Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

run blocking methods in a background thread #19

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

run blocking methods in a background thread #19

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
112 changes: 71 additions & 41 deletions android/src/main/kotlin/io/flutter/plugins/nfc_manager/NfcManagerPlugin.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,8 @@ import android.nfc.tech.NfcF
import android.nfc.tech.NfcV
import android.nfc.tech.TagTechnology
import android.os.Build
import android.os.Handler
import android.os.Looper
import androidx.annotation.NonNull
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
Expand All @@ -19,6 +21,7 @@ import io.flutter.plugin.common.PluginRegistry.Registrar
import java.io.IOException
import java.lang.reflect.InvocationTargetException
import java.util.*
import kotlin.concurrent.thread

class NfcManagerPlugin(private val registrar: Registrar, private val channel: MethodChannel): MethodCallHandler {
private val adapter = NfcAdapter.getDefaultAdapter(registrar.context())
Expand All @@ -34,20 +37,23 @@ class NfcManagerPlugin(private val registrar: Registrar, private val channel: Me
}

override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
// Send results via the main thread
val _result = MethodResultWrapper(result)

when (call.method) {
"isAvailable" -> handleIsAvailable(call, result)
"startNdefSession" -> handleStartNdefSession(call, result)
"startTagSession" -> handleStartTagSession(call, result)
"stopSession" -> handleStopSession(call, result)
"disposeTag" -> handleDisposeTag(call, result)
"Ndef#write" -> handleNdefWrite(call, result)
"Ndef#writeLock" -> handleNdefWriteLock(call, result)
"NfcA#transceive" -> handleTransceive(NfcA::class.java, call, result)
"NfcB#transceive" -> handleTransceive(NfcB::class.java, call, result)
"NfcF#transceive" -> handleTransceive(NfcF::class.java, call, result)
"NfcV#transceive" -> handleTransceive(NfcV::class.java, call, result)
"IsoDep#transceive" -> handleTransceive(IsoDep::class.java, call, result)
else -> result.notImplemented()
"isAvailable" -> handleIsAvailable(call, _result)
"startNdefSession" -> handleStartNdefSession(call, _result)
"startTagSession" -> handleStartTagSession(call, _result)
"stopSession" -> handleStopSession(call, _result)
"disposeTag" -> handleDisposeTag(call, _result)
"Ndef#write" -> handleNdefWrite(call, _result)
"Ndef#writeLock" -> handleNdefWriteLock(call, _result)
"NfcA#transceive" -> handleTransceive(NfcA::class.java, call, _result)
"NfcB#transceive" -> handleTransceive(NfcB::class.java, call, _result)
"NfcF#transceive" -> handleTransceive(NfcF::class.java, call, _result)
"NfcV#transceive" -> handleTransceive(NfcV::class.java, call, _result)
"IsoDep#transceive" -> handleTransceive(IsoDep::class.java, call, _result)
else -> _result.notImplemented()
}
}

Expand Down Expand Up @@ -99,14 +105,16 @@ class NfcManagerPlugin(private val registrar: Registrar, private val channel: Me
return
}

connectedTech?.let { tech ->
if (tech.tag == tag && tech.isConnected) {
try { tech.close() } catch (e: IOException) { /* Do nothing */ }
thread {
connectedTech?.let { tech ->
if (tech.tag == tag && tech.isConnected) {
try { tech.close() } catch (e: IOException) { /* Do nothing */ }
}
connectedTech = null
}
connectedTech = null
}

result.success(true)
result.success(true)
}
}

private fun handleNdefWrite(@NonNull call: MethodCall, @NonNull result: Result) {
Expand All @@ -123,12 +131,14 @@ class NfcManagerPlugin(private val registrar: Registrar, private val channel: Me
return
}

try {
forceConnect(tech)
tech.writeNdefMessage(ndefMessageFrom(message))
result.success(true)
} catch (e: IOException) {
result.error("io_exception", e.localizedMessage, null)
thread {
try {
forceConnect(tech)
tech.writeNdefMessage(ndefMessageFrom(message))
result.success(true)
} catch (e: IOException) {
result.error("io_exception", e.localizedMessage, null)
}
}
}

Expand All @@ -145,12 +155,14 @@ class NfcManagerPlugin(private val registrar: Registrar, private val channel: Me
return
}

try {
forceConnect(tech)
tech.makeReadOnly()
result.success(true)
} catch (e: IOException) {
result.error("io_exception", e.localizedMessage, null)
thread {
try {
forceConnect(tech)
tech.makeReadOnly()
result.success(true)
} catch (e: IOException) {
result.error("io_exception", e.localizedMessage, null)
}
}
}

Expand All @@ -168,16 +180,18 @@ class NfcManagerPlugin(private val registrar: Registrar, private val channel: Me
return
}

try {
val transceiveMethod = techClass.getMethod("transceive", ByteArray::class.java)
forceConnect(tech)
result.success(transceiveMethod.invoke(tech, data))
} catch (e: IOException) {
result.error("io_exception", e.localizedMessage, null)
} catch (e: IllegalAccessException) {
result.error("illegal_access_exception", e.localizedMessage, null)
} catch (e: InvocationTargetException) {
result.error("invocation_target_exception", e.localizedMessage, null)
thread {
try {
val transceiveMethod = techClass.getMethod("transceive", ByteArray::class.java)
forceConnect(tech)
result.success(transceiveMethod.invoke(tech, data))
} catch (e: IOException) {
result.error("io_exception", e.localizedMessage, null)
} catch (e: IllegalAccessException) {
result.error("illegal_access_exception", e.localizedMessage, null)
} catch (e: InvocationTargetException) {
result.error("invocation_target_exception", e.localizedMessage, null)
}
}
}

Expand All @@ -193,4 +207,20 @@ class NfcManagerPlugin(private val registrar: Registrar, private val channel: Me
connectedTech = tech
}
}

private class MethodResultWrapper internal constructor(private val methodResult: Result) : Result {
private val handler: Handler = Handler(Looper.getMainLooper())

override fun success(result: Any?) {
handler.post { methodResult.success(result) }
}

override fun error(errorCode: String, errorMessage: String?, errorDetails: Any?) {
handler.post { methodResult.error(errorCode, errorMessage, errorDetails) }
}

override fun notImplemented() {
handler.post { methodResult.notImplemented() }
}
}
}