: String) {
         val calendar = Calendar.getInstance()
@@ -78,4 +108,31 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if(requestCode==REQUEST_ENABLE_BLUETOOTH){
+            if(resultCode==Activity.RESULT_OK){
+                if(bluetoothAdapter!!.isEnabled){
+                    Toast.makeText(this, "Bluetooth enabled", Toast.LENGTH_LONG).show()
+                } else {
+                    Toast.makeText(this, "Bluetooth disabled", Toast.LENGTH_LONG).show()
+                }
+            } else if(resultCode==Activity.RESULT_CANCELED){
+                Toast.makeText(this, "Bluetooth enabling canceled", Toast.LENGTH_LONG).show()
+            }
+        }
+    }
+
+    fun pairedDeviceList():ArrayList<BluetoothDevice>{
+        pairedDevices=bluetoothAdapter!!.bondedDevices
+        val list: ArrayList<BluetoothDevice> = ArrayList()
+        if(pairedDevices.isNotEmpty()){
+            for(device:BluetoothDevice in pairedDevices){
+                list.add(device)
+                Log.i("device", ""+device)
+            }
+        }
+        return list
+    }
+
 }

app/src/main/java/com/example/rehabapp/ValuesToLoad.kt

@@ -6,7 +6,8 @@ class ValuesToLoad {
 
     companion object{
         var logText: String = ""
-        val emgEntries = ArrayList<Entry>()
+        val rawEmgEntries = ArrayList<Entry>()
+        val filtredEmgEntries = ArrayList<Entry>()
         val fftEntries = ArrayList<Entry>()
         val accEntries = ArrayList<Entry>()
         val gyrEntries = ArrayList<Entry>()