问题

如果我有一个观察某些LiveData的ViewModel，并且使用以下代码行：

```java
myViewModel.getData.observe(getViewLifeCycle(), Observer);

如果我在我的ViewModel中有另一个LiveData data2，并且我开始观察这个数据：

myViewModel.getData2.observe(getViewLifeCyle(), Observer);

第一个观察者会发生什么？这会被视为内存泄漏吗？
在开始观察另一个数据之前，我应该移除对数据的所有观察者吗？

编辑：
我有一个用于观察来自Room数据库中数据的SearchBar代码如下：

@Override
public boolean onQueryTextChange(String s) {
    String query = "%" + s + "%";
    Log.d(TAG, "onQueryTextChange: " + query);
    problemViewModel.getProblemsByQuery(query).observe(getViewLifecycleOwner(), observer);
    return true;
}

我关注这一行：

problemViewModel.getProblemsByQuery(query).observe(getViewLifecycleOwner(), observer);

我在方法内多次重复这行代码，每当文本发生变化时。这会引发问题吗？

<details>
<summary>英文:</summary>

What happens if I have a ViewModel that observes some LiveData With the following line of code

myViewModel.getData.observe(getViewLifeCycle(),Observer);

what if I have anther LiveData data2 inside my view model and I started observing this data.

myViewModel.getData2.observe(getViewLifeCyle(),Observer);

what happens for the first observer ? is that considered to be a memory leak? 
should I remove all the observers on the data before I go observing anther data?

EDIT : 
I have the following code for a SearchBar that I use to Observe the data from Room Database.

    @Override
                public boolean onQueryTextChange(String s) {
                    String query =  "%" + s + "%";
                    Log.d(TAG, "onQueryTextChange: " + query);
                    problemViewModel.getProblemsByQuery(query).observe(getViewLifecycleOwner(),observer);
                    return true;
                }
                    
                        
I'm concerned with this line.

    problemViewModel.getProblemsByQuery(query).observe(getViewLifecycleOwner(),observer);

I repeat it over and over inside the method whenever the text changes. so will that cause a problem?

</details>


# 答案1
**得分**: 0

这里目前没有明显的泄漏。您当然可以同时观察尽可能多的 LiveData - 只要能够放入内存中。如果需要的话，它们都可以共享同一个观察者对象。

<details>
<summary>英文:</summary>

There is no leak immediately visible here.  You can certainly observe as many LiveData as you want simultaneously - as many as you can fit into memory.  And they can all share the same observer object, if that&#39;s what you want.


</details>