Solve the getDatabase called recursively problem when operating database in...

Solve the getDatabase called recursively problem when operating database in the DatabaseListener callback. issue https://github.com/LitePalFramework/LitePal/issues/528

core/src/main/java/org/litepal/LitePalApplication.java

@@ -18,8 +18,11 @@ package org.litepal;
 
 import org.litepal.exceptions.GlobalException;
 
+import android.annotation.SuppressLint;
 import android.app.Application;
 import android.content.Context;
+import android.os.Handler;
+import android.os.Looper;
 
 /**
  * Base class of LitePal to make things easier when developers need to use
@@ -44,8 +47,11 @@ public class LitePalApplication extends Application {
 	/**
 	 * Global application context.
 	 */
+	@SuppressLint("StaticFieldLeak")
 	public static Context sContext;
 
+	public static Handler sHandler = new Handler(Looper.getMainLooper());
+
 	/**
 	 * Construct of LitePalApplication. Initialize application context.
 	 */

core/src/main/java/org/litepal/tablemanager/LitePalOpenHelper.java

@@ -83,19 +83,29 @@ class LitePalOpenHelper extends SQLiteOpenHelper {
     @Override
     public void onCreate(SQLiteDatabase db) {
         Generator.create(db);
-        DatabaseListener listener = Operator.getDBListener();
+        final DatabaseListener listener = Operator.getDBListener();
         if (listener != null) {
-            listener.onCreate();
+            LitePalApplication.sHandler.post(new Runnable() {
+                @Override
+                public void run() {
+                    listener.onCreate();
+                }
+            });
         }
     }
 
     @Override
-    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+    public void onUpgrade(SQLiteDatabase db, final int oldVersion, final int newVersion) {
         Generator.upgrade(db);
         SharedUtil.updateVersion(LitePalAttr.getInstance().getExtraKeyName(), newVersion);
-        DatabaseListener listener = Operator.getDBListener();
+        final DatabaseListener listener = Operator.getDBListener();
         if (listener != null) {
-            listener.onUpgrade(oldVersion, newVersion);
+            LitePalApplication.sHandler.post(new Runnable() {
+                @Override
+                public void run() {
+                    listener.onUpgrade(oldVersion, newVersion);
+                }
+            });
         }
     }