Created
January 18, 2024 18:44
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class MainActivity : ComponentActivity() { | |
private val receiver = MifareCallbackReceiver(::onBroadcast) | |
private var callback = "" | |
private val data = mutableStateListOf<String>() | |
private val inputValue = mutableStateOf(TextFieldValue()) | |
private val inputSector = mutableStateOf(TextFieldValue("1")) | |
private val inputBlock = mutableStateOf(TextFieldValue("0")) | |
private val cardData = mutableStateOf("") | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setupBroadcastReceiver() | |
setContent { | |
LioMifareServiceAndroidTheme { | |
// A surface container using the 'background' color from the theme | |
Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) { | |
Column(Modifier.fillMaxSize()) { | |
Row(Modifier.fillMaxWidth()) { | |
Button(::startReadFlow) { | |
Text("Read") | |
} | |
Spacer(Modifier.width(Dp(4f))) | |
Button(::deactivate) { | |
Text("Deactivate") | |
} | |
Spacer(Modifier.width(Dp(4f))) | |
Button(::clearLogs) { | |
Text("Clear Logs") | |
} | |
} | |
Row(Modifier.fillMaxWidth()) { | |
Column(modifier = Modifier.weight(1f)) { | |
NumericInput("Setor", inputSector) | |
} | |
Spacer(modifier = Modifier.width(Dp(1f))) | |
Column(modifier = Modifier.weight(1f)) { | |
NumericInput("Bloco", inputBlock) | |
} | |
Spacer(modifier = Modifier.width(Dp(1f))) | |
Column(modifier = Modifier.weight(1f)) { | |
NumericInput("Valor", inputValue) | |
} | |
} | |
Row { | |
Spacer(Modifier.width(Dp(2f))) | |
Button(::startWriteFlow) { | |
Text("Write") | |
} | |
Spacer(Modifier.width(Dp(2f))) | |
Button(::startIncrementFlow) { | |
Text("Inc") | |
} | |
Spacer(Modifier.width(Dp(2f))) | |
Button(::startDecrementFlow) { | |
Text("Dec") | |
} | |
} | |
Row { | |
Text("Last Read") | |
} | |
Row { | |
Text(cardData.value) | |
} | |
Spacer(Modifier.height(Dp(16f))) | |
Row { | |
Text("Logs") | |
} | |
LazyColumn(Modifier.fillMaxSize()) { | |
items(data) { | |
Row(Modifier.fillMaxWidth()) { | |
Text(it) | |
} | |
} | |
} | |
} | |
} | |
} | |
} | |
} | |
override fun onDestroy() { | |
super.onDestroy() | |
unregisterReceiver(receiver) | |
} | |
private fun clearLogs() { | |
data.clear() | |
cardData.value = "" | |
} | |
private fun startReadFlow() { | |
callback = "AUTH_CALLBACK_READ" | |
detectCard() | |
} | |
private fun startWriteFlow() { | |
callback = "AUTH_CALLBACK_WRITE" | |
detectCard() | |
} | |
private fun startIncrementFlow() { | |
callback = "AUTH_CALLBACK_INCR" | |
detectCard() | |
} | |
private fun startDecrementFlow() { | |
callback = "AUTH_CALLBACK_DECR" | |
detectCard() | |
} | |
private fun onBroadcast(intent: Intent) { | |
log("Broadcast received") | |
log("> action: ${intent.action}") | |
log("> result: ${intent.getStringExtra("result")}") | |
log("> detail: ${intent.getStringExtra("detail")}") | |
intent.extras?.getByteArray("data")?.let { | |
cardData.value = "${it.toInt()} (${it.toHex()})" | |
log("> data: ${it.toInt()} (${it.toHex()})") | |
log("> data length: ${it.size}") | |
} | |
when (intent.action) { | |
"DETECT_CALLBACK" -> authenticate() | |
"AUTH_CALLBACK_READ" -> readCardData() | |
"AUTH_CALLBACK_WRITE" -> writeData() | |
"AUTH_CALLBACK_INCR" -> increment() | |
"AUTH_CALLBACK_DECR" -> decrement() | |
"READ_CALLBACK" -> log("Card data read finished") | |
"WRITE_CALLBACK" -> log("Card data write finished") | |
"DEACTIVATE_CALLBACK" -> log("All Done") | |
} | |
} | |
private fun setupBroadcastReceiver() { | |
IntentFilter().let { | |
listOf( | |
"$PACKAGE.DETECTING", | |
"$PACKAGE.DETECTED", | |
"DETECT_CALLBACK", | |
"AUTH_CALLBACK_READ", | |
"AUTH_CALLBACK_WRITE", | |
"AUTH_CALLBACK_INCR", | |
"AUTH_CALLBACK_DECR", | |
"READ_CALLBACK", | |
"WRITE_CALLBACK", | |
"INCREMENT_CALLBACK", | |
"DECREMENT_CALLBACK", | |
"DEACTIVATE_CALLBACK", | |
).forEach(it::addAction) | |
ContextCompat.registerReceiver(this, receiver, it, ContextCompat.RECEIVER_EXPORTED) | |
} | |
} | |
private fun detectCard() { | |
log("Calling service -> DETECT") | |
callService("$PACKAGE.DETECT", "DETECT_CALLBACK") | |
} | |
private fun authenticate() { | |
log("Calling service -> AUTHENTICATE") | |
callService("$PACKAGE.AUTHENTICATE", callback) { | |
putExtra("sector", inputSector.value.toByte()) | |
putExtra("key", MifareClassic.KEY_DEFAULT) | |
putExtra("keyType", 'A') | |
} | |
} | |
private fun readCardData() { | |
log("Calling service -> READ") | |
callService("$PACKAGE.READ", "READ_CALLBACK") { | |
putExtra("sector", inputSector.value.toByte()) | |
putExtra("block", inputBlock.value.toByte()) | |
} | |
} | |
private fun writeData() { | |
log("Calling service -> WRITE") | |
callService("$PACKAGE.WRITE", "WRITE_CALLBACK") { | |
putExtra("sector", inputSector.value.toByte()) | |
putExtra("block", inputBlock.value.toByte()) | |
putExtra("data", inputValue.value.text.toInt().toByteArray()) | |
} | |
} | |
private fun increment() { | |
log("Calling service -> INCREMENT") | |
callService("$PACKAGE.INCREMENT", "INCREMENT_CALLBACK") { | |
putExtra("sector", inputSector.value.toByte()) | |
putExtra("block", inputBlock.value.toByte()) | |
putExtra("value", inputValue.value.text.toInt().toByte()) | |
} | |
} | |
private fun decrement() { | |
log("Calling service -> DECREMENT") | |
callService("$PACKAGE.DECREMENT", "DECREMENT_CALLBACK") { | |
putExtra("sector", inputSector.value.toByte()) | |
putExtra("block", inputBlock.value.toByte()) | |
putExtra("value", inputValue.value.text.toInt().toByte()) | |
} | |
} | |
private fun deactivate() { | |
log("Calling service -> DEACTIVATE") | |
callService("$PACKAGE.DEACTIVATE", "DEACTIVATE_CALLBACK") | |
} | |
private fun callService(action: String, cbAction: String, setup: Intent.() -> Unit = {}) { | |
Intent(action) | |
.setPackage("cielo.lio.cashless") | |
.putExtra("cbType", 'B') | |
.putExtra("cbPackage", packageName) | |
.putExtra("cbAction", cbAction) | |
.also(setup) | |
.let(::startService) | |
} | |
private fun log(text: String) { | |
Log.i(TAG, text) | |
data.add(text) | |
} | |
} | |
class MifareCallbackReceiver(private val onBroadcast: (Intent) -> Unit) : BroadcastReceiver() { | |
override fun onReceive(context: Context?, intent: Intent?) { | |
intent?.let(onBroadcast) | |
} | |
} | |
@Composable | |
fun NumericInput(label: String, state: MutableState<TextFieldValue>) { | |
TextField( | |
label = { Text(label) }, | |
value = state.value, | |
keyboardOptions = KeyboardOptions.Default.copy(keyboardType = KeyboardType.Number), | |
onValueChange = { | |
state.value = it | |
}) | |
} | |
fun TextFieldValue.toByte() = this.text.trim().toInt().toByte() | |
fun ByteArray.toHex() = joinToString("") { "%02x".format(it) } | |
fun ByteArray.toInt() = BigInteger(this).toInt() | |
fun Int.toByteArray() = "%02x".format(this).hexToByteArray() | |
fun String.hexToByteArray(): ByteArray = padStart(32, '0').chunked(2).map { it.toInt(16).toByte() }.toByteArray() |
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