flutter_package / mobile_scanner

Go to a project
Toggle navigation Toggle navigation pinning
Navaron Bracke
0cb072c6 1 parent 009b39f8

Clean up activity lifecycle handling

Inline Side-by-side
Showing 1 changed file with 18 additions and 187 deletions
package dev.steenbakker.mobile_scanner
import android.net.Uri
import androidx.camera.core.CameraSelector
import androidx.camera.core.ExperimentalGetImage
import com.google.mlkit.vision.barcode.BarcodeScannerOptions
import dev.steenbakker.mobile_scanner.objects.BarcodeFormats
import dev.steenbakker.mobile_scanner.objects.DetectionSpeed
import io.flutter.embedding.engine.plugins.FlutterPlugin
import io.flutter.embedding.engine.plugins.activity.ActivityAware
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import java.io.File
/** MobileScannerPlugin */
class MobileScannerPlugin : FlutterPlugin, ActivityAware, MethodChannel.MethodCallHandler {
private var flutterPluginBinding: FlutterPlugin.FlutterPluginBinding? = null
class MobileScannerPlugin : FlutterPlugin, ActivityAware {
private var activityPluginBinding: ActivityPluginBinding? = null
private var handler: MobileScanner? = null
private var method: MethodChannel? = null
private lateinit var barcodeHandler: BarcodeHandler
private var analyzerResult: MethodChannel.Result? = null
private val callback: MobileScannerCallback = { barcodes: List<Map<String, Any?>>, image: ByteArray? ->
if (image != null) {
barcodeHandler.publishEvent(mapOf(
"name" to "barcode",
"data" to barcodes,
"image" to image
))
} else {
barcodeHandler.publishEvent(mapOf(
"name" to "barcode",
"data" to barcodes
))
}
}
private val analyzerCallback: AnalyzerCallback = { barcodes: List<Map<String, Any?>>?->
if (barcodes != null) {
barcodeHandler.publishEvent(mapOf(
"name" to "barcode",
"data" to barcodes
))
analyzerResult?.success(true)
} else {
analyzerResult?.success(false)
}
analyzerResult = null
}
private val errorCallback: MobileScannerErrorCallback = {error: String ->
barcodeHandler.publishEvent(mapOf(
"name" to "error",
"data" to error,
))
}
private val torchStateCallback: TorchStateCallback = {state: Int ->
barcodeHandler.publishEvent(mapOf("name" to "torchState", "data" to state))
}
@ExperimentalGetImage
override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
if (handler == null) {
result.error("MobileScanner", "Called ${call.method} before initializing.", null)
return
}
when (call.method) {
"state" -> result.success(handler!!.hasCameraPermission())
"request" -> handler!!.requestPermission(result)
"start" -> start(call, result)
"torch" -> toggleTorch(call, result)
"stop" -> stop(result)
"analyzeImage" -> analyzeImage(call, result)
else -> result.notImplemented()
}
}
private var flutterPluginBinding: FlutterPlugin.FlutterPluginBinding? = null
private var methodCallHandler: MethodCallHandlerImpl? = null
override fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) {
method = MethodChannel(binding.binaryMessenger, "dev.steenbakker.mobile_scanner/scanner/method")
method!!.setMethodCallHandler(this)
barcodeHandler = BarcodeHandler(binding)
this.flutterPluginBinding = binding
}
... ... @@ -95,124 +19,31 @@ class MobileScannerPlugin : FlutterPlugin, ActivityAware, MethodChannel.MethodCa
}
override fun onAttachedToActivity(activityPluginBinding: ActivityPluginBinding) {
handler = MobileScanner(activityPluginBinding.activity, flutterPluginBinding!!.textureRegistry, callback, errorCallback
val binaryMessenger = this.flutterPluginBinding!!.binaryMessenger
methodCallHandler = MethodCallHandlerImpl(
activityPluginBinding.activity,
BarcodeHandler(binaryMessenger),
binaryMessenger,
MobileScannerPermissions(),
activityPluginBinding::addRequestPermissionsResultListener,
this.flutterPluginBinding!!.textureRegistry,
)
activityPluginBinding.addRequestPermissionsResultListener(handler!!)
this.activityPluginBinding = activityPluginBinding
}
override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
onAttachedToActivity(binding)
}
override fun onDetachedFromActivity() {
activityPluginBinding!!.removeRequestPermissionsResultListener(handler!!)
method!!.setMethodCallHandler(null)
method = null
handler = null
methodCallHandler?.dispose(this.activityPluginBinding!!)
methodCallHandler = null
activityPluginBinding = null
}
override fun onDetachedFromActivityForConfigChanges() {
onDetachedFromActivity()
}
@ExperimentalGetImage
private fun start(call: MethodCall, result: MethodChannel.Result) {
val torch: Boolean = call.argument<Boolean>("torch") ?: false
val facing: Int = call.argument<Int>("facing") ?: 0
val formats: List<Int>? = call.argument<List<Int>>("formats")
val returnImage: Boolean = call.argument<Boolean>("returnImage") ?: false
val speed: Int = call.argument<Int>("speed") ?: 1
val timeout: Int = call.argument<Int>("timeout") ?: 250
var barcodeScannerOptions: BarcodeScannerOptions? = null
if (formats != null) {
val formatsList: MutableList<Int> = mutableListOf()
for (index in formats) {
formatsList.add(BarcodeFormats.values()[index].intValue)
}
barcodeScannerOptions = if (formatsList.size == 1) {
BarcodeScannerOptions.Builder().setBarcodeFormats(formatsList.first())
.build()
} else {
BarcodeScannerOptions.Builder().setBarcodeFormats(
formatsList.first(),
*formatsList.subList(1, formatsList.size).toIntArray()
).build()
}
}
val position =
if (facing == 0) CameraSelector.DEFAULT_FRONT_CAMERA else CameraSelector.DEFAULT_BACK_CAMERA
val detectionSpeed: DetectionSpeed = DetectionSpeed.values().first { it.intValue == speed}
try {
handler!!.start(barcodeScannerOptions, returnImage, position, torch, detectionSpeed, torchStateCallback, mobileScannerStartedCallback = {
result.success(mapOf(
"textureId" to it.id,
"size" to mapOf("width" to it.width, "height" to it.height),
"torchable" to it.hasFlashUnit
))
},
timeout.toLong())
} catch (e: AlreadyStarted) {
result.error(
"MobileScanner",
"Called start() while already started",
null
)
} catch (e: NoCamera) {
result.error(
"MobileScanner",
"No camera found or failed to open camera!",
null
)
} catch (e: TorchError) {
result.error(
"MobileScanner",
"Error occurred when setting torch!",
null
)
} catch (e: CameraError) {
result.error(
"MobileScanner",
"Error occurred when setting up camera!",
null
)
} catch (e: Exception) {
result.error(
"MobileScanner",
"Unknown error occurred..",
null
)
}
}
private fun stop(result: MethodChannel.Result) {
try {
handler!!.stop()
result.success(null)
} catch (e: AlreadyStopped) {
result.success(null)
}
}
private fun analyzeImage(call: MethodCall, result: MethodChannel.Result) {
analyzerResult = result
val uri = Uri.fromFile(File(call.arguments.toString()))
handler!!.analyzeImage(uri, analyzerCallback)
override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
onAttachedToActivity(binding)
}
private fun toggleTorch(call: MethodCall, result: MethodChannel.Result) {
try {
handler!!.toggleTorch(call.arguments == 1)
result.success(null)
} catch (e: AlreadyStopped) {
result.error("MobileScanner", "Called toggleTorch() while stopped!", null)
}
override fun onDetachedFromActivityForConfigChanges() {
onDetachedFromActivity()
}
}
... ...