要实现Android Room关键字搜索列表,你可以按照以下步骤进行操作:
implementation 'androidx.room:room-runtime:2.4.0'
annotationProcessor 'androidx.room:room-compiler:2.4.0'
@Entity(tableName = "keyword")
public class Keyword {
@PrimaryKey(autoGenerate = true)
public int id;
@ColumnInfo(name = "keyword")
public String keyword;
}
@Dao
public interface KeywordDao {
@Query("SELECT * FROM keyword WHERE keyword LIKE '%' || :search || '%'")
List searchKeywords(String search);
@Insert
void insertKeyword(Keyword keyword);
}
@Database(entities = {Keyword.class}, version = 1)
public abstract class AppDatabase extends RoomDatabase {
public abstract KeywordDao keywordDao();
private static AppDatabase instance;
public static synchronized AppDatabase getInstance(Context context) {
if (instance == null) {
instance = Room.databaseBuilder(context.getApplicationContext(),
AppDatabase.class, "database-name")
.build();
}
return instance;
}
}
AppDatabase db = AppDatabase.getInstance(getApplicationContext());
KeywordDao keywordDao = db.keywordDao();
List searchResults = keywordDao.searchKeywords("your search keyword");
// 处理搜索结果
Keyword keyword = new Keyword();
keyword.keyword = "your keyword";
keywordDao.insertKeyword(keyword);
这样,你就可以使用Android Room实现关键字搜索列表了。请根据自己的需求进行适当的修改和扩展。