React Native 与 嵌入Android原生与Activity页面互相跳转

在React Native项目中，你可以通过自定义原生模块来实现与Android原生Activity页面的互相跳转。以下是一个简单的例子，展示如何从React Native跳转到一个原生Activity，并返回。

1. 创建一个自定义模块NativeToRNActivityModule.java:

package com.yourpackage;
 
import android.app.Activity;
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.Callback;
 
public class NativeToRNActivityModule extends ReactContextBaseJavaModule {
 
    private static final String MODULE_NAME = "NativeToRNActivityModule";
    private Activity mCurrentActivity;
 
    public NativeToRNActivityModule(ReactApplicationContext context) {
        super(context);
        mCurrentActivity = getCurrentActivity();
    }
 
    @Override
    public String getName() {
        return MODULE_NAME;
    }
 
    @ReactMethod
    public void startNativeActivity(Callback callback) {
        Intent intent = new Intent(mCurrentActivity, NativeActivity.class);
        mCurrentActivity.startActivityForResult(intent, 123);
        mCallback = callback;
    }
 
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 123 && mCallback != null) {
            Bundle bundle = data.getExtras();
            String result = bundle.getString("result");
            mCallback.invoke(result);
        }
    }
 
    private Callback mCallback;
}

2. 在NativeActivity.java中，当需要返回数据到React Native时，可以这样做：

Intent intent = new Intent();
Bundle bundle = new Bundle();
bundle.putString("result", "Some data from Native Activity");
intent.putExtras(bundle);
setResult(RESULT_OK, intent);
finish();

3. 在React Native项目中，注册模块：

// MainApplication.java or your own native module registration file
 
import com.yourpackage.NativeToRNActivityModule; // import the module
 
public class MainApplication extends Application implements Reac