Some tasks should not be interrupted

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

@@ -725,7 +725,7 @@ public class ActivitySetup extends ActivityBase implements FragmentManager.OnBac
                                 ex instanceof SecurityException);
                 Log.unexpectedError(getSupportFragmentManager(), ex, !expected);
             }
-        }.execute(this, args, "setup:export");
+        }.setInterruptable(false).execute(this, args, "setup:export");
     }
 
     private void handleImport(Intent data, String password) {
@@ -1115,7 +1115,7 @@ public class ActivitySetup extends ActivityBase implements FragmentManager.OnBac
                     Log.unexpectedError(getSupportFragmentManager(), ex, !expected);
                 }
             }
-        }.execute(this, args, "setup:import");
+        }.setInterruptable(false).execute(this, args, "setup:import");
     }
 
     private void handleImportCertificate(Intent data) {

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

@@ -1005,7 +1005,7 @@ public class FragmentFolders extends FragmentBase {
             }
 
 
-        }.execute(this, args, "folder:export");
+        }.setInterruptable(false).execute(this, args, "folder:export");
     }
 
     public static class FragmentDialogApply extends FragmentDialogBase {

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

@@ -51,6 +51,7 @@ import java.util.concurrent.Future;
 public abstract class SimpleTask<T> implements LifecycleObserver {
     private boolean log = true;
     private boolean count = true;
+    private boolean interruptable = true;
 
     private String name;
     private long started;
@@ -82,6 +83,11 @@ public abstract class SimpleTask<T> implements LifecycleObserver {
         return this;
     }
 
+    public SimpleTask<T> setInterruptable(boolean interruptable) {
+        this.interruptable = interruptable;
+        return this;
+    }
+
     public SimpleTask<T> setExecutor(ExecutorService executor) {
         this.localExecutor = executor;
         return this;
@@ -284,7 +290,8 @@ public abstract class SimpleTask<T> implements LifecycleObserver {
                     long elapsed = now - task.started;
                     if (elapsed > CANCEL_AFTER && !task.interrupted) {
                         task.interrupted = true;
-                        if (task.future != null && !task.future.isDone()) {
+                        if (task.interruptable &&
+                                task.future != null && !task.future.isDone()) {
                             Log.e("Interrupting task " + task +
                                     " tasks=" + getCountLocked() + "/" + tasks.size());
                             task.future.cancel(true);