Comment charger plus quand j'utilise RecyclerView et Retrofit?

Question

Je veux développer une application Android pour un site Web. Je lis les messages du site Web de json et montre son dans RecyclerView tous les 10 messages et lorsque l'utilisateur de défilement sur RecyclerView afficher plus de 10 messages et aller à la fin! Je suis amateur et j'écris ci-dessous codes, mais je ne sais pas pour lire plus de données lors du défilement pour mettre fin et montrer mes données! (Je veux montrer n'importe quel 10 messages dans toutes les pages). lien API: API_LINK

public NewAdapter(List<Doc> docs, int rowLayout, Context context) { 
    this.docs = docs; 
    this.rowLayout = rowLayout; 
    this.context = context; 
} 

@Override 
public NewViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    v = LayoutInflater.from(parent.getContext()).inflate(rowLayout, parent, false); 
    return new NewViewHolder(v); 
} 

@Override 
public void onBindViewHolder(final NewViewHolder holder, final int position) { 
    doc = docs.get(position); 
    holder.tvTitle.setText(doc.getHeadline().getMain()); 
    holder.tvDate.setText(doc.getPubDate()); 
    holder.tvDescription.setText(doc.getSnippet()); 
    if (docs.get(position).getMultimedia().size() > 0) { 
     Glide.with(context).load(url + doc.getMultimedia().get(0).getUrl()) 
       .thumbnail(0.5f) 
       .placeholder(R.drawable.ic_close_black_24dp) 
       .diskCacheStrategy(DiskCacheStrategy.ALL) 
       .error(R.drawable.ic_close_black_24dp) 
       .into(holder.ivPoster); 
    } 
    holder.newLayout.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent intent = new Intent(context, WebViewActivity.class); 
      intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 

      intent.putExtra("web_url", docs.get(position).getWebUrl());  
      context.startActivity(intent); 
     } 
    }); 
} 

@Override 
public int getItemCount() { 
    return docs == null ? 0 : docs.size(); 
} 

public class NewViewHolder extends RecyclerView.ViewHolder { 
    LinearLayout newLayout; 
    TextView tvTitle; 
    TextView tvDescription; 
    TextView tvDate; 
    ImageView ivPoster; 

    public NewViewHolder(View itemView) { 
     super(itemView); 
     newLayout = (LinearLayout) itemView.findViewById(R.id.new_layout); 
     tvDate = (TextView) itemView.findViewById(R.id.tvDate); 
     tvTitle = (TextView) itemView.findViewById(R.id.tvTitle); 
     tvDescription = (TextView) itemView.findViewById(R.id.tvDescription); 
     ivPoster = (ImageView) itemView.findViewById(R.id.ivPoster); 
    } 
} 

MainActivity

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    newDocs = (List<Doc>) getIntent().getSerializableExtra("Doc"); 
    change = getIntent().getBooleanExtra("change", false); 
    init(); 
    setToolbar(); 
    setContent(); 

    //Xét điều kiện thay đổi 
    if (change) { 
     if (newDocs.size() > 0) { 
      Toast.makeText(MainActivity.this, "Data", Toast.LENGTH_SHORT).show(); 
     } else { 
      Toast.makeText(MainActivity.this, "Empty", Toast.LENGTH_SHORT).show(); 
     } 
     setRecycleView(newDocs); 
    } 
    getData(); 


} 

@Override 
public void onBackPressed() { 
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    if (drawer.isDrawerOpen(GravityCompat.START)) { 
     drawer.closeDrawer(GravityCompat.START); 
    } else { 
     super.onBackPressed(); 
    } 
} 

private void setToolbar() { 
    setSupportActionBar(toolbar); 
} 

//Function xác nhận dữ liệu trả về id 
private void init() { 
    toolbar = (Toolbar) findViewById(R.id.toolbar); 
    mRecyclerView = (RecyclerView) findViewById(R.id.new_recycler_view); 
    refreshLayout = (SwipeRefreshLayout) findViewById(R.id.srlMain); 
    drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    navigationView = (NavigationView) findViewById(R.id.nav_view); 
} 


private void setContent() { 

    toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    drawer.setDrawerListener(toggle); 
    toggle.syncState(); 
    navigationView.setNavigationItemSelectedListener(this); 
    refreshLayout.setOnRefreshListener(this); 

    //Set Recyclerview 
    mRecyclerView.setNestedScrollingEnabled(false); 
    final LinearLayoutManager mLayoutManager; 
    mLayoutManager = new LinearLayoutManager(this); 
    mRecyclerView.setLayoutManager(mLayoutManager); 
    mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3)); 

} 

    //Function lấy dữ liệu RecyclerView 

private void setRecycleView(List<Doc> list) { 
    newAdapter = new NewAdapter(list, R.layout.new_listitems, MainActivity.this); 
    newAdapter.notifyDataSetChanged(); 
    mRecyclerView.setAdapter(newAdapter); 

} 

//Function nhận dữ liệu 
private void getData() { 
    APIinterface apiSevice = APIClient.getClient().create(APIinterface.class); 
    Call<Resonpe> call = apiSevice.getHotNew(API_KEY); 
    call.enqueue(new Callback<Resonpe>() { 
     @Override 
     public void onResponse(Call<Resonpe> call, Response<Resonpe> response) { 
      if (response.isSuccessful()) { 
       docs = response.body().getNewResponse().getDocs(); 
       if (!change) { 
        setRecycleView(docs); 
       } 
      } else { 
       Toast.makeText(MainActivity.this, "Error", Toast.LENGTH_SHORT).show(); 
      } 
     } 

     @Override 
     public void onFailure(Call<Resonpe> call, Throwable t) { 
      Toast.makeText(MainActivity.this, "Internet is not connected", Toast.LENGTH_SHORT).show(); 
     } 
    }); 
} 

//Function tạo phần OptionMenu 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.main, menu); 
    MenuItem searchItem = menu.findItem(R.id.action_search); 
    final SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem); 

    return super.onCreateOptionsMenu(menu); 
} 

//Function xử lý sự kiên click items của Option 
@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

@Override 
public void onRefresh() { 
    new Handler().postDelayed(new Runnable() { 
     @Override 
     public void run() { 
      refreshLayout.setRefreshing(false); 
      if (change) { 
       setRecycleView(newDocs); 
      } else { 
       setRecycleView(docs); 
      } 
     } 
    }, 2500); 

} 

// Function xử lý sự kiên click items của NavigationView 
@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 
    newDocs = new ArrayList<>(); 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 
    if (id == R.id.nav_camera) { 
     for (Doc doc : docs) { 
      if (doc.getNewDesk().equals("Sport")) { 
       newDocs.add(doc); 
      } 
     } 
    } else if (id == R.id.nav_gallery) { 
     for (Doc doc : docs) { 
      if (doc.getNewDesk().equals("Fashion")) { 
       newDocs.add(doc); 
      } 
     } 
    } else if (id == R.id.nav_slideshow) { 
     for (Doc doc : docs) { 
      if (doc.getNewDesk().equals("Arts")) { 
       newDocs.add(doc); 
      } 
     } 
    } else if (id == R.id.nav_manage) { 
     for (Doc doc : docs) { 
      if (doc.getNewDesk().equals("None")) { 
       newDocs.add(doc); 
      } 
     } 
    } 

    Intent intent = new Intent(this, MainActivity.class); 
    intent.putExtra("Doc", (Serializable) newDocs); 
    intent.putExtra("change", true); 
    startActivity(intent); 
    finish(); 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    drawer.closeDrawer(GravityCompat.START); 
    return true; 
} 

Answer 1

vous pouvez consulter ce tutoriel chemin de code. sans utiliser de bibliothèque externe. Juste simplement une classe. Et vous pouvez définir combien d'éléments vous voulez dans une page et au centre de la page, c'est-à-dire à 5-6 éléments, vous pouvez charger plus de données et notifierDatasetChange à l'adaptateur de vue recycleur. S'il vous plaît, passez par ce lien.

https://github.com/codepath/android_guides/wiki/Endless-Scrolling-with-AdapterViews-and-RecyclerView