Java AuthorizationCodeInstalledApp-Android替代方案

我正试图用Android验证GoogleOAuth，我成功地验证、存储了我的凭证和身份验证令牌，但有一段特殊的代码让我陷入困境；返回

AuthorizationCodeInstalledApp

的实例。问题似乎在于，该API是为Java桌面应用程序设计的，并且正在尝试加载浏览器实例。这是我的

googlecredentialsutilitypodule

，Android开发者文档中显示的代码的稍微重构版本：

import android.content.Context
import android.os.AsyncTask
import com.example.bluelightlite.constants.CREDENTIALS_FILE_PATH
import com.example.bluelightlite.constants.JSON_FACTORY
import com.example.bluelightlite.constants.SCOPES
import com.example.bluelightlite.constants.TOKENS_DIRECTORY_PATH
import com.google.api.client.auth.oauth2.Credential
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets
import com.google.api.client.http.javanet.NetHttpTransport
import com.google.api.client.util.store.FileDataStoreFactory
import java.io.File
import java.io.FileNotFoundException
import java.io.InputStream
import java.io.InputStreamReader


class GoogleCredentialsUtilityModule constructor(private val context: Context): AsyncTask<NetHttpTransport, Void, Credential>() {

    /**
     * Starts getting credentials on a different thread by implementing
     * AsyncTask<>()
     * @param params: a list of parameters
     * @return Google Credentials that come from this.getCredentials()
     */
    override fun doInBackground(vararg params: NetHttpTransport): Credential {
        return this.getCredentials(params[0])
    }

    /**
     * Creates an authorized Credential object.
     * @param HTTP_TRANSPORT The network HTTP Transport.
     * @return An authorized Credential object.
     * @throws java.io.IOException If the credentials.json file cannot be found.
     */
    private fun getCredentials(HTTP_TRANSPORT: NetHttpTransport): Credential {

        val inputStream: InputStream = getCredentialsAsInputStream()
        val clientSecrets: GoogleClientSecrets = GoogleClientSecrets.load(JSON_FACTORY, InputStreamReader(inputStream))

        createTokenFolderIfMissing()

        val authorisationFlow: GoogleAuthorizationCodeFlow = getAuthorisationFlow(HTTP_TRANSPORT, clientSecrets)
        val receiver: LocalServerReceiver = LocalServerReceiver.Builder()
            .setPort(8888)
            .build()

        return AuthorizationCodeInstalledApp(authorisationFlow, receiver).authorize("user") //falls over here
    }

    /**
     * Gets the /credentials.json file
     * @return InputStream
     */
    private fun getCredentialsAsInputStream(): InputStream {
        return this.javaClass.getResourceAsStream(CREDENTIALS_FILE_PATH)
            ?: throw FileNotFoundException("Resource Not found: $CREDENTIALS_FILE_PATH")
    }

    /**
     * Creates the Tokens Folder for Google Authentication
     * Uses the current context for the folder path from
     * Context.getExternalFilesDir()
     */
    private fun createTokenFolderIfMissing() {
        val tokenFolder = getTokenFolder()
        if (!tokenFolder.exists()) {
            tokenFolder.mkdir()
        }
    }

    /**
     * gets External storage directory from the
     * current context
     * @return File
     */
    private fun getTokenFolder(): File {
        return File(this.context.getExternalFilesDir("")?.absolutePath + TOKENS_DIRECTORY_PATH)
    }

    /**
     * Gets authorisation flow so that the application can authenticate into Google Calendars
     * @param HTTP_TRANSPORT allows the app to use HTTP connections
     * @param clientSecrets secrets for authentication into Google
     * @return GoogleAuthorizationCodeFlow
     */
    private fun getAuthorisationFlow(HTTP_TRANSPORT: NetHttpTransport, clientSecrets: GoogleClientSecrets): GoogleAuthorizationCodeFlow {
        return GoogleAuthorizationCodeFlow.Builder(
            HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
            .setDataStoreFactory(FileDataStoreFactory(getTokenFolder()))
            .setAccessType("offline")
            .build()
    }
}

导入android.content.Context
导入android.os.AsyncTask
导入com.example.bluelightlite.constants.CREDENTIALS\u文件\u路径
导入com.example.bluelightlite.constants.JSON_工厂
导入com.example.bluelightlite.constants.SCOPES
导入com.example.bluelightlite.constants.TOKENS\u目录\u路径
导入com.google.api.client.auth.oauth2.Credential
导入com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp
导入com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver
导入com.google.api.client.googleapis.auth.oauth2.googleaauthorizationcodeflow
导入com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets
导入com.google.api.client.http.javanet.NetHttpTransport
导入com.google.api.client.util.store.FileDataStoreFactory
导入java.io.xml文件
导入java.io.FileNotFoundException
导入java.io.InputStream
导入java.io.InputStreamReader
类GoogleCredentialsUtilityModule构造函数（私有val上下文：上下文）：AsyncTask（）{
/**
*开始通过实现在不同线程上获取凭据
*AsyncTask（）
*@param params：参数列表
*@返回来自此的Google凭据。getCredentials（）
*/
覆盖fun doInBackground（vararg参数：NetHttpTransport）：凭证{
返回此.getCredentials（参数[0]）
}
/**
*创建授权凭据对象。
*@param HTTP_传输网络HTTP传输。
*@返回授权凭证对象。
*如果找不到credentials.json文件，@将抛出java.io.IOException。
*/
私有凭据（HTTP_传输：NetHttpTransport）：凭据{
val inputStream:inputStream=getCredentialsAsInputStream（）
val clientSecrets:GoogleClientSecrets=GoogleClientSecrets.load（JSON_工厂，InputStreamReader（inputStream））
createTokenFolderInfmissing（）
val授权流：GoogleAuthorizationCodeFlow=GetAuthorizationFlow（HTTP_传输，客户端机密）
val receiver:LocalServerReceiver=LocalServerReceiver.Builder（）
.设置端口（8888）
.build（）
返回AuthorizationCodeInstalledApp（authorizationFlow，receiver）。authorization（“用户”）//在这里
}
/**
*获取/credentials.json文件
*@returninputstream
*/
private fun getCredentialsAsInputStream（）：InputStream{
返回此.javaClass.getResourceAsStream（凭证\u文件\u路径）
？：抛出FileNotFoundException（“未找到资源：$CREDENTIALS\u FILE\u PATH”）
}
/**
*为Google身份验证创建Tokens文件夹
*使用来自的文件夹路径的当前上下文
*Context.getExternalFilesDir（）
*/
私人娱乐CreateTokeFolderIfmissing（）{
val tokenFolder=getTokenFolder（）
如果（！tokenFolder.exists（））{
tokenFolder.mkdir（）
}
}
/**
*从中获取外部存储目录
*当前上下文
*@return文件
*/
private fun getTokenFolder（）：文件{
返回文件（this.context.getExternalFilesDir（“”？.absolutePath+TOKENS\u目录\u路径）
}
/**
*获取授权流，以便应用程序可以在Google日历中进行身份验证
*@param HTTP_TRANSPORT允许应用程序使用HTTP连接
*@param clientSecrets用于谷歌认证的机密
*@return GoogleAuthorizationCodeFlow
*/
private fun GetAuthorizationFlow（HTTP_TRANSPORT:NetHttpTransport，clientSecrets:GoogleClientSecrets）：GoogleAuthorizationCodeFlow{
返回GoogleAuthorizationCodeFlow.Builder(
HTTP_传输、JSON_工厂、客户端机密、作用域）
.setDataStoreFactory（FileDataStoreFactory（getTokenFolder（）））
.setAccessType（“脱机”）
.build（）
}
}

以下是我的错误消息：

02/21 20:04:33: Launching 'app' on Pixel 3 XL API 29.
$ adb shell am start -n "com.example.bluelightlite/com.example.bluelightlite.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 9795 on device 'Pixel_3_XL_API_29 [emulator-5554]'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
W/RenderThread: type=1400 audit(0.0:48): avc: denied { write } for name="property_service" dev="tmpfs" ino=6831 scontext=u:r:untrusted_app:s0:c133,c256,c512,c768 tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0 app=com.example.bluelightlite
W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission denied)
D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
W/System.err: 2020-02-21 20:04:39.683:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
    2020-02-21 20:04:39.684:INFO::jetty-0.0
W/System.err: 2020-02-21 20:04:39.805:INFO::Started SocketConnector@localhost:8888
I/System.out: Please open the following address in your browser:
      https://accounts.google.com/o/oauth2/auth?access_type=offline&client_id=475059597551-bugt3i0nnfe7unsoqt8ghu2ovm7dfrqg.apps.googleusercontent.com&redirect_uri=http://localhost:8888/Callback&response_type=code&scope=https://www.googleapis.com/auth/calendar.readonly
W/System.err: 2020-02-21 20:04:39.823:INFO::Stopped SocketConnector@localhost:8888
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.bluelightlite, PID: 9795
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.bluelightlite/com.example.bluelightlite.MainActivity}: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: Failed resolution of: Ljava/awt/Desktop;
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
     Caused by: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: Failed resolution of: Ljava/awt/Desktop;
        at java.util.concurrent.FutureTask.report(FutureTask.java:123)
        at java.util.concurrent.FutureTask.get(FutureTask.java:193)
        at android.os.AsyncTask.get(AsyncTask.java:602)
        at com.example.bluelightlite.models.GoogleCalenderCredentials.<init>(GoogleCalanderCredentials.kt:15)
        at com.example.bluelightlite.modules.GoogleCalendarsServiceModule.<init>(GoogleCalendarsServiceModule.kt:11)
        at com.example.bluelightlite.MainActivity.onCreate(MainActivity.kt:25)
        at android.app.Activity.performCreate(Activity.java:7802)
        at android.app.Activity.performCreate(Activity.java:7791)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016) 
        at android.os.Handler.dispatchMessage(Handler.java:107) 
        at android.os.Looper.loop(Looper.java:214) 
        at android.app.ActivityThread.main(ActivityThread.java:7356) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) 
     Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Ljava/awt/Desktop;
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.browse(AuthorizationCodeInstalledApp.java:129)
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.onAuthorization(AuthorizationCodeInstalledApp.java:113)
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.authorize(AuthorizationCodeInstalledApp.java:81)
        at com.example.bluelightlite.modules.GoogleCredentialsUtilityModule.getCredentials(GoogleCredentialsUtilityModule.kt:52)
        at com.example.bluelightlite.modules.GoogleCredentialsUtilityModule.doInBackground(GoogleCredentialsUtilityModule.kt:31)
        at com.example.bluelightlite.modules.GoogleCredentialsUtilityModule.doInBackground(GoogleCredentialsUtilityModule.kt:22)
        at android.os.AsyncTask$3.call(AsyncTask.java:378)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:289)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "java.awt.Desktop" on path: DexPathList[[zip file "/data/app/com.example.bluelightlite-6neG3BDx7D1LEKBl_6YMYg==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.bluelightlite-6neG3BDx7D1LEKBl_6YMYg==/lib/x86, /system/lib, /system/product/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.browse(AuthorizationCodeInstalledApp.java:129) 
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.onAuthorization(AuthorizationCodeInstalledApp.java:113) 
        at com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp.authorize(AuthorizationCodeInstalledApp.java:81) 
        at com.example.bluelightlite.modules.GoogleCredentialsUtilityModule.getCredentials(GoogleCredentialsUtilityModule.kt:52) 
        at com.example.bluelightlite.modules.GoogleCredentialsUtilityModule.doInBackground(GoogleCredentialsUtilityModule.kt:31) 
        at com.example.bluelightlite.modules.GoogleCredentialsUtilityModule.doInBackground(GoogleCredentialsUtilityModule.kt:22) 
        at android.os.AsyncTask$3.call(AsyncTask.java:378) 
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:289) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:919) 
I/Process: Sending signal. PID: 9795 SIG: 9

02/21 20:04:33：在Pixel 3 XL API 29上启动“应用程序”。
$adb shell am start-n“com.example.bluelightlite/com.example.bluelightlite.MainActivity”-一个android.intent.action.MAIN-c android.intent.category.LAUNCHER
已连接到设备“Pixel_3_XL_API_29[emulator-5554]”上的进程9795。
从应用程序捕获和显示logcat消息。可以在“调试器”设置页面的“Logcat输出”部分禁用此行为。
D/libEGL:Emulator具有主机GPU支持，qemu.gles设置为1。
W/RenderThread:type=1400 audit（0.0:48）：avc:denied{write}for name=“property\u service”dev=“tmpfs”ino=6831 scontext=u:r:untrusted\u app:s0:c133、c256、c512、c768 tcontext=u:object\r:property\u socket:s0 tclass=sock\u file permissive=0 app=com.example.bluelightlite
W/libc:无法将属性“qemu.gles”设置为“1”：连接失败；errno=13（权限被拒绝）
D/libEGL:load/vendor/lib/egl/libEGL_.so
D/libEGL:load/vendor/lib/egl/libGLESv1_CM_emulation.so
D/libEGL:load/vendor/lib/egl/libGLESv2_emulation.so
W/System.err:2020-02-21 20:04:39.683:INFO：：通过org.mortbay.log.StdErrLog登录到STDERR
2020-02-21 20:04:39.684：信息：：jetty-0.0
W/System.err:2020-02-21 20:04:39.805:INFO:：StartedSocketConnector@localhost:8888
I/System.out：请在浏览器中打开以下地址：
https://accounts.google.com/o/oauth2/auth?access_type=offline&client_id=475059597551-bugt3i0nnfe7unsoqt8ghu2ovm7dfrqg.apps.googleusercontent.com&重定向uri=http://localhost:8888/Callback&response_
private fun getCredentials(HTTP_TRANSPORT: NetHttpTransport): Credential {

        val inputStream: InputStream = getCredentialsAsInputStream()
        val clientSecrets: GoogleClientSecrets = GoogleClientSecrets.load(JSON_FACTORY, InputStreamReader(inputStream))

        createTokenFolderIfMissing()

        val authorisationFlow: GoogleAuthorizationCodeFlow = getAuthorisationFlow(HTTP_TRANSPORT, clientSecrets)

        val ab: AuthorizationCodeInstalledApp =
            object : AuthorizationCodeInstalledApp(authorisationFlow, LocalServerReceiver()) {
                @Throws(IOException::class)
                override fun onAuthorization(authorizationUrl: AuthorizationCodeRequestUrl) {
                    val url = authorizationUrl.build()
                    val browserIntent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
                    context.startActivity(browserIntent)
                }
            }

        return ab.authorize("user").setAccessToken("user")