Merge pull request #41 from imfms/bugfix-no_progress_listener_migrate…

…_method_process_npe bigfix-MigrationHelper_no_progress_listener_migrate_override_method_p…
yuweiguocn · Jan 12, 2018 · ef7a58e · ef7a58e
2 parents 3287bb2 + 702acff
commit ef7a58e
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/library/src/main/java/com/github/yuweiguocn/library/greendao/MigrationHelper.java b/library/src/main/java/com/github/yuweiguocn/library/greendao/MigrationHelper.java
@@ -59,7 +59,11 @@ public static void migrate(Database database, Class<? extends AbstractDao<?, ?>>
         generateTempTables(database, daoClasses);
         printLog("【Generate temp table】complete");
 
-        ReCreateAllTableListener listener = weakListener.get();
+        ReCreateAllTableListener listener = null;
+        if (weakListener != null) {
+            listener = weakListener.get();
+        }
+
         if (listener != null) {
             listener.onDropAllTables(database, true);
             printLog("【Drop all table by listener】");