Seil0/ProjectLaogai
1
0
Fork 0
Code Issues 4 Pull Requests Releases 13 Wiki Activity

first working implementation of the mensa card reader

Browse Source 
* based on farebot's desfire protocol implementation
* see #21
This commit is contained in:
Jannik
2019-08-17 18:59:28 +02:00
parent 3a0a31f781
commit 733b675ffa
11 changed files with 1185 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
app/src/main/java/org/mosad/seil0/projectlaogai/MainActivity.kt
View File

@ -22,9 +22,12 @@
package org.mosad.seil0.projectlaogai
import android.content.Intent
import android.graphics.Color
import android.nfc.NdefMessage
import android.nfc.NfcAdapter
import android.nfc.Tag
import android.nfc.tech.IsoDep
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
@ -35,6 +38,7 @@ import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentTransaction
import com.afollestad.aesthetic.Aesthetic
import com.afollestad.materialdialogs.MaterialDialog
import com.codebutler.farebot.card.desfire.DesfireProtocol
import com.google.android.material.navigation.NavigationView
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.app_bar_main.*
@ -44,6 +48,10 @@ import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cColorPrimary
import org.mosad.seil0.projectlaogai.fragments.*
import kotlin.system.measureTimeMillis
import com.codebutler.farebot.Utils.selectAppFile
import com.codebutler.farebot.card.desfire.DesfireFileSettings
import java.lang.Exception
// TODO save the current fragment to show it when the app is restarted
class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
@ -74,16 +82,50 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
nav_view.setNavigationItemSelectedListener(this)
// TODO nfc stuff, needs to move to it's own function
if (intent.action == NfcAdapter.ACTION_TECH_DISCOVERED) {
if (NfcAdapter.ACTION_TECH_DISCOVERED == intent.action) {
val appId = 0x5F8415
val fileId = 1
val tag: Tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG)
MaterialDialog(this)
.title(text = "nfc tag detected")
.message(text = tag.toString())
.show()
val isoDep = IsoDep.get(tag)
isoDep.connect()
val card = DesfireProtocol(isoDep)
val settings = selectAppFile(card, appId, fileId)
if (settings is DesfireFileSettings.ValueDesfireFileSettings) {
val data = try {
card.readValue(fileId)
} catch (ex: Exception) { 0 }
MaterialDialog(this)
.title(text = "Mensa balance")
.message(text = "current: ${data / 1000}.${(data % 1000) / 10}€\n" +
"latest: ${settings.value / 1000}.${(settings.value % 1000) / 10}€")
.show()
}
}
}
override fun onNewIntent(intent: Intent) {
super.onNewIntent(intent)
if (NfcAdapter.ACTION_TECH_DISCOVERED == intent.action) {
intent.getParcelableArrayExtra(NfcAdapter.EXTRA_TAG)?.also { rawMessages ->
val messages: List<NdefMessage> = rawMessages.map { it as NdefMessage }
// Process the messages array.
MaterialDialog(this)
.title(text = "nfc tag detected (onNewIntent)")
.message(text = messages[0].toString())
.show()
}
}
}
override fun onResume() {
super.onResume()
Aesthetic.resume(this)