Count accounts off main thread

app/src/main/java/com/todoroo/astrid/activity/MainActivity.java

@@ -39,6 +39,7 @@ import com.todoroo.astrid.subtasks.SubtasksHelper;
 import com.todoroo.astrid.subtasks.SubtasksListFragment;
 import com.todoroo.astrid.subtasks.SubtasksTagListFragment;
 import com.todoroo.astrid.timers.TimerControlSet;
+import io.reactivex.disposables.CompositeDisposable;
 import javax.inject.Inject;
 import org.tasks.LocalBroadcastManager;
 import org.tasks.R;
@@ -115,6 +116,7 @@ public class MainActivity extends InjectingAppCompatActivity
   @BindView(R.id.detail)
   FrameLayout detail;
 
+  private CompositeDisposable disposables = new CompositeDisposable();
   private NavigationDrawerFragment navigationDrawer;
   private int currentNightMode;
 
@@ -317,7 +319,14 @@ public class MainActivity extends InjectingAppCompatActivity
 
     localBroadcastManager.registerRepeatReceiver(repeatConfirmationReceiver);
 
-    syncAdapters.checkPlayServices(this);
+    disposables.add(syncAdapters.checkPlayServices(this));
+  }
+
+  @Override
+  protected void onDestroy() {
+    super.onDestroy();
+
+    disposables.dispose();
   }
 
   public void restart() {

app/src/main/java/org/tasks/data/CaldavDao.java

@@ -6,6 +6,7 @@ import androidx.room.Delete;
 import androidx.room.Insert;
 import androidx.room.Query;
 import androidx.room.Update;
+import io.reactivex.Single;
 import java.util.List;
 
 @Dao
@@ -20,6 +21,9 @@ public interface CaldavDao {
   @Query("SELECT * FROM caldav_account WHERE uuid = :uuid LIMIT 1")
   CaldavAccount getAccountByUuid(String uuid);
 
+  @Query("SELECT COUNT(*) FROM caldav_account")
+  Single<Integer> accountCount();
+
   @Query("SELECT * FROM caldav_account ORDER BY UPPER(name) ASC")
   List<CaldavAccount> getAccounts();
 

app/src/main/java/org/tasks/data/GoogleTaskListDao.java

@@ -6,11 +6,15 @@ import androidx.room.Insert;
 import androidx.room.OnConflictStrategy;
 import androidx.room.Query;
 import androidx.room.Update;
+import io.reactivex.Single;
 import java.util.List;
 
 @Dao
 public abstract class GoogleTaskListDao {
 
+  @Query("SELECT COUNT(*) FROM google_task_accounts")
+  public abstract Single<Integer> accountCount();
+
   @Query("SELECT * FROM google_task_accounts")
   public abstract List<GoogleTaskAccount> getAccounts();
 

app/src/main/java/org/tasks/gtasks/GtaskSyncAdapterHelper.java

@@ -1,6 +1,9 @@
 package org.tasks.gtasks;
 
 import android.app.Activity;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.schedulers.Schedulers;
 import javax.inject.Inject;
 import org.tasks.R;
 import org.tasks.analytics.Tracker;
@@ -35,13 +38,21 @@ public class GtaskSyncAdapterHelper {
     return !googleTaskListDao.getAccounts().isEmpty();
   }
 
-  public void checkPlayServices(Activity activity) {
-    if (hasAccounts()
-        && !playServices.refreshAndCheck()
-        && !preferences.getBoolean(R.string.warned_play_services, false)) {
-      preferences.setBoolean(R.string.warned_play_services, true);
-      playServices.resolve(activity);
-      tracker.reportEvent(Tracking.Events.PLAY_SERVICES_WARNING, playServices.getStatus());
-    }
+  public Disposable checkPlayServices(Activity activity) {
+    return googleTaskListDao
+        .accountCount()
+        .subscribeOn(Schedulers.io())
+        .observeOn(AndroidSchedulers.mainThread())
+        .subscribe(
+            count -> {
+              if (count > 0
+                  && !playServices.refreshAndCheck()
+                  && !preferences.getBoolean(R.string.warned_play_services, false)) {
+                preferences.setBoolean(R.string.warned_play_services, true);
+                playServices.resolve(activity);
+                tracker.reportEvent(
+                    Tracking.Events.PLAY_SERVICES_WARNING, playServices.getStatus());
+              }
+            });
   }
 }

app/src/main/java/org/tasks/jobs/WorkManager.java

@@ -4,11 +4,14 @@ import static com.todoroo.andlib.utility.AndroidUtilities.atLeastKitKat;
 import static com.todoroo.andlib.utility.AndroidUtilities.atLeastMarshmallow;
 import static com.todoroo.andlib.utility.AndroidUtilities.atLeastOreo;
 import static com.todoroo.andlib.utility.DateUtilities.now;
+import static io.reactivex.Single.just;
+import static io.reactivex.Single.zip;
 import static org.tasks.date.DateTimeUtils.midnight;
 import static org.tasks.date.DateTimeUtils.newDateTime;
 import static org.tasks.time.DateTimeUtils.currentTimeMillis;
 import static org.tasks.time.DateTimeUtils.printTimestamp;
 
+import android.annotation.SuppressLint;
 import android.app.AlarmManager;
 import android.app.PendingIntent;
 import android.content.Context;
@@ -26,6 +29,8 @@ import androidx.work.PeriodicWorkRequest;
 import androidx.work.Worker;
 import com.google.common.primitives.Longs;
 import com.todoroo.astrid.data.Task;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
 import java.util.List;
 import java.util.Random;
 import java.util.concurrent.TimeUnit;
@@ -109,6 +114,7 @@ public class WorkManager {
     updateBackgroundSync(null, null, null);
   }
 
+  @SuppressLint("CheckResult")
   public void updateBackgroundSync(
       @Nullable Boolean forceAccountPresent,
       @Nullable Boolean forceBackgroundEnabled,
@@ -117,18 +123,26 @@ public class WorkManager {
         forceBackgroundEnabled == null
             ? preferences.getBoolean(R.string.p_background_sync, true)
             : forceBackgroundEnabled;
-    boolean accountsPresent =
-        forceAccountPresent == null
-            ? (googleTaskListDao.getAccounts().size() > 0 || caldavDao.getAccounts().size() > 0)
-            : forceAccountPresent;
     boolean onlyOnWifi =
         forceOnlyOnUnmetered == null
             ? preferences.getBoolean(R.string.p_background_sync_unmetered_only, false)
             : forceOnlyOnUnmetered;
-    scheduleBackgroundSynchronization(backgroundEnabled && accountsPresent, onlyOnWifi);
-  }
 
-  private void scheduleBackgroundSynchronization(boolean enabled, boolean onlyOnUnmetered) {
+    //noinspection ResultOfMethodCallIgnored
+    (forceAccountPresent == null
+            ? zip(
+                googleTaskListDao.accountCount(),
+                caldavDao.accountCount(),
+                (googleCount, caldavCount) -> googleCount > 0 || caldavCount > 0)
+            : just(forceAccountPresent))
+        .subscribeOn(Schedulers.io())
+        .observeOn(AndroidSchedulers.mainThread())
+        .subscribe(
+            accountsPresent ->
+                scheduleBackgroundSync(backgroundEnabled && accountsPresent, onlyOnWifi));
+  }
+
+  private void scheduleBackgroundSync(boolean enabled, boolean onlyOnUnmetered) {
     Timber.d("background sync enabled: %s, onlyOnUnmetered: %s", enabled, onlyOnUnmetered);
     if (enabled) {
       workManager.enqueueUniquePeriodicWork(

app/src/main/java/org/tasks/sync/SyncAdapters.java

@@ -1,6 +1,7 @@
 package org.tasks.sync;
 
 import android.app.Activity;
+import io.reactivex.disposables.Disposable;
 import javax.inject.Inject;
 import org.tasks.data.CaldavDao;
 import org.tasks.gtasks.GtaskSyncAdapterHelper;
@@ -40,7 +41,7 @@ public class SyncAdapters {
     return caldavDao.getAccounts().size() > 0;
   }
 
-  public void checkPlayServices(Activity activity) {
-    gtaskSyncAdapterHelper.checkPlayServices(activity);
+  public Disposable checkPlayServices(Activity activity) {
+    return gtaskSyncAdapterHelper.checkPlayServices(activity);
   }
 }