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a/2022/04/27/flutter/dialog/popupmenubutton/index.html +++ b/2022/04/27/flutter/dialog/popupmenubutton/index.html @@ -159,7 +159,7 @@ diff --git a/2022/04/27/flutter/dialog/snackbar/index.html b/2022/04/27/flutter/dialog/snackbar/index.html index 1b27e2d..e0a9f39 100644 --- a/2022/04/27/flutter/dialog/snackbar/index.html +++ b/2022/04/27/flutter/dialog/snackbar/index.html @@ -159,7 +159,7 @@ diff --git a/2022/04/27/flutter/tabbar/tabbar_01/index.html b/2022/04/27/flutter/tabbar/tabbar_01/index.html index 136aadf..150c138 100644 --- a/2022/04/27/flutter/tabbar/tabbar_01/index.html +++ b/2022/04/27/flutter/tabbar/tabbar_01/index.html @@ -158,7 +158,7 @@ diff --git a/2022/04/28/flutter/code-snippets/index.html b/2022/04/28/flutter/code-snippets/index.html index 283b0b9..5ebf546 100644 --- a/2022/04/28/flutter/code-snippets/index.html +++ b/2022/04/28/flutter/code-snippets/index.html @@ -159,7 +159,7 @@ diff --git a/2022/04/28/flutter/form/form_01/index.html b/2022/04/28/flutter/form/form_01/index.html index f29bd96..d8d6fa6 100644 --- a/2022/04/28/flutter/form/form_01/index.html +++ b/2022/04/28/flutter/form/form_01/index.html @@ -158,7 +158,7 @@ diff --git a/2022/04/30/flutter/login/login17/index.html b/2022/04/30/flutter/login/login17/index.html index 8abb8e9..2a93960 100644 --- a/2022/04/30/flutter/login/login17/index.html +++ b/2022/04/30/flutter/login/login17/index.html @@ -159,7 +159,7 @@ diff --git a/2022/05/04/flutter/app/app-icon/index.html b/2022/05/04/flutter/app/app-icon/index.html index 9cf4ea0..ba023f5 100644 --- a/2022/05/04/flutter/app/app-icon/index.html +++ b/2022/05/04/flutter/app/app-icon/index.html @@ -161,7 +161,7 @@ diff --git a/2022/05/04/flutter/app/app-screen/index.html b/2022/05/04/flutter/app/app-screen/index.html index f0ec2ad..3d8d6d3 100644 --- a/2022/05/04/flutter/app/app-screen/index.html +++ b/2022/05/04/flutter/app/app-screen/index.html @@ -159,7 +159,7 @@ diff --git a/2022/05/09/dart/dart-stream/index.html b/2022/05/09/dart/dart-stream/index.html index 01847e9..a7b3923 100644 --- a/2022/05/09/dart/dart-stream/index.html +++ b/2022/05/09/dart/dart-stream/index.html @@ -169,7 +169,7 @@ diff --git a/2022/05/09/dart/dart-sync-async/index.html b/2022/05/09/dart/dart-sync-async/index.html index de8ed0e..efdf043 100644 --- a/2022/05/09/dart/dart-sync-async/index.html +++ b/2022/05/09/dart/dart-sync-async/index.html @@ -165,7 +165,7 @@ diff --git a/2022/05/10/bloc/bloc-starter/index.html b/2022/05/10/bloc/bloc-starter/index.html index b874b65..26fca22 100644 --- a/2022/05/10/bloc/bloc-starter/index.html +++ b/2022/05/10/bloc/bloc-starter/index.html @@ -164,7 +164,7 @@ diff --git a/2022/05/11/dev/macos/pod-install/index.html b/2022/05/11/dev/macos/pod-install/index.html index edf7227..24365c1 100644 --- a/2022/05/11/dev/macos/pod-install/index.html +++ b/2022/05/11/dev/macos/pod-install/index.html @@ -159,7 +159,7 @@ diff --git a/2022/05/12/dev/android/vider-play-error/index.html b/2022/05/12/dev/android/vider-play-error/index.html index 1c41d50..5a79918 100644 --- a/2022/05/12/dev/android/vider-play-error/index.html +++ b/2022/05/12/dev/android/vider-play-error/index.html @@ -31,9 +31,10 @@ - + + @@ -159,7 +160,7 @@ @@ -240,7 +241,7 @@

发表于 - + @@ -279,6 +280,7 @@

diff --git a/2022/05/12/dev/flutter-null-ware-error/index.html b/2022/05/12/dev/flutter-null-ware-error/index.html new file mode 100644 index 0000000..28abcac --- /dev/null +++ b/2022/05/12/dev/flutter-null-ware-error/index.html @@ -0,0 +1,345 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +解决 flutter 警告 Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null | CRUD + + + + + + + + + + +
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CRUD

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Inside developer

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+ 解决 flutter 警告 Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null +

+ +
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+ + + + + 发表于 + + + + + + + + + 分类于 + + + + + + +
+ +
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+ + + + +
+ 
1
Flutter: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null
+ +

解决方法：

+
pubspec.yaml
1
2
dependencies:
  flutter_typeahead: ^3.2.4
+ +
1
2
flutter clean
flutter pub get
+ +
+ + + + + + +
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+ +
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+ + +
+ © + 2022 + + + + haight +
+ +
+
+ + + + + + + + + + + + + + + + + + + + + + + diff --git a/archives/2022/03/index.html b/archives/2022/03/index.html index c03a581..4a2eb27 100644 --- a/archives/2022/03/index.html +++ b/archives/2022/03/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/04/index.html b/archives/2022/04/index.html index aba46f5..b7863a3 100644 --- a/archives/2022/04/index.html +++ b/archives/2022/04/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/04/page/2/index.html b/archives/2022/04/page/2/index.html index c280687..13bd8ac 100644 --- a/archives/2022/04/page/2/index.html +++ b/archives/2022/04/page/2/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/04/page/3/index.html b/archives/2022/04/page/3/index.html index 30a452c..0131a5e 100644 --- a/archives/2022/04/page/3/index.html +++ b/archives/2022/04/page/3/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/04/page/4/index.html b/archives/2022/04/page/4/index.html index 52eb9d7..3e5afab 100644 --- a/archives/2022/04/page/4/index.html +++ b/archives/2022/04/page/4/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/04/page/5/index.html b/archives/2022/04/page/5/index.html index 70ecd34..f4f3765 100644 --- a/archives/2022/04/page/5/index.html +++ b/archives/2022/04/page/5/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/04/page/6/index.html b/archives/2022/04/page/6/index.html index c02d324..07ebdd7 100644 --- a/archives/2022/04/page/6/index.html +++ b/archives/2022/04/page/6/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
diff --git a/archives/2022/05/index.html b/archives/2022/05/index.html index d7a7f8f..bcb632d 100644 --- a/archives/2022/05/index.html +++ b/archives/2022/05/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
diff --git a/archives/2022/index.html b/archives/2022/index.html index 955dcd3..0d0a769 100644 --- a/archives/2022/index.html +++ b/archives/2022/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/2022/page/2/index.html b/archives/2022/page/2/index.html index 1453d95..1b89530 100644 --- a/archives/2022/page/2/index.html +++ b/archives/2022/page/2/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/2022/page/3/index.html b/archives/2022/page/3/index.html index 4efbcdc..f877e34 100644 --- a/archives/2022/page/3/index.html +++ b/archives/2022/page/3/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/2022/page/4/index.html b/archives/2022/page/4/index.html index 135130a..fb0967e 100644 --- a/archives/2022/page/4/index.html +++ b/archives/2022/page/4/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/2022/page/5/index.html b/archives/2022/page/5/index.html index 445859f..30e0e12 100644 --- a/archives/2022/page/5/index.html +++ b/archives/2022/page/5/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/2022/page/6/index.html b/archives/2022/page/6/index.html index d2ff9bb..8cf0840 100644 --- a/archives/2022/page/6/index.html +++ b/archives/2022/page/6/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/2022/page/7/index.html b/archives/2022/page/7/index.html index 9eeeb9b..4a14d46 100644 --- a/archives/2022/page/7/index.html +++ b/archives/2022/page/7/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
diff --git a/archives/index.html b/archives/index.html index bf80d6c..06f0dd3 100644 --- a/archives/index.html +++ b/archives/index.html @@ -155,7 +155,7 @@

CRUD

- 42 + 43 标签
@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/page/2/index.html b/archives/page/2/index.html index 75dc92e..0e37995 100644 --- a/archives/page/2/index.html +++ b/archives/page/2/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/page/3/index.html b/archives/page/3/index.html index 3a03253..71b89d4 100644 --- a/archives/page/3/index.html +++ b/archives/page/3/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/page/4/index.html b/archives/page/4/index.html index d0b9d4a..a4519de 100644 --- a/archives/page/4/index.html +++ b/archives/page/4/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/page/5/index.html b/archives/page/5/index.html index bba52f2..c163b75 100644 --- a/archives/page/5/index.html +++ b/archives/page/5/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/page/6/index.html b/archives/page/6/index.html index 44b88fa..9ac2f9d 100644 --- a/archives/page/6/index.html +++ b/archives/page/6/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
@@ -393,26 +413,6 @@

CRUD

- - diff --git a/archives/page/7/index.html b/archives/page/7/index.html index 5109f2f..d79037a 100644 --- a/archives/page/7/index.html +++ b/archives/page/7/index.html @@ -155,7 +155,7 @@

CRUD

@@ -205,7 +205,7 @@

CRUD

- 不错! 目前共计 62 篇日志。 继续努力。 + 不错! 目前共计 63 篇日志。 继续努力。
@@ -213,6 +213,26 @@

CRUD

2022
+ +
diff --git a/categories/JavaScript/index.html b/categories/JavaScript/index.html index 5d37372..46c05cd 100644 --- a/categories/JavaScript/index.html +++ b/categories/JavaScript/index.html @@ -155,7 +155,7 @@
- 42 + 43 标签
diff --git a/categories/dart/index.html b/categories/dart/index.html index 1c8d304..d90c28d 100644 --- a/categories/dart/index.html +++ b/categories/dart/index.html @@ -155,7 +155,7 @@ diff --git a/categories/dev/index.html b/categories/dev/index.html index 9cc35e3..50b06bc 100644 --- a/categories/dev/index.html +++ b/categories/dev/index.html @@ -155,7 +155,7 @@ @@ -214,6 +214,26 @@

dev 2022 + +
diff --git a/categories/flutter/index.html b/categories/flutter/index.html index ce2a0f2..da39145 100644 --- a/categories/flutter/index.html +++ b/categories/flutter/index.html @@ -155,7 +155,7 @@
- 42 + 43 标签
diff --git a/categories/flutter/page/2/index.html b/categories/flutter/page/2/index.html index aefd8ce..454694c 100644 --- a/categories/flutter/page/2/index.html +++ b/categories/flutter/page/2/index.html @@ -155,7 +155,7 @@ diff --git a/categories/flutter/page/3/index.html b/categories/flutter/page/3/index.html index b63237c..45aa40d 100644 --- a/categories/flutter/page/3/index.html +++ b/categories/flutter/page/3/index.html @@ -155,7 +155,7 @@ diff --git a/categories/flutter/page/4/index.html b/categories/flutter/page/4/index.html index f671e48..b2e66eb 100644 --- a/categories/flutter/page/4/index.html +++ b/categories/flutter/page/4/index.html @@ -155,7 +155,7 @@ diff --git a/categories/index.html b/categories/index.html index 7beb0ef..09b0fa9 100644 --- a/categories/index.html +++ b/categories/index.html @@ -158,7 +158,7 @@ @@ -221,7 +221,7 @@

文章分离 目前共计 7 个分类
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diff --git a/categories/java/index.html b/categories/java/index.html index 0eef644..7a1ab0f 100644 --- a/categories/java/index.html +++ b/categories/java/index.html @@ -155,7 +155,7 @@ diff --git a/categories/java/page/2/index.html b/categories/java/page/2/index.html index 529fa59..8de7b99 100644 --- a/categories/java/page/2/index.html +++ b/categories/java/page/2/index.html @@ -155,7 +155,7 @@ diff --git a/categories/java/page/3/index.html b/categories/java/page/3/index.html index 0573846..0c457ca 100644 --- a/categories/java/page/3/index.html +++ b/categories/java/page/3/index.html @@ -155,7 +155,7 @@ diff --git a/categories/markdown/index.html b/categories/markdown/index.html index af9c7f8..11fd5ab 100644 --- a/categories/markdown/index.html +++ b/categories/markdown/index.html @@ -155,7 +155,7 @@ diff --git a/categories/utils/index.html b/categories/utils/index.html index 0bee939..38e36dc 100644 --- a/categories/utils/index.html +++ b/categories/utils/index.html @@ -155,7 +155,7 @@ diff --git a/index.html b/index.html index 977fb0b..13e2ddd 100644 --- a/index.html +++ b/index.html @@ -155,7 +155,7 @@

CRUD

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CRUD

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发表于 - + @@ -257,13 +257,12 @@

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Flutter 使用 video_player 播放视频，android模拟器上播放没有问题，真机出现播放画面黑屏问题。

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检查debug信息，发现出现一条错误提示：

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PlatformException(VideoError, Video player had error com.google.android.exoplayer2.ExoPlaybackException: Source error, null, null)
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Flutter: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null
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问题原因
安卓上从9.0(API level28)开始，明文通信支持默认是被禁用的，官方说法是不安全。因为我们播放的视频源是http协议，所以无法播放。

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解决方法
修改AndroidManifest.xml

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<manifest ...>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        android:usesCleartextTraffic="true"
        ...>
        ...
    </application>
</manifest>
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解决方法：

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pubspec.yaml
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dependencies:
  flutter_typeahead: ^3.2.4
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flutter clean
flutter pub get
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