$($give code to put into android studio using java and xml$)$ Application Title: Personal Diary App

Purpose:

To demonstrate the capabilities of Android's SharedPreferences by creating an application where

users can write and save personal diary entries.

Features and Algorithms:

$1.$ App Structure:

$$ The application should feature a simple and user$-$friendly interface for writing and viewing diary entries.

$$ Implement $`$RecyclerView$`$ for displaying a list of saved diary entries.

$2.$ Diary Entry Creation and Display:

$$ Users should be able to create new diary entries with a title and content.

$$ Display a list of entry titles on the main screen. Selecting a title should display the full diary entry.

$3.$ Use of SharedPreferences:

$$ Utilize SharedPreferences to save and retrieve diary entries.

$$ Demonstrate the use of $`$SharedPreferences$.$Editor$`$ for writing data and $`$SharedPreferences$`$ for reading data.

$$ Each diary entry $($title and content$)$ should be stored as a separate preference.

$4.$ Editing and Deleting Entries:

$$ Provide options for users to edit or delete existing entries.

$$ Reflect these changes immediately in the SharedPreferences and update the UI accordingly.

$5.$ User Interface:

$$ Design the app to be intuitive and easy to navigate.

$$ Consider implementing a floating action button for adding new entries.

$$ Use a clean and minimalist design to keep the focus on the content. To save:

$//$ Assume 'saveButton' is your button and 'nameEditText' is your EditText

saveButton.setOnClickListener$($new View.OnClickListener$()\{$

@Override

public void onClick$($View v$)\{$

String name $=$ nameEditText.getText$().$toString$()$;

$//$ Getting SharedPreferences

SharedPreferences sharedPreferences $=$ getSharedPreferences$("$MySharedPrefs$",$ MODE$\_$PRIVATE$)$;

$//$ Opening the SharedPreferences editor to write data

SharedPreferences.Editor editor $=$ sharedPreferences.edit$()$;

$//$ Storing the name with a key "userName"

editor.putString$("$userName$",$ name$)$;

$//$ Applying the changes

editor.apply$()$;

Toast.makeText$($MainActivity$.$this, "Name saved!", Toast.LENGTH$\_$SHORT$).$show$()$;

$\}$

$\})$;

To retrieve:

$//$ Getting SharedPreferences

SharedPreferences sharedPreferences $=$ getSharedPreferences$("$MySharedPrefs$",$ MODE$\_$PRIVATE$)$;

$//$ Retrieving the value using the key. The second parameter is a default value if the key doesn't exist

String name $=$ sharedPreferences.getString$("$userName$",$ "Default Name"$)$;

$//$ Now 'name' contains the stored value or "Default Name" if nothing was stored

Note: SharedPreferences is accessible throughout the application