[android] Read NFC tag containing CHIP setup payload (#3601)

* [android] Read NFC tag containing CHIP setup payload

Read CHIP setup payload encoded as URI NDEF Record with
scheme "ch:". This allows to use exactly the same setup
payload as for QR Code generation.

After a succesful NFC Tag read automatically switch to
the Device Details screen of the app to present decoded
information.

* Fix formatting

src/android/CHIPTool/app/src/main/AndroidManifest.xml

@@ -8,6 +8,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.NFC" />
 
     <application
         android:allowBackup="true"
@@ -23,6 +24,11 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            <intent-filter>
+                <action android:name="android.nfc.action.NDEF_DISCOVERED" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:scheme="ch" /><!-- Process CHIP URIs -->
+            </intent-filter>
         </activity>
         <activity
             android:name="com.google.chip.chiptool.commissioner.CommissionerActivity"

src/android/CHIPTool/app/src/main/java/com/google/chip/chiptool/CHIPToolActivity.kt

@@ -18,16 +18,20 @@
 package com.google.chip.chiptool
 
 import android.content.Intent
+import android.nfc.NdefMessage
+import android.nfc.NfcAdapter
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
+import chip.setuppayload.SetupPayloadParser
 import com.google.chip.chiptool.attestation.AttestationTestFragment
 import com.google.chip.chiptool.clusterclient.OnOffClientFragment
 import com.google.chip.chiptool.commissioner.CommissionerActivity
 import com.google.chip.chiptool.echoclient.EchoClientFragment
 import com.google.chip.chiptool.setuppayloadscanner.BarcodeFragment
 import com.google.chip.chiptool.setuppayloadscanner.CHIPDeviceDetailsFragment
 import com.google.chip.chiptool.setuppayloadscanner.CHIPDeviceInfo
+import com.google.chip.chiptool.setuppayloadscanner.QrCodeInfo
 
 class CHIPToolActivity :
     AppCompatActivity(),
@@ -45,6 +49,9 @@ class CHIPToolActivity :
           .add(R.id.fragment_container, fragment, fragment.javaClass.simpleName)
           .commit()
     }
+
+    if (intent?.action == NfcAdapter.ACTION_NDEF_DISCOVERED)
+      onNfcIntent(intent)
   }
 
   override fun onCHIPDeviceInfoReceived(deviceInfo: CHIPDeviceInfo) {
@@ -89,6 +96,31 @@ class CHIPToolActivity :
         .commit()
   }
 
+  private fun onNfcIntent(intent: Intent?) {
+    // Require 1 NDEF message containing 1 NDEF record
+    val messages = intent?.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)
+    if (messages?.size != 1) return
+
+    val records = (messages[0] as NdefMessage).records
+    if (records.size != 1) return
+
+    // Require NDEF URI record starting with "ch:"
+    val uri = records[0].toUri()
+    if (!uri?.scheme.equals("ch", true)) return
+
+    val setupPayload = SetupPayloadParser().parseQrCode(uri.toString().toUpperCase())
+    val deviceInfo = CHIPDeviceInfo(
+            setupPayload.version,
+            setupPayload.vendorId,
+            setupPayload.productId,
+            setupPayload.discriminator,
+            setupPayload.setupPinCode,
+            setupPayload.optionalQRCodeInfo.mapValues { (_, info) ->  QrCodeInfo(info.tag, info.type, info.data, info.int32) }
+    )
+
+    onCHIPDeviceInfoReceived(deviceInfo)
+  }
+
   companion object {
     var REQUEST_CODE_COMMISSIONING = 0xB003
   }

src/android/CHIPTool/app/src/main/java/com/google/chip/chiptool/setuppayloadscanner/BarcodeFragment.kt

@@ -117,20 +117,13 @@ class BarcodeFragment : Fragment(), CHIPBarcodeProcessor.BarcodeDetectionListene
             stopCamera()
 
             val payload = SetupPayloadParser().parseQrCode(barcode.displayValue)
-
-            val optionalQrCodeInfo = payload.optionalQRCodeInfo
-            val qrCodeInfoMap = HashMap<Int, QrCodeInfo>()
-            optionalQrCodeInfo.forEach { (i, info) ->
-                qrCodeInfoMap[i] = QrCodeInfo(info.tag, info.type, info.data, info.int32)
-            }
-
             val deviceInfo = CHIPDeviceInfo(
                 payload.version,
                 payload.vendorId,
                 payload.productId,
                 payload.discriminator,
                 payload.setupPinCode,
-                qrCodeInfoMap
+                payload.optionalQRCodeInfo.mapValues { (_, info) ->  QrCodeInfo(info.tag, info.type, info.data, info.int32) }
             )
             FragmentUtil.getHost(this, Callback::class.java)?.onCHIPDeviceInfoReceived(deviceInfo)
         }