如何将对象从React本机Android模块传递回Javascript

您可以使用 WritableMap 只需通过回调传递映射值。

@ReactMethod
public void pass(Callback cb) {
    HashMap<String, String> hm = new HashMap<>();
    hm.put("A", "one");
    hm.put("B", "Two");
    hm.put("C", "Three");
    WritableMap map = new WritableNativeMap();
    for (Map.Entry<String, String> entry : hm.entrySet()) {
        map.putString(entry.getKey(), entry.getValue());
    }
    cb.invoke(map);
}

blog .

对于 React Native >=0.62

import com.facebook.react.bridge.WritableMap;
import com.facebook.react.bridge.Arguments;

@ReactMethod
public void test(Callback callback) {
    WritableMap map = Arguments.createMap();

    map.putString("yourKey", "yourValue");

    callback.invoke(map);
}

要在React native中调用本机函数,请执行以下操作:

import { NativeModules } from 'react-native';

NativeModules["replaceWithTheModuleName"].test(res => {
  console.log(res);
})