Flutter 谷歌签名问题

在Flatter应用程序中使用OAuth和google_sign_in:^4.5.5创建Gmail登录时出现此错误

[38;5;248mLaunching lib\main.dart on DUB LX1 in debug mode...[39;49m
 lib\main.dart
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:23: error: package com.google.android.gms.tasks does not exist
import com.google.android.gms.tasks.OnCompleteListener;
                                   ^
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:24: error: package com.google.android.gms.tasks does not exist
import com.google.android.gms.tasks.RuntimeExecutionException;
                                   ^
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:25: error: package com.google.android.gms.tasks does not exist
import com.google.android.gms.tasks.Task;
                                   ^
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:471: error: cannot find symbol
    private void onSignInResult(Task<GoogleSignInAccount> completedTask) {
                                ^
  symbol:   class Task
  location: class Delegate
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:363: error: cannot find symbol
      Task<GoogleSignInAccount> task = signInClient.silentSignIn();
      ^
  symbol:   class Task
  location: class Delegate
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:369: error: cannot find symbol
            new OnCompleteListener<GoogleSignInAccount>() {
                ^
  symbol:   class OnCompleteListener
  location: class Delegate
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:404: error: cannot find symbol
              new OnCompleteListener<Void>() {
                  ^
  symbol:   class OnCompleteListener
  location: class Delegate
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:424: error: cannot find symbol
              new OnCompleteListener<Void>() {
                  ^
  symbol:   class OnCompleteListener
  location: class Delegate
E:\flutter_windows_1.20.4-stable_1\flutter\.pub-cache\hosted\pub.dartlang.org\google_sign_in-4.5.5\android\src\main\java\io\flutter\plugins\googlesignin\GoogleSignInPlugin.java:479: error: cannot find symbol
      } catch (RuntimeExecutionException e) {
               ^
  symbol:   class RuntimeExecutionException
  location: class Delegate
9 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':google_sign_in:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output 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 https://help.gradle.org

BUILD FAILED in 52s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

[38；5；248M在调试模式下在DUB LX1上启动lib\main.dart…[39；49m
lib\main.dart
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:23：错误：包com.google.android.gms.tasks不存在
导入com.google.android.gms.tasks.OnCompleteListener；
^
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:24：错误：包com.google.android.gms.tasks不存在
导入com.google.android.gms.tasks.RuntimeExecutionException；
^
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:25：错误：包com.google.android.gms.tasks不存在
导入com.google.android.gms.tasks.Task；
^
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:471:错误：找不到符号
私有void onSignInResult（任务已完成任务）{
^
符号：课堂任务
地点：班级代表
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:363:错误：找不到符号
Task Task=signInClient.silentSignIn（）；
^
符号：课堂任务
地点：班级代表
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:369:错误：找不到符号
新的OnCompleteListener（）{
^
符号：类OnCompleteListener
地点：班级代表
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:404:错误：找不到符号
新的OnCompleteListener（）{
^
符号：类OnCompleteListener
地点：班级代表
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:424:错误：找不到符号
新的OnCompleteListener（）{
^
符号：类OnCompleteListener
地点：班级代表
E:\flatter\u windows\u 1.20.4-stable\u 1\flatter\.pub cache\hosted\pub.dartlang.org\google\u sign\u in-4.5.5\android\src\main\java\io\flatter\plugins\googlesignin\GoogleSignInPlugin.java:479:错误：找不到符号
}捕获（RuntimeExecutionE异常）{
^
符号：类RuntimeExecutionException
地点：班级代表
9个错误
失败：生成失败，出现异常。
*出了什么问题：
任务“：google\u登录：CompiledBugJavaWithJavaC”的执行失败。
>编译失败；有关详细信息，请参阅编译器错误输出。
*尝试：
使用--stacktrace选项运行以获取堆栈跟踪。使用--info或--debug选项运行以获取更多日志输出。使用--scan运行以获取完整的细节。
*得到更多的帮助https://help.gradle.org
构建在52秒内失败
异常：Gradle任务assembleDebug失败，退出代码为1
退出（sigterm）