Bug fix on saving apk

Author: reflecto-dev

source-code/app/src/main/java/org/buildmlearn/toolkit/activity/TemplateEditor.java

@@ -322,6 +322,10 @@ public void onClick(DialogInterface dialog, int id) {
                                 }
                                 break;
                             case R.id.save_apk:
+                                String savedFilePath = saveProject();
+                                if(savedFilePath == null || savedFilePath.length() == 0){
+                                    return;
+                                }
                                 String keyPassword = getString(R.string.key_password);
                                 String aliasName = getString(R.string.alias_name);
                                 String aliaspassword = getString(R.string.alias_password);