CommModule.java

package com.example.song.reactnativeappdemo.communication;

import android.content.Intent;
import android.net.Uri;
import android.util.Log;

import com.facebook.react.bridge.Callback;
import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import com.facebook.react.modules.core.DeviceEventManagerModule;

/**
 * 通信Module类
 * Created by Song on 2017/2/17.
 */
public class CommModule extends ReactContextBaseJavaModule {

    private ReactApplicationContext mContext;
    public static final String MODULE_NAME = "commModule";
    public static final String EVENT_NAME = "nativeCallRn";
    public static final String EVENT_NAME1 = "getPatchImgs";
    /**
     * 构造方法必须实现
     * @param reactContext
     */
    public CommModule(ReactApplicationContext reactContext) {
        super(reactContext);
        this.mContext = reactContext;
    }

    /**
     * 在rn代码里面是需要这个名字来调用该类的方法
     * @return
     */
    @Override
    public String getName() {
        return MODULE_NAME;
    }

    /**
     * RN调用Native的方法
     * @param phone
     */
    @ReactMethod
    public void rnCallNative(String phone) {

        // 跳转到打电话界面
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_CALL);
        intent.setData(Uri.parse("tel:" + phone));
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // 跳转需要添加flag, 否则报错
        mContext.startActivity(intent);
    }

    /**
     * Native调用RN
     * @param msg
     */
    public void nativeCallRn(String msg) {
        mContext.getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
                .emit(EVENT_NAME,msg);
    }

    /**
     * Callback 方式
     * rn调用Native,并获取返回值
     * @param msg
     * @param callback
     */
    @ReactMethod
    public void rnCallNativeFromCallback(String msg, Callback callback) {

        // 1.处理业务逻辑...
        String result = "处理结果：" + msg;
        // 2.回调RN,即将处理结果返回给RN
        callback.invoke(result);
    }

    /**
     * Promise
     * @param msg
     * @param promise
     */
    @ReactMethod
    public void rnCallNativeFromPromise(String msg, Promise promise) {

        Log.e("---","adasdasda");
        // 1.处理业务逻辑...
        String result = "处理结果：" + msg;
        // 2.回调RN,即将处理结果返回给RN
        promise.resolve(result);
    }
}