iOS 平台实现 (#2)

* 修复 UUID 创建失败的问题 * 移除 scanning 属性 * 临时提交 * CentralManager 开发 & 示例项目开发 * CentralManager 开发 & 示例项目开发 * android 插件生命周期监听 * 修改 API * 示例程序开发 * 修改字体，添加 API，解决后台问题 * Central#connect API * 蓝牙连接部分开发 * 蓝牙连接部分开发 * 解决一些问题 * 解决一些问题 * Connect API 优化 * 添加 API * example 开发 * API 基本完成 * 消息重命名 * API 修改，Android 实现 * 删除多余代码 * 删除多余文件 * 解决 descriptor 自动生成报错的问题 * 还原 Kotlin 版本，广播处理代码迁移至 dart 端 * Kotlin 版本升至 1.5.20 * 解决特征值通知没有在主线程触发的问题，优化代码 * 引入哈希值，避免对象销毁后继续使用 * 使用下拉刷新代替搜索按钮 * 解决由于热重载和蓝牙关闭产生的问题 * 更新插件信息 * 更新 README 和 CHANGELOG * 更新许可证 * 添加注释 * 添加注释，central 拆分 * dartfmt -w . * flutter build ios --no-codesign * API 重构 * 添加 connectable 属性 * Android 8.0 之前无法获取 connectable 属性 * 解决合并错误 * 解决连接时可能引发异常的一个问题，iOS 开发 * API 修改，TODO: iOS 哈希值为 64 位无法用 Int32 表示 * iOS 开发 * iOS 开发完成，使用 UUID 实现对象映射 * 更新版本记录和文档
2021-07-15 20:18:49 +08:00
parent aaed38e1eb
commit fc35f74488
63 changed files with 10278 additions and 5267 deletions
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.5.20'
+    ext.kotlin_version = '1.5.21'
    repositories {
        google()
        mavenCentral()
--- a/example/ios/Flutter/Debug.xcconfig
+++ b/example/ios/Flutter/Debug.xcconfig
@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"
--- a/example/ios/Flutter/Release.xcconfig
+++ b/example/ios/Flutter/Release.xcconfig
@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"
--- a/example/ios/Podfile
+++ b/example/ios/Podfile
@ -0,0 +1,41 @@
+# Uncomment this line to define a global platform for your project
+platform :ios, '9.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end
--- a/example/ios/Podfile.lock
+++ b/example/ios/Podfile.lock
@ -0,0 +1,29 @@
+PODS:
+  - bluetooth_low_energy (0.0.1):
+    - Flutter
+    - SwiftProtobuf (~> 1.0)
+  - Flutter (1.0.0)
+  - SwiftProtobuf (1.17.0)
+
+DEPENDENCIES:
+  - bluetooth_low_energy (from `.symlinks/plugins/bluetooth_low_energy/ios`)
+  - Flutter (from `Flutter`)
+
+SPEC REPOS:
+  trunk:
+    - SwiftProtobuf
+
+EXTERNAL SOURCES:
+  bluetooth_low_energy:
+    :path: ".symlinks/plugins/bluetooth_low_energy/ios"
+  Flutter:
+    :path: Flutter
+
+SPEC CHECKSUMS:
+  bluetooth_low_energy: 9222b99f977897165e6ffaece386bd289ac8c1fb
+  Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
+  SwiftProtobuf: 9c85136c6ba74b0a1b84279dbf0f6db8efb714e0
+
+PODFILE CHECKSUM: a75497545d4391e2d394c3668e20cfb1c2bbd4aa
+
+COCOAPODS: 1.10.1
--- a/example/ios/Runner.xcodeproj/project.pbxproj
+++ b/example/ios/Runner.xcodeproj/project.pbxproj
@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 46;
+	objectVersion = 51;
 	objects = {

 /* Begin PBXBuildFile section */
@ -13,6 +13,7 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		EA280E36114EEC52A66510AF /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2F6363DB0F6B8F760A0B70E6 /* Pods_Runner.framework */; };
 /* End PBXBuildFile section */

 /* Begin PBXCopyFilesBuildPhase section */
@ -29,8 +30,10 @@
 /* End PBXCopyFilesBuildPhase section */

 /* Begin PBXFileReference section */
+		1173070BE6CFE927D74C0736 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
+		2F6363DB0F6B8F760A0B70E6 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@ -42,6 +45,8 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		9E8C4C982EC9200D28D9557C /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		FA6DAFE6FDB9F8D1C4A8AEF3 /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */

 /* Begin PBXFrameworksBuildPhase section */
@ -49,6 +54,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				EA280E36114EEC52A66510AF /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@ -72,6 +78,8 @@
 				9740EEB11CF90186004384FC /* Flutter */,
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
+				A19CF493038BEE74587FB0E8 /* Pods */,
+				990CDB7BA621E0B7AFA0C6BE /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@ -98,6 +106,24 @@
 			path = Runner;
 			sourceTree = "<group>";
 		};
+		990CDB7BA621E0B7AFA0C6BE /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				2F6363DB0F6B8F760A0B70E6 /* Pods_Runner.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		A19CF493038BEE74587FB0E8 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				FA6DAFE6FDB9F8D1C4A8AEF3 /* Pods-Runner.debug.xcconfig */,
+				1173070BE6CFE927D74C0736 /* Pods-Runner.release.xcconfig */,
+				9E8C4C982EC9200D28D9557C /* Pods-Runner.profile.xcconfig */,
+			);
+			path = Pods;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */

 /* Begin PBXNativeTarget section */
@ -105,12 +131,14 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				4DEF012D22BCBC3AF731DE9C /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				EDB3731BEABF1E16CE6A52EB /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@ -183,6 +211,28 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
 		};
+		4DEF012D22BCBC3AF731DE9C /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@ -197,6 +247,23 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
 		};
+		EDB3731BEABF1E16CE6A52EB /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */

 /* Begin PBXSourcesBuildPhase section */
@ -288,9 +355,13 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = JJSB6LL9HD;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = dev.yanshouwang.bluetoothLowEnergyExample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
@ -399,7 +470,8 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 			};
@ -412,9 +484,13 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = JJSB6LL9HD;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = dev.yanshouwang.bluetoothLowEnergyExample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
@ -431,9 +507,13 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = JJSB6LL9HD;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = dev.yanshouwang.bluetoothLowEnergyExample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
--- a/example/ios/Runner.xcworkspace/contents.xcworkspacedata
+++ b/example/ios/Runner.xcworkspace/contents.xcworkspacedata
@ -4,4 +4,7 @@
   <FileRef
      location = "group:Runner.xcodeproj">
   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
 </Workspace>
--- a/example/ios/Runner/Info.plist
+++ b/example/ios/Runner/Info.plist
@ -22,6 +22,8 @@
 	<string>$(FLUTTER_BUILD_NUMBER)</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSBluetoothAlwaysUsageDescription</key>
+	<string>We need to use your bluetooth to communicate with other BLE devices.</string>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@ -27,24 +27,33 @@ class HomeView extends StatefulWidget {
 }

 class _HomeViewState extends State<HomeView> with WidgetsBindingObserver {
+  final ValueNotifier<bool> state;
  final ValueNotifier<bool> discovering;
-  final ValueNotifier<Map<MAC, Discovery>> discoveries;
-  late StreamSubscription<bool> stateSubscription;
+  final ValueNotifier<Map<UUID, Discovery>> discoveries;
+  late StreamSubscription<BluetoothState> stateSubscription;
  late StreamSubscription<Discovery> discoverySubscription;

  _HomeViewState()
-      : discovering = ValueNotifier(false),
+      : state = ValueNotifier(false),
+        discovering = ValueNotifier(false),
        discoveries = ValueNotifier({});

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance!.addObserver(this);
+    setup();
+  }
+
+  void setup() async {
+    final state = await central.state;
+    this.state.value = state == BluetoothState.poweredOn;
    stateSubscription = central.stateChanged.listen(
      (state) {
+        this.state.value = state == BluetoothState.poweredOn;
        final invisible = !ModalRoute.of(context)!.isCurrent;
        if (invisible) return;
-        if (state) {
+        if (this.state.value) {
          startDiscovery();
        } else {
          discovering.value = false;
@ -53,11 +62,13 @@ class _HomeViewState extends State<HomeView> with WidgetsBindingObserver {
    );
    discoverySubscription = central.discovered.listen(
      (discovery) {
-        discoveries.value[discovery.address] = discovery;
+        discoveries.value[discovery.uuid] = discovery;
        discoveries.value = {...discoveries.value};
      },
    );
-    startDiscovery();
+    if (this.state.value) {
+      startDiscovery();
+    }
  }

  @override
@ -88,13 +99,13 @@ class _HomeViewState extends State<HomeView> with WidgetsBindingObserver {
  }

  void startDiscovery() async {
-    if (discovering.value || !await central.state) return;
+    if (discovering.value || !state.value) return;
    await central.startDiscovery();
    discovering.value = true;
  }

  void stopDiscovery() async {
-    if (!discovering.value || !await central.state) return;
+    if (!discovering.value || !state.value) return;
    await central.stopDiscovery();
    discoveries.value = {};
    discovering.value = false;
@ -113,7 +124,7 @@ class _HomeViewState extends State<HomeView> with WidgetsBindingObserver {
    stopDiscovery();
    await Navigator.of(context).pushNamed(
      'gatt',
-      arguments: discovery.address,
+      arguments: discovery.uuid,
    );
    startDiscovery();
  }
@ -121,16 +132,10 @@ class _HomeViewState extends State<HomeView> with WidgetsBindingObserver {

 extension on _HomeViewState {
  Widget get bodyView {
-    return FutureBuilder<bool>(
-      future: central.state,
-      builder: (context, snapshot) => snapshot.hasData
-          ? StreamBuilder<bool>(
-              stream: central.stateChanged,
-              initialData: snapshot.data,
-              builder: (context, snapshot) =>
-                  snapshot.data! ? discoveriesView : closedView,
-            )
-          : closedView,
+    return ValueListenableBuilder(
+      valueListenable: state,
+      builder: (context, bool state, child) =>
+          state ? discoveriesView : closedView,
    );
  }

@ -145,14 +150,14 @@ extension on _HomeViewState {
      onRefresh: () async => discoveries.value = {},
      child: ValueListenableBuilder(
        valueListenable: discoveries,
-        builder: (context, Map<MAC, Discovery> discoveries, child) {
+        builder: (context, Map<UUID, Discovery> discoveries, child) {
          return ListView.builder(
            padding: EdgeInsets.all(6.0),
            itemCount: discoveries.length,
            itemBuilder: (context, i) {
              final discovery = discoveries.values.elementAt(i);
              return Card(
-                color: Colors.amber,
+                color: discovery.connectable ? Colors.amber : Colors.grey,
                clipBehavior: Clip.antiAlias,
                shape: BeveledRectangleBorder(
                  borderRadius: BorderRadius.only(
@ -160,24 +165,39 @@ extension on _HomeViewState {
                      bottomLeft: Radius.circular(12.0)),
                ),
                margin: EdgeInsets.all(6.0),
-                key: Key(discovery.address.name),
+                key: Key(discovery.uuid.name),
                child: InkWell(
                  splashColor: Colors.purple,
-                  onTap: () => showGattView(discovery),
+                  onTap: discovery.connectable
+                      ? () => showGattView(discovery)
+                      : null,
                  onLongPress: () => showAdvertisements(discovery),
                  child: Container(
                    height: 100.0,
+                    padding: EdgeInsets.all(12.0),
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceAround,
                      children: [
-                        Column(
-                          mainAxisAlignment: MainAxisAlignment.center,
-                          children: [
-                            Text(discovery.name ?? 'NaN'),
-                            Text(discovery.address.name),
-                          ],
+                        Expanded(
+                          flex: 3,
+                          child: Column(
+                            mainAxisAlignment: MainAxisAlignment.center,
+                            children: [
+                              Text(discovery.name ?? 'NaN'),
+                              Text(
+                                discovery.uuid.name,
+                                softWrap: true,
+                              ),
+                            ],
+                          ),
+                        ),
+                        Expanded(
+                          flex: 1,
+                          child: Text(
+                            discovery.rssi.toString(),
+                            textAlign: TextAlign.center,
+                          ),
                        ),
-                        Text(discovery.rssi.toString()),
                      ],
                    ),
                  ),
@ -265,7 +285,7 @@ class _GattViewState extends State<GattView> {
  final ValueNotifier<Map<GattCharacteristic, StreamSubscription>> notifies;
  final ValueNotifier<List<String>> logs;

-  late MAC address;
+  late UUID uuid;

  _GattViewState()
      : state = ValueNotifier(ConnectionState.disconnected),
@ -282,10 +302,10 @@ class _GattViewState extends State<GattView> {

  @override
  Widget build(BuildContext context) {
-    address = ModalRoute.of(context)!.settings.arguments as MAC;
+    uuid = ModalRoute.of(context)!.settings.arguments as UUID;
    return Scaffold(
      appBar: AppBar(
-        title: Text('$address'),
+        title: Text(uuid.name),
        actions: [
          changeStateView,
        ],
@ -336,7 +356,7 @@ class _GattViewState extends State<GattView> {
  void connect() async {
    try {
      state.value = ConnectionState.connecting;
-      gatt = await central.connect(address);
+      gatt = await central.connect(uuid);
      state.value = ConnectionState.connected;
      connectionLostSubscription = gatt!.connectionLost.listen(
        (errorCode) async {
@ -547,6 +567,7 @@ extension on _GattViewState {
              final controllerView = TextField(
                controller: writeController,
                decoration: InputDecoration(
+                  hintText: 'MTU: ${gatt!.maximumWriteLength}',
                  suffixIcon: IconButton(
                    onPressed: canWrite
                        ? () {
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@ -5,7 +5,7 @@ packages:
    dependency: transitive
    description:
      name: async
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.6.1"
  bluetooth_low_energy:
@ -14,68 +14,68 @@ packages:
      path: ".."
      relative: true
    source: path
-    version: "0.0.2"
+    version: "0.1.0"
  boolean_selector:
    dependency: transitive
    description:
      name: boolean_selector
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.0"
  characters:
    dependency: transitive
    description:
      name: characters
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  charcode:
    dependency: transitive
    description:
      name: charcode
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  clock:
    dependency: transitive
    description:
      name: clock
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  collection:
    dependency: transitive
    description:
      name: collection
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.15.0"
  convert:
    dependency: "direct main"
    description:
      name: convert
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
  cupertino_icons:
    dependency: "direct main"
    description:
      name: cupertino_icons
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.3"
  fake_async:
    dependency: transitive
    description:
      name: fake_async
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  fixnum:
    dependency: transitive
    description:
      name: fixnum
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.0"
  flutter:
@ -87,7 +87,7 @@ packages:
    dependency: "direct main"
    description:
      name: flutter_simple_treeview
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.0.0-nullsafety.1"
  flutter_test:
@ -99,35 +99,35 @@ packages:
    dependency: transitive
    description:
      name: matcher
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.12.10"
  meta:
    dependency: transitive
    description:
      name: meta
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.3.0"
  path:
    dependency: transitive
    description:
      name: path
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.8.0"
  pedantic:
    dependency: "direct dev"
    description:
      name: pedantic
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
  protobuf:
    dependency: transitive
    description:
      name: protobuf
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.0.0"
  sky_engine:
@ -139,56 +139,56 @@ packages:
    dependency: transitive
    description:
      name: source_span
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.8.1"
  stack_trace:
    dependency: transitive
    description:
      name: stack_trace
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.10.0"
  stream_channel:
    dependency: transitive
    description:
      name: stream_channel
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.0"
  string_scanner:
    dependency: transitive
    description:
      name: string_scanner
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  term_glyph:
    dependency: transitive
    description:
      name: term_glyph
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  test_api:
    dependency: transitive
    description:
      name: test_api
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.3.0"
  typed_data:
    dependency: transitive
    description:
      name: typed_data
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.3.0"
  vector_math:
    dependency: transitive
    description:
      name: vector_math
-      url: "https://pub.flutter-io.cn"
+      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.0"
 sdks: