关键词：
【中文标题】如何在基于 SQLite 的 recyclerview 中实现 searchview？ - 安卓【英文标题】：How to implement searchview in recyclerview which based on SQLite? - Android 【发布时间】：2021-11-05 06:45:11 【问题描述】：我正在构建 Android 应用程序，它将患者详细信息存储在 SQLite 数据库中，并在 recyclerview 中显示这些数据，现在我想为我的 recyclerview 添加 searchview，请帮助我实现这个。
我在 this youtube 教程系列 - https://youtube.com/playlist?list=PLSrm9z4zp4mGK0g_0_jxYGgg3os9tqRUQ 的帮助下从事这个项目
这是我的 MainActivity 类
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity
RecyclerView recyclerView;
FloatingActionButton add_button;
MyDatabaseHelper myDB;
ArrayList<String> _id, name, disease, medicine, mobile, address, day, month, year;
CustomAdapter customAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recyclerView);
add_button = findViewById(R.id.add_button);
add_button.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Intent intent = new Intent(MainActivity.this, AddActivity.class);
startActivity(intent);
);
myDB = new MyDatabaseHelper(MainActivity.this);
_id = new ArrayList<>();
name = new ArrayList<>();
disease = new ArrayList<>();
medicine = new ArrayList<>();
mobile = new ArrayList<>();
address = new ArrayList<>();
day = new ArrayList<>();
month = new ArrayList<>();
year = new ArrayList<>();
storeDataInArrays();
customAdapter = new CustomAdapter(MainActivity.this, _id, name, disease, medicine, mobile, address, day, month, year);
recyclerView.setAdapter(customAdapter);
recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
void storeDataInArrays()
Cursor cursor = myDB.readAllData();
if(cursor.getCount() == 0)
Toast.makeText(this, "No data.", Toast.LENGTH_SHORT).show();
else
while (cursor.moveToNext())
_id.add(cursor.getString(0));
name.add(cursor.getString(1));
disease.add(cursor.getString(2));
medicine.add(cursor.getString(3));
mobile.add(String.valueOf(cursor.getLong(4)));
address.add(cursor.getString(5));
day.add(cursor.getString(6));
month.add(cursor.getString(7));
year.add(cursor.getString(8));
这是我的 AddActivity 类
package com.example.myclinic;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class AddActivity extends AppCompatActivity
EditText name_input, disease_input, medicine_input, mobile_input, address_input, day_input, month_input, year_input;
Button add_button;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add);
name_input = findViewById(R.id.name_input);
disease_input = findViewById(R.id.disease_input);
medicine_input = findViewById(R.id.medicine_input);
mobile_input = findViewById(R.id.mobile_input);
address_input = findViewById(R.id.address_input);
day_input = findViewById(R.id.day_input);
month_input = findViewById(R.id.month_input);
year_input = findViewById(R.id.year_input);
add_button = findViewById(R.id.add_button);
Date date = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
String strDate = formatter.format(date);
day_input.setText(strDate.substring(0,2));
month_input.setText(strDate.substring(3,5));
year_input.setText(strDate.substring(6,10));
add_button.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (TextUtils.isEmpty(name_input.getText().toString()) || TextUtils.isEmpty(disease_input.getText().toString()))
name_input.setHint("Patient Name* (Mandatory)");
disease_input.setHint("Disease* (Mandatory)");
Toast.makeText(AddActivity.this,
"Failed!", Toast.LENGTH_SHORT).show();
else
try
MyDatabaseHelper myDB = new MyDatabaseHelper(AddActivity.this);
myDB.addPatient(name_input.getText().toString().trim(),
disease_input.getText().toString().trim(),
medicine_input.getText().toString().trim(),
Long.parseLong("0" + mobile_input.getText().toString().trim()),
address_input.getText().toString().trim(),
Integer.parseInt(day_input.getText().toString().trim()),
Integer.parseInt(month_input.getText().toString().trim()),
Integer.parseInt(year_input.getText().toString().trim()));
catch (Exception e)
Toast.makeText(AddActivity.this, "Failed!", Toast.LENGTH_SHORT).show();
);
这里是 MyDatabaseHelper 类
package com.example.myclinic;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.widget.Toast;
import androidx.annotation.Nullable;
import com.google.android.material.shape.ShapeAppearanceModel;
public class MyDatabaseHelper extends SQLiteOpenHelper
private Context context;
private static final String DATABASE_NAME = "PatientList.db";
private static final int DATABASE_VERSION = 1;
private static final String TABLE_NAME = "patients";
private static final String COLUMN_ID = "_id";
private static final String COLUMN_NAME = "name";
private static final String COLUMN_DISEASE = "disease";
private static final String COLUMN_MEDICINES = "medicines";
private static final String COLUMN_MOBILE = "mobile";
private static final String COLUMN_ADDRESS = "address";
private static final String COLUMN_DAY = "day";
private static final String COLUMN_MONTH = "month";
private static final String COLUMN_YEAR = "year";
public MyDatabaseHelper(@Nullable Context context)
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.context = context;
@Override
public void onCreate(SQLiteDatabase db)
String query =
"CREATE TABLE " + TABLE_NAME +
" (" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_NAME + " TEXT, " +
COLUMN_DISEASE + " TEXT, " +
COLUMN_MEDICINES + " TEXT, " +
COLUMN_MOBILE + " INTEGER, " +
COLUMN_ADDRESS + " TEXT, " +
COLUMN_DAY + " INTEGER, " +
COLUMN_MONTH + " INTEGER, " +
COLUMN_YEAR + " INTEGER);";
db.execSQL(query);
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1)
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
void addPatient(String pname, String pdisease, String pmedicines, Long pmobile, String paddress, int pday, int pmonth, int pyear)
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(COLUMN_NAME, pname);
cv.put(COLUMN_DISEASE, pdisease);
cv.put(COLUMN_MEDICINES, pmedicines);
cv.put(COLUMN_MOBILE, pmobile.longValue());
cv.put(COLUMN_ADDRESS, paddress);
cv.put(COLUMN_DAY, pday);
cv.put(COLUMN_MONTH, pmonth);
cv.put(COLUMN_YEAR, pyear);
long result = db.insert(TABLE_NAME, null, cv);
if(result == -1)
Toast.makeText(context, "Failed!", Toast.LENGTH_SHORT).show();
else
Toast.makeText(context, "Added Successfully...", Toast.LENGTH_SHORT).show();
Cursor readAllData()
String query = "SELECT * FROM " + TABLE_NAME;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = null;
if(db != null) cursor = db.rawQuery(query, null);
return cursor;
这里是 CustomAdapter 类
package com.example.myclinic;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.security.PrivateKey;
import java.util.ArrayList;
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder>
private Context context;
private ArrayList _id, name, disease, medicine, mobile, address, day, month, year;
CustomAdapter(Context context, ArrayList _id, ArrayList name, ArrayList disease,
ArrayList medicine, ArrayList mobile, ArrayList address, ArrayList day, ArrayList month, ArrayList year)
this.context = context;
this._id = _id;
this.name = name;
this.disease = disease;
this.medicine = medicine;
this.mobile = mobile;
this.address = address;
this.day = day;
this.month = month;
this.year = year;
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.my_row, parent, false);
return new MyViewHolder(view);
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position)
holder.id_txt.setText(String.valueOf(_id.get(position)));
holder.name_txt.setText(String.valueOf(name.get(position)));
holder.disease_txt.setText(String.valueOf(disease.get(position)));
holder.medicine_txt.setText(String.valueOf(medicine.get(position)));
holder.mobile_txt.setText(String.valueOf(mobile.get(position)));
holder.address_txt.setText(String.valueOf(address.get(position)));
holder.day_txt.setText(String.valueOf(day.get(position)));
holder.month_txt.setText(String.valueOf(month.get(position)));
holder.year_txt.setText(String.valueOf(year.get(position)));
@Override
public int getItemCount()
return _id.size();
public class MyViewHolder extends RecyclerView.ViewHolder
TextView id_txt, name_txt, disease_txt, medicine_txt, mobile_txt, address_txt, day_txt, month_txt, year_txt;
public MyViewHolder(@NonNull View itemView)
super(itemView);
id_txt = itemView.findViewById(R.id.id_txt);
name_txt = itemView.findViewById(R.id.name_txt);
disease_txt = itemView.findViewById(R.id.disease_txt);
medicine_txt = itemView.findViewById(R.id.medicine_txt);
mobile_txt = itemView.findViewById(R.id.mobile_txt);
address_txt = itemView.findViewById(R.id.address_txt);
day_txt = itemView.findViewById(R.id.day_txt);
month_txt = itemView.findViewById(R.id.month_txt);
year_txt = itemView.findViewById(R.id.year_txt);
【问题讨论】：
我认为将数据存储在数组中并不明智。只需使用包含所有信息的对象的单个数组即可。您可以使用 ORM（对象关系映射）来做到这一点。 感谢回复，其实我是java编程的初学者。你的评论是否意味着如果我想解决这个问题，那么我需要创建一个包含我所有数据的类，然后进行处理，这是你建议我的吗？ 是的，如果是表/数据库中的一行数据，最好的表示是对象。您的解决方案基于该表的列，这需要大量自定义代码，因为它不是常见的用例。这里有一些库可能有助于处理行dzone.com/articles/… 谢谢先生，现在我实现了搜索功能，因为你的帮助，我真的很感激。现在我将发布对其他人有帮助的解决方案。 【参考方案1】：为了在这个项目中实现搜索功能，正如@thinkgruen 建议的那样，我需要处理单个数组列表而不是多个数组列表，这就是为什么我创建了包含所有数据的单独类并制作了该类的数组列表，并实现了过滤器方法那个数组列表。
之后我浏览了这个 youtube 教程 - https://www.youtube.com/watch?v=CTvzoVtKoJ8
我在这里发布更改的代码，我将旧代码作为注释并将更改的代码标记为 //U 。因为你可以清楚地看到我做了什么改变。
首先这里是新类 - PatientList
package com.example.myclinic;
public class PatientList
private int _id;
private String name;
private String disease;
private String medicine;
private long mobile;
private String address;
private int day;
private int month;
private int year;
private String serialid;
public int getid()
return _id;
public void setid(int _id)
this._id = _id;
public String getname()
return name;
public void setname (String name)
this.name = name;
public String getdisease()
return disease;
public void setdisease (String disease)
this.disease = disease;
public String getmedicine()
return medicine;
public void setmedicine (String medicine)
this.medicine = medicine;
public long getmobile()
return mobile;
public void setmobile (long mobile)
this.mobile = mobile;
public String getaddress()
return address;
public void setaddress (String address)
this.address = address;
public int getday()
return day;
public void setday(int day)
this.day = day;
public int getmonth()
return month;
public void setmonth(int month)
this.month = month;
public int getyear()
return year;
public void setyear(int year)
this.year = year;
public String getserialid()
return serialid;
public void setserialid (String serialid)
this.serialid = serialid;
//constructor
public PatientList(int _id, String name, String disease, String medicine, long mobile, String address, int day, int month, int year, String serialid)
this._id = _id;
this.name = name;
this.disease = disease;
this.medicine = medicine;
this.mobile = mobile;
this.address = address;
this.day = day;
this.month = month;
this.year = year;
this.serialid = serialid;
之后，在 Class - CustomAdapter
package com.example.myclinic;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
//U
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> implements Filterable
private Context context;
// private ArrayList _id, name, disease, medicine, mobile, address, day, month, year, serialid;
private List<PatientList> patientList = new ArrayList<>(); //U
private List<PatientList> patientListAll = new ArrayList<>();
CustomAdapter(Context context,/* ArrayList _id, ArrayList name, ArrayList disease,
ArrayList medicine, ArrayList mobile, ArrayList address, ArrayList day, ArrayList month, ArrayList year, ArrayList serialid, */
ArrayList<PatientList> patientList)
this.context = context;
/*
this._id = _id;
this.name = name;
this.disease = disease;
this.medicine = medicine;
this.mobile = mobile;
this.address = address;
this.day = day;
this.month = month;
this.year = year;
this.serialid = serialid;
*/
this.patientList = patientList; //U
this.patientListAll = new ArrayList<>(patientList);
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.my_row, parent, false);
return new MyViewHolder(view);
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position)
/*
holder.id_txt.setText(String.valueOf(_id.get(position)));
holder.name_txt.setText(String.valueOf(name.get(position)));
holder.disease_txt.setText(String.valueOf(disease.get(position)));
holder.medicine_txt.setText(String.valueOf(medicine.get(position)));
holder.mobile_txt.setText(String.valueOf(mobile.get(position)));
holder.address_txt.setText(String.valueOf(address.get(position)));
holder.day_txt.setText(String.valueOf(day.get(position)));
holder.month_txt.setText(String.valueOf(month.get(position)));
holder.year_txt.setText(String.valueOf(year.get(position)));
holder.serialid_txt.setText(String.valueOf(serialid.get(position)));
*/
PatientList plist = patientList.get(position); //U
holder.id_txt.setText(String.valueOf(plist.getid()));
holder.name_txt.setText(String.valueOf(plist.getname()));
holder.disease_txt.setText(String.valueOf(plist.getdisease()));
holder.medicine_txt.setText(String.valueOf(plist.getmedicine()));
holder.mobile_txt.setText(String.valueOf(plist.getmobile()));
holder.address_txt.setText(String.valueOf(plist.getaddress()));
holder.day_txt.setText(String.valueOf(plist.getday()));
holder.month_txt.setText(String.valueOf(plist.getmonth()));
holder.year_txt.setText(String.valueOf(plist.getyear()));
holder.serialid_txt.setText(String.valueOf(plist.getserialid()));
@Override
public int getItemCount()
return patientList.size();
//U
@Override
public Filter getFilter()
return filter;
//U
Filter filter = new Filter()
@Override
protected FilterResults performFiltering(CharSequence constaint)
List<PatientList> filteredList = new ArrayList<>();
if (constaint.toString().isEmpty())
filteredList.addAll(patientListAll);
else
for (PatientList patient : patientListAll)
if (patient.getname().toLowerCase().contains(constaint.toString().toLowerCase())
|| patient.getserialid().toLowerCase().contains(constaint.toString().toLowerCase())
|| patient.getaddress().toLowerCase().contains(constaint.toString().toLowerCase()))
filteredList.add(patient);
FilterResults filterResults = new FilterResults();
filterResults.values = filteredList;
return filterResults;
@Override
protected void publishResults(CharSequence constraint, FilterResults filterResults)
patientList.clear();
patientList.addAll((Collection<? extends PatientList>) filterResults.values);
notifyDataSetChanged();
;
public class MyViewHolder extends RecyclerView.ViewHolder
TextView id_txt, name_txt, disease_txt, medicine_txt, mobile_txt, address_txt, day_txt, month_txt, year_txt, serialid_txt;
public MyViewHolder(@NonNull View itemView)
super(itemView);
id_txt = itemView.findViewById(R.id.id_txt);
name_txt = itemView.findViewById(R.id.name_txt);
disease_txt = itemView.findViewById(R.id.disease_txt);
medicine_txt = itemView.findViewById(R.id.medicine_txt);
mobile_txt = itemView.findViewById(R.id.mobile_txt);
address_txt = itemView.findViewById(R.id.address_txt);
day_txt = itemView.findViewById(R.id.day_txt);
month_txt = itemView.findViewById(R.id.month_txt);
year_txt = itemView.findViewById(R.id.year_txt);
serialid_txt = itemView.findViewById(R.id.serialid_txt);
类数据库助手
package com.example.myclinic;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.widget.Toast;
import androidx.annotation.Nullable;
import com.google.android.material.shape.ShapeAppearanceModel;
public class MyDatabaseHelper extends SQLiteOpenHelper
private Context context;
private static final String DATABASE_NAME = "PatientList.db";
private static final int DATABASE_VERSION = 1;
private static final String TABLE_NAME = "patients";
private static final String COLUMN_ID = "_id";
private static final String COLUMN_NAME = "name";
private static final String COLUMN_DISEASE = "disease";
private static final String COLUMN_MEDICINES = "medicines";
private static final String COLUMN_MOBILE = "mobile";
private static final String COLUMN_ADDRESS = "address";
private static final String COLUMN_DAY = "day";
private static final String COLUMN_MONTH = "month";
private static final String COLUMN_YEAR = "year";
private static final String COLUMN_SERIALID = "serialid";
public MyDatabaseHelper(@Nullable Context context)
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.context = context;
@Override
public void onCreate(SQLiteDatabase db)
String query =
"CREATE TABLE " + TABLE_NAME +
" (" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_NAME + " TEXT, " +
COLUMN_DISEASE + " TEXT, " +
COLUMN_MEDICINES + " TEXT, " +
COLUMN_MOBILE + " INTEGER, " +
COLUMN_ADDRESS + " TEXT, " +
COLUMN_DAY + " INTEGER, " +
COLUMN_MONTH + " INTEGER, " +
COLUMN_YEAR + " INTEGER, " +
COLUMN_SERIALID + " TEXT);";
db.execSQL(query);
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1)
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
void addPatient(String pname, String pdisease, String pmedicines, Long pmobile, String paddress, int pday, int pmonth, int pyear, String pserialid)
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(COLUMN_NAME, pname);
cv.put(COLUMN_DISEASE, pdisease);
cv.put(COLUMN_MEDICINES, pmedicines);
cv.put(COLUMN_MOBILE, pmobile.longValue());
cv.put(COLUMN_ADDRESS, paddress);
cv.put(COLUMN_DAY, pday);
cv.put(COLUMN_MONTH, pmonth);
cv.put(COLUMN_YEAR, pyear);
cv.put(COLUMN_SERIALID, pserialid);
long result = db.insert(TABLE_NAME, null, cv);
if(result == -1)
Toast.makeText(context, "Failed!", Toast.LENGTH_SHORT).show();
else
Toast.makeText(context, "Added Successfully...", Toast.LENGTH_SHORT).show();
Cursor readAllData()
String query = "SELECT * FROM " + TABLE_NAME;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = null;
if(db != null) cursor = db.rawQuery(query, null);
return cursor;
MainActivity.Java 中的最终更改
package com.example.myclinic;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.appcompat.widget.SearchView;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity
RecyclerView recyclerView;
FloatingActionButton add_button;
MyDatabaseHelper myDB;
// ArrayList<String> _id, name, disease, medicine, mobile, address, day, month, year, serialid;
ArrayList<PatientList> patientList = new ArrayList<>(); //U
CustomAdapter customAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recyclerView);
add_button = findViewById(R.id.add_button);
add_button.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Intent intent = new Intent(MainActivity.this, AddActivity.class);
startActivity(intent);
);
myDB = new MyDatabaseHelper(MainActivity.this);
/*
_id = new ArrayList<>();
name = new ArrayList<>();
disease = new ArrayList<>();
medicine = new ArrayList<>();
mobile = new ArrayList<>();
address = new ArrayList<>();
day = new ArrayList<>();
month = new ArrayList<>();
year = new ArrayList<>();
serialid = new ArrayList<>();
*/
storeDataInArray();
customAdapter = new CustomAdapter(MainActivity.this, patientList);
recyclerView.setAdapter(customAdapter);
recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
/*
void storeDataInArrays()
Cursor cursor = myDB.readAllData();
if(cursor.getCount() == 0)
Toast.makeText(this, "No data.", Toast.LENGTH_SHORT).show();
else
while (cursor.moveToNext())
_id.add(cursor.getString(0));
name.add(cursor.getString(1));
disease.add(cursor.getString(2));
medicine.add(cursor.getString(3));
mobile.add(String.valueOf(cursor.getLong(4)));
address.add(cursor.getString(5));
day.add(cursor.getString(6));
month.add(cursor.getString(7));
year.add(cursor.getString(8));
serialid.add(cursor.getString(9));
*/
void storeDataInArray() //U
Cursor cursor = myDB.readAllData();
if(cursor.getCount() == 0)
Toast.makeText(this, "No data.", Toast.LENGTH_SHORT).show();
else
while (cursor.moveToNext())
patientList.add(new PatientList(cursor.getInt(0),
cursor.getString(1),
cursor.getString(2),
cursor.getString(3),
cursor.getLong(4),
cursor.getString(5),
cursor.getInt(6),
cursor.getInt(7),
cursor.getInt(8),
cursor.getString(9)));
@Override //U
public boolean onCreateOptionsMenu(Menu menu)
getMenuInflater().inflate(R.menu.mainmenu, menu);
MenuItem item = menu.findItem(R.id.action_search);
SearchView searchView = (SearchView)item.getActionView();
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener()
@Override
public boolean onQueryTextSubmit(String query)
return false;
@Override
public boolean onQueryTextChange(String newText)
customAdapter.getFilter().filter(newText);
return false;
);
return super.onCreateOptionsMenu(menu);
AddActivity 没有任何变化。 希望对您有所帮助。
【讨论】：
如何使用 sequelize 基于 sqlite3 中的“日期”列进行查询？
】如何使用sequelize基于sqlite3中的“日期”列进行查询？【英文标题】：Howtodoquerybasedon"date"columninsqlite3usingsequelize?【发布时间】：2014-06-1716:27:06【问题描述】：我正在使用带有sqlite3的Sequelize，但在查询基于“日期”类型... 查看详情
如何在sqlite中对表中的行进行排名？
】如何在sqlite中对表中的行进行排名？【英文标题】：Howtorankrowsinatableinsqlite?【发布时间】：2017-12-2313:28:27【问题描述】：如何创建一个基于两个或三个键对表的信息进行排序的列？例如，在此表中，排名变量基于部门和名称：... 查看详情
如何在 sqlite 表中找到间隙？
】如何在sqlite表中找到间隙？【英文标题】：HowdoIfindgapinsqlitetable?【发布时间】：2015-07-2314:08:02【问题描述】：我有一个以毫秒为单位的时间戳作为主键的sqlite表，每行应该彼此相隔1秒或1000秒。有时我的数据记录器会熄灭，而... 查看详情
如何在搜索栏中按名字和姓氏排序 - Sqlite
】如何在搜索栏中按名字和姓氏排序-Sqlite【英文标题】：Howtosortbyfirstnameandlastnameinsearchbar-Sqlite【发布时间】：2013-05-2201:08:41【问题描述】：我有一个应该替换Android原生联系人的Android应用程序。我想为用户添加基于字符约束搜... 查看详情
如何从 SQLite 中的表中选择最新的 100 个不同条目？
】如何从SQLite中的表中选择最新的100个不同条目？【英文标题】：Howtoselectthelatest100distinctentriesfromatableinSQLite?【发布时间】：2019-11-2013:29:16【问题描述】：尽管看起来很简单，但我一直在努力解决以下任务：从SQLite的表中选择最... 查看详情
如何将::序列化为 sqlite::blob？
】如何将::序列化为sqlite::blob？【英文标题】：Howtoboost::serializeintoasqlite::blob?【发布时间】：2013-12-0520:21:23【问题描述】：我正在从事一个需要多种程序能力的科学项目。在四处寻找可用工具后，我决定使用Boost库，它为我提供... 查看详情
如何将文本字段中输入的数据与 SQLite 数据库的列匹配
】如何将文本字段中输入的数据与SQLite数据库的列匹配【英文标题】：HowtomatchdataenteredintextfieldwiththecolumnsofSQLitedatabase【发布时间】：2011-07-3013:51:48【问题描述】：我正在创建一个基于SQLite的应用程序。我的数据库有一个名为logi... 查看详情
iCloud 中基于 SQLite 的核心数据中的有序关系
】iCloud中基于SQLite的核心数据中的有序关系【英文标题】：OrderedrelationshipsinSQLite-basedCoreDatainiCloud【发布时间】：2013-03-1111:28:18【问题描述】：我有一个iOS6.1应用程序，它使用具有一些有序关系的CoreData模型。它的下一个版本应... 查看详情
如何在tableview中显示sqlite3中的表中的信息
参考技术A 最近工作中用到了QT、sqlite3，这里记录当中用到的一些知识点：具体就是在QT的widget中用tableview显示sqlite数据库表中的内容。 假设有数据库文件test.db,有表table(idinteger,namenvarchar(20),ageinteger)，且有数条数据……... 查看详情
[转]mbtiles离线地图演示-基于googlemapsjavascriptapiv3+sqlite
MBTiles是一种地图瓦片存储的数据规范，它使用SQLite数据库，可大大提高海量地图瓦片的读取速度，比通过瓦片文件方式的读取要快很多，适用于Android、IPhone等智能手机的离线地图存储。详情请参考：MBTiles移动存储简介。 &nb... 查看详情
在同一个数据库上同时使用 core-data 和基于 sqlite c 的 api
】在同一个数据库上同时使用core-data和基于sqlitec的api【英文标题】：Usecore-dataandsqlitecbasedapisimultaneouslyonsamedb【发布时间】：2015-10-0518:56:49【问题描述】：AFAIKCoreData可以配置为在持久存储中使用sqlite。因此core-data不提供使用SQL进... 查看详情
基于 XSD 数据集创建 SQLite 数据库
】基于XSD数据集创建SQLite数据库【英文标题】：CreateaSQLitedatabasebasedonanXSDDataSet【发布时间】：2010-09-0505:47:42【问题描述】：有人知道是否有一种方法可以基于XSDDataSet创建SQLite数据库吗？过去，我只使用了一个基本的SQLite管理器... 查看详情
如何制作基于导航的应用程序？
】如何制作基于导航的应用程序？【英文标题】：HowtoImakeanavigation-basedapp?【发布时间】：2010-05-1910:53:44【问题描述】：是的，我知道，你们中的大多数人都认为我是个白痴，但（开玩笑）我不是。我一直在到处寻找有关如何完... 查看详情
使用 SimpleCursorAdapter 基于 sqlite 查询更新列表视图
】使用SimpleCursorAdapter基于sqlite查询更新列表视图【英文标题】：UpdatinglistviewbasedonsqlitequerywithSimpleCursorAdapter【发布时间】：2016-01-1614:52:20【问题描述】：我有一个列表视图，其中包含一个配置文件imageview、两个文本视图和一个... 查看详情
在核心数据应用程序中嵌入预定义的 SQLITE 文档
...档的应用程序，其中预定义的数据嵌入在应用程序包中。如何指示应用程序在运行时运行嵌入文件？谢谢。-保罗。【问题 查看详情
如何在 SQLite 中创建用户定义的函数？
】如何在SQLite中创建用户定义的函数？【英文标题】：HowcanIcreateauser-definedfunctioninSQLite?【发布时间】：2011-10-2315:33:15【问题描述】：我正在用android开发一个应用程序，我需要在sqlite中创建一个udf。是否可以在sqlite中创建它？如... 查看详情
如何在 PDO 中加载 sqlite 扩展？
】如何在PDO中加载sqlite扩展？【英文标题】：HowtoloadsqliteextensioninPDO?【发布时间】：2012-02-0401:59:12【问题描述】：首先，我想通报一下这个案子，以免引起误解。通过sqlite扩展，我提到了类似FTS的Sqlite扩展，而不是PHP的sqlite扩展... 查看详情
多线程如何并发访问sqlite数据库
SQLite作为一款小型的嵌入式数据库，本身没有提供复杂的锁定机制，无法内部管理多路并发下的数据操作同步问题，更谈不上优化，所以涉及到多路并发的情况，需要外部进行读写锁控制，否则SQLite会返回SQLITE_BUSY错误，以驳回... 查看详情