[RN] NetworkActivityIndicator

The basic indicator is extracted into a LoadingIndicator component,
which then NetworkActivityIndicator displays (or not) based on network
activity.

react/features/base/react/components/native/LoadingIndicator.js

@@ -0,0 +1,24 @@
+/* @flow */
+
+import React, { Component } from 'react';
+import { ActivityIndicator } from 'react-native';
+
+/**
+ * Simple wrapper around React Native's {@code ActivityIndicator}, which
+ * displays an animated (large) loading indicator.
+ */
+export default class LoadingIndicator extends Component {
+    /**
+     * Implements React's {@link Component#render()}.
+     *
+     * @inheritdoc
+     * @returns {ReactElement}
+     */
+    render() {
+        return (
+            <ActivityIndicator
+                animating = { true }
+                size = { 'large' } />
+        );
+    }
+}

react/features/base/react/components/native/index.js

@@ -1,3 +1,4 @@
 export { default as Container } from './Container';
 export { default as Link } from './Link';
+export { default as LoadingIndicator } from './LoadingIndicator';
 export { default as Text } from './Text';