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How can I create ViewModel containing DAO object in Dager 2?

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0

I create android ViewModel in Activity:

EventViewModel model = ViewModelProviders.of(this).get(EventViewModel.class);

For this I create EventViewModel :

public class EventViewModel extends ViewModel 

 private final EventDao eventDao;

 public EventViewModel(EventDao eventDao) 
 this.eventDao = eventDao;
 

 public void createEvent(final Event event) 
 new Thread(new Runnable() 
 @Override
 public void run() 
 eventDao.insert(event);
 
 ).start();
 

I learned that I must create custom factory in order to inject my EventDao to EventViewModel. Ok, let's say i did it.

public class ViewModelFactory implements ViewModelProvider.Factory 

 private final EventDao eventDao;

 @Inject
 public ViewModelFactory(EventDao eventDao) 
 this.eventDao = eventDao;
 


 @NonNull
 @Override
 public <T extends ViewModel> T create(@NonNull Class<T> modelClass) 
 if (modelClass == EventViewModel.class) 
 return (T) new EventViewModel(eventDao);
 
 return null;
 

but what to do next? I see several ways. If belive to examples from google I must do next in MyActivity:

EventViewModel model = ViewModelProviders.of(this, new ModelFactory(eventDao)).get(EventViewModel.class);

1) But where do i get eventDao in MyActivity?

2) Do I need create custom ModelFactory for each ViewModel if it use dao class in?

I use Dagger 2 and I just want understand how can I create ViewModel with DAO and use this ViewModel in MyActivity?

java android mvvm dagger-2

share|improve this question

asked Mar 23 at 10:57

ip696ip696

1,39621543

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can create DatabaseModule class and provide dao from that class. So You just need to @Injet the Dao in your activity
  
  – Pallavi Tapkir
  Mar 25 at 13:12
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please add the code for your Component which you are trying to configure with @Inject
  
  – EpicPandaForce
  Mar 25 at 21:46
  

  
  
  
  

add a comment | 

0

I create android ViewModel in Activity:

EventViewModel model = ViewModelProviders.of(this).get(EventViewModel.class);

For this I create EventViewModel :

public class EventViewModel extends ViewModel 

 private final EventDao eventDao;

 public EventViewModel(EventDao eventDao) 
 this.eventDao = eventDao;
 

 public void createEvent(final Event event) 
 new Thread(new Runnable() 
 @Override
 public void run() 
 eventDao.insert(event);
 
 ).start();
 

I learned that I must create custom factory in order to inject my EventDao to EventViewModel. Ok, let's say i did it.

public class ViewModelFactory implements ViewModelProvider.Factory 

 private final EventDao eventDao;

 @Inject
 public ViewModelFactory(EventDao eventDao) 
 this.eventDao = eventDao;
 


 @NonNull
 @Override
 public <T extends ViewModel> T create(@NonNull Class<T> modelClass) 
 if (modelClass == EventViewModel.class) 
 return (T) new EventViewModel(eventDao);
 
 return null;
 

but what to do next? I see several ways. If belive to examples from google I must do next in MyActivity:

EventViewModel model = ViewModelProviders.of(this, new ModelFactory(eventDao)).get(EventViewModel.class);

1) But where do i get eventDao in MyActivity?

2) Do I need create custom ModelFactory for each ViewModel if it use dao class in?

I use Dagger 2 and I just want understand how can I create ViewModel with DAO and use this ViewModel in MyActivity?

java android mvvm dagger-2

share|improve this question

asked Mar 23 at 10:57

ip696ip696

1,39621543

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You can create DatabaseModule class and provide dao from that class. So You just need to @Injet the Dao in your activity
  
  – Pallavi Tapkir
  Mar 25 at 13:12
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please add the code for your Component which you are trying to configure with @Inject
  
  – EpicPandaForce
  Mar 25 at 21:46
  

  
  
  
  

add a comment | 

I create android ViewModel in Activity:

EventViewModel model = ViewModelProviders.of(this).get(EventViewModel.class);

For this I create EventViewModel :

public class EventViewModel extends ViewModel 

 private final EventDao eventDao;

 public EventViewModel(EventDao eventDao) 
 this.eventDao = eventDao;
 

 public void createEvent(final Event event) 
 new Thread(new Runnable() 
 @Override
 public void run() 
 eventDao.insert(event);
 
 ).start();
 

I learned that I must create custom factory in order to inject my EventDao to EventViewModel. Ok, let's say i did it.

public class ViewModelFactory implements ViewModelProvider.Factory 

 private final EventDao eventDao;

 @Inject
 public ViewModelFactory(EventDao eventDao) 
 this.eventDao = eventDao;
 


 @NonNull
 @Override
 public <T extends ViewModel> T create(@NonNull Class<T> modelClass) 
 if (modelClass == EventViewModel.class) 
 return (T) new EventViewModel(eventDao);
 
 return null;
 

but what to do next? I see several ways. If belive to examples from google I must do next in MyActivity:

EventViewModel model = ViewModelProviders.of(this, new ModelFactory(eventDao)).get(EventViewModel.class);

1) But where do i get eventDao in MyActivity?

2) Do I need create custom ModelFactory for each ViewModel if it use dao class in?

I use Dagger 2 and I just want understand how can I create ViewModel with DAO and use this ViewModel in MyActivity?

java android mvvm dagger-2

share|improve this question

asked Mar 23 at 10:57

ip696ip696

1,39621543

EventViewModel model = ViewModelProviders.of(this).get(EventViewModel.class);

public class EventViewModel extends ViewModel 

 private final EventDao eventDao;

 public EventViewModel(EventDao eventDao) 
 this.eventDao = eventDao;
 

 public void createEvent(final Event event) 
 new Thread(new Runnable() 
 @Override
 public void run() 
 eventDao.insert(event);
 
 ).start();
 

public class ViewModelFactory implements ViewModelProvider.Factory 

 private final EventDao eventDao;

 @Inject
 public ViewModelFactory(EventDao eventDao) 
 this.eventDao = eventDao;
 


 @NonNull
 @Override
 public <T extends ViewModel> T create(@NonNull Class<T> modelClass) 
 if (modelClass == EventViewModel.class) 
 return (T) new EventViewModel(eventDao);
 
 return null;
 

EventViewModel model = ViewModelProviders.of(this, new ModelFactory(eventDao)).get(EventViewModel.class);

java android mvvm dagger-2

java android mvvm dagger-2

share|improve this question

asked Mar 23 at 10:57

ip696ip696

1,39621543

share|improve this question

asked Mar 23 at 10:57

ip696ip696

1,39621543

asked Mar 23 at 10:57

ip696ip696

1,39621543

asked Mar 23 at 10:57

ip696ip696

1,39621543

1 Answer
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0

You inject ViewModelFactory in the activity. ViewModelFactory will get EventDao through constructor injection. You pass the injected ViewModelFactory instance say viewModelFactory to ViewModelProviders

EventViewModel model = ViewModelProviders.of(this, viewModelFactory).get(EventViewModel.class);

share|improve this answer

answered Apr 17 at 7:33

ninad thakareninad thakare

613

add a comment | 

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0

You inject ViewModelFactory in the activity. ViewModelFactory will get EventDao through constructor injection. You pass the injected ViewModelFactory instance say viewModelFactory to ViewModelProviders

EventViewModel model = ViewModelProviders.of(this, viewModelFactory).get(EventViewModel.class);

share|improve this answer

answered Apr 17 at 7:33

ninad thakareninad thakare

613

add a comment | 

0

You inject ViewModelFactory in the activity. ViewModelFactory will get EventDao through constructor injection. You pass the injected ViewModelFactory instance say viewModelFactory to ViewModelProviders

EventViewModel model = ViewModelProviders.of(this, viewModelFactory).get(EventViewModel.class);

share|improve this answer

answered Apr 17 at 7:33

ninad thakareninad thakare

613

add a comment | 

You inject ViewModelFactory in the activity. ViewModelFactory will get EventDao through constructor injection. You pass the injected ViewModelFactory instance say viewModelFactory to ViewModelProviders

EventViewModel model = ViewModelProviders.of(this, viewModelFactory).get(EventViewModel.class);

share|improve this answer

answered Apr 17 at 7:33

ninad thakareninad thakare

613

share|improve this answer

answered Apr 17 at 7:33

ninad thakareninad thakare

613

answered Apr 17 at 7:33

ninad thakareninad thakare

613

answered Apr 17 at 7:33

ninad thakareninad thakare

613