如何解决Flutter:PlatformExceptionno_available_camera,没有可用于拍照的相机,null,null
伙计们!我正在面对这个相机版本。合并项目后发生了。它说没有可用的摄像头,但当时运行良好。请看看!
E/flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: PlatformException(no_available_camera,No cameras available for taking pictures.,null,null)
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:582:7)
#1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:159:18)
<asynchronous suspension>
#2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:332:12)
#3 MethodChannelImagePicker.pickImagePath (package:image_picker_platform_interface/src/method_channel/method_channel_image_picker.dart:62:21)
#4 MethodChannelImagePicker.pickImage (package:image_picker_platform_interface/src/method_channel/method_channel_image_picker.dart:30:25)
#5 ImagePicker.getImage (package:image_picker/image_picker.dart:101:21)
#6 _ImageEvaluationState.getImage (package:PhotoEarn/screens/camera/image_evaluation.dart:201:38)
#7 _ImageEvaluationState.build.<anonymous closure> (package:PhotoEarn/screens/camera/image_evaluation.dart:1099:33)
#8 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:993:19)
#9 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:1111:38)
#10 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:183:24)
#11 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:598:11)
#12 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:287:5)
#13 BaseTapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:259:7)
#14 GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:157:27)
#15 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:362:20)
#16 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:338:22)
#17 RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:267:11)
#18 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:295:7)
#19 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:240:7)
#20 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:213:7)
#21 _rootRunUnary (dart:async/zone.dart:1206:13)
#22 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#23 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
#24 _invoke1 (dart:ui/hooks.dart:265:10)
#25 _dispatchPointerDataPacket (dart:ui/hooks.dart:174:5)
请查看此错误消息并提供帮助。我希望听到大家的来信。预先谢谢你。
解决方法
鉴于目标是仅访问相机,我不确定添加 QUERY_ALL_PACKAGES
是正确的解决方案。如果 targetSdkVersion=30
(或更高),将 <queries>
添加到您的 AndroidManifest.xml
看起来是这里的首选解决方案 - https://stackoverflow.com/a/63246789/268156
<manifest package="com.example">
<queries>
<intent>
<action android:name="android.media.action.IMAGE_CAPTURE" />
</intent>
</queries>
...
</manifest>
,
如果您的compileSdkVersion和targetSdkVersion为30(或更高),则将以下内容添加到Android清单中:
<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>
那应该可以解决您的问题。
,在Github issue中,有两种方法可以解决此问题
- 使用
flutter upgrade
更新到最新的flutter版本,然后运行您的应用。如果这不起作用,请使用flutter channel master
切换到Flutter主频道并运行该应用。 - 如果上述方法不能解决问题,则应将
compileSdkVersion
和targetSdkVersion
都设置为29。
我面临同样的问题。对于android,您需要在AndroidManifest.xml 文件中添加Camera 权限和Query all packages 权限,如下所示:
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>
,
如果您的目标是 android 11/android sdk 30 或更高版本,则需要在 android manifest xml 文件中添加以下权限。
<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>
它可能会引发另一个警告,但您可以暂时忽略它。问候。
,我在 Emulator
上进行测试,当我切换到 Real device
时,一切正常。
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