flutter对接nfc,flutter 组件通信

flutter 反编译

You are building a fat APK that includes binaries for android-arm, android-arm64.

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If you are deploying the app to the Play Store, it's recommended to use app bundles or split the APK to reduce the APK size.

To generate an app bundle, run:

    flutter build appbundle --target-platform android-arm,android-arm64

    Learn more on:

To split the APKs per ABI, run:

    flutter build apk --target-platform android-arm,android-arm64 --split-per-abi

    Learn more on: 

Initializing gradle...                                              2.3s

Resolving dependencies...                                          14.2s

Running Gradle task 'assembleRelease'...                                                  ע: E:\work_tool\flutter\.pub-cache\hosted\pub.flutter-io.cn\connectivity-0.4.4\android\src\main\java\io\flutter\plugins\connectivity\ConnectivityPlugin.javaʹ�û????����ѹ�ʱ�� API��

ע: �й���ϸ��Ϣ, ��ʹ�� -Xlint:deprecation ���±��롣

ע: E:\work_tool\flutter\.pub-cache\hosted\pub.flutter-io.cn\url_launcher-5.1.3\android\src\main\java\io\flutter\plugins\urllauncher\WebViewActivity.javaʹ

�û????����ѹ�ʱ�� API��

ע: �й���ϸ��Ϣ, ��ʹ�� -Xlint:deprecation ���±��롣

Calling mockable JAR artifact transform to create file: C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\android.jar\baf414ed95f14e507d85c560886dfbe2\android.jar with input E:\work_tool\sdk\android-sdk-windows\platforms\android-28\android.jar

Calling mockable JAR artifact transform to create file: C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\android.jar\ab096bb3fb172ccb785acdb1058c10a9\android.jar with input E:\work_tool\sdk\android-sdk-windows\platforms\android-27\android.jar

Request to incrementing alive workforce from 0. Current workforce (dead or alive) 0

thread-pool size=4

ProGuard, version 6.0.3

Reading input...

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\flutter.jar\ab2691c929f4d2aa57a17fa551e662a6\jetified-flutter.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\app\intermediates\flutter\release\libs.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\localbroadcastmanager-1.0.0.aar\7a407f962902eada026a8e241a760bac\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\work-runtime-2.1.0.aar\8e3a1e8a8ff79006a94df6c01ceeb4f5\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\fragment-1.1.0.aar\4fa7d1b49e3514cb08c8a696f9b59436\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\room-runtime-2.1.0.aar\1b8774fa39759f08defb930275652eac\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\room-runtime-2.1.0.aar\1b8774fa39759f08defb930275652eac\jars\libs\room-common-java8-2.1.0.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\viewpager-1.0.0.aar\885186e7f6f969363bc93cd607d741a5\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\loader-1.0.0.aar\f84f22ad0a97d2c689850b912fc04277\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\activity-1.0.0.aar\a46db1490fae1b9001fc672a24eb288f\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\customview-1.0.0.aar\fe8bf4a709414e884086911d2168b715\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\core-1.1.0.aar\87febb54759dd5a2c7be8e971d745644\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\versionedparcelable-1.1.0.aar\754157c6f50ca4e4cf3ac8d7cb5ced26\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\androidx.collection\collection\1.1.0\1f27220b47669781457de0d600849a5de0e89909\collection-1.1.0.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-livedata-2.0.0.aar\de6944801d37d99b1dd0b877649fde1f\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-livedata-core-2.0.0.aar\e21d6663beb6faa41a30fd5a582cb4d9\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\core-runtime-2.0.1.aar\724bb0cc2ce99eaf0a23a99bb1cc5c23\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\androidx.room\room-common\2.1.0\b87765704590bd992ea0d92ac50253a9df7818a0\room-common-2.1.0.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\sqlite-framework-2.0.1.aar\9cbdf82e938f7e565620a3682d2406e9\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\sqlite-2.0.1.aar\1215aa5476f752bd431fb2d8059a1a39\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-service-2.0.0.aar\9d24ebd4d6766d7b2cd515369a737934\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-runtime-2.1.0.aar\ca02c0867547ae607130bcc54a4a9ba5\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-viewmodel-2.1.0.aar\594e1ff6298a01d8933530bb534fa472\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\savedstate-1.0.0.aar\8a2c3791a34fc80e5d9d268bf2886f95\jars\classes.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\androidx.lifecycle\lifecycle-common\2.1.0\c67e7807d9cd6c329b9d0218b2ec4e505dd340b7\lifecycle-common-2.1.0.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\androidx.arch.core\core-common\2.1.0\b3152fc64428c9354344bd89848ecddc09b6f07e\core-common-2.1.0.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\androidx.annotation\annotation\1.1.0\e3a6fb2f40e3a3842e6b7472628ba4ce416ea4c8\annotation-1.1.0.jar] (filtered)

Reading program jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\com.google.guava\listenablefuture\1.0\c949a840a6acbc5268d088e47b04177bf90b3cad\listenablefuture-1.0.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\flutter_downloader\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\shared_preferences\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\url_launcher\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\sqflite\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\connectivity\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\path_provider\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\package_info\intermediates\intermediate-jars\release\classes.jar] (filtered)

Reading program directory [F:\dartSpace\flutter\jiddspace\nfc\build\app\intermediates\javac\release\compileReleaseJavaWithJavac\classes] (filtered)

Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\app\intermediates\transforms\mergeJavaRes\release\0.jar] (filtered)

Reading library jar [C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\androidx.annotation\annotation\1.0.0\45599f2cd5965ac05a1488fa2a5c0cdd7c499ead\annotation-1.0.0.jar] (filtered)

Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\android.jar]

Reading library jar [E:\work_tool\sdk\android-sdk-windows\build-tools\28.0.3\core-lambda-stubs.jar]

Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\org.apache.http.legacy.jar]

Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\android.test.mock.jar]

Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\android.test.base.jar]

Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\android.test.runner.jar]

Initializing...

Warning: io.flutter.embedding.android.FlutterView: can't find referenced method 'android.graphics.Insets getSystemGestureInsets()' in library class android.view.WindowInsets

Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.view.FlutterView: can't find referenced method 'android.graphics.Insets getSystemGestureInsets()' in library class android.view.WindowInsets

Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets

Note: io.flutter.view.AccessibilityViewEmbedder$ReflectionAccessors: can't find dynamically referenced class android.util.LongArray

Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets

Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets

Note: there were 1 unresolved dynamic references to classes or interfaces.

  You should check if you need to specify additional program jars.

  ()

Warning: Exception while processing task java.io.IOException: Please correct the above warnings first.

Thread(Tasks limiter_1): destruction

Warning: there were 12 unresolved references to classes or interfaces.

    You may need to add missing library jars or update their versions.

    If your code works fine without the missing classes, you can suppress

    the warnings with '-dontwarn' options.

    ()

Warning: there were 2 unresolved references to library class members.

    You probably need to update the library versions.

    ()

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.

Job failed, see logs for details

* Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at

BUILD FAILED in 4m 23s

Running Gradle task 'assembleRelease'...

Running Gradle task 'assembleRelease'... Done                    264.4s (!)

*******************************************************************************************

The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.

See for more information on the problem and how to fix it.

*******************************************************************************************

Gradle task assembleRelease failed with exit code 1

web前端未来将会有什么样的发展趋势？

趋势一：更加移动优先

响应式设计显然是目前Web前端开发领域的主要趋势之一，并且这一趋势在未来还将持续一段时间。虽然现在的响应式设计大部分还是以PC版优先，然而如果有一天我们把PC版放到比移动版次要的位置上，也没有什么好奇怪的。因为，目前许多Web前端开发者已经开始转向以移动优先方案来做他们的响应式设计和开发，这就象征着一个重大转变，值得我们跟进的。

趋势二：更多使用快速原型开发工具

众多Web前端开发者从2016年开始尝试使用快速原型开发工具，而在2018年将是这种技术真正爆发的一年。“UXpin、Webflow、Invision以及其它许多快速原型开发工具，让设计师不用写一行代码，就能为网站和服务快速创建低保真和高保真原型，便于设计师衡量它们的可用性和美观性。” Web设计师Jamie Leeson says如是说，“许多工具也允许你在浏览器中设计原型并从工具里真正启动网站自身。”

不管未来前端发展方向如何，可以肯定的是未来前端人才需求依旧很大。想学前端开发专业的机构也很多，你可以去线下试听课程了解一下，例如北大青鸟、南京中博软件学院、南京课工场等等都有试听课程的！

跪求《白雪歌送武判官归京》的英文赏析

The north wind rolls the white grasses and breaks them;

And the Eighth-month snow across the Tartar sky

Is like a spring gale, come up in the night,

Blowing open the petals of ten thousand peartrees.

It enters the pearl blinds, it wets the silk curtains;

A fur coat feels cold, a cotton mat flimsy;

Bows become rigid, can hardly be drawn

And the metal of armour congeals on the men;

The sand-sea deepens with fathomless ice,

And darkness masses its endless clouds;

But we drink to our guest bound home from camp,

And play him barbarian lutes, guitars, harps;

Till at dusk, when the drifts are crushing our tents

And our frozen red flags cannot flutter in the wind,

We watch him through Wheel-Tower Gate going eastward.

Into the snow-mounds of Heaven-Peak Road....

And then he disappears at the turn of the pass,

Leaving behind him only hoof-prints.

当前题目：flutter对接nfc,flutter 组件通信
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