3、添加RN界面
1、在项目根目录下新建index.js
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('AndroidRnDemoApp', () => HelloWorld);
2、新建一个Activity作为RN界面的容器，命名为RNActivity
package com.example.com.androidrndemo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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;
public class RNActivity extends AppCompatActivity 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")
.setJSMainModulePath("index")
.addPackage(new MainReactPackage())
.setUseDeveloperSupport(BuildConfig.DEBUG)
.setInitialLifecycleState(LifecycleState.RESUMED)
.build();
//这里的AndroidRnDemoApp必须对应“index.js”中的“AppRegistry.registerComponent()”的第一个参数
mReactRootView.startReactApplication(mReactInstanceManager, "AndroidRnDemoApp", null);
//加载ReactRootView到布局中
setContentView(mReactRootView);
}
@Override
public void invokeDefaultOnBackPressed() {
super.onBackPressed();
}
/**
* ReactInstanceManager生命周期同activity
*/
@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(this);
}
}
@Override
public void onBackPressed() {
if (mReactInstanceManager != null) {
mReactInstanceManager.onBackPressed();
} else {
super.onBackPressed();
}
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_MENU && mReactInstanceManager != null) {
mReactInstanceManager.showDevOptionsDialog();
return true;
}
return super.onKeyUp(keyCode, event);
}
}
3、在MainActivity中添加Intent跳转到RNActivity逻辑（button的点击触发）
package com.example.com.androidrndemo;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.AppCompatButton;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button=(Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
Intent intent = new Intent(MainActivity.this,RNActivity.class); //沟通两个activity的桥梁
startActivity(intent);
}
});
}
}
// layout_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.com.androidrndemo.MainActivity">
<Button android:id='@+id/button'
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="go RN Page"></Button>
</android.support.constraint.ConstraintLayout>
4、在Android-Manifest.xml中注册activity
<activity
android:name=".RNActivity"
android:theme="@style/Theme.AppCompat.Light.NoActionBar">
</activity> |
