從ListView適配器轉換爲RecyclerView適配器的片段

Question

我的項目基於片段，我試圖實現HypeLabs網狀網絡聊天作爲額外的功能。如何將附加URL中顯示的Hype Labs Github項目中的活動轉換爲諸如ChatFragment和ContactsFragment之類的片段。

原來ContactsViewAdapter如下：

public class DirectContactsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 
protected final Activity mActivity; 
private Map<String, Store> stores; 

public DirectContactsAdapter(@NonNull Activity mActivity, Map<String, Store> stores) { 
    this.mActivity = mActivity; 
    this.stores = stores; 
} 

protected Map<String, Store> getStores() { 
    return stores; 
} 

@Override 
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View itemView; 
    itemView = LayoutInflater.from(mActivity).inflate(R.layout.row_direct_contacts, parent, false); 
    return new DirectContactsViewHolder(itemView); 

} 

@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 

    if(holder instanceof DirectContactsViewHolder) { 
     final DirectContactsViewHolder directContactsHolder = (DirectContactsViewHolder) holder; 
     final Store contactsStore = this.stores.get(position); 
     try { 
      directContactsHolder.displayName.setText(contactsStore.getInstance().getRealmStringIdentifier()); 
      directContactsHolder.contentIndicator.setVisibility(contactsStore.hasNewMessages 
        () ? View.VISIBLE : View.INVISIBLE); 

      holder.itemView.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 

          Intent intent = new Intent(DirectContactsFragment.this, DirectChatsFragment 
            .class); 

          TextView displayName = (TextView) view.findViewById(R.id.display_name); 
          CharSequence charSequence = displayName.getText(); 

          setDisplayName(charSequence.toString()); 

          Store store = chatApplication.getStores().get(getDisplayName()); 
          store.setDelegate(contactActivity); 

          intent.putExtra(ChatActivity.INTENT_EXTRA_STORE, store.getInstance().getStringIdentifier()); 

          startActivity(intent); 
         } 
      }); 
     } catch (Exception e) { 
      AppHelper.LogCat("Contacts adapters Exception " + e.getMessage()); 
     } 
    } 

} 


@Override 
public int getItemCount() { 
    return stores.size(); 
} 

public Store getItem(int position) { 
    return stores.get(position); 
} 


public class DirectContactsViewHolder extends RecyclerView.ViewHolder { 
    @BindView(R.id.avatar) 
    ImageView userImage; 
    @BindView(R.id.display_name) 
    TextView displayName; 
    @BindView(R.id.new_content) 
    ImageView contentIndicator; 

    DirectContactsViewHolder(View itemView) { 
     super(itemView); 
     ButterKnife.bind(this, itemView); 
    } 

}} 

我很新的片段和Android Studio生成進一步迷惑我的例子。

任何幫助，高度讚賞。

Answer 1

@Victor是否想將某些數據從urler適配器傳遞給Fragment而不是Activity？如果是這樣，你應該使用回調模式。對於這樣做ü可以按如下方式創建一個封閉的接口類：

class YourFragment extends Fragment { 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    ... 

    DirectContactsAdapter adapter = new DirectContactsAdapter(...); 
    adapter.setListener(new DirectContactsAdapter.IItemClickListener() { 
     @Override 
     void onItemClicked(String identifier) { 
      //do what u want with identifier 
    }); 
}