Just write the below code and execute program.
XML Code:-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="#F3F3F3"
android:gravity="center"
android:orientation="vertical"
android:padding="16dp"
tools:context="com.amtechgcc.materialform.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="25dp"
android:fontFamily="casual"
android:gravity="center"
android:padding="5dp"
android:text="Encryption and Decryption Example \n by\n Ashique Aziz"
android:textColor="@android:color/black"
android:textSize="18sp" />
<EditText
android:id="@+id/InputText"
android:layout_width="match_parent"
android:layout_height="46dp"
android:layout_margin="3dp"
android:background="@android:color/white"
android:hint="Enter any text"
android:inputType="textPersonName"
android:padding="10dp"
android:textColor="#474747"
android:textSize="14sp" />
<TextView
android:id="@+id/encode"
android:layout_width="match_parent"
android:layout_height="46dp"
android:layout_margin="3dp"
android:padding="5dp"
android:text=""
android:textColor="#474747"
android:textSize="14sp" />
<TextView
android:id="@+id/decode"
android:layout_width="match_parent"
android:layout_height="46dp"
android:layout_margin="3dp"
android:padding="5dp"
android:text=""
android:textColor="#474747"
android:textSize="14sp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/btnEncode"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@android:color/holo_orange_light"
android:padding="10dp"
android:text="@string/encode"
tools:ignore="ButtonStyle" />
<Button
android:id="@+id/btnDecode"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@android:color/holo_green_light"
android:padding="10dp"
android:text="@string/decode"
tools:ignore="ButtonStyle" />
</LinearLayout>
</LinearLayout>
|
Java Code:-
package com.amtechgcc.materialform;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;
public class MainActivity extends Activity {
SecretKeySpec sks = null;
byte[] encodedBytes = null;
byte[] decodedBytes = null;
TextView text, encode, decode;
Button enc, dec;
String TestText;
@SuppressLint("SetTextI18n")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text = findViewById(R.id.InputText);
encode = findViewById(R.id.encode);
decode = findViewById(R.id.decode);
enc = findViewById(R.id.btnEncode);
dec = findViewById(R.id.btnDecode);
//.setText("\n[ORIGINAL]:\n" + TestText + "\n");
// Set up secret key spec for 128-bit AES encryption and decryption
try {
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed("any data used as random seed".getBytes());
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(128, sr);
sks = new SecretKeySpec((kg.generateKey()).getEncoded(), "AES");
} catch (Exception e) {
Toast.makeText(this, "AES secret key spec error", Toast.LENGTH_SHORT).show();
}
enc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Original text
TestText = text.getText().toString();
// Encode the original data with AES
try {
@SuppressLint("GetInstance") Cipher c = Cipher.getInstance("AES");
c.init(Cipher.ENCRYPT_MODE, sks);
encodedBytes = c.doFinal(TestText.getBytes());
} catch (Exception e) {
Toast.makeText(MainActivity.this, "AES encryption error", Toast.LENGTH_SHORT).show();
}
encode.setText("[ENCODED]:\n" + Base64.encodeToString(encodedBytes, Base64.DEFAULT) + "\n");
}
});
dec.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Original text
TestText = text.getText().toString();
// Decode the encoded data with AES
try {
@SuppressLint("GetInstance") Cipher c = Cipher.getInstance("AES");
c.init(Cipher.DECRYPT_MODE, sks);
decodedBytes = c.doFinal(encodedBytes);
} catch (Exception e) {
Toast.makeText(MainActivity.this, "AES decryption error", Toast.LENGTH_SHORT).show();
} if (decoagdedBytes != null) { decode.setText("[DECODED]:\n" + new String(decodedBytes) + "\n"); } } }); } } |
Screenshot :
Tag:- Encryption, Decryption, secure text, change password in encrypt value, username password encryption.
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