From e787e83e781c999c0555e1db5e99ac5685a84536 Mon Sep 17 00:00:00 2001
From: bt <bt@rctt.net>
Date: Tue, 26 May 2026 23:13:08 +0200
Subject: Load netmonitor CSV database and show cells descriptions

---
 app/src/main/AndroidManifest.xml                  |   4 +
 app/src/main/java/net/rctt/netmon/CellDbItem.kt   |  31 ++++++
 app/src/main/java/net/rctt/netmon/CellView.kt     |   9 +-
 app/src/main/java/net/rctt/netmon/MainActivity.kt |  93 ++++++++++++++++--
 app/src/main/res/layout/cell_view.xml             | 111 ++++++++++++----------
 5 files changed, 186 insertions(+), 62 deletions(-)
 create mode 100644 app/src/main/java/net/rctt/netmon/CellDbItem.kt

(limited to 'app/src')

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index f8bbdd0..32d8332 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -5,8 +5,12 @@
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
 
     <application
+        android:requestLegacyExternalStorage="true"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
diff --git a/app/src/main/java/net/rctt/netmon/CellDbItem.kt b/app/src/main/java/net/rctt/netmon/CellDbItem.kt
new file mode 100644
index 0000000..2922bb1
--- /dev/null
+++ b/app/src/main/java/net/rctt/netmon/CellDbItem.kt
@@ -0,0 +1,31 @@
+package net.rctt.netmon
+
+// NETWORK_TYPE;MCC;MNC;LAC;CID;PSC;CHANNEL;LATITUDE;LONGITUDE;ACCURACY;DESCRIPTION
+
+/*
+NETWORK_TYPE 	String 	C (CDMA), G (GSM), W (WCDMA), T (TDSCDMA), L (LTE), N (5G NR) 	Mandatory for CDMA
+MCC 	String 	3 digits 	Mandatory
+MNC 	String 	2 or 3 digits 	Mandatory
+LAC 	Int 	NID (CDMA), LAC (GSM, WCDMA, TDSCDMA), TAC (LTE, 5G NR) 	Mandatory
+CID 	Long 	BID (CDMA), CID (GSM, WCDMA, TDSCDMA), CI (LTE), NCI (5G NR) 	Mandatory
+PSC 	Int 	SID (CDMA), BSIC (GSM), PSC (WCDMA), CPID (TDSCDMA), PCI (LTE, 5G NR) 	Mandatory for CDMA
+CHANNEL 	Int 	ARFCN (GSM, 5G NR), UARFCN (WCDMA, TDSCDMA), EARFCN (LTE)
+LATITUDE 	Double 	[-90;90], . as separator
+LONGITUDE 	Double 	[-180;180], . as separator
+ACCURACY 	Int 	in meters
+DESCRIPTION 	String 	text
+*/
+
+class CellDbItem {
+    var Type: String = ""
+    var MCC: String = ""
+    var MNC: String = ""
+    var LAC: Int = 0
+    var CID: Long = 0
+    var PSC: Int = 0
+    var Channel: Int = 0
+    var Latitude: Double = 0.0
+    var Longitude: Double = 0.0
+    var Accuracy: Int = 0
+    var Description: String = ""
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/rctt/netmon/CellView.kt b/app/src/main/java/net/rctt/netmon/CellView.kt
index d991d48..051f05a 100644
--- a/app/src/main/java/net/rctt/netmon/CellView.kt
+++ b/app/src/main/java/net/rctt/netmon/CellView.kt
@@ -23,6 +23,8 @@ class CellView : ConstraintLayout{
     var typeView: TextView
     var idView: TextView
     var powerView: TextView
+    var descView: TextView
+
     var powerChartView: XYPlot
     var powerChartSeries: SimpleXYSeries
 
@@ -34,6 +36,7 @@ class CellView : ConstraintLayout{
         typeView = findViewById(R.id.type)
         idView = findViewById(R.id.id)
         powerView = findViewById(R.id.power)
+        descView = findViewById(R.id.desc)
         powerChartView = findViewById(R.id.power_chart)
         powerHistory = mutableListOf()
         powerChartSeries= SimpleXYSeries(
@@ -76,6 +79,10 @@ class CellView : ConstraintLayout{
         powerView.text = power.toString()
     }
 
+    fun setDesc(desc: String) {
+        descView.text = desc
+    }
+
     fun refresh() {
         powerChartView.removeSeries(powerChartSeries)
 
@@ -96,8 +103,6 @@ class CellView : ConstraintLayout{
 
         val series1Format = LineAndPointFormatter(Color.RED, Color.GREEN, Color.BLUE, null)
 
-        Log.d("ASD", seriesData.toString())
-
         powerChartView.addSeries(powerChartSeries, series1Format)
     }
 
diff --git a/app/src/main/java/net/rctt/netmon/MainActivity.kt b/app/src/main/java/net/rctt/netmon/MainActivity.kt
index bc0f136..66d77c6 100644
--- a/app/src/main/java/net/rctt/netmon/MainActivity.kt
+++ b/app/src/main/java/net/rctt/netmon/MainActivity.kt
@@ -14,6 +14,7 @@ import android.telephony.CellInfoTdscdma
 import android.telephony.CellInfoWcdma
 import android.telephony.TelephonyManager
 import android.telephony.TelephonyManager.CellInfoCallback
+import android.util.Log
 import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.activity.enableEdgeToEdge
@@ -22,6 +23,12 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import com.jsoizo.kotlincsv.CsvDialect
+import com.jsoizo.kotlincsv.csvReader
+import com.jsoizo.kotlincsv.reader.readFromFile
+import java.io.File
+import java.io.IOException
+import java.lang.reflect.Type
 import java.text.SimpleDateFormat
 import java.util.Date
 
@@ -29,6 +36,7 @@ class MainActivity : AppCompatActivity() {
     lateinit var cellsListView: LinearLayout
     lateinit var tel: TelephonyManager
     lateinit var cellsList: HashMap<Number, CellView>
+    val cellDb = HashMap<Int, HashMap<Long, CellDbItem>>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -40,6 +48,8 @@ class MainActivity : AppCompatActivity() {
             insets
         }
 
+        loadDb()
+
         cellsList = HashMap()
         cellsListView = findViewById(R.id.cellsList)
 
@@ -56,13 +66,53 @@ class MainActivity : AppCompatActivity() {
         })
     }
 
+    fun loadDb() {
+        val reader = csvReader {
+            dialect = CsvDialect(delimiter = ';')
+        }
+
+        reader.readFromFile(File("/storage/emulated/0/cells.csv")) { rows ->
+            rows.forEach {
+                val item = CellDbItem()
+                item.Type = it.elementAt(0)
+                item.MCC = it.elementAt(1)
+                item.MNC = it.elementAt(2)
+                item.LAC = it.elementAt(3).toInt()
+                item.CID = it.elementAt(4).toLong()
+                if (it.elementAt(5) != "") {
+                    item.PSC = it.elementAt(5).toInt()
+                }
+                if (it.elementAt(6) != "") {
+                    item.Channel = it.elementAt(6).toInt()
+                }
+                item.Latitude = it.elementAt(7).toDouble()
+                item.Longitude = it.elementAt(8).toDouble()
+                if (it.elementAt(9) != "") {
+                    item.Accuracy = it.elementAt(9).toInt()
+                }
+                item.Description = it.elementAt(10)
+
+                var lac = cellDb[item.LAC]
+                if (lac == null) {
+                    cellDb[item.LAC] = HashMap()
+                    lac = cellDb[item.LAC]
+                }
+
+                lac?.set(item.CID, item)
+            }
+        }
+    }
+
+    fun findInDb(lac: Int, cid: Long): CellDbItem?  {
+        return cellDb[lac]?.get(cid)
+    }
+
     @RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
     fun refresh() {
         tel.requestCellInfoUpdate(mainExecutor, object : CellInfoCallback() {
             @RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
             override fun onCellInfo(cellList: List<CellInfo?>) {
                 cellsListView.removeAllViews()
-
                 for (cell in cellList) {
                     if (cell == null) {
                         continue
@@ -74,35 +124,58 @@ class MainActivity : AppCompatActivity() {
     }
 
     @SuppressLint("SetTextI18n")
-    fun addCellView(cell :CellInfo){
+    fun addCellView(cell: CellInfo) {
         val id = getCellId(cell)
+        if (id == 65535 || id == 2147483647) {
+            return
+        }
+
+        val lac = getCellLac(cell)
+        val findInDb = findInDb(lac.toInt(), id.toLong())
+        val desc = findInDb?.Description ?: ""
+
         var cellView = cellsList[id]
         if (cellView == null) {
             cellView = CellView(this, id)
             cellsList[id] = cellView
+        } else {
+            cellsListView.removeView(cellView)
         }
 
         when (cell) {
             is CellInfoGsm -> cellView.set(cell)
-            is CellInfoLte ->  cellView.set(cell)
-            is CellInfoNr ->  cellView.set(cell)
-            is CellInfoTdscdma ->  cellView.set(cell)
-            is CellInfoWcdma ->  cellView.set(cell)
+            is CellInfoLte -> cellView.set(cell)
+            is CellInfoNr -> cellView.set(cell)
+            is CellInfoTdscdma -> cellView.set(cell)
+            is CellInfoWcdma -> cellView.set(cell)
         }
 
         cellView.refresh()
+        cellView.setDesc(desc)
         cellsListView.addView(cellView)
     }
 }
 
-fun getCellId(cell: CellInfo) : Number {
+fun getCellId(cell: CellInfo): Number {
     when (cell) {
         is CellInfoGsm -> return cell.cellIdentity.cid
-        is CellInfoLte ->  return cell.cellIdentity.ci
-        is CellInfoNr ->  return (cell.cellIdentity as CellIdentityNr).nci
-        is CellInfoTdscdma ->  return cell.cellIdentity.cid
+        is CellInfoLte -> return cell.cellIdentity.ci
+        is CellInfoNr -> return (cell.cellIdentity as CellIdentityNr).nci
+        is CellInfoTdscdma -> return cell.cellIdentity.cid
         is CellInfoWcdma -> return cell.cellIdentity.cid
     }
 
+    return 0
+}
+
+fun getCellLac(cell: CellInfo): Number {
+    when (cell) {
+        is CellInfoGsm -> return cell.cellIdentity.lac
+        is CellInfoLte -> return cell.cellIdentity.tac
+        is CellInfoNr -> return (cell.cellIdentity as CellIdentityNr).tac
+        is CellInfoTdscdma -> return cell.cellIdentity.lac
+        is CellInfoWcdma -> return cell.cellIdentity.lac
+    }
+
     return 0
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/cell_view.xml b/app/src/main/res/layout/cell_view.xml
index 7361930..916f8cc 100644
--- a/app/src/main/res/layout/cell_view.xml
+++ b/app/src/main/res/layout/cell_view.xml
@@ -13,73 +13,84 @@
 
         <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
+            android:layout_height="match_parent"
+            android:orientation="vertical">
 
             <LinearLayout
-                android:layout_width="wrap_content"
+                android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginEnd="10dp"
-                android:orientation="vertical">
-
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="Type" />
+                android:orientation="horizontal">
 
-                <TextView
+                <LinearLayout
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:text="Id" />
+                    android:layout_marginEnd="10dp"
+                    android:orientation="vertical">
 
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="Power" />
-
-            </LinearLayout>
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="Type" />
 
-            <LinearLayout
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:orientation="vertical">
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="Id" />
 
-                <TextView
-                    android:id="@+id/type"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="type" />
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="Power" />
 
-                <TextView
-                    android:id="@+id/id"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="id" />
+                </LinearLayout>
 
-                <TextView
-                    android:id="@+id/power"
+                <LinearLayout
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:text="power" />
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:id="@+id/type"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="type" />
+
+                    <TextView
+                        android:id="@+id/id"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="id" />
+
+                    <TextView
+                        android:id="@+id/power"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="power" />
+
+                </LinearLayout>
+
+                <com.androidplot.xy.XYPlot
+                    android:id="@+id/power_chart"
+                    style="@style/APDefacto.Dark"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_marginHorizontal="10dp"
+                    ap:graphHeightMode="fill"
+                    ap:graphMarginBottom="-20dp"
+                    ap:graphMarginLeft="-20dp"
+                    ap:graphMarginRight="10dp"
+                    ap:graphMarginTop="0dp"
+                    ap:graphWidthMode="fill"
+                    ap:legendVisible="false"
+                    ap:lineLabels="" />
 
             </LinearLayout>
 
-            <com.androidplot.xy.XYPlot
-                style="@style/APDefacto.Dark"
-                android:id="@+id/power_chart"
+            <TextView
+                android:id="@+id/desc"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_marginHorizontal="10dp"
-                ap:graphHeightMode="fill"
-                ap:graphWidthMode="fill"
-                ap:legendVisible="false"
-                ap:graphMarginTop="0dp"
-                ap:graphMarginBottom="-20dp"
-                ap:graphMarginLeft="-20dp"
-                ap:graphMarginRight="10dp"
-                ap:lineLabels=""
-                />
-
+                android:layout_height="wrap_content"
+                android:text="desc" />
         </LinearLayout>
 
         <View
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