app/src/main/java/com/stoutner/privacycell/activities/PrivacyCell.kt

   1 /*
   2  * Copyright © 2021 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Cell <https://www.stoutner.com/privacy-cell>.
   5  *
   6  * Privacy Cell is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Cell is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacycell.activities
  21
  22 import android.Manifest
  23 import android.content.Context
  24 import android.content.pm.PackageManager
  25 import android.os.Bundle
  26 import android.telephony.PhoneStateListener
  27 import android.telephony.TelephonyDisplayInfo
  28 import android.telephony.TelephonyManager
  29 import android.widget.TextView
  30
  31 import androidx.appcompat.app.AppCompatActivity
  32 import androidx.core.app.ActivityCompat
  33
  34 import com.stoutner.privacycell.R
  35
  36 class PrivacyCell : AppCompatActivity() {
  37     override fun onCreate(savedInstanceState: Bundle?) {
  38         // Run the default commands.
  39         super.onCreate(savedInstanceState)
  40
  41         // Set the content view.
  42         setContentView(R.layout.privacy_cell_linearlayout)
  43
  44         // Get handles for the views.
  45         val voiceNetworkTextView = findViewById<TextView>(R.id.voice_network)
  46         val dataNetworkTextView = findViewById<TextView>(R.id.data_network)
  47         val additionalNetworkInfoTextView = findViewById<TextView>(R.id.additional_network_info)
  48         val secureFromStingrayTextView = findViewById<TextView>(R.id.secure_from_stingray)
  49
  50         // TODO.
  51         if (ActivityCompat.checkSelfPermission(
  52                 this,
  53                 Manifest.permission.READ_PHONE_STATE
  54             ) != PackageManager.PERMISSION_GRANTED
  55         ) {
  56             // TODO: Consider calling
  57             //    ActivityCompat#requestPermissions
  58             // here to request the missing permissions, and then overriding
  59             //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
  60             //                                          int[] grantResults)
  61             // to handle the case where the user grants the permission. See the documentation
  62             // for ActivityCompat#requestPermissions for more details.
  63             return
  64         }
  65
  66         // Get a handle for the the telephone Manager.
  67         val telephonyManager = getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
  68
  69         // Get the voice network type.
  70         val voiceNetworkType = getNetworkType(telephonyManager.voiceNetworkType)
  71
  72         // Populate the voice network text view.
  73         voiceNetworkTextView.text = getString(R.string.voice_network, voiceNetworkType)
  74
  75         // Listen to changes in the cell network state.
  76         telephonyManager.listen(object : PhoneStateListener() {
  77             override fun onDisplayInfoChanged(telephonyDisplayInfo: TelephonyDisplayInfo) {
  78                 // Get the strings that correspond to the network information.
  79                 val dataNetworkType = getNetworkType(telephonyDisplayInfo.networkType)
  80                 val additionalNetworkInfo = getAdditionalNetworkInfo(telephonyDisplayInfo.overrideNetworkType)
  81
  82                 // Populate the network text views.
  83                 dataNetworkTextView.text = getString(R.string.data_network, dataNetworkType)
  84                 additionalNetworkInfoTextView.text = getString(R.string.additional_network_info, additionalNetworkInfo)
  85
  86                 // Populate the secure from stingray text view.  <https://source.android.com/devices/tech/connect/acts-5g-testing>
  87                 if (telephonyDisplayInfo.networkType == TelephonyManager.NETWORK_TYPE_NR) {
  88                     secureFromStingrayTextView.text = getString(R.string.secure_from_stingray)
  89                 } else {
  90                     secureFromStingrayTextView.text = getString(R.string.not_secure_from_stingray)
  91                 }
  92             }
  93         }, PhoneStateListener.LISTEN_DISPLAY_INFO_CHANGED)
  94     }
  95
  96     private fun getNetworkType(networkType: Int) : String {
  97         // Return the string that corresponds to the network type.
  98         return when(networkType) {
  99             TelephonyManager.NETWORK_TYPE_UNKNOWN -> getString(R.string.unknown)
 100             TelephonyManager.NETWORK_TYPE_GPRS -> getString(R.string.gprs)
 101             TelephonyManager.NETWORK_TYPE_EDGE -> getString(R.string.edge)
 102             TelephonyManager.NETWORK_TYPE_UMTS -> getString(R.string.umts)
 103             TelephonyManager.NETWORK_TYPE_CDMA -> getString(R.string.cdma)
 104             TelephonyManager.NETWORK_TYPE_EVDO_0 -> getString(R.string.evdo_0)
 105             TelephonyManager.NETWORK_TYPE_EVDO_A -> getString(R.string.evdo_a)
 106             TelephonyManager.NETWORK_TYPE_1xRTT -> getString(R.string.rtt)
 107             TelephonyManager.NETWORK_TYPE_HSDPA -> getString(R.string.hsdpa)
 108             TelephonyManager.NETWORK_TYPE_HSUPA -> getString(R.string.hsupa)
 109             TelephonyManager.NETWORK_TYPE_HSPA -> getString(R.string.hspa)
 110             TelephonyManager.NETWORK_TYPE_IDEN -> getString(R.string.iden)
 111             TelephonyManager.NETWORK_TYPE_EVDO_B -> getString(R.string.evdo_b)
 112             TelephonyManager.NETWORK_TYPE_LTE -> getString(R.string.lte)
 113             TelephonyManager.NETWORK_TYPE_EHRPD -> getString(R.string.ehrpd)
 114             TelephonyManager.NETWORK_TYPE_HSPAP -> getString(R.string.hspap)
 115             TelephonyManager.NETWORK_TYPE_GSM -> getString(R.string.gsm)
 116             TelephonyManager.NETWORK_TYPE_TD_SCDMA -> getString(R.string.td_scdma)
 117             TelephonyManager.NETWORK_TYPE_IWLAN -> getString(R.string.iwlan)
 118             TelephonyManager.NETWORK_TYPE_NR -> getString(R.string.nr)
 119             else -> getString(R.string.error)
 120         }
 121     }
 122
 123     private fun getAdditionalNetworkInfo(overrideNetworkType: Int) : String {
 124         // Return the string that corresponds to the override network type.
 125         return when(overrideNetworkType) {
 126             TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NONE -> getString(R.string.none)
 127             TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_LTE_CA -> getString(R.string.lte_ca)
 128             TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_LTE_ADVANCED_PRO -> getString(R.string.lte_advanced_pro)
 129             TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NR_NSA -> getString(R.string.lte_nr_nsa)
 130             TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NR_NSA_MMWAVE -> getString(R.string.lte_nr_nsa_mmwave)
 131             else -> getString(R.string.error)
 132         }
 133     }
 134 }