Prevent read/write displaying system NFC "New tag collected" on Android

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 2.0.6
+-   Flutter 2.0 null safety.  This is the first update for null safety so may not fully function.
+
 ## 2.0.5
 
 -   Better reading reliability on iOS

README.md

@@ -1,3 +1,8 @@
+# versions
+I will endeavour to keep this up to date but it's not guaranteed.
+
+Updated to use flutter 2.0 null safety
+
 # nfc_in_flutter
 
 NFC in Flutter is a plugin for reading and writing NFC tags in Flutter. It works on both Android and iOS with a simple stream interface.
@@ -150,7 +155,7 @@ Add `nfc_in_flutter` to your `pubspec.yaml`
 
 ```yaml
 dependencies:
-    nfc_in_flutter: 2.0.5
+    nfc_in_flutter: 2.0.6
 ```
 
 ### iOS

android/gradle.properties

@@ -1 +1,4 @@
 org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true
+android.useAndroidX=true
+android.enableJetifier=true

android/src/main/java/me/andisemler/nfc_in_flutter/NfcInFlutterPlugin.java

@@ -42,10 +42,12 @@
 public class NfcInFlutterPlugin implements MethodCallHandler,
         EventChannel.StreamHandler,
         PluginRegistry.NewIntentListener,
-        NfcAdapter.ReaderCallback {
+        NfcAdapter.ReaderCallback,
+        NfcAdapter.OnTagRemovedListener {
 
     private static final String NORMAL_READER_MODE = "normal";
     private static final String DISPATCH_READER_MODE = "dispatch";
+    private static final int ONE_SECOND = 1000;
     private final int DEFAULT_READER_FLAGS = NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_NFC_B | NfcAdapter.FLAG_READER_NFC_F | NfcAdapter.FLAG_READER_NFC_V;
     private static final String LOG_TAG = "NfcInFlutterPlugin";
 
@@ -55,6 +57,11 @@ public class NfcInFlutterPlugin implements MethodCallHandler,
 
     private String currentReaderMode = null;
     private Tag lastTag = null;
+    private boolean writeIgnore = false;
+
+    @Override
+    public void onTagRemoved() {
+    }
 
     /**
      * Plugin registration.
@@ -84,6 +91,13 @@ public void onMethodCall(MethodCall call, Result result) {
                     return;
                 }
                 HashMap args = (HashMap) call.arguments;
+                Boolean readForWrite = (Boolean) args.get("read_for_write");
+                if (readForWrite != null && readForWrite) {
+                    writeIgnore = true;
+                } else {
+                    writeIgnore = false;
+                }
+
                 String readerMode = (String) args.get("reader_mode");
                 if (readerMode == null) {
                     result.error("MissingReaderMode", "startNDEFReading was called without a reader mode", "");
@@ -205,6 +219,9 @@ public void onTagDiscovered(Tag tag) {
                     Log.e(LOG_TAG, "close NDEF tag error: " + e.getMessage());
                 }
                 eventSuccess(formatNDEFMessageToResult(ndef, message));
+                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N && !writeIgnore) {
+                    adapter.ignore(tag, ONE_SECOND, this, null);
+                }
             } catch (IOException e) {
                 Map<String, Object> details = new HashMap<>();
                 details.put("fatal", true);
@@ -621,6 +638,12 @@ private void writeNDEF(NdefMessage message) throws NfcInFlutterException {
             } finally {
                 try {
                     ndef.close();
+                    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N && writeIgnore) {
+                        adapter = NfcAdapter.getDefaultAdapter(activity);
+                        if (adapter != null) {
+                            adapter.ignore(lastTag, ONE_SECOND, this, null);
+                        }
+                    }
                 } catch (IOException e) {
                     Log.e(LOG_TAG, "close NDEF tag error: " + e.getMessage());
                 }

example/android/build.gradle

@@ -5,7 +5,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:4.1.2'
     }
 }
 

example/android/gradle.properties

@@ -1,2 +1,4 @@
 org.gradle.jvmargs=-Xmx1536M
 android.enableR8=true
+android.useAndroidX=true
+android.enableJetifier=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Jun 23 08:50:38 CEST 2017
+#Thu Mar 04 20:57:51 GMT 2021
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

example/ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-# platform :ios, '9.0'
+# platform :ios, '10.12'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'

example/ios/Podfile.lock

@@ -19,4 +19,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 3dbe063e9c90a5d7c9e4e76e70a821b9e2c1d271
 
-COCOAPODS: 1.9.1
+COCOAPODS: 1.10.1

example/ios/Runner.xcodeproj/project.pbxproj

@@ -318,7 +318,6 @@
 /* Begin XCBuildConfiguration section */
 		249021D3217E4FDB00AE95B9 /* Profile */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -356,7 +355,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				OTHER_LDFLAGS = (
 					"$(inherited)",
@@ -409,7 +408,6 @@
 		};
 		97C147031CF9000F007C117D /* Debug */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -453,7 +451,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_LDFLAGS = (
@@ -472,7 +470,6 @@
 		};
 		97C147041CF9000F007C117D /* Release */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -510,7 +507,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				OTHER_LDFLAGS = (
 					"$(inherited)",

example/lib/main.dart

@@ -19,6 +19,13 @@ class ExampleApp extends StatelessWidget {
         body: Builder(builder: (context) {
           return ListView(
             children: <Widget>[
+              ListTile(
+                title: const Text("NFC Supported"),
+                onTap: () async {
+                  bool supported = await NFC.isNDEFSupported;
+                  ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('NFC supported = ${supported}')));
+                },
+              ),
               ListTile(
                 title: const Text("Read NFC"),
                 onTap: () {