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android-studio - 在颤振中使用 image_picker 时遇到错误

问题描述

Hy，我是 Flutter 的新手，在使用一个使用 image_picker 从图库中获取图像的应用程序时，我遇到了这个错误。

C:\Users\Hrishabh Mishra\Desktop\FDR\Flutter\course\08\mycameraapp>flutter run
Launching lib\main.dart on Redmi Note 5 Pro in debug mode...
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:15: error: package android.support.annotation does not exist
import android.support.annotation.VisibleForTesting;
                                 ^
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:16: error: cannot find symbol
import android.support.v4.app.ActivityCompat;
                             ^
  symbol:   class ActivityCompat
  location: package android.support.v4.app
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:17: error: package android.support.v4.content does not exist
import android.support.v4.content.FileProvider;
                                 ^
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerFileProvider.java:3: error: package android.support.v4.content does not exist
import android.support.v4.content.FileProvider;
                                 ^
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerFileProvider.java:10: error: cannot find symbol
public class ImagePickerFileProvider extends FileProvider {}
                                             ^
  symbol: class FileProvider
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerPlugin.java:8: error: package android.support.annotation does not exist
import android.support.annotation.VisibleForTesting;
                                 ^
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:68: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_CODE_CHOOSE_IMAGE_FROM_GALLERY = 2342;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:69: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_CODE_TAKE_IMAGE_WITH_CAMERA = 2343;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:70: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_EXTERNAL_IMAGE_STORAGE_PERMISSION = 2344;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:71: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_CAMERA_IMAGE_PERMISSION = 2345;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:72: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_CODE_CHOOSE_VIDEO_FROM_GALLERY = 2352;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:73: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_CODE_TAKE_VIDEO_WITH_CAMERA = 2353;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:74: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_EXTERNAL_VIDEO_STORAGE_PERMISSION = 2354;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:75: error: cannot find symbol
  @VisibleForTesting static final int REQUEST_CAMERA_VIDEO_PERMISSION = 2355;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:77: error: cannot find symbol
  @VisibleForTesting final String fileProviderName;
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:164: error: cannot find symbol
  @VisibleForTesting
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerDelegate
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerPlugin.java:40: error: cannot find symbol
  @VisibleForTesting
   ^
  symbol:   class VisibleForTesting
  location: class ImagePickerPlugin
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:122: error: cannot find symbol
            return ActivityCompat.checkSelfPermission(activity, permissionName)
                   ^
  symbol: variable ActivityCompat
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:128: error: cannot find symbol
            ActivityCompat.requestPermissions(activity, new String[] {permissionName}, requestCode);
            ^
  symbol: variable ActivityCompat
H:\flutter\.pub-cache\hosted\pub.dartlang.org\image_picker-0.4.12+1\android\src\main\java\io\flutter\plugins\imagepicker\ImagePickerDelegate.java:140: error: cannot find symbol
            return FileProvider.getUriForFile(activity, fileProviderName, file);
                   ^
  symbol: variable FileProvider
20 errors

FAILURE: Build failed with an exception.

Execution failed for task ':image_picker:compileDebugJavaWithJavac'.  
Compilation failed; see the compiler error output for details.

BUILD FAILED in 28s
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done                        32.5s
The built failed likely due to AndroidX incompatibilities in a plugin. The tool is about to try using Jetfier to solve the incompatibility.
Building plugin image_picker...
Running Gradle task 'assembleAarRelease'...
Running Gradle task 'assembleAarRelease'... Done                   22.3s
WARNING: The option setting 'android.enableR8=true' is experimental and unsupported.
The current default is 'false'
Consider disabling R8 by removing 'android.enableR8=true' from your gradle.properties before publishing your app.


FAILURE: Build failed with an exception.

A problem occurred configuring root project 'imagepicker'.   
SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable.

16 秒内构建失败

由于上述问题，无法构建插件 image_picker。

标签： android-studioflutterandroidx

解决方案

SDK location not found. Define location with sdk.dir in the local.properties file or 
with an ANDROID_HOME environment variable.

首先配置 Android SDK。

方法一：

  1. 前往设置
  2. 扩展语言和框架
  3. 选择颤振
  4. 在Flutter SDK Path文本框中输入 flutter sdk 路径
  5. 点击确定

方法二：

Flutter 提供了更新 Android SDK 路径的命令：

Use flutter config --android-sdk <path-to-your-android-sdk-path>

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