Added service disabled message

app/src/main/java/eu/faircode/email/FragmentGmail.java

@@ -24,6 +24,7 @@ import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.accounts.AccountManagerCallback;
 import android.accounts.AccountManagerFuture;
+import android.accounts.AuthenticatorException;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
@@ -251,6 +252,8 @@ public class FragmentGmail extends FragmentBase {
         String name = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
         String type = data.getStringExtra(AccountManager.KEY_ACCOUNT_TYPE);
 
+        final String disabled = getString(R.string.title_setup_advanced_protection);
+
         boolean found = false;
         AccountManager am = AccountManager.get(getContext());
         Account[] accounts = am.getAccountsByType(type);
@@ -275,7 +278,12 @@ public class FragmentGmail extends FragmentBase {
 
                                     onAuthorized(name, token);
                                 } catch (Throwable ex) {
+                                    if (ex instanceof AuthenticatorException &&
+                                            "ServiceDisabled".equals(ex.getMessage()))
+                                        ex = new IllegalArgumentException(disabled, ex);
+
                                     Log.e(ex);
+
                                     tvError.setText(Log.formatThrowable(ex));
                                     grpError.setVisibility(View.VISIBLE);
 

app/src/main/res/values/strings.xml

@@ -179,6 +179,7 @@
     <string name="title_setup_no_auth_hint">Please double check your email address and password and make sure external access (IMAP/SMTP) is enabled for your account</string>
     <string name="title_setup_app_password_hint">This provider requires an app password instead of the account password, please check the instructions of your provider</string>
     <string name="title_setup_no_system_folders">Inbox or draft folder not found</string>
+    <string name="title_setup_advanced_protection">When enrolled in the advanced protection program it is not possible to use a third party email app. This is a restriction imposed by Google.</string>
     <string name="title_setup_quick_success">An account and an identity have successfully been added</string>
     <string name="title_setup_quick_failed">You can try to configure an account and an identity below too</string>
     <string name="title_setup_manage">Manage</string>