ReactNative-JS 調用原生方法實例代碼(轉載)
阿新 • • 發佈：2018-05-01
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第一步首先創建ReactNative 模塊類繼承ReactContextBaseJavaModule
package com.mixture;
import android.content.Context;
import android.widget.Toast;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;public class MyNativeModule extends ReactContextBaseJavaModule {
public static final String REACTCLASSNAME = "MyNativeModule";
private Context mContext;
public MyNativeModule(ReactApplicationContext reactContext) {
super(reactContext);
mContext = reactContext;
}
@Override public String getName() {
return REACTCLASSNAME;
}
/**
* 必須添加反射註解不然會報錯
* 這個方法就是ReactNative將要調用的方法，會通過此類名字調用
* @param msg
*/
@ReactMethod
public void callNativeMethod(String msg) {
Toast.makeText(mContext, msg, Toast.LENGTH_SHORT).show();
}
}
第二步創建一個React包管理器實現ReactPackage將每個模塊放到模塊集合中
package com.mixture;
import com.facebook.react.ReactPackage;
import com.facebook.react.bridge.JavaScriptModule;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.ViewManager;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Created by Administrator on 2016/9/22.
*/
public class MyReactPackage implements ReactPackage {
@Override
public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
List<NativeModule> modules = new ArrayList<>();
modules.add(new MyNativeModule(reactContext));
return modules;
}
@Override
public List<Class<? extends JavaScriptModule>> createJSModules() {
return Collections.emptyList();
}
@Override
public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
return Collections.emptyList();
}
}
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第三步在應用入口註冊這個React包管理器
package com.mixture;
import android.app.Application;
import android.util.Log;
import com.facebook.react.ReactApplication;
import com.facebook.react.ReactInstanceManager;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import java.util.Arrays;
import java.util.List;
public class MainApplication extends Application implements ReactApplication {
private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
@Override
protected boolean getUseDeveloperSupport() {
return BuildConfig.DEBUG;
}
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(),
//在應用中註冊這個包管理器
new MyReactPackage()
);
}
};
@Override
public ReactNativeHost getReactNativeHost() {
return mReactNativeHost;
}
}
第四步就是在ReactNative中調用react-native中提供一個NativeModules通過模塊名字和方法名字進行調用
/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, {Component} from ‘react‘;
import {
AppRegistry,
StyleSheet,
Text,
View,
NativeModules,
} from ‘react-native‘;
class Mixture extends Component {
render() {
return (
<View style={styles.container}>
<Text style={styles.instructions} onPress={() => this.onClick()}>
調用用原生方法
</Text>
</View>
);
}
/**
* 調用原生方法
*/
onClick() {
NativeModules.MyNativeModule.callNativeMethod(‘成功調用原生方法‘);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: ‘center‘,
alignItems: ‘center‘,
backgroundColor: ‘#F5FCFF‘,
},
instructions: {
textAlign: ‘center‘,
color: ‘#333333‘,
marginBottom: 5,
},
});
AppRegistry.registerComponent(‘Mixture‘, () => Mixture);
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ReactNative-JS 調用原生方法實例代碼(轉載)