livedataBus

原创已于 2022-03-29 15:15:58 修改 · 388 阅读

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#android

于 2022-03-28 14:54:18 首次发布

1.创建类工具类”

public class MLiveDataBus {
    private static MLiveDataBus liveDataBus = new MLiveDataBus();
    private HashMap<String, MutableLiveData<Object>> map;

    private MLiveDataBus() {

        map = new HashMap<>();

    }

    public static MLiveDataBus getDefault() {
        return liveDataBus;

    }

    public synchronized <T> MutableLiveData<T> post(Class<T> type) {
        String simpleName = type.getSimpleName();
        Log.d("TAG", "post: " + simpleName);
        if (!map.containsKey(simpleName)) {
            map.put(simpleName, new MutableLiveData<>());
        }

        return (MutableLiveData<T>) map.get(simpleName);
    }

    public synchronized <T> void remove(Class<T> type) {
        String simpleName = type.getSimpleName();
        Log.d("TAG", "post: " + simpleName);
        if (map.containsKey(simpleName)) {
            map.remove(simpleName);
        }

    }
}

2.发送数据：

MLiveDataBus.getDefault().post(WeatherEvent.class).postValue(weatherEvent);

3.接受数据：

MLiveDataBus.getDefault().post(WeatherEvent.class).observe(this, new Observer<WeatherEvent>() {
    @Override
    public void onChanged(WeatherEvent weatherBean) {
        weather = weatherBean;
        binding.tvLocation.setText(weatherBean.getCity());
        binding.scrollTextView.setText(weatherBean.getWeather());
    }
});