\uc548\ub4dc\ub85c\uc774\ub4dc \uc790\ubc14 \uc571\uc5d0\uc11c \ud398\uc774\uc9d5\uc744 \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.
\n10\ub144 \uc804\ubd80\ud130 \uc788\uc5c8\ub358 \uad6c\ub2e5\ub2e4\ub9ac \uae30\ubc95\uc774\uc9c0\ub9cc, \uc544\uc9c1 \uc4f8\ub9cc\ud569\ub2c8\ub2e4.<\/p>\n
Item.java<\/p>\n
@Entity(tableName = "items")\npublic class Item {\n @PrimaryKey(autoGenerate = true)\n private int id;\n private String title;\n private String description;\n\n \/\/ Getters and Setters\n public int getId() { return id; }\n public void setId(int id) { this.id = id; }\n public String getTitle() { return title; }\n public void setTitle(String title) { this.title = title; }\n public String getDescription() { return description; }\n public void setDescription(String description) { this.description = description; }\n}<\/code><\/pre>\nDao<\/h2>\n
ItemDao.java<\/p>\n
@Dao\npublic interface ItemDao {\n @Query("SELECT * FROM items ORDER BY id LIMIT :limit OFFSET :offset")\n List<Item> getItemsWithPaging(int limit, int offset);\n\n @Query("SELECT COUNT(*) FROM items")\n int getTotalCount();\n\n @Insert\n void insert(Item item);\n}<\/code><\/pre>\nAdapter<\/h2>\n
ItemAdapter.java<\/p>\n
public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ItemViewHolder> {\n private List<Item> items = new ArrayList<>();\n\n @NonNull\n @Override\n public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {\n View view = LayoutInflater.from(parent.getContext())\n .inflate(R.layout.item_layout, parent, false);\n return new ItemViewHolder(view);\n }\n\n @Override\n public void onBindViewHolder(@NonNull ItemViewHolder holder, int position) {\n Item item = items.get(position);\n holder.titleTextView.setText(item.getTitle());\n holder.descriptionTextView.setText(item.getDescription());\n }\n\n @Override\n public int getItemCount() {\n return items.size();\n }\n\n public void addItems(List<Item> newItems) {\n int startPosition = items.size();\n items.addAll(newItems);\n notifyItemRangeInserted(startPosition, newItems.size());\n }\n\n public void clearItems() {\n items.clear();\n notifyDataSetChanged();\n }\n\n static class ItemViewHolder extends RecyclerView.ViewHolder {\n TextView titleTextView;\n TextView descriptionTextView;\n\n ItemViewHolder(View itemView) {\n super(itemView);\n titleTextView = itemView.findViewById(R.id.titleTextView);\n descriptionTextView = itemView.findViewById(R.id.descriptionTextView);\n }\n }\n}<\/code><\/pre>\nMainActivity<\/h2>\n
MainActivity.java<\/p>\n
public class MainActivity extends AppCompatActivity {\n private ItemAdapter adapter;\n private ItemDao itemDao;\n private static final int PAGE_SIZE = 20;\n private int currentPage = 0;\n private boolean isLoading = false;\n private boolean isLastPage = false;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n RecyclerView recyclerView = findViewById(R.id.recyclerView);\n adapter = new ItemAdapter();\n recyclerView.setAdapter(adapter);\n LinearLayoutManager layoutManager = new LinearLayoutManager(this);\n recyclerView.setLayoutManager(layoutManager);\n\n \/\/ Room \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucd08\uae30\ud654\n AppDatabase db = Room.databaseBuilder(getApplicationContext(),\n AppDatabase.class, "database-name").build();\n itemDao = db.itemDao();\n\n \/\/ \uc2a4\ud06c\ub864 \ub9ac\uc2a4\ub108 \uc124\uc815\n recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {\n @Override\n public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {\n super.onScrolled(recyclerView, dx, dy);\n\n int visibleItemCount = layoutManager.getChildCount();\n int totalItemCount = layoutManager.getItemCount();\n int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();\n\n if (!isLoading && !isLastPage) {\n if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount\n && firstVisibleItemPosition >= 0) {\n loadMoreItems();\n }\n }\n }\n });\n\n \/\/ \ucd08\uae30 \ub370\uc774\ud130 \ub85c\ub4dc\n loadMoreItems();\n }\n\n private void loadMoreItems() {\n isLoading = true;\n\n new Thread(() -> {\n int offset = currentPage * PAGE_SIZE;\n List<Item> newItems = itemDao.getItemsWithPaging(PAGE_SIZE, offset);\n int totalCount = itemDao.getTotalCount();\n\n runOnUiThread(() -> {\n if (newItems.size() < PAGE_SIZE) {\n isLastPage = true;\n }\n adapter.addItems(newItems);\n currentPage++;\n isLoading = false;\n });\n }).start();\n }\n}<\/code><\/pre>\nxml<\/h2>\n
activity_main.xml<\/p>\n
<?xml version="1.0" encoding="utf-8"?>\n<androidx.constraintlayout.widget.ConstraintLayout \n xmlns:android="http:\/\/schemas.android.com\/apk\/res\/android"\n android:layout_width="match_parent"\n android:layout_height="match_parent">\n\n <androidx.recyclerview.widget.RecyclerView\n android:id="@+id\/recyclerView"\n android:layout_width="match_parent"\n android:layout_height="match_parent" \/>\n\n<\/androidx.constraintlayout.widget.ConstraintLayout><\/code><\/pre>\nitem_layout.xml<\/p>\n
<?xml version="1.0" encoding="utf-8"?>\n<LinearLayout\n xmlns:android="http:\/\/schemas.android.com\/apk\/res\/android"\n android:layout_width="match_parent"\n android:layout_height="wrap_content"\n android:orientation="vertical"\n android:padding="16dp">\n\n <TextView\n android:id="@+id\/titleTextView"\n android:layout_width="match_parent"\n android:layout_height="wrap_content"\n android:textSize="16sp"\n android:textStyle="bold" \/>\n\n <TextView\n android:id="@+id\/descriptionTextView"\n android:layout_width="match_parent"\n android:layout_height="wrap_content"\n android:layout_marginTop="8dp" \/>\n\n<\/LinearLayout><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\uc548\ub4dc\ub85c\uc774\ub4dc – \uc790\ubc14 \ud398\uc774\uc9d5 \uad6c\ud604 \uc548\ub4dc\ub85c\uc774\ub4dc \uc790\ubc14 \uc571\uc5d0\uc11c \ud398\uc774\uc9d5\uc744 \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4. 10\ub144 \uc804\ubd80\ud130 \uc788\uc5c8\ub358 \uad6c\ub2e5\ub2e4\ub9ac \uae30\ubc95\uc774\uc9c0\ub9cc, \uc544\uc9c1 \uc4f8\ub9cc\ud569\ub2c8\ub2e4. Entity Item.java @Entity(tableName = "items") public class Item { @PrimaryKey(autoGenerate = true) private int id; private String title; private String description; \/\/ Getters and Setters public int getId() { return id; } public void setId(int id)\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-9609","post","type-post","status-publish","format-standard","hentry","category-android"],"_links":{"self":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9609","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9609"}],"version-history":[{"count":1,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9609\/revisions"}],"predecessor-version":[{"id":9610,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9609\/revisions\/9610"}],"wp:attachment":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9609"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9609"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}