Tried new place for auth code, doesn't sign in

Author: Nicholas Harrison

app/build.gradle

@@ -174,8 +174,9 @@ dependencies {
     // implementation 'com.google.oauth-client:google-oauth-client-jetty:1.23.0'
     // implementation 'com.google.apis:google-api-services-drive:v3-rev110-1.23.0'
 
+    // implementation 'com.google.android.gms:play-services:17.0.0'
+    implementation 'com.google.android.gms:play-services-drive:17.0.0'
     implementation 'com.google.android.gms:play-services-auth:19.0.0'
-    // implementation 'com.google.android.gms:play-services-drive:17.0.0'
     implementation 'com.google.http-client:google-http-client-gson:1.26.0'
     implementation('com.google.api-client:google-api-client-android:1.26.0') {
         exclude group: 'org.apache.httpcomponents'

app/src/main/java/com/orgzly/android/repos/GoogleDriveClient.java

@@ -6,6 +6,7 @@
 import android.net.Uri;
 
 import com.google.android.gms.auth.api.signin.GoogleSignIn;
+import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
 
 import com.google.api.client.extensions.android.http.AndroidHttp;
 import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential;
@@ -48,8 +49,15 @@ public class GoogleDriveClient {
 
     private final Context mContext;
     private final long repoId;
+
+    private GoogleSignInAccount mGoogleAccount;
     private Drive mDriveService;
 
+    // Make static? Or maybe need to serialize or manage token.
+    // SharedPreferences or SQLite
+    // https://stackoverflow.com/questions/19274063/object-becomes-null
+    // Thought that Google sign-in would handle it, but it's not working or not building.
+
     private Map<String, String> pathIds;
     {
         pathIds = new HashMap<>();
@@ -63,14 +71,8 @@ public GoogleDriveClient(Context context, long id) {
         repoId = id;
     }
 
-    public void setService(Drive driveService) {
-        mDriveService = driveService;
-    }
-
     public boolean isLinked() {
-        // Check for existing Google Sign In account, if the user is already signed in
-        // the GoogleSignInAccount will be non-null.
-        return GoogleSignIn.getLastSignedInAccount(mContext) != null;
+        return setService();
     }
 
     private void linkedOrThrow() throws IOException {
@@ -79,6 +81,26 @@ private void linkedOrThrow() throws IOException {
         }
     }
 
+    public boolean setService() {
+        // Check for existing Google Sign In account, if the user is already signed in
+        // the GoogleSignInAccount will be non-null.
+        if (mDriveService == null) {
+            mGoogleAccount = GoogleSignIn.getLastSignedInAccount(mContext);
+            if (mGoogleAccount != null) {
+                // Use the authenticated account to sign in to the Drive service.
+                GoogleAccountCredential credential = GoogleAccountCredential.usingOAuth2(mContext, Collections.singleton(DriveScopes.DRIVE));
+                credential.setSelectedAccount(mGoogleAccount.getAccount());
+                mDriveService = Drive.Builder(AndroidHttp.newCompatibleTransport(),
+                mDriveService = new Drive.Builder(AndroidHttp.newCompatibleTransport(),
+                                              new GsonFactory(),
+                                              credential)
+                    .setApplicationName("Orgzly")
+                    .build();
+            }
+        }
+        return mDriveService != null;
+    }
+
     private String findId(String path) throws IOException {
         if (pathIds.containsKey(path)) {
             return pathIds.get(path);

app/src/main/java/com/orgzly/android/ui/repo/googledrive/GoogleDriveRepoActivity.kt

@@ -160,19 +160,9 @@ class GoogleDriveRepoActivity : CommonActivity() {
             GoogleSignIn.getSignedInAccountFromIntent(result)
                 .addOnSuccessListener({ googleAccount->
                                             Log.d(TAG, "Signed in as " + googleAccount.getEmail())
-                                        // Use the authenticated account to sign in to the Drive service.
-                                        val credential = GoogleAccountCredential.usingOAuth2(
-                                            this, Collections.singleton(DriveScopes.DRIVE))
-                                        credential.setSelectedAccount(googleAccount.getAccount())
-                                        val googleDriveService = Drive.Builder(
-                                            AndroidHttp.newCompatibleTransport(),
-                                            GsonFactory(),
-                                            credential)
-                                            .setApplicationName("Orgzly")
-                                            .build()
                                         // The DriveServiceHelper encapsulates all REST API and SAF functionality.
                                         // Its instantiation is required before handling any onClick actions.
-                                        client.setService(googleDriveService);
+                                        client.setService();
                                         showSnackbar(R.string.message_google_drive_linked)
                 })
                 .addOnFailureListener({ exception-> Log.d(TAG, "Unable to sign in." + exception) })