Android
Data Storage

package edu.ius.rwisman.PreferencesExample;

import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.Locale; 

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.Toast;

public class AndroidPreferencesExample extends Activity {
	public static final String PREFS_NAME = "MyPrefsFile";
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); 
										// Read a string value with key "LastUse"
        String lastUse = settings.getString("LastUse", "");

        Toast.makeText(this, "Last time: "+ lastUse,Toast.LENGTH_LONG).show();
    }
    
    @Override
    protected void onStop(){
      super.onStop();

      SimpleDateFormat sdfDateTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
      String currentTime = sdfDateTime.format(new Date(System.currentTimeMillis()));
      
      SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);

      SharedPreferences.Editor editor = settings.edit();		// Editor object to make preference changes.
      										// Construct current date/time as String
										// Write "LastUse" key with value
      editor.putString("LastUse", currentTime);
										// Commit
      editor.commit();
      
      Toast.makeText(this, "Current time: "+ currentTime,Toast.LENGTH_LONG).show();
   }
}

package edu.ius.rwisman.AndroidFileExample;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.widget.Toast;

public class AndroidFileExample extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        									// Construct current time/date String
        SimpleDateFormat sdfDateTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
        String currentTime = sdfDateTime.format(new Date(System.currentTimeMillis()));

        String FILENAME = "TIME";

        try {
        	DataOutputStream out = new DataOutputStream(openFileOutput(FILENAME, Context.MODE_PRIVATE));
        									// Write 
        	out.writeUTF(currentTime);
         	out.close(); 
         	
        	DataInputStream in = new DataInputStream(openFileInput(FILENAME));
          									// Read  
        	String input = in.readUTF();
        	in.close(); 

        	Toast.makeText(this, "Read: "+ input,Toast.LENGTH_LONG).show();
         	
       } catch (Exception e) {}
    }
}

package edu.ius.rwisman.AndroidFileExample;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.widget.Toast;

public class AndroidFileExample extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        								
        SimpleDateFormat sdfDateTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
        String FILENAME = "TIME";

        try {
        	FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);

        	ObjectOutputStream os = new ObjectOutputStream(fos);
									// Construct, serialize and write Date
        	os.writeObject(new Date(System.currentTimeMillis()));
        	os.close();

        	FileInputStream fis = openFileInput(FILENAME);

        	ObjectInputStream is = new ObjectInputStream(fis);
									// Read object, cast as Date
        	Date date = (Date) is.readObject();
        	is.close();
        									// Convert Date object to String 
        	Toast.makeText(this, "Read: "+ sdfDateTime.format( date ),Toast.LENGTH_LONG).show();
         	
       } catch (Exception e) {}
    }
}

import java.io.Serializable;

public class Person implements Serializable {

	private String name;
	private int age;
	
	public Person(String name, int age) {
		this.name = name;
		this.age = age;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class SerializePerson {

	public static void main(String[] args) {
		String filename = "person.txt";
		Person person = new Person("Ray", 62);
		ObjectOutputStream out = null;
		ObjectInputStream in = null;
		try {
			out = new ObjectOutputStream(new FileOutputStream("person.txt"));
			out.writeObject(person);
			out.close();
		} catch (IOException ex) {
			ex.printStackTrace();
		}

		try {
			in = new ObjectInputStream(new FileInputStream(filename));
			person = (Person) in.readObject();
			in.close();
		} catch (IOException ex) {
			ex.printStackTrace();
		} catch (ClassNotFoundException ex) {
			ex.printStackTrace();
		}

		System.out.println("Person: " + person.getName() + " " + person.getAge());
	}
}

package edu.ius.rwisman.AndroidSerializeClient;

import java.io.Serializable;
public class Person implements Serializable {

	private String name;
	private int age;
	
	public Person(String name, int age) {
		this.name = name;
		this.age = age;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}

package edu.ius.rwisman.AndroidSerializeClient;

import java.io.ObjectInputStream;
import java.net.Socket;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class AndroidSerializeClientActivity extends Activity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		new Thread(new Runnable() {
			public void run() {
				try {
					Socket s = new Socket("192.168.1.75", 1990); 

					ObjectInputStream ois = new ObjectInputStream(
							s.getInputStream());
					Person p = (Person) ois.readObject();
					ois.close();
					s.close();
				} 
				catch (Exception e) { Log.d("Exception", e+""); }
			}
		}).start();
	}
}

package edu.ius.rwisman.AndroidSerializeClient;

import java.io.ObjectOutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class PersonServer {
	public static void main(String args[]) throws Exception {
		ServerSocket connection = new ServerSocket( 1990 );  
		Socket s = connection.accept();
		ObjectOutputStream out = new ObjectOutputStream(s.getOutputStream( ));
		out.writeObject(new Person("Ed", 21)); 
        		out.close();     
        		s.close();       
 	}
}		

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.ius.rwisman.AndroidSerializeClient"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="13" />
	<uses-permission android:name="android.permission.INTERNET"/>
    
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".AndroidSerializeClientActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 package edu.ius.rwisman.AndroidSQLite;

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

public class TodoDatabaseHelper extends SQLiteOpenHelper {
	private static final String DATABASE_NAME = "todoDB";
	private static final int DATABASE_VERSION = 1;

	public TodoDatabaseHelper(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
	}
						// Called on database creation
	@Override
	public void onCreate(SQLiteDatabase database) {
		database.execSQL(
                                 "create table todo (_id integer primary key autoincrement, " +
			"category text not null, summary text not null, description text not null);");
	}
						// Called on database upgrade, e.g. increasing the database version
	@Override
	public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
		database.execSQL("DROP TABLE IF EXISTS todo");
		onCreate(database);
	}
}

package edu.ius.rwisman.AndroidSQLite;

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

public class TodoDbAdapter {
								// Database fields
	public static final String KEY_ROWID = "_id";
	public static final String KEY_CATEGORY = "category";
	public static final String KEY_SUMMARY = "summary";
	public static final String KEY_DESCRIPTION = "description";

	private static final String DATABASE_TABLE = "todo";
	private Context context;
	private SQLiteDatabase database;
	private TodoDatabaseHelper dbHelper;

	public TodoDbAdapter(Context context) {
		this.context = context;
	}

	public TodoDbAdapter open() throws SQLException {

		dbHelper = new TodoDatabaseHelper(context);

		database = dbHelper.getWritableDatabase();
		return this;
	}

	public void close() {
		dbHelper.close();
	}
								// Put String values into a Content object
	private ContentValues createContentValues(String category, String summary, String description) {
		ContentValues values = new ContentValues();
		values.put(KEY_CATEGORY, category);
		values.put(KEY_SUMMARY, summary);
		values.put(KEY_DESCRIPTION, description);
		return values;
	}
								// Create a new todo. If the todo is successfully created return the new
								// rowId for that note, otherwise return a -1 to indicate failure.
	public long insertTodo(String category, String summary, String description) {
		ContentValues initialValues = createContentValues(category, summary, description);

		return database.insert(DATABASE_TABLE, null, initialValues);
	}
								// Update the todo
	public boolean updateTodo(long rowId, String category, String summary, String description) {
		ContentValues updateValues = createContentValues(category, summary, description);

		return database.update(DATABASE_TABLE, updateValues, KEY_ROWID + "=" + rowId, null) > 0;
	}
								// Deletes todo row
	public boolean deleteTodo(long rowId) {
		return database.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
	}
								// Return a Cursor over the list of all todo in the database
	public Cursor selectAllTodos() {
		return database.query(DATABASE_TABLE, new String[] { KEY_ROWID,
				KEY_CATEGORY, KEY_SUMMARY, KEY_DESCRIPTION }, null, null, null, null, null);
	}
								// Return a Cursor positioned at the defined todo
	public Cursor selectTodo(long rowId) throws SQLException {
		Cursor mCursor = database.query(true, DATABASE_TABLE, new String[] {
				KEY_ROWID, KEY_CATEGORY, KEY_SUMMARY, KEY_DESCRIPTION },
				KEY_ROWID + "=" + rowId, null, null, null, null, null);
		if (mCursor != null) 
			mCursor.moveToFirst();

		return mCursor;
	}

	public Cursor selectTodoCategory(String selectCategory) throws SQLException {
		Cursor mCursor = database.rawQuery(
				"Select * from todo where category = ?", new String[] { selectCategory });
		if (mCursor != null)
			mCursor.moveToFirst();
		return mCursor;
	}
}

package edu.ius.rwisman.AndroidSQLite;

import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.app.Activity;

public class AndroidSQLiteActivity extends Activity {
 
	private TodoDbAdapter dbAdapter;
	private Cursor cursor;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
        		setContentView(R.layout.main);
        
		dbAdapter = new TodoDbAdapter(this);
		dbAdapter.open();
		
		addData();
									// cursor at "Car" record
		cursor = dbAdapter.selectTodoCategory("Car");

		cursor = dbAdapter.selectTodo(1);		// cursor at Row 1
		
		TextView categoryText = (TextView) findViewById(R.id.categoryText);
		String s = cursor.getString(1);			// Column 1
		categoryText.setText(s);

		TextView summaryText = (TextView) findViewById(R.id.summaryText);
		s = cursor.getString(2);				// Column 2
		summaryText.setText(s);
		
		cursor = dbAdapter.selectAllTodos();		// Select all rows
		cursor.moveToFirst();				// cursor at Row 1
	}

	private void addData() {
		            //  insertTodo( category,    summary,       description)
		dbAdapter.insertTodo("Play", "Swim\nBike","Have fun");
		dbAdapter.insertTodo("Groceries", "Milk\nBread","Buy groceries");
		dbAdapter.insertTodo("Car", "Wash\nChange oil","Service");
	}
	
	public void nextOnClick(View v) {
		if(cursor.isAfterLast()) return;			// End Of Data
		
		TextView categoryText = (TextView) findViewById(R.id.categoryText);	
		String s = cursor.getString(1);
		categoryText.setText(s);

		TextView summaryText = (TextView) findViewById(R.id.summaryText);
		s = cursor.getString(2);
		summaryText.setText(s);
		
		cursor.moveToNext();				// cursor to next row
	}	

	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (dbAdapter != null) {
			dbAdapter.close();
		}
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <Button
            android:id="@+id/next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Next" 
            android:onClick="nextOnClick"/>
    <TableRow
        android:id="@+id/tableRow1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    	<TextView
        	android:id="@+id/textView1"
        	android:layout_width="wrap_content"
        	android:layout_height="wrap_content"
        	android:text="Category" />
    </TableRow>
    <TableRow
        android:id="@+id/tableRow2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >       
    	<TextView
        	android:id="@+id/categoryText"
        	android:layout_width="wrap_content"
        	android:layout_height="wrap_content"
        	android:text="TextView" />
    </TableRow>
    <TableRow
        android:id="@+id/tableRow3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >        
    	<TextView
        	android:id="@+id/textView3"
        	android:layout_width="wrap_content"
        	android:layout_height="wrap_content"
        	android:text="_____________" />
    </TableRow>
        <TableRow
        android:id="@+id/tableRow4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    	<TextView
        	android:id="@+id/textView4"
        	android:layout_width="wrap_content"
        	android:layout_height="wrap_content"
        	android:text="Summary" />
    </TableRow>
    <TableRow
        android:id="@+id/tableRow5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        	<TextView
        	android:id="@+id/summaryText"
        	android:layout_width="wrap_content"
        	android:layout_height="wrap_content"
        	android:text="TextView" />
    </TableRow>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.ius.rwisman.AndroidSQLite"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="13" />
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".AndroidSQLiteActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
	android:layout_width="fill_parent"
	android:layout_height="wrap_content" >
	<ListView
		android:id="@android:id/android:list"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
	<TextView
		android:id="@+id/category"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:textSize="28dip" />
   	<TextView
		android:id="@+id/summary"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:textSize="28dip" />
    	<TextView
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:textSize="28dip" 
		android:text="__________________________"/>
</LinearLayout>

package edu.ius.rwisman.AndroidSQLite;

import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.app.ListActivity;

public class AndroidSQLiteActivity extends ListActivity {
 
	private TodoDbAdapter dbAdapter;
	private Cursor cursor;

	@Override 
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
        		setContentView(R.layout.listview);
        
		dbAdapter = new TodoDbAdapter(this);
		dbAdapter.open();
		
		addData();								// Adds to DB each execution 
			
		cursor = dbAdapter.selectAllTodos();
		cursor.moveToFirst();
		
		startManagingCursor(cursor);

String[] from = new String[] { TodoDbAdapter.KEY_CATEGORY , TodoDbAdapter.KEY_SUMMARY };  int[] to = new int[] {                R.id.category,                               R.id.summary };

		SimpleCursorAdapter notes = new SimpleCursorAdapter(this, R.layout.todoview, cursor, from, to);

		setListAdapter(notes);
	}

	private void addData() {
		           //   insertTodo( category,    summary,       description)
		dbAdapter.insertTodo("Play", "Swim\nBike","Have fun");
		dbAdapter.insertTodo("Groceries", "Milk\nBread","Buy groceries");
		dbAdapter.insertTodo("Car", "Wash\nChange oil","Service");
	}
	
	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (dbAdapter != null) {
			dbAdapter.close();
		}
	}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.ius.rwisman.ContentProviderBrowser"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="13" />
    <uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS" />
    <uses-permission android:name="com.android.broswer.permission.WRITE_HISTORY_BOOKMARKS" />    
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name="edu.ius.rwisman.ContentProviderBrowser.ContentProviderBrowserActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     >
     <ListView  
         android:id="@android:id/list"
         android:layout_width="fill_parent" 
         android:layout_height="wrap_content" 
         />
     <TextView android:id="@android:id/empty"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Empty set"
         />
 </LinearLayout>

package edu.ius.rwisman.ContentProviderBrowser;

import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Browser;
import android.widget.SimpleCursorAdapter;

public class ContentProviderBrowserActivity extends ListActivity {
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        String[] projection = new String[] {			// Define columns to retrieve
				Browser.BookmarkColumns._ID, 
                                     	Browser.BookmarkColumns.TITLE, 
                                     	Browser.BookmarkColumns.URL};

        Cursor cursor = managedQuery(			// Retrieve projection from Browser URI
				android.provider.Browser.BOOKMARKS_URI, 
                       		projection, 
				null, null, null);
								// Define columns to display
        String[] from = new String[] { Browser.BookmarkColumns.TITLE,  Browser.BookmarkColumns.URL};
								
        int[] to = new int[] {                android.R.id.text1,                           android.R.id.text2 };
								
        setListAdapter(new SimpleCursorAdapter(	this, 
                       					android.R.layout.simple_list_item_2, 
							cursor, 
                       					from, 
							to));
   }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.ius.rwisman.ContentProviderProducer"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="13" />
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".ContentProviderProducerActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <provider android:name="TodoProvider" android:authorities="edu.ius.rwisman.TodoProvider" />
    </application>
</manifest>

package edu.ius.rwisman.ContentProviderProducer;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;

public class TodoProvider extends ContentProvider {

    public static final String PROVIDER_NAME =  "edu.ius.rwisman.TodoProvider";

    private static final String DATABASE_TABLE = "todo";
    private TodoDatabaseHelper dbHelper;         
    private static final int TODOS = 1;
    private static final int TODO_ID = 2;       
    private static final UriMatcher uriMatcher;
    
    static {										// Uri known by TodoProvider
            uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
            uriMatcher.addURI(PROVIDER_NAME, "todos", TODOS);
            uriMatcher.addURI(PROVIDER_NAME, "todos/#", TODO_ID); 
    }

    @Override
    public boolean onCreate() {							// opens todo database
 	dbHelper = new TodoDatabaseHelper(getContext());
    	return true;
    }

    @Override
    public String getType(Uri uri) {
        switch (uriMatcher.match(uri)){     
           case TODOS:									// get all todos
               return "vnd.android.cursor.dir/"+PROVIDER_NAME;
           case TODO_ID:                							// get todo #
               return "vnd.android.cursor.item/"+PROVIDER_NAME;
           default:
              throw new IllegalArgumentException("Unsupported URI: " + uri);        
        }   
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
   
 	SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
    	queryBuilder.setTables(DATABASE_TABLE);
    	
    	if(uriMatcher.match(uri) == TODO_ID)					// Append _id=2 to query for record 2
    					queryBuilder.appendWhere("_id=" + uri.getLastPathSegment());
    	
    	Cursor cursor = queryBuilder.query(					// Query database
			                     dbHelper.getReadableDatabase(),
    			                     projection, 
                   				selection, 
					selectionArgs, null, null, sortOrder, null);
    											// Send notification to any observers
    	cursor.setNotificationUri(getContext().getContentResolver(), uri);
    	return cursor; 	
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) { return null; }

    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {  return 0;  }

    @Override
    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {	return 0; }
}

package edu.ius.rwisman.ContentProviderProducer;

import android.app.Activity;
import android.os.Bundle;

public class ContentProviderProducerActivity extends Activity {
    private TodoDbAdapter dbAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        
		dbAdapter = new TodoDbAdapter(this);
		dbAdapter.open();
		
		addData();				// Adds to DB each execution 
	}

	private void addData() {
		dbAdapter.insertTodo("Play", "Swim\nBike","Have fun");
		dbAdapter.insertTodo("Groceries", "Milk\nBread","Buy groceries");
		dbAdapter.insertTodo("Car", "Wash\nChange oil","Service");
	}	
}

package edu.ius.rwisman.ContentProviderConsumer;

import android.app.ListActivity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.widget.SimpleCursorAdapter;

public class ContentProviderConsumerActivity extends ListActivity {
    
	public static final String KEY_ROWID = "_id";
	public static final String KEY_CATEGORY = "category";
	public static final String KEY_SUMMARY = "summary";
	public static final String KEY_DESCRIPTION = "description";

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

        String[] projection = new String[] { KEY_ROWID, 
        					          KEY_CATEGORY, 
        					          KEY_SUMMARY
					        }; 

 							// Return cursor to record 2
       Cursor cursor = managedQuery( 	Uri.parse("content://edu.ius.rwisman.TodoProvider/todos/2"),
 						projection, null, null, null);

        String[] from = new String[] { KEY_CATEGORY,    KEY_SUMMARY};
        
        int[] to = new int[] {               android.R.id.text1, android.R.id.text2 };

        							// Display query results
        setListAdapter(new SimpleCursorAdapter(	this, 
                       					android.R.layout.simple_list_item_2, cursor, 
                       					from, 
							to));
   }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.ius.rwisman.ContentProviderConsumer"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="13" />
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".ContentProviderConsumerActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>