Thanks!

[dattran2346]

Thank you for your submission

• 20h!! You really pushed effort on doing the prework, I really appreciate that
• How you have learnt Android? I just wondering?

Good Stuff

• Using custom ArrayAdapter with ListView
• Implement persistent database using SQLOpenHelper and ContentValues

Suggesstions

• Try yourself with RecyclerView and RecyclerAdapter, they are very similar to ListView and ArrayAdapter
• Instead of using putExtra("item"), you can extract the item string into public final String ITEM = "item" constant, I have seen people make bugs because they mistype the word
• Try ButterKnife, this is a very easy to use library to reduce findViewById() boilerplate code, they also support onClick() very nicely
• Instead of using Save and Cancel button, try using ItemMenu and Toolbar instead, that will look definitely better
• Try to tweak UI more, the UI is better than the naive implementation in the tutorial, however it doen't look nice enough

[ledaian41]

Thanks for your suggestion, @dattran2346 I'm trying improve my prework. I'm a beginner in Android, I have learned from many toturials online. There are few issues that I'm not fully understood.

[dattran2346]

@ledaian41 What issue are you not really understood? Perhaps I can help you? Ps: Sorry for late reply to you 😭

[ledaian41]

@dattran2346

• It's about RecyclerView, how can I handle onItemClick event and get item's position? In ListView, I have handled onItemClick event easily but in RecyclerView, I could not found onItemClickListener. :(
• About Context, does every activity have a context ? and can I call or use a context in an other activity ? While searching for ViewHolder, I found that can get context from parameter ViewGroup. Many thanks,

[dattran2346]

@ledaian41

• You can do this in RecyclerViewAdapter:

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
   holder.itemView.setOnClickListener(v -> {

   });    
}

• Activity is the subclass of Context; but View has Context, you can see that in View construction. People usually pass the activity via RecyclerAdapter construction, the ViewGroup is actually the RecyclerView where the Adapter attach to. Because ViewGroup is also a View, so you can also use Context from ViewGroup. Choose whatever you favor.

Ps: Does that make sense to you?

[ledaian41]

@dattran2346 Thank you, I have understood about Context and have handled onItemClick event in RecyclerViewAdapter. Many thanks,