原生Android应用中内嵌RN
环境以及版本：
python v2.7.13 x64 |
node v6.10.3 |
npm v3.10.10 |
Android Studio v2.2.2 |
React v15.4.1 |
React-Native v0.39.2 |
Android-SDK 23
1.用AS新建原生Android空项目
-
如图:
图1 -
创建完成后的文件目录结构如下：
图2
2.使用npm在原生android根目录下初始化项目
$ npm init
-
如图(注：name必须为全小写):
图3 修改package.json文件(这里之所以限定版本是因为不同版本之间可能会用兼容问题。在实际开发中发现"react": "15.4.1"与"react-native": "0.39.2"可以兼容)
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start"
}
"dependencies": {
"react": "15.4.1",
"react-native": "0.39.2"
}
-
修改后如下
图4
3.使用npm安装
$ npm install
安装过程中的报错信息，例如require react@某.某.某版本, but none was installed 说明react 和 react-native的版本不兼容需更换版本（测试中react 15.4.1 和react-native 0.39.2是兼容的）
-
出现以下情况说明下载成功，项目下会多一个node_modules里面就是react 和rn相关
图5
4.新建.flowconfig文件
在项目根目录下新建
.flowconfig文件
-
.flowconfig文件内容为:
[ignore]
; We fork some components by platform
.*/*[.]android.js
; Ignore templates for 'react-native init'
.*/local-cli/templates/.*
; Ignore the website subdir
<PROJECT_ROOT>/website/.*
; Ignore "BUCK" generated dirs
<PROJECT_ROOT>/\.buckd/
; Ignore unexpected extra "@providesModule"
.*/node_modules/.*/node_modules/fbjs/.*
; Ignore duplicate module providers
; For RN Apps installed via npm, "Libraries" folder is inside
; "node_modules/react-native" but in the source repo it is in the root
.*/Libraries/react-native/React.js
.*/Libraries/react-native/ReactNative.js
[include]
[libs]
Libraries/react-native/react-native-interface.js
flow/
[options]
emoji=true
module.system=haste
experimental.strict_type_args=true
munge_underscores=true
module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> 'RelativeImageStub'
suppress_type=$FlowIssue
suppress_type=$FlowFixMe
suppress_type=$FixMe
suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(4[0-5]\\|[1-3][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native_oss[a-z,_]*\\)?)\\)
suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(4[0-5]\\|[1-3][0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native_oss[a-z,_]*\\)?)\\)?:? #[0-9]+
suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
unsafe.enable_getters_and_setters=true
[version]
^0.45.0
5.项目根目录下新建 index.android.js
'use strict';
import React from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View
} from 'react-native';
class HelloWorld extends React.Component {
render() {
return (
<View style={styles.container}>
<Text style={styles.hello}>Hello, World</Text>
</View>
)
}
}
var styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
},
hello: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
});
AppRegistry.registerComponent('HelloWorld', () => HelloWorld);
6.修改app中build.gradle文件
-
文件位置
图6 将app中
build.gradle文件修改为:
配置文件中最大版本不能超过23最低不能低于16,添加以下信息到相应位置.
图7
7.为 React Native 添加一个 maven 依赖的入口
allprojects {
repositories {
...
maven {
// All of React Native (JS, Android binaries) is installed from npm
url "$rootDir/../node_modules/react-native/android"
}
}
...
}
-
如下图：
图8
8.在新建的原生android项目中新建一个用于装载RN的activity
- activity内容如下：
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.view.KeyEvent;
import com.facebook.react.ReactInstanceManager;
import com.facebook.react.ReactRootView;
import com.facebook.react.common.LifecycleState;
import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
import com.facebook.react.shell.MainReactPackage;
/**
* Created by jianghe on 2017/5/11.
*/
public class MyReactActivity extends Activity implements DefaultHardwareBackBtnHandler {
private ReactRootView mReactRootView;
private ReactInstanceManager mReactInstanceManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mReactRootView = new ReactRootView(this);
mReactInstanceManager = ReactInstanceManager.builder()
.setApplication(getApplication())
.setBundleAssetName("index.android.bundle")
.setJSMainModuleName("index.android")//制定ReactInstanceManager对应的js文件
.addPackage(new MainReactPackage())
.setUseDeveloperSupport(BuildConfig.DEBUG)
.setInitialLifecycleState(LifecycleState.RESUMED)
.build();
// 注意这里的HelloWorld必须对应“index.android.js”中的
// “AppRegistry.registerComponent()”的第一个参数
mReactRootView.startReactApplication(mReactInstanceManager, "HelloWorld", null);
setContentView(mReactRootView);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_MENU && mReactInstanceManager != null) {
mReactInstanceManager.showDevOptionsDialog();
return true;
}
return super.onKeyUp(keyCode, event);
}
@Override
public void invokeDefaultOnBackPressed() {
super.onBackPressed();
}
@Override
protected void onPause() {
super.onPause();
if (mReactInstanceManager != null) {
mReactInstanceManager.onHostPause(this);
}
}
@Override
protected void onResume() {
super.onResume();
if (mReactInstanceManager != null) {
mReactInstanceManager.onHostResume(this, this);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mReactInstanceManager != null) {
mReactInstanceManager.onHostDestroy();
}
}
@Override
public void onBackPressed() {
if (mReactInstanceManager != null) {
mReactInstanceManager.onBackPressed();
} else {
super.onBackPressed();
}
}
}
9.修改android清单文件
-
如下图：
图9
10.启动rn服务
$ npm start
补充个打包命令（将rn打包为bundle文件放入assets资源文件夹下）
$ react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output app/src/main/assets/index.android.bundle --assets-dest app/src/main/res/
后续会补充android+RN增量热更新以及预加载的文档
