Home Android SQLite Database : ListView – Filter/Search and CRUD

Android SQLite Database : ListView – Filter/Search and CRUD

Android SQLite Database : ListView – Filter/Search and CRUD




In today's tutorial,we cover how to filter/search data from SQLite database.As we always do here at ProgrammingWizards,we start from scratch.So we first create our table programmatically,Insert data,select that data from database while applying a search.We are performing a server side filter if you like,at the database level.
In short this is what we do :

  • INSERT data to our SQlite database table.
  • SELECT while performing a dynamic filter,using a searchterm specified in our SearchView.
  • Handle ItemClicks of filtered items.

 

 

 

SQlite ListView Search Project Structure

SQlite ListView Search Project Structure

 

We want to search/filter SQLite database using a SearchView.Our component is ListView.

First we will insert data to SQLite,then retrieve then filter in realtime as user searches via a SearchView.

Lets jump straight in.The first class is our Constants class which will hold all our SQlite database constants.

 

package com.tutorials.hp.sqlitefilterlistview.mDataBase;

/**
 * Created by Oclemmy on 5/2/2016 for ProgrammingWizards Channel and http://www.Camposha.com.
 */
public class Constants {
    //COLUMNS
    static final String ROW_ID="id";
    static final String NAME="name";

    //DB
    static final String DB_NAME="ii_DB";
    static final String TB_NAME="ii_TB";
    static final int DB_VERSION=1;

    //CREATE TB
    static final String CREATE_TB="CREATE TABLE ii_TB(id INTEGER PRIMARY KEY AUTOINCREMENT,"
            + "name TEXT NOT NULL);";

    //DROP TB
    static final String DROP_TB="DROP TABLE IF EXISTS "+TB_NAME;


}

 

Our DBHelper class below is responsible for upgrading our SQlite database table :

 

package com.tutorials.hp.sqlitefilterlistview.mDataBase;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by Oclemmy on 5/2/2016 for ProgrammingWizards Channel and http://www.Camposha.com.
 */
public class DBHelper extends SQLiteOpenHelper {
    public DBHelper(Context context) {
        super(context, Constants.DB_NAME, null, Constants.DB_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        try
        {
           db.execSQL(Constants.CREATE_TB);
        }catch (SQLException e)
        {
            e.printStackTrace();
        }

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
       db.execSQL(Constants.DROP_TB);
        onCreate(db);
    }
}

 

SQLite ListView Insert data

SQLite ListView Insert data

 

Then the DBAdapter class here is responsible for all our CRUD operations including searching.Now for searching we search/filter our data at the server side,at the database level via our SQL statements.

 

package com.tutorials.hp.sqlitefilterlistview.mDataBase;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.provider.SyncStateContract;

/**
 * Created by Oclemmy on 5/2/2016 for ProgrammingWizards Channel and http://www.Camposha.com.
 */
public class DBAdapter {

    Context c;
    SQLiteDatabase db;
    DBHelper helper;

    public DBAdapter(Context c) {
        this.c = c;
        helper=new DBHelper(c);
    }

    //OPEN DB
    public void openDB()
    {
        try
        {
           db=helper.getWritableDatabase();
        }catch (SQLException e)
        {
            e.printStackTrace();
        }
    }

    //CLOSE
    public void closeDB()
    {
        try
        {
            helper.close();
        }catch (SQLException e)
        {
            e.printStackTrace();
        }
    }

    //INSERT DATA
    public boolean add(String name)
    {
        try
        {
            ContentValues cv=new ContentValues();
            cv.put(Constants.NAME, name);

            db.insert(Constants.TB_NAME, Constants.ROW_ID, cv);

            return true;

        }catch (SQLException e)
        {
            e.printStackTrace();
        }
        return false;
    }

    //RETRIEVE DATA AND FILTER
    public Cursor retrieve(String searchTerm)
    {
        String[] columns={Constants.ROW_ID,Constants.NAME};
        Cursor c=null;

        if(searchTerm != null && searchTerm.length()>0)
        {
            String sql="SELECT * FROM "+Constants.TB_NAME+" WHERE "+Constants.NAME+" LIKE '%"+searchTerm+"%'";
            c=db.rawQuery(sql,null);
            return c;

        }

        c=db.query(Constants.TB_NAME,columns,null,null,null,null,null);
        return c;
    }


}











 

Our customAdapter class below shall be responsible for binding our filtered data to our ListView.

 

package com.tutorials.hp.sqlitefilterlistview.mListView;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import android.widget.Toast;

import com.tutorials.hp.sqlitefilterlistview.R;
import com.tutorials.hp.sqlitefilterlistview.mDataObject.Planet;

import java.util.ArrayList;

/**
 * Created by Oclemmy on 5/2/2016 for ProgrammingWizards Channel and http://www.Camposha.com.
 */
public class CustomAdapter extends BaseAdapter {

    Context c;
    ArrayList<Planet> planets;
    LayoutInflater inflater;

    public CustomAdapter(Context c, ArrayList<Planet> planets) {
        this.c = c;
        this.planets = planets;
    }

    @Override
    public int getCount() {
        return planets.size();
    }

    @Override
    public Object getItem(int position) {
        return planets.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if(inflater==null)
        {
            inflater= (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }
        if(convertView==null)
        {
            convertView=inflater.inflate(R.layout.model,parent,false);
        }

        TextView nameTxt= (TextView) convertView.findViewById(R.id.nameTxt);
        nameTxt.setText(planets.get(position).getName());

        final int pos=position;

        convertView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(c,planets.get(pos).getName(),Toast.LENGTH_SHORT).show();
            }
        });

        return convertView;
    }
}

 

SQlite ListView Data

SQlite ListView Data

 

Then finally we have our MainActivity class :

 

package com.tutorials.hp.sqlitefilterlistview;

import android.app.Dialog;
import android.database.Cursor;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;


import com.tutorials.hp.sqlitefilterlistview.mDataBase.DBAdapter;
import com.tutorials.hp.sqlitefilterlistview.mDataObject.Planet;
import com.tutorials.hp.sqlitefilterlistview.mListView.CustomAdapter;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView lv;
    SearchView sv;
    EditText nameEditText;
    Button saveBtn,retrieveBtn;
    CustomAdapter adapter;
    ArrayList<Planet> planets=new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

        lv= (ListView) findViewById(R.id.lv);
        sv= (SearchView) findViewById(R.id.sv);

        adapter=new CustomAdapter(this,planets);



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

                   displayDialog();
            }
        });

        sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                getPlanets(newText);
                return false;
            }
        });



    }

    private void displayDialog()
    {
        Dialog d=new Dialog(this);
        d.setTitle("SQLite Database");
        d.setContentView(R.layout.dialog_layout);

        nameEditText= (EditText) d.findViewById(R.id.nameEditTxt);
        saveBtn= (Button) d.findViewById(R.id.saveBtn);
        retrieveBtn= (Button) d.findViewById(R.id.retrieveBtn);

        saveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                save(nameEditText.getText().toString());
            }
        });
        retrieveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                 getPlanets(null);
            }
        });

        d.show();
    }

    private void save(String name)
    {
        DBAdapter db=new DBAdapter(this);
        db.openDB();
        if(db.add(name))
        {
            nameEditText.setText("");
        }else {
            Toast.makeText(this,"Unable To Save",Toast.LENGTH_SHORT).show();
        }

        db.closeDB();

        this.getPlanets(null);
    }

    private void getPlanets(String searchTerm)
    {
        planets.clear();

        DBAdapter db=new DBAdapter(this);
        db.openDB();
        Planet p=null;
        Cursor c=db.retrieve(searchTerm);
        while (c.moveToNext())
        {
            int id=c.getInt(0);
            String name=c.getString(1);

            p=new Planet();
            p.setId(id);
            p.setName(name);

            planets.add(p);
        }

        db.closeDB();

        lv.setAdapter(adapter);

    }



}










 

SQLite ListView Search data Via SearchView

SQLite ListView Search data Via SearchView

 

 

Note that the full source code is available above for download,just extract it and import to your android studio.

 

 

 

 

  • kpvs says:

    convertView=inflater.inflate(R.layout.model,parent,false);
    what is R.layout.model i am getting error in .model
    plz reply
    Thank you.

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2 comments

kpvs March 26, 2017 at 7:29 am

convertView=inflater.inflate(R.layout.model,parent,false);
what is R.layout.model i am getting error in .model
plz reply
Thank you.

Reply
Oclemy March 29, 2017 at 1:59 am

Hi we are using a custom listview.Hence the R.layout.model is a single listview viewitem layout.

Reply

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