How to convert Bitmap to String and String to Bitmap

Bitmap to String:
---------------------public String BitMapToString(Bitmap bitmap){
            ByteArrayOutputStream baos=new  ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG,100, baos);
            byte [] arr=baos.toByteArray();
            String result=Base64.encodeToString(arr, Base64.DEFAULT);
            return result;
      }

String to Bitmap:
----------------------public Bitmap StringToBitMap(String image){
       try{
           byte [] encodeByte=Base64.decode(image,Base64.DEFAULT);
           Bitmap bitmap=BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
           return bitmap;
         }catch(Exception e){
           e.getMessage();
          return null;
         }
 }

Parse the below url by using JSON. Display the profile picture and the name

URL:  
http://cancos.quadlogix.com/auth/friends 

MainActivity.java
---------------------
package com.kundan.jsonparsingex;


import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
public static final String URL="http://cancos.quadlogix.com/auth/friends";
Button btn,btn2;
static ListView lv;
static TextView tv1;
static ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv=(ListView) findViewById(R.id.listView1);
tv1=(TextView) findViewById(R.id.textView1);
iv=(ImageView) findViewById(R.id.imageView1);
btn=(Button) findViewById(R.id.button1);
btn2=(Button) findViewById(R.id.button2);
btn2.setEnabled(false);
btn.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
GetJSONData task = new GetJSONData();
       task.execute(new String[] { URL });
       Toast.makeText(getApplicationContext(), "please wait till image and text loaded...", Toast.LENGTH_LONG).show();
       btn2.setEnabled(true);
}
});


      btn2.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
lv.setAdapter(new MyImageAdapter(getApplicationContext(), GetJSONData.mIcon,GetJSONData.nameID));

}
});

}



}

GetJSONData.java

---------------------------

package com.kundan.jsonparsingex;

import java.io.IOException;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.util.EntityUtils;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.os.AsyncTask;

import android.util.Base64;

import android.util.Log;

public class GetJSONData extends AsyncTask<String, Void, String> {

static String[] nameID=null;

static Bitmap[] mIcon=null;

static String[] imageID=null;

@Override

protected String doInBackground(String... urls) {

String output = null;

       for (String url : urls) {

         

output = getOutputFromUrl(url);

       }

             

       return output;

}

private String getOutputFromUrl(String url) {

String output = null;

try {

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

            DefaultHttpClient httpClient = new DefaultHttpClient();

            HttpPost httpPost = new HttpPost(url);

            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            HttpResponse httpResponse = httpClient.execute(httpPost);

            HttpEntity httpEntity = httpResponse.getEntity();

            output = EntityUtils.toString(httpEntity);

            System.out.println(output);

           try {

JSONObject jobj=new JSONObject(output);

JSONArray jarray=jobj.getJSONArray("data");

System.out.println("////////"+jarray);

JSONObject jobject=null;

nameID=new String[jarray.length()];

imageID=new String[jarray.length()];

mIcon = new Bitmap[jarray.length()];

for(int i=0;i<jarray.length();i++){

jobject=jarray.getJSONObject(i);

nameID[i]=jobject.getString("name");

imageID[i]=jobject.getString("profile_image");

mIcon[i] = StringToBitMap(imageID[i]);

//System.out.println("++++++++++"+nameID[i]);

//System.out.println("++++++++++"+imageID[i]);

}

} catch (JSONException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}    

         

            

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        } catch (ClientProtocolException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

return output;

}

@Override

   protected void onPostExecute(String output) {

super.onPostExecute(output);

MainActivity.tv1.setText(nameID[0]);

MainActivity.iv.setImageBitmap(mIcon[0]); 

   

   }

public Bitmap StringToBitMap(String encodedString) {

   try {

       byte[] encodeByte = Base64.decode(encodedString, Base64.DEFAULT);

       Bitmap bitmap = BitmapFactory.decodeByteArray(encodeByte, 0,encodeByte.length);

       return bitmap;

   } catch (Exception e) {

       e.getMessage();

       return null;

   }

}

 

}

MyImageAdapter.java

---------------------------

package com.kundan.jsonparsingex;

import android.content.Context;

import android.graphics.Bitmap;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

public class MyImageAdapter extends BaseAdapter  {

Context context;

String[] nameID;

Bitmap[] imgId;

static String str1;

public MyImageAdapter(Context context,Bitmap[] ImageID, String[] nameID ) {

this.context=context;

this.imgId=ImageID;

this.nameID=nameID;

}

@Override

public int getCount() {

return nameID.length;

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View rowView=inflater.inflate(R.layout.image_view, parent,false);

TextView name=(TextView) rowView.findViewById(R.id.nameView);

ImageView image=(ImageView) rowView.findViewById(R.id.imageView1);

name.setText(nameID[position]);

image.setImageBitmap(imgId[position]);

return rowView;

}

}

activity_main.xml

--------------------

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

   

    tools:context=".MainActivity" >

   <ListView

        android:id="@+id/listView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" 

        android:divider="#990000"

        android:dividerHeight="1dip"

        android:paddingTop="5dip"

        android:layout_marginTop="150dp">

    </ListView>

   <Button

       android:id="@+id/button1"

       android:layout_width="match_parent"

       android:layout_height="wrap_content"

       android:text="Load Profile" />

   <ImageView

       android:id="@+id/imageView1"

       android:layout_width="50dp"

       android:layout_height="50dp"

       android:layout_alignParentLeft="true"

       android:layout_below="@+id/button1"

       android:src="@drawable/ic_launcher" />

   <Button

       android:id="@+id/button2"

       android:layout_width="match_parent"

       android:layout_height="wrap_content"

       android:layout_alignParentLeft="true"

       android:layout_below="@+id/imageView1"

       android:layout_marginTop="16dp"

       android:text="View all Profile" />

   <TextView

       android:id="@+id/textView1"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:layout_alignBottom="@+id/imageView1"

       android:layout_marginLeft="19dp"

       android:layout_toRightOf="@+id/imageView1"

       android:text="TextView" />

</RelativeLayout>

image_view.xml

---------------------

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/RelativeLayout1"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <ImageView

        android:id="@+id/imageView1"

        android:layout_width="50dp"

        android:layout_height="50dp"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:src="@drawable/ic_launcher" />

    <TextView

        android:id="@+id/nameView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBottom="@+id/imageView1"

        android:layout_marginLeft="14dp"

        android:layout_toRightOf="@+id/imageView1"

        android:text="Name"

        android:textAppearance="?android:attr/textAppearanceMedium"

        android:textColor="#000099" />

</RelativeLayout>

ActionBar Tabs using FragmentPagerAdapter

MainActivity .java
------------------------

package com.kundan.actionbar_tabs;

import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;

@SuppressLint("NewApi")
public class MainActivity extends FragmentActivity implements TabListener {
private String[] tabs = { "One", "Two" };
private ViewPager viewPager;
   
   private ActionBar actionBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

        viewPager = (ViewPager) findViewById(R.id.pager);
        actionBar = getActionBar();
        viewPager.setAdapter(new TabsPagerAdapter(getSupportFragmentManager()));
        actionBar.setHomeButtonEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);        

        // Adding Tabs
        for (String tab_name : tabs) {
            actionBar.addTab(actionBar.newTab().setText(tab_name).setTabListener(this));
        }
}

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

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub

}

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
viewPager.setCurrentItem(tab.getPosition());


}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub

}

}

TabsPagerAdapter .java

-----------------------------

package com.kundan.actionbar_tabs;

import android.support.v4.app.Fragment;

import android.support.v4.app.FragmentManager;

import android.support.v4.app.FragmentPagerAdapter;

public class TabsPagerAdapter extends FragmentPagerAdapter{

public TabsPagerAdapter(FragmentManager fm) {

super(fm);

}

@Override

public Fragment getItem(int index) {

switch (index) {

       case 0:

           

           return new One();

       case 1:

          

           return new Two();

       

       }

 

       return null;

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return 2;

}

}

One .java

------------

package com.kundan.actionbar_tabs;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

public class One extends Fragment{

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

ViewGroup viewGroup=(ViewGroup) inflater.inflate(R.layout.first, container,false);

return viewGroup;

 

}

}

Two .java

----------------

package com.kundan.actionbar_tabs;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

public class Two extends Fragment{

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

ViewGroup viewGroup=(ViewGroup) inflater.inflate(R.layout.two, container,false);

return viewGroup;

 

}

}

activity_main.xml

-------------------

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

<android.support.v4.view.ViewPager 

    android:id="@+id/pager"

    android:layout_width="match_parent"

    android:layout_height="match_parent"/>

</RelativeLayout>

first.xml

--------------

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" 

    android:background="#996699">

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="First fragment" 

        android:layout_gravity="center"/>

</LinearLayout>

two.xml

-------------

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" 

    android:background="#996600">

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Second Fragment" 

        android:layout_gravity="center"

        />

</LinearLayout>

NOTE: you can slide left or right also...!!!

XML Parsing using XmlPullParser

players.xml
------------
<?xml version="1.0" encoding="UTF-8"?>
<players>
    <player>
        <id>1</id>
        <name>SACHIN</name>
        <salary>50000</salary>      
    </player>
    <player>
        <id>2</id>
        <name>KUNDAN</name>
        <salary>60000</salary>  
    </player>
    
</players>

player.java
-------------
package com.example.xmlpullparsing;
public class Player {
private int id;
private String name;
private float salary;

    
    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 float getSalary() {
return salary;
}


public void setSalary(float salary) {
this.salary = salary;
}


@Override
    public String toString() {
        return " Id= "+id + "\n Name= " + name + "\n Salary= " + salary;
    }
}

XmlPullParserHandler .java
--------------------------------

package com.example.xmlpullparsing;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;


public class XmlPullParserHandler {
    private List<Player> players= new ArrayList<Player>();
    private Player player;
    private String text;

    public List<Player> getPlayers() {
        return players;
    }

    public List<Player> parse(InputStream is) {
           try {
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            factory.setNamespaceAware(true);
            XmlPullParser  parser = factory.newPullParser();

            parser.setInput(is, null);

            int eventType = parser.getEventType();
            while (eventType != XmlPullParser.END_DOCUMENT) {
                String tagname = parser.getName();
                switch (eventType) {
                case XmlPullParser.START_TAG:
                    if (tagname.equalsIgnoreCase("player")) {
                        // create a new instance of employee
                        player = new Player();
                    }
                    break;

                case XmlPullParser.TEXT:
                    text = parser.getText();
                    break;

                case XmlPullParser.END_TAG:
                    if (tagname.equalsIgnoreCase("player")) {
                        // add employee object to list
                        players.add(player);
                    }else if (tagname.equalsIgnoreCase("id")) {
                    player.setId(Integer.parseInt(text));
                    }  else if (tagname.equalsIgnoreCase("name")) {
                    player.setName(text);
                    } else if (tagname.equalsIgnoreCase("salary")) {
                    player.setSalary(Float.parseFloat(text));
                    } 
                    break;

                default:
                    break;
                }
                eventType = parser.next();
            }

        } catch (XmlPullParserException e) {
        e.printStackTrace();
        } 
        catch (IOException e) {
        e.printStackTrace();
        }

        return players;
    }
}

MainActivity .java
-------------------
package com.example.xmlpullparsing;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
       ListView listView = (ListView) findViewById(R.id.listView1);
       
        List<Player> players = null;
        try {
            XmlPullParserHandler parser = new XmlPullParserHandler();
            InputStream is=getAssets().open("players.xml");
            players = parser.parse(is);
            
            ArrayAdapter<Player> adapter =new ArrayAdapter<Player>(this,android.R.layout.simple_list_item_1, players);
            listView.setAdapter(adapter);
            
        } catch (IOException e) {e.printStackTrace();}
        
    }

    @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;
    }
    
}

activity_main.xml

-------------------

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >

    <ListView

        android:id="@+id/listView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" 

        android:divider="#FFCC00"

    android:dividerHeight="4px"

   

    >

    </ListView>

</RelativeLayout>

disable an Android button

btn.setEnabled(false);

SQLite CURD Operation

Contact.java
--------------
package com.mangium.databaseoperation;

public class Contact {
String id;
String name;
String phone;
public Contact() {
super();
}
public Contact(String id, String name, String phone) {
super();
this.id = id;
this.name = name;
this.phone = phone;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}


}

DatabaseHandler.java

-------------------------

package com.mangium.databaseoperation;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

import android.util.Log;

import android.widget.Toast;

public class DatabaseHandler extends SQLiteOpenHelper{

private static final int DATABASE_VERSION = 1;    

    private static final String DATABASE_NAME = "mydb";   

    static final String TABLE_CONTACTS = "contacts";

    private static final String KEY_ID = "id";

    private static final String KEY_NAME = "name";

    private static final String KEY_PH_NO = "phone";

public DatabaseHandler(Context context) {

super(context, DATABASE_NAME, null, DATABASE_VERSION);

}

@Override

public void onCreate(SQLiteDatabase db) {

String STUDENT_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("

                + KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"

                + KEY_PH_NO + " TEXT" + ")";

        db.execSQL(STUDENT_CONTACTS_TABLE);

}

@Override

public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);        

        onCreate(db);

}

public void addContact(Contact contact) {

       SQLiteDatabase db = this.getWritableDatabase();  

       ContentValues val = new ContentValues();        

val.put("ID", contact.getId());

val.put("NAME", contact.getName());

val.put("PHONE", contact.getPhone());       

       db.insert(TABLE_CONTACTS, null, val);

       db.close();

   }

public void getContact(String id) {

   SQLiteDatabase db = this.getReadableDatabase();      

   Cursor cur = db.query(TABLE_CONTACTS, null, null, null, null, null, null);

   while(cur.moveToNext()){

    try{

    String val=cur.getString(0);

    if(val.equals(id)){

           

    try{

   

    String name=cur.getString(1);

    String phone=cur.getString(2);

    Show_home.tv1.setText(name);

    Show_home.tv2.setText(phone);

   

    }catch(Exception e){

    e.printStackTrace();

    }

   

    db.close();

    }

    }catch (Exception e){

    e.printStackTrace();

    }

   

   }

   

   cur.close();

}

 

public void deleteContact(String id){

SQLiteDatabase db = this.getWritableDatabase();

String where=KEY_ID+"=?";

String[]whereArgs=new String[]{id};

db.delete(TABLE_CONTACTS, where, whereArgs);

db.close();

}

public void updateContact(String id){

SQLiteDatabase db = this.getWritableDatabase();

String where=KEY_ID+"=?";

String[]whereArgs=new String[]{id};

/*Update.editText1.setText(Show_home.tv1.getText());

Update.editText2.setText(Show_home.tv2.getText());*/

ContentValues val=new ContentValues();  

val.put("NAMe", Update.editText1.getText().toString());

val.put("PHONE", Update.editText2.getText().toString());

db.update(TABLE_CONTACTS, val, where, whereArgs);

 

}

}

MainActivity.java

-------------------

package com.mangium.databaseoperation;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

static EditText ed1;

static EditText ed2;

static EditText ed3;

Button insert_btn, show_btn;

String str1,str2,str3;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ed1=(EditText) findViewById(R.id.editText1);

ed2=(EditText) findViewById(R.id.editText2);

ed3=(EditText) findViewById(R.id.editText3);

insert_btn=(Button) findViewById(R.id.insertbtn);

show_btn=(Button) findViewById(R.id.showbtn);

insert_btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

DatabaseHandler db = new DatabaseHandler(getApplicationContext());

String id=ed1.getText().toString();

String nm=ed2.getText().toString();

String ph=ed3.getText().toString();

Contact contact=new Contact(id,nm,ph);

db.addContact(contact);

ed2.setText(null);

ed3.setText(null);

ed1.requestFocus();

ed1.setSelectAllOnFocus(true);

Toast.makeText(getApplicationContext(), "Record inserted successfully..", Toast.LENGTH_SHORT).show();

 

}

});

show_btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Intent i=new Intent(getApplicationContext(),Show_home.class);

startActivity(i);

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

}

Show_home.java

-------------------

package com.mangium.databaseoperation;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class Show_home extends Activity{

static EditText ed1;

static TextView tv1,tv2;

Button searchbtn,delbtn,updatebtn;

String str;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.show_home);

ed1=(EditText) findViewById(R.id.editText);

searchbtn=(Button) findViewById(R.id.okbtn);

tv1=(TextView) findViewById(R.id.nameView);

tv2=(TextView) findViewById(R.id.phoenView);

delbtn=(Button) findViewById(R.id.delbutton);

updatebtn=(Button) findViewById(R.id.updatebutton);

searchbtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

DatabaseHandler db = new DatabaseHandler(getApplicationContext());

db.getContact(ed1.getText().toString());

ed1.requestFocus();

ed1.setSelectAllOnFocus(true);

Toast.makeText(getApplicationContext(), "SUCCESS...!!!", Toast.LENGTH_SHORT).show();

}

});

delbtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

DatabaseHandler db = new DatabaseHandler(getApplicationContext());

db.deleteContact(ed1.getText().toString());

Toast.makeText(getApplicationContext(), "Record Deleted...with ID="+ed1.getText().toString(), Toast.LENGTH_SHORT).show();

tv1.setText("null");

tv2.setText("null");

}

});

updatebtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Intent i=new Intent(getApplicationContext(),Update.class);

startActivity(i);

}

});

}

}

Update.java

------------------

package com.mangium.databaseoperation;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class Update extends Activity {

Button updatebutton;

static EditText editText1,editText2;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.update);

editText1=(EditText) findViewById(R.id.updatenmText);

editText2=(EditText) findViewById(R.id.updatephText);

updatebutton=(Button) findViewById(R.id.updatebutton1);

editText1.setText(Show_home.tv1.getText());

editText2.setText(Show_home.tv2.getText());

updatebutton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

DatabaseHandler db = new DatabaseHandler(getApplicationContext());

db.updateContact(Show_home.ed1.getText().toString());

Toast.makeText(getApplicationContext(), "Record updated successfully", Toast.LENGTH_SHORT).show();

Intent intent=new Intent(getApplicationContext(),Show_home.class);

startActivity(intent);

}

});

}

}

activity_main.xml

----------------------

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <EditText

        android:id="@+id/editText1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="63dp"

        android:ems="10"

        android:hint="Enter Student id"

        android:selectAllOnFocus="true" 

        android:inputType="number"/>

    <requestFocus />

    <EditText

        android:id="@+id/editText2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/editText1"

        android:layout_below="@+id/editText1"

        android:layout_marginTop="17dp"

        android:ems="10"

        android:hint="Enter Student Name" >

    </EditText>

    <EditText

        android:id="@+id/editText3"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/editText2"

        android:layout_below="@+id/editText2"

        android:layout_marginTop="18dp"

        android:ems="10"

        android:hint="Enter Student Phone" 

        android:inputType="number"/>

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:gravity="center"

        android:text="@string/head_title"

        android:textSize="18sp" />

    <LinearLayout

        android:id="@+id/LinearLayout1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/editText3"

        android:layout_below="@+id/editText3"

        android:layout_marginTop="88dp"

        android:orientation="horizontal" >

        <Button

            android:id="@+id/showbtn"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:text="Search" />

        <Button

            android:id="@+id/insertbtn"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:text="Insert" />

    </LinearLayout>

</RelativeLayout>

show_home.xml

------------------

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/RelativeLayout1"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <EditText

        android:id="@+id/editText"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="40sp"

        android:ems="10"

        android:hint="Enter Student Id" 

        android:selectAllOnFocus="true"/>

<requestFocus />

    <TextView

        android:id="@+id/phoenView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/textView2"

        android:layout_alignBottom="@+id/textView2"

        android:layout_alignLeft="@+id/nameView"

        android:text="null"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView

        android:id="@+id/textView2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/textView1"

        android:layout_marginTop="22dp"

        android:text="Phone"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button

        android:id="@+id/okbtn"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentRight="true"

        android:layout_below="@+id/editText"

        android:layout_marginTop="16dp"

        android:text="Search" />

    <TextView

        android:id="@+id/textView3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:text="@string/search_info" 

        android:textSize="18sp"/>

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignRight="@+id/textView2"

        android:layout_below="@+id/okbtn"

        android:layout_marginTop="34dp"

        android:text="Name"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button

        android:id="@+id/updatebutton"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/phoenView"

        android:layout_marginTop="30dp"

        android:text="Update" />

    <TextView

        android:id="@+id/nameView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_above="@+id/textView2"

        android:layout_marginLeft="22dp"

        android:layout_toRightOf="@+id/textView1"

        android:text="null"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button

        android:id="@+id/delbutton"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/updatebutton"

        android:text="Delete" />

</RelativeLayout>

update.xml

--------------

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/RelativeLayout1"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="15dp"

        android:text="@string/update_record" 

        android:textSize="18sp"/>

    <EditText

        android:id="@+id/updatenmText"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView1"

        android:layout_below="@+id/textView1"

        android:layout_marginTop="22dp"

        android:ems="10"

        android:hint="Enter new Name" />

    <EditText

        android:id="@+id/updatephText"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/updatenmText"

        android:layout_below="@+id/updatenmText"

        android:layout_marginTop="15dp"

        android:ems="10"

        android:hint="Enter new Phone"

        android:inputType="number" />

    <TextView

        android:id="@+id/textView2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/updatenmText"

        android:layout_alignBottom="@+id/updatenmText"

        android:layout_alignParentLeft="true"

        android:text="Name" 

        android:layout_marginLeft="10dp"

        android:textSize="16sp"/>

    <TextView

        android:id="@+id/textView3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/updatephText"

        android:layout_alignBottom="@+id/updatephText"

        android:layout_alignParentLeft="true"

        android:text="Phone" 

        android:layout_marginLeft="10dp"

        android:textSize="16sp"/>

    <Button

        android:id="@+id/updatebutton1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/updatephText"

        android:layout_marginTop="33dp"

        android:text="Update" />

</RelativeLayout>

strings.xml

-------------

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">DatabaseOperation</string>

    <string name="action_settings">Settings</string>

    <string name="hello_world">Hello world!</string>

 <string name="head_title"><u>Student Information</u></string>

 <string name="search_info"><u>Search Results</u></string>

 <string name="update_record"><u>Update Records</u></string>

</resources>

AndroidManifest.xml

----------------------

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.mangium.databaseoperation"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="18" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.mangium.databaseoperation.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity android:name="Show_home"></activity>

        <activity android:name="Update"></activity>

    </application>

</manifest>