success call entity method

Android/app/src/main/java/com/github/pengfeizhou/hegodemo/MainActivity.java

@@ -13,6 +13,6 @@ public class MainActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         HegoContext hegoContext = HegoContext.createContext(HegoUtils.readAssetFile("demo.js"), "demo");
-        hegoContext.callJS("");
+        hegoContext.callJS("log");
     }
 }