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Is it possible to make one LiveData of two LiveDatas?

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醉梦人生
醉梦人生 2020-12-03 18:59

I have two DAOs, two Repositories and two POJOs. There is some way to create one Livedata of two? I need it to make single list for Recyclerview. POJOs are similar objects.<

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  • 不思量自难忘°
    不思量自难忘° (楼主)
    2020-12-03 19:23

    Let's say you want to merge LiveData> & LiveData> then, you'll need to take MediatorLiveData (why? because, both of your live data are of different types).

    So, use code like below :

    LiveData liveData1 = getAllExpensesByDay();
LiveData liveData2 = getAllIncomesByDay();
MediatorLiveData liveDataMerger = new MediatorLiveData();
liveDataMerger.addSource(liveData1, value -> liveDataMerger.setValue(value));
liveDataMerger.addSource(liveData2, value -> liveDataMerger.setValue(value));



    If you need to use specific data from MediatorLiveData then use Transformations on that.
    


    Check out more here
    
    
    
             
    
                                                        
    
            
            
    
              
                
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