Basic current cell info view

1 files changed, 104 insertions, 0 deletions

diff --git a/app/src/main/java/net/rctt/netmon/MainActivity.kt b/app/src/main/java/net/rctt/netmon/MainActivity.kt
index 53c6f05..7111922 100644
--- a/app/src/main/java/net/rctt/netmon/MainActivity.kt
+++ b/app/src/main/java/net/rctt/netmon/MainActivity.kt
@@ -1,12 +1,34 @@
 package net.rctt.netmon
 
+import android.Manifest
+import android.annotation.SuppressLint
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.telephony.CellInfoGsm
+import android.telephony.CellInfoLte
+import android.telephony.CellInfoNr
+import android.telephony.CellInfoTdscdma
+import android.telephony.CellInfoWcdma
+import android.telephony.TelephonyManager
+import android.util.Log
+import android.widget.LinearLayout
+import android.widget.TextView
 import androidx.activity.enableEdgeToEdge
+import androidx.annotation.RequiresPermission
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import java.text.SimpleDateFormat
+import java.util.Date
 
 class MainActivity : AppCompatActivity() {
+    lateinit var statusView: LinearLayout
+    lateinit var cellView: LinearLayout
+
+    lateinit var tel: TelephonyManager
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
@@ -16,5 +38,87 @@ class MainActivity : AppCompatActivity() {
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
             insets
         }
+
+        statusView = findViewById(R.id.statusView)
+        cellView = findViewById(R.id.cellView)
+
+        val pLoc = ContextCompat.checkSelfPermission(applicationContext, Manifest.permission.ACCESS_FINE_LOCATION)
+        if (pLoc == -1) {
+            log("Location permission required")
+        } else {
+            log("Ready")
+            tel = getSystemService(TELEPHONY_SERVICE) as TelephonyManager
+
+            val mainHandler = Handler(Looper.getMainLooper())
+
+            mainHandler.post(object : Runnable {
+                @RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
+                override fun run() {
+                    refresh()
+                    mainHandler.postDelayed(this, 1000)
+                }
+            })
+        }
+    }
+
+    @RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
+    fun refresh() {
+        log("refreshing")
+
+        val cellList = tel.allCellInfo
+        cellView.removeAllViews()
+        for (cell in cellList) {
+            when (cell) {
+                is CellInfoGsm -> {
+                    logDetected("GSM")
+                }
+                is CellInfoLte -> {
+                    val id = cell.cellIdentity
+                    if (id.ci == 2147483647) {
+                        continue
+                    }
+
+                    logDetected("LTE")
+                    logCell("CID: ${id.ci}")
+                    logCell("PCI: ${id.pci}")
+                    logCell("TAC: ${id.tac}")
+                    logCell("EARFCN ${id.earfcn}")
+                    logCell("BANDWIDTH: ${id.bandwidth}")
+                    logCell("RSRP: ${cell.cellSignalStrength.rsrp}")
+                    logCell("DBM: ${cell.cellSignalStrength.dbm}")
+                    logCell("STATUS: ${cell.cellConnectionStatus}")
+                    logCell("")
+                }
+                is CellInfoNr -> {
+                    logDetected("NR")
+                }
+                is CellInfoTdscdma -> {
+                    logDetected("TDSCDMA")
+                }
+                is CellInfoWcdma -> {
+                    logDetected("WCDMA")
+                }
+            }
+        }
+    }
+
+    @SuppressLint("SimpleDateFormat", "SetTextI18n")
+    fun log(text: String) {
+        val sdf = SimpleDateFormat("hh:mm:ss")
+        val date = sdf.format(Date())
+        val msg = TextView(this)
+        msg.text = "$date $text"
+        statusView.addView(msg)
+    }
+
+    fun logDetected(text: String) {
+        log("detected $text cell")
+    }
+
+    fun logCell(text: String) {
+        val msg = TextView(this)
+        msg.text = text
+        cellView.addView(msg)
+        Log.d("NETMON", text)
     }
 }
\ No newline at end of file