react native 使用Native Module、Intent、广播接收器 实现正副双屏的两个app之间的相互通信

// AndroidNativeModule.java
import android.content.Intent;
import android.os.Bundle;
import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import com.facebook.react.bridge.WritableMap;

public class AndroidNativeModule extends ReactContextBaseJavaModule {

    public AndroidNativeModule(ReactApplicationContext context) {
        super(context);
    }

    @Override
    public String getName() {
        return "AndroidNativeModule";
    }

    @ReactMethod
    public void sendDataToSecondScreen(String key, String value) {
        Intent intent = new Intent("ACTION_SEND_DATA");
        Bundle bundle = new Bundle();
        bundle.putString(key, value);
        intent.putExtras(bundle);
        // 发送广播到副屏应用
        getReactApplicationContext().sendBroadcast(intent);
    }
}

// MainApplication.java
import com.facebook.react.ReactApplication;
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
        public boolean getUseDeveloperSupport() {
            return BuildConfig.DEBUG;
        }

        @Override
        protected List<ReactPackage> getPackages() {
            return Arrays.<ReactPackage>asList(
                new MainReactPackage(),
                // 添加自定义的Package
                new CustomReactPackage()
            );
        }
    };

    @Override
    public ReactNativeHost getReactNativeHost() {
        return mReactNativeHost;
    }
}

// SecondScreenActivity.java
public class SecondScreenActivity extends Activity {

    private BroadcastReceiver mIntentR