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Added null check on initialization to support background thread scenarios #61

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Added null check on initialization to support background thread scenarios #61

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ec5b67f
Added null check on initialization to support background thread scena…
AntSwift Oct 22, 2019
a2f5941
Added logging in android implementation.
AntSwift Oct 24, 2019
3938d62
Logging build errors.
AntSwift Oct 24, 2019
060e6a5
Logging build errors.
AntSwift Oct 24, 2019
1cd04a6
More logging.
AntSwift Oct 24, 2019
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Added logging in android implementation.
  • Loading branch information
@AntSwift
AntSwift committed Oct 24, 2019
commit a2f5941711bac4c5304c0a6dca18c665f17a22f1
13 changes: 12 additions & 1 deletion android/src/main/kotlin/it/matteocrippa/flutternfcreader/FlutterNfcReaderPlugin.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -17,11 +17,12 @@ import io.flutter.plugin.common.PluginRegistry.Registrar
import java.nio.charset.Charset
import android.os.Looper
import java.io.IOException
import android.util.Log

const val PERMISSION_NFC = 1007

class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, EventChannel.StreamHandler, NfcAdapter.ReaderCallback {

private val logTag = "FlutterNfcReaderPlugin"
private val activity = registrar.activity()

private var nfcAdapter: NfcAdapter? = null
Expand All @@ -48,6 +49,7 @@ class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, Even
companion object {
@JvmStatic
fun registerWith(registrar: Registrar): Unit {
Log.v(logTag, registerWith)
val messenger = registrar.messenger()
val channel = MethodChannel(messenger, "flutter_nfc_reader")
val eventChannel = EventChannel(messenger, "it.matteocrippa.flutternfcreader.flutter_nfc_reader")
Expand All @@ -58,18 +60,22 @@ class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, Even
}

init {
Log.v(logTag, "init")
if(activity != null) {
Log.v(logTag, "have activity")
nfcManager = activity.getSystemService(Context.NFC_SERVICE) as? NfcManager
nfcAdapter = nfcManager?.defaultAdapter

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
Log.v(logTag, "requesting permissions")
activity.requestPermissions(
arrayOf(Manifest.permission.NFC),
PERMISSION_NFC
)
}

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
Log.v(logTag, "enabling reader mode")
nfcAdapter?.enableReaderMode(activity, this, READER_FLAGS, null)
}
}
Expand Down Expand Up @@ -183,7 +189,9 @@ class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, Even


private fun writeTag() {
Log.v(logTag, "writing tag")
if (writeResult != null) {
Log.v(logTag, "have writeResult")
val nfcRecord = NdefRecord(NdefRecord.TNF_EXTERNAL_TYPE, kPath.toByteArray(), ByteArray(0), kWrite.toByteArray())
val nfcMessage = NdefMessage(arrayOf(nfcRecord))
writeMessageToTag(nfcMessage, tag)
Expand All @@ -199,6 +207,7 @@ class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, Even

private fun readTag() {
if (readResult != null) {
Log.v(logTag, "have readResult")
// convert tag to NDEF tag
val ndef = Ndef.get(tag)
ndef?.connect()
Expand All @@ -215,6 +224,7 @@ class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, Even
readResult = null
}
} else {
Log.v(logTag, "readResult null")
// convert tag to NDEF tag
val ndef = Ndef.get(tag)
ndef?.connect()
Expand All @@ -234,6 +244,7 @@ class FlutterNfcReaderPlugin(val registrar: Registrar) : MethodCallHandler, Even

// handle discovered NDEF Tags
override fun onTagDiscovered(tag: Tag?) {
Log.v(logTag, "tag discovered")
this.tag = tag
writeTag()
readTag()
Expand Down
9 changes: 4 additions & 5 deletions example/ios/Flutter/flutter_export_environment.sh
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@@ -1,11 +1,10 @@
#!/bin/sh
# This is a generated file; do not edit or check into version control.
export "FLUTTER_ROOT=/Users/henrysachs/development/flutter"
export "FLUTTER_APPLICATION_PATH=/Users/henrysachs/projekte/flutter/flutter-nfc-reader/example"
export "FLUTTER_TARGET=/Users/henrysachs/projekte/flutter/flutter-nfc-reader/example/lib/main.dart"
export "FLUTTER_ROOT=/Users/anthonyswift/Library/Flutter"
export "FLUTTER_APPLICATION_PATH=/Users/anthonyswift/Documents/Source/flutter-nfc-reader/example"
export "FLUTTER_TARGET=lib/main.dart"
export "FLUTTER_BUILD_DIR=build"
export "SYMROOT=${SOURCE_ROOT}/../build/ios"
export "FLUTTER_FRAMEWORK_DIR=/Users/henrysachs/development/flutter/bin/cache/artifacts/engine/ios"
export "FLUTTER_FRAMEWORK_DIR=/Users/anthonyswift/Library/Flutter/bin/cache/artifacts/engine/ios"
export "FLUTTER_BUILD_NAME=1.0.0"
export "FLUTTER_BUILD_NUMBER=1"
export "TRACK_WIDGET_CREATION=true"