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- add nfc functionality; - handle nfc message in code reader fragment; - add base fragment with binding;
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58 changes: 58 additions & 0 deletions
58
app/src/main/java/dgca/verifier/app/android/base/BindingFragment.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * ---license-start | ||
| * eu-digital-green-certificates / dgca-verifier-app-android | ||
| * --- | ||
| * Copyright (C) 2021 T-Systems International GmbH and all other contributors | ||
| * --- | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * ---license-end | ||
| * | ||
| * Created by mykhailo.nester on 25/08/2021, 15:19 | ||
| */ | ||
|
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| package dgca.verifier.app.android.base | ||
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| import android.os.Bundle | ||
| import android.view.LayoutInflater | ||
| import android.view.View | ||
| import android.view.ViewGroup | ||
| import androidx.fragment.app.Fragment | ||
| import androidx.viewbinding.ViewBinding | ||
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| abstract class BindingFragment<T : ViewBinding> : Fragment() { | ||
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| private var _binding: T? = null | ||
| val binding get() = _binding!! | ||
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| abstract fun onCreateBinding(inflater: LayoutInflater, container: ViewGroup?): T | ||
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| open fun onDestroyBinding(binding: T) { | ||
| } | ||
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| override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View { | ||
| val innerBinding = onCreateBinding(inflater, container) | ||
| _binding = innerBinding | ||
| return innerBinding.root | ||
| } | ||
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| override fun onDestroyView() { | ||
| val innerBinding = _binding | ||
| if (innerBinding != null) { | ||
| onDestroyBinding(innerBinding) | ||
| } | ||
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| _binding = null | ||
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| super.onDestroyView() | ||
| } | ||
| } |
83 changes: 83 additions & 0 deletions
83
app/src/main/java/dgca/verifier/app/android/nfc/NdefParser.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * ---license-start | ||
| * eu-digital-green-certificates / dgca-verifier-app-android | ||
| * --- | ||
| * Copyright (C) 2021 T-Systems International GmbH and all other contributors | ||
| * --- | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * ---license-end | ||
| * | ||
| * Created by mykhailo.nester on 17/08/2021, 18:52 | ||
| */ | ||
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| package dgca.verifier.app.android.nfc | ||
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| import android.nfc.NdefMessage | ||
| import android.nfc.NdefRecord | ||
| import timber.log.Timber | ||
| import java.io.UnsupportedEncodingException | ||
| import java.util.* | ||
| import kotlin.experimental.and | ||
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| object NdefParser { | ||
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| fun parse(message: NdefMessage): List<ParsedNdefRecord> = getRecords(message.records) | ||
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| private fun getRecords(records: Array<NdefRecord>): List<ParsedNdefRecord> = | ||
| records.map { | ||
| it.parse() ?: object : ParsedNdefRecord { | ||
| override fun str(): String { | ||
| return String(it.payload) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| fun NdefRecord.parse(): ParsedNdefRecord? { | ||
| return if (tnf == NdefRecord.TNF_WELL_KNOWN && Arrays.equals(type, NdefRecord.RTD_TEXT)) { | ||
| try { | ||
| val recordPayload = payload | ||
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| /* | ||
| * payload[0] contains the "Status Byte Encodings" field, per the | ||
| * NFC Forum "Text Record Type Definition" section 3.2.1. | ||
| * | ||
| * bit7 is the Text Encoding Field. | ||
| * | ||
| * if (Bit_7 == 0): The text is encoded in UTF-8 if (Bit_7 == 1): | ||
| * The text is encoded in UTF16 | ||
| * | ||
| * Bit_6 is reserved for future use and must be set to zero. | ||
| * | ||
| * Bits 5 to 0 are the length of the IANA language code. | ||
| */ | ||
| val textEncoding = if (recordPayload[0] and 128.toByte() == 0.toByte()) { | ||
| Charsets.UTF_8 | ||
| } else { | ||
| Charsets.UTF_16 | ||
| } | ||
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| val languageCodeLength: Int = (recordPayload[0] and 63.toByte()).toInt() | ||
| val text = String( | ||
| recordPayload, languageCodeLength + 1, | ||
| recordPayload.size - languageCodeLength - 1, textEncoding | ||
| ) | ||
| return TextRecord(text) | ||
| } catch (e: UnsupportedEncodingException) { | ||
| Timber.w("We got a malformed tag.") | ||
| return null | ||
| } | ||
| } else { | ||
| null | ||
| } | ||
| } |
27 changes: 27 additions & 0 deletions
27
app/src/main/java/dgca/verifier/app/android/nfc/ParsedNdefRecord.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| /* | ||
| * ---license-start | ||
| * eu-digital-green-certificates / dgca-verifier-app-android | ||
| * --- | ||
| * Copyright (C) 2021 T-Systems International GmbH and all other contributors | ||
| * --- | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * ---license-end | ||
| * | ||
| * Created by mykhailo.nester on 17/08/2021, 18:52 | ||
| */ | ||
|
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| package dgca.verifier.app.android.nfc | ||
|
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| interface ParsedNdefRecord { | ||
| fun str(): String | ||
| } |
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