package com.lrosier.encryptdecrypt;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.*;
import android.widget.*;



public class EncryptDecryptActivity extends ActionBarActivity {

	// instance variables go here
	EditText encryptedEditText;
	EditText decryptedEditText; 
	
	
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_encrypt_decrypt);
        
        encryptedEditText = (EditText) findViewById(R.id.encryptedittext);
        decryptedEditText = (EditText) findViewById(R.id.decryptedittext);
        
    }


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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
    
    public void buttonEncryptClick(View view)
    {
    	// handle encryption the data
    	// encryptedittext
    	String data =  encryptedEditText.getText().toString();
    	data = encrypt(data);
    	decryptedEditText.setText(data);
    }
    

    public void buttonDecryptClick(View view)
    {
    	// handle decryption the data
    	// decryptedittext
    	String data =  decryptedEditText.getText().toString();
    	data = decrypt(data);
    	encryptedEditText.setText(data);
    }

    public String encrypt(String message)
    {
    	String encrypted = "";
    
    	for (int i=0; i<message.length(); i++)
    	{
    		int ch = message.charAt(i);
    		
    		int x;
    		
    		if (i%3==0)
    			x = 1;
    		else if (i%3==1)
    			x = 2;
    		else
    			x = 3;

    		ch = ch << x;
    		
    		encrypted += (char) ch;
    	}
    	
    	return encrypted;
    }

    public String decrypt(String message)
    {
    	String decrypted = "";
    
    	for (int i=0; i<message.length(); i++)
    	{
    		int ch = message.charAt(i);
    		
    		int x;
    		
    		if (i%3==0)
    			x = 1;
    		else if (i%3==1)
    			x = 2;
    		else
    			x = 3;

    		ch = ch >> x;
    		
    		decrypted += (char) ch;
    	}
    	
    	return decrypted;
    }

}


<?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"
    >


   <LinearLayout android:id="@+id/linearLayout1" android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent">

		<TextView 
			android:textSize="24sp"
			android:id="@+id/encrypttextview"
    		android:layout_width="50sp" 
    		android:layout_height="wrap_content" 
    		android:text="Encrypt"
    		android:layout_weight="1"
    		android:layout_gravity="center"
    	/>
	</LinearLayout>
	
   <LinearLayout android:id="@+id/linearLayout2" android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent">
   
		<EditText  
			android:textSize="24sp"
			android:id="@+id/encryptedittext"
			android:editable="true"
    		android:layout_width="wrap_content" 
    		android:layout_height="wrap_content" 
			android:layout_gravity="center"
    		android:text=""
    		android:singleLine="false"
    		android:layout_weight="4"
    	/>

	</LinearLayout>


   <LinearLayout android:id="@+id/linearLayout3" android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent">

		<TextView 
			android:textSize="24sp"
			android:id="@+id/decrypttextview"
    		android:layout_width="50sp" 
    		android:layout_height="wrap_content" 
    		android:text="Decrypt"
    		android:layout_weight="1"
    		android:layout_gravity="center"
    	/>
	</LinearLayout>
		
   
   <LinearLayout android:id="@+id/linearLayout4" android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent">
		
       		<EditText  
			android:textSize="24sp"
			android:id="@+id/decryptedittext"
			android:editable="true"
    		android:layout_width="wrap_content" 
    		android:layout_height="wrap_content" 
			android:layout_gravity="center"
    		android:text=""
    		android:singleLine="false"
    		android:layout_weight="4"
    	/>

	</LinearLayout>


 
   
    <LinearLayout android:id="@+id/linearLayout5" android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent">
       <Button 
			android:textSize="16sp"
        	android:text="Encrypt" 
        	android:id="@+id/buttonEncrypt" 
        	android:layout_width="wrap_content" 
        	android:layout_height="wrap_content"
        	android:layout_weight="1"
			android:onClick="buttonEncryptClick"
        >
        </Button>

       <Button 
			android:textSize="16sp"
        	android:text="Decrypt" 
        	android:id="@+id/Decrypt" 
        	android:layout_width="wrap_content" 
        	android:layout_height="wrap_content"
        	android:layout_weight="1"
			android:onClick="buttonDecryptClick"
        >
        </Button>


    </LinearLayout>

    
</LinearLayout>