I'm trying to Authenticate into Google Oauth with Android, I successfully authenticate, store my credentials and auth token but then there's one particular piece of code that I am falling over at; returning an instance of AuthorizationCodeInstalledApp. The problem seems to be that this API is made for Java desktop applications and is trying to load a browser instance. Here is my GoogleCredentialsUtilityModule, a slightly refactored version of the code that is shown in the Android developer docs:
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()
}
}
Here is my error message:
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
I can't seem to find any alternative to AuthorizationCodeInstalledApp. Any advice? Should I write my own Authentication code? Is there an Android version of AuthorizationCodeInstalledApp that I can use? I'm finding the documentation so vague and hard to read.
Developing on API 29 using a Google Pixel 3 XL.
I copied dnsiv's answer and overridden AuthorizationCodeInstalledApp and I now have the following code:
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")