Add JNI wrapper for InitUCBHelper() and call it

android/Bootstrap/src/org/libreoffice/android/Bootstrap.java

@@ -93,6 +93,10 @@ public class Bootstrap extends NativeActivity
     // where the lo-bootstrap library is.
     public static native void setCommandArgs(String[] argv);
 
+    // A wrapper for InitUCBHelper() in he ucbhelper library
+    // (contentbroker.cxx), also this called indirectly through the lo-bootstrap library
+    public static native void initUCBHelper();
+
     public static void setup(Activity activity)
     {
         String dataDir = null;

android/experiments/DocumentLoader/src/org/libreoffice/android/examples/DocumentLoader.java

@@ -91,6 +91,8 @@ public class DocumentLoader
 
             Log.i(TAG, "oDesktop is" + (oDesktop!=null ? " not" : "") + " null");
 
+            Bootstrap.initUCBHelper();
+
             com.sun.star.frame.XComponentLoader xCompLoader =
                 (com.sun.star.frame.XComponentLoader)
                      UnoRuntime.queryInterface(

sal/android/lo-bootstrap.c

@@ -1577,6 +1577,27 @@ Java_org_libreoffice_android_Bootstrap_setCommandArgs(JNIEnv* env,
     (*osl_setCommandArgs)(c_argc, c_argv);
 }
 
+// public static native void initUCBhelper();
+
+__attribute__ ((visibility("default")))
+void
+Java_org_libreoffice_android_Bootstrap_initUCBHelper(JNIEnv* env,
+                                                     jobject clazz)
+{
+    void (*InitUCBHelper)(void);
+    (void) env;
+    (void) clazz;
+
+    /* This obviously should be called only after the ucbhelper so has been loaded */
+
+    InitUCBHelper = dlsym(RTLD_DEFAULT, "InitUCBHelper");
+    if (InitUCBHelper == NULL) {
+        LOGE("InitUCBHelper: InitUCBHelper not found");
+        return;
+    }
+    (*InitUCBHelper)();
+}
+
 __attribute__ ((visibility("default")))
 JavaVM *
 lo_get_javavm(void)