Android-Populate ListView from SQLite Database (Insert, Update,Delete)

Hello Everyone.. I am going to post this after long time. I created this tutorial before 2 month but today I got time to post here.

Today in this tutorial I will show you:

1. Create table in SQLite
2. Insert data into SQLite
3. Update data into SQLite
4. Delete data from SQLite

What to do ?

• In this project I want to create a table in SQLite database. And store first name and last name for a person.
• Then I can edit/update them by clicking on it.
• Also, I can delete a person by long press on it.

How to do ?

• Create one SQLiteOpenHelper class to create table in database.
•  Create two Activities, one for adding data and second for displaying list of data
• Create BaseAdapter to bind data in listview
• Some xml files for layouts

What is Result ?

At the end of this tutorial we will get output as shown in following screenshots.

In this project we can add a person's first name and last name, edit it and delete it.

Special Thanks

Before moving towards coding I want to Thanks to Hiral Kanojiya. She wrote most of the code for this tutorial, I just guide her and then polished the code. Really without her help I could never get time to post this.

Thank You very much Hiral Kanojiya.

Screenshots

//Create table into SQLite Database
DbHelper.java

package com.hk.sqlitedemo;

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

public class DbHelper extends SQLiteOpenHelper {
    static String DATABASE_NAME="userdata";
    public static final String TABLE_NAME="user";
    public static final String KEY_FNAME="fname";
    public static final String KEY_LNAME="lname";
    public static final String KEY_ID="id";
    public DbHelper(Context context) {
        super(context, DATABASE_NAME, null, 1);
       
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_TABLE="CREATE TABLE "+TABLE_NAME+" ("+KEY_ID+" INTEGER PRIMARY KEY, "+KEY_FNAME+" TEXT, "+KEY_LNAME+" TEXT)";
        db.execSQL(CREATE_TABLE);

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
        onCreate(db);

    }

}


//activity to add recored
AddActivity.java

package com.hk.sqlitedemo;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class AddActivity extends Activity implements OnClickListener {
private Button btn_save;
private EditText edit_first,edit_last;
private DbHelper mHelper;
private SQLiteDatabase dataBase;
private String id,fname,lname;
private boolean isUpdate;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.add_activity);
       
        btn_save=(Button)findViewById(R.id.save_btn);
        edit_first=(EditText)findViewById(R.id.frst_editTxt);
        edit_last=(EditText)findViewById(R.id.last_editTxt);
        
       isUpdate=getIntent().getExtras().getBoolean("update");
        if(isUpdate)
        {
            id=getIntent().getExtras().getString("ID");
            fname=getIntent().getExtras().getString("Fname");
            lname=getIntent().getExtras().getString("Lname");
            edit_first.setText(fname);
            edit_last.setText(lname);
           
        }
        
         btn_save.setOnClickListener(this);
        
         mHelper=new DbHelper(this);
       
    }

    // saveButton click event
    public void onClick(View v) {
        fname=edit_first.getText().toString().trim();
        lname=edit_last.getText().toString().trim();
        if(fname.length()>0 && lname.length()>0)
        {
            saveData();
        }
        else
        {
            AlertDialog.Builder alertBuilder=new AlertDialog.Builder(AddActivity.this);
            alertBuilder.setTitle("Invalid Data");
            alertBuilder.setMessage("Please, Enter valid data");
            alertBuilder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
               
                public void onClick(DialogInterface dialog, int which) {
                       dialog.cancel();
                   
                }
            });
            alertBuilder.create().show();
        }
       
    }

    /**
     * save data into SQLite
     */
    private void saveData(){
        dataBase=mHelper.getWritableDatabase();
        ContentValues values=new ContentValues();
       
        values.put(DbHelper.KEY_FNAME,fname);
        values.put(DbHelper.KEY_LNAME,lname );
       
        System.out.println("");
        if(isUpdate)
        {   
            //update database with new data
            dataBase.update(DbHelper.TABLE_NAME, values, DbHelper.KEY_ID+"="+id, null);
        }
        else
        {
            //insert data into database
            dataBase.insert(DbHelper.TABLE_NAME, null, values);
        }
        //close database
        dataBase.close();
        finish();
       
       
    }

}

//activity to display record in list
DisplayActivity.java

package com.hk.sqlitedemo;

import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ListView;
import android.widget.Toast;

public class DisplayActivity extends Activity {

    private DbHelper mHelper;
    private SQLiteDatabase dataBase;

    private ArrayList<String> userId = new ArrayList<String>();
    private ArrayList<String> user_fName = new ArrayList<String>();
    private ArrayList<String> user_lName = new ArrayList<String>();

    private ListView userList;
    private AlertDialog.Builder build;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.display_activity);

        userList = (ListView) findViewById(R.id.List);

        mHelper = new DbHelper(this);
       
        //add new record
        findViewById(R.id.btnAdd).setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                Intent i = new Intent(getApplicationContext(), AddActivity.class);
                i.putExtra("update", false);
                startActivity(i);

            }
        });
       
        //click to update data
        userList.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

                Intent i = new Intent(getApplicationContext(), AddActivity.class);
                i.putExtra("Fname", user_fName.get(arg2));
                i.putExtra("Lname", user_lName.get(arg2));
                i.putExtra("ID", userId.get(arg2));
                i.putExtra("update", true);
                startActivity(i);

            }
        });
       
        //long click to delete data
        userList.setOnItemLongClickListener(new OnItemLongClickListener() {

            public boolean onItemLongClick(AdapterView<?> arg0, View arg1, final int arg2, long arg3) {

                build = new AlertDialog.Builder(DisplayActivity.this);
                build.setTitle("Delete " + user_fName.get(arg2) + " " + user_lName.get(arg2));
                build.setMessage("Do you want to delete ?");
                build.setPositiveButton("Yes",new DialogInterface.OnClickListener() {

                            public void onClick(DialogInterface dialog, int which) {

                                Toast.makeText( getApplicationContext(),
                                        user_fName.get(arg2) + " "
                                                + user_lName.get(arg2)
                                                + " is deleted.", 3000).show();

                                dataBase.delete(
                                        DbHelper.TABLE_NAME,
                                        DbHelper.KEY_ID + "="
                                                + userId.get(arg2), null);
                                displayData();
                                dialog.cancel();
                            }
                        });

                build.setNegativeButton("No", new DialogInterface.OnClickListener() {

                            public void onClick(DialogInterface dialog, int which) {
                                    dialog.cancel();
                            }
                        });
                AlertDialog alert = build.create();
                alert.show();

                return true;
            }
        });
    }

    @Override
    protected void onResume() {
        displayData();
        super.onResume();
    }

    /**
     * displays data from SQLite
     */
    private void displayData() {
        dataBase = mHelper.getWritableDatabase();
        Cursor mCursor = dataBase.rawQuery("SELECT * FROM " + DbHelper.TABLE_NAME, null);

        userId.clear();
        user_fName.clear();
        user_lName.clear();
        if (mCursor.moveToFirst()) {
            do {
                userId.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_ID)));
                user_fName.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_FNAME)));
                user_lName.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_LNAME)));

            } while (mCursor.moveToNext());
        }
        DisplayAdapter disadpt = new DisplayAdapter(DisplayActivity.this,userId, user_fName, user_lName);
        userList.setAdapter(disadpt);
        mCursor.close();
    }

   

}

//adapter to load data into list
DisplayAdapter.java

package com.hk.sqlitedemo;

import java.util.ArrayList;

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

public class DisplayAdapter extends BaseAdapter {
    private Context mContext;
    private ArrayList<String> id;
    private ArrayList<String> firstName;
    private ArrayList<String> lastName;
   

    public DisplayAdapter(Context c, ArrayList<String> id,ArrayList<String> fname, ArrayList<String> lname) {
        this.mContext = c;

        this.id = id;
        this.firstName = fname;
        this.lastName = lname;
    }

    public int getCount() {
        // TODO Auto-generated method stub
        return id.size();
    }

    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return null;
    }

    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    public View getView(int pos, View child, ViewGroup parent) {
        Holder mHolder;
        LayoutInflater layoutInflater;
        if (child == null) {
            layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            child = layoutInflater.inflate(R.layout.listcell, null);
            mHolder = new Holder();
            mHolder.txt_id = (TextView) child.findViewById(R.id.txt_id);
            mHolder.txt_fName = (TextView) child.findViewById(R.id.txt_fName);
            mHolder.txt_lName = (TextView) child.findViewById(R.id.txt_lName);
            child.setTag(mHolder);
        } else {
            mHolder = (Holder) child.getTag();
        }
        mHolder.txt_id.setText(id.get(pos));
        mHolder.txt_fName.setText(firstName.get(pos));
        mHolder.txt_lName.setText(lastName.get(pos));

        return child;
    }

    public class Holder {
        TextView txt_id;
        TextView txt_fName;
        TextView txt_lName;
    }

}

You can download source code from Here

Android TabNavigation like google play store app using PagerTabStrip

      Now a days fragments and swipy tabs are very popular. I have searched so much on google for tabs like playsotre app. And finally I have implemented it in one of my app.

       So today I am going to share it with you. It is simple example but I hope it may help you to get started with it.


Here is layout file which contains viewpager for page sliding and pagertabstrip to slide tabs.

activity_main.xml

<android.support.v4.view.ViewPager    
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <!--
    This title strip will display the currently visible page title, as well as the page
    titles for adjacent pages.
    -->

    <android.support.v4.view.PagerTabStrip
        android:id="@+id/pager_title_strip"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:background="#676966"
        android:paddingBottom="4dp"
        android:paddingTop="4dp"
        android:textColor="#6CBD57" />

</android.support.v4.view.ViewPager>


Here is java file for main activity. In this tutorial I am using android.support.v4 library.
MainActivity.java


package com.example.tabnavigation;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MainActivity extends FragmentActivity {

    //create object of FragmentPagerAdapter
    SectionsPagerAdapter mSectionsPagerAdapter;

    //viewpager to display pages
    ViewPager mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Create the adapter that will return a fragment for each of the five
        // primary sections of the app.
        mSectionsPagerAdapter = new SectionsPagerAdapter(
                getSupportFragmentManager());

        // Set up the ViewPager with the sections adapter.
        mViewPager = (ViewPager) findViewById(R.id.pager);
        mViewPager.setAdapter(mSectionsPagerAdapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    /**
     * A  FragmentPagerAdapter that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            // getItem is called to instantiate the fragment for the given page.
            // Return a DummySectionFragment (defined as a static inner class
            // below) with the page number as its lone argument.
            Fragment fragment = new DummySectionFragment();
            Bundle args = new Bundle();
            args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public int getCount() {
            // Show 5 total pages.
            return 5;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            switch (position) {
            case 0:
                return "Section 1";
            case 1:
                return "Section 2";
            case 2:
                return "Section 3";
            case 3:
                return "Section 4";
            case 4:
                return "Section 5";
            }
            return null;
        }
    }

    /**
     * A dummy fragment representing a section of the app, but that simply
     * displays dummy text.
     */
    public static class DummySectionFragment extends Fragment {
        /**
         * The fragment argument representing the section number for this
         * fragment.
         */
        public static final String ARG_SECTION_NUMBER = "section_number";

        public DummySectionFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            // Create a new TextView and set its text to the fragment's section
            // number argument value.
            TextView textView = new TextView(getActivity());
            textView.setGravity(Gravity.CENTER);
            textView.setText(Integer.toString(getArguments().getInt(
                    ARG_SECTION_NUMBER)));
            return textView;
        }
    }

}


Njoy!! Please let me know if you have any query or you have suggestion for me.

Store ArrayList in android SharedPreference

Here I am going to explain how to store arraylist in sharedpreference.
Let's say I have an arraylist as following.

ArrayList<String> myArrayList=new ArrayList<String>();

myArrayList.add("value1");
myArrayList.add("value2");
myArrayList.add("value3");
myArrayList.add("value4");
myArrayList.add("value5");
myArrayList.add("value6");

Store arraylist in sharedpreference

SharedPreference sPrefs=PreferenceManager.getDefaultSharedPreferences(context);
SharedPreference.Editor sEdit=sPrefs.edit();

for(int i=0;i<myArrayList.size();i++)
{
         sEdit.putString("val"+i,myArrayList.get(i);
}
 sEdit.putInt("size",myArrayList.size());
 sEdit.commit();

Retrive arraylist from sharedpreference

I am retriving values in another arraylist

ArrayList<String> myAList=new ArrayList<String>();
int size=sPrefs.getInt("size",0);

for(int j=0;j<size;j++)
{
          myAList.add(sPrefs.getString("val"+j));
}