添加rn入口配置文件

.gitignore

+node_modules/
\ No newline at end of file

App.js

+/**
+ * Sample React Native App
+ * https://github.com/facebook/react-native
+ *
+ * @format
+ * @flow strict-local
+ */
+
+import React from 'react';
+import {
+  SafeAreaView,
+  StyleSheet,
+  ScrollView,
+  View,
+  Text,
+  StatusBar,
+} from 'react-native';
+
+import {
+  Header,
+  LearnMoreLinks,
+  Colors,
+  DebugInstructions,
+  ReloadInstructions,
+} from 'react-native/Libraries/NewAppScreen';
+
+const App: () => React$Node = () => {
+  return (
+    <>
+      <StatusBar barStyle="dark-content" />
+      <SafeAreaView>
+        <ScrollView
+          contentInsetAdjustmentBehavior="automatic"
+          style={styles.scrollView}>
+          <Header />
+          {global.HermesInternal == null ? null : (
+            <View style={styles.engine}>
+              <Text style={styles.footer}>Engine: Hermes(need config!!!!)</Text>
+            </View>
+          )}
+          <View style={styles.body}>
+            <View style={styles.sectionContainer}>
+              <Text style={styles.sectionTitle}>Step One 111</Text>
+              <Text style={styles.sectionDescription}>
+                Edit <Text style={styles.highlight}>App.js</Text> to change this
+                screen and then come back to see your edits.
+              </Text>
+            </View>
+            <View style={styles.sectionContainer}>
+              <Text style={styles.sectionTitle}>See Your Changes 2222</Text>
+              <Text style={styles.sectionDescription}>
+                <ReloadInstructions />
+              </Text>
+            </View>
+            <View style={styles.sectionContainer}>
+              <Text style={styles.sectionTitle}>Debug 3333</Text>
+              <Text style={styles.sectionDescription}>
+                <DebugInstructions />
+              </Text>
+            </View>
+            <View style={styles.sectionContainer}>
+              <Text style={styles.sectionTitle}>Learn More 4444</Text>
+              <Text style={styles.sectionDescription}>
+                Read the docs to discover what to do next:
+              </Text>
+            </View>
+            <LearnMoreLinks />
+          </View>
+        </ScrollView>
+      </SafeAreaView>
+    </>
+  );
+};
+
+const styles = StyleSheet.create({
+  scrollView: {
+    backgroundColor: Colors.lighter,
+  },
+  engine: {
+    position: 'absolute',
+    right: 0,
+  },
+  body: {
+    backgroundColor: Colors.white,
+  },
+  sectionContainer: {
+    marginTop: 32,
+    paddingHorizontal: 24,
+  },
+  sectionTitle: {
+    fontSize: 24,
+    fontWeight: '600',
+    color: "#FF0000",
+  },
+  sectionDescription: {
+    marginTop: 8,
+    fontSize: 18,
+    fontWeight: '400',
+    color: Colors.dark,
+  },
+  highlight: {
+    fontWeight: '700',
+  },
+  footer: {
+    color: Colors.dark,
+    fontSize: 12,
+    fontWeight: '600',
+    padding: 4,
+    paddingRight: 12,
+    textAlign: 'right',
+  },
+});
+
+export default App;

android @ a3c05179

-Subproject commit 2ce40a8eb653fa80514b4b83478cad0686e15b1c
+Subproject commit a3c051798cd3891c630fc5271346d67120eeb062

app.json

+{
+  "name": "submoduleTest",
+  "displayName": "submoduleTest"
+}
\ No newline at end of file

index.js

+/**
+ * @format
+ */
+
+import {AppRegistry} from 'react-native';
+import App from './App';
+import {name as appName} from './app.json';
+
+AppRegistry.registerComponent(appName, () => App);

package.json

+{
+  "name": "submoduleTest",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "android": "react-native run-android",
+    "ios": "react-native run-ios",
+    "start": "react-native start",
+    "test": "jest",
+    "lint": "eslint ."
+  },
+  "dependencies": {
+    "react": "16.13.1",
+    "react-native": "^0.63.2"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.8.4",
+    "@babel/runtime": "^7.8.4",
+    "@react-native-community/eslint-config": "^1.1.0",
+    "babel-jest": "^25.1.0",
+    "eslint": "^6.5.1",
+    "jest": "^25.1.0",
+    "metro-react-native-babel-preset": "^0.59.0",
+    "react-test-renderer": "16.13.1"
+  },
+  "jest": {
+    "preset": "react-native"
+  }
+}