android base64 和 aes 加密 解密

package pioneerbarcode.ccw.com.encryptanddecode;

import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.text.TextUtils;import android.util.Base64;import android.view.View;import android.widget.Button;import android.widget.TextView;

import pioneerbarcode.ccw.com.encryptanddecode.utils.AesUtils;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private Button btnBase64New;    private Button btnBase64Older;    private TextView tvOlder;    private String strOlderData;    private TextView tvJiaMiData;    private TextView tvJieMiData;    private Button btnAesJiaMi;    private Button btnAesjieMi;    private TextView tvAesJiaMiData;    private TextView tvAesJieMiData;

    private static String AESPASSWORD = "hehehe";

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        setView();        setListener();    }

private void setListener() {        btnBase64New.setOnClickListener(this);        btnBase64Older.setOnClickListener(this);        btnAesJiaMi.setOnClickListener(this);        btnAesjieMi.setOnClickListener(this);    }

private void setView() {        btnBase64New = (Button) findViewById(R.id.btn_base64_jiemi);        btnBase64Older = (Button) findViewById(R.id.btn_base64_jiami);        tvOlder = (TextView) findViewById(R.id.tv_older);        tvJiaMiData = (TextView) findViewById(R.id.tv_jiami_data);        tvJieMiData = (TextView) findViewById(R.id.tv_jiemi_data);

btnAesJiaMi = (Button) findViewById(R.id.btn_Aes_jiami);        btnAesjieMi = (Button) findViewById(R.id.btn_Aes_jiemi);        tvAesJiaMiData = (TextView) findViewById(R.id.tv_Aes_jiami_data);        tvAesJieMiData = (TextView) findViewById(R.id.tv_Aes_jiemi_data);

strOlderData = tvOlder.getText().toString().trim();    }

@Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.btn_base64_jiemi:                //base64 解密                base64Decode();                break;            case R.id.btn_base64_jiami:                //Base64加密                base64Encrypt();                break;            case R.id.btn_Aes_jiami:                //Aes 加密                aesEncrypt();                break;            case R.id.btn_Aes_jiemi:                //Aes 解密                aesDecode();                break;            default:                break;        }    }

/**     * Aes 解密     */    private void aesDecode() {        try {            if (!TextUtils.isEmpty(tvAesJiaMiData.getText().toString().toString().trim())) {                // Aes 解密后的数据                String data = AesUtils.decrypt(AESPASSWORD, tvAesJiaMiData.getText().toString().trim());                tvAesJieMiData.setText(data);            }        } catch (Exception e) {            e.printStackTrace();        }    }

/**     * Aes 加密     */    private void aesEncrypt() {        try {            String data = AesUtils.encrypt(AESPASSWORD, strOlderData);            //加密后的串            tvAesJiaMiData.setText(data);        } catch (Exception e) {            e.printStackTrace();        }    }

/**     * base64解密     */    private void base64Decode() {        if (!TextUtils.isEmpty(tvJiaMiData.getText().toString().trim())) {            String data = new String(Base64.decode(tvJiaMiData.getText().toString().trim().getBytes(), Base64.DEFAULT));            tvJieMiData.setText(data);        }    }

/**     * base64加密     */    private void base64Encrypt() {        //下面是两种方式 加密        //// 在这里使用的是encode方式，返回的是byte类型加密数据，可使用new String转为String类型//        String olderData_base64 = new String(Base64.encode(strOlderData.getBytes(), Base64.DEFAULT));        //// 加密传入的数据是byte类型的，并非使用decode方法将原始数据转二进制，String类型的数据 使用 str.getBytes()即可        String olderData_base64 = Base64.encodeToString(strOlderData.getBytes(), Base64.DEFAULT);        tvJiaMiData.setText(olderData_base64);    }

}

public class AesUtils {    public static String encrypt(String seed, String cleartext) throws Exception {        byte[] rawKey = getRawKey(seed.getBytes());        byte[] result = encrypt(rawKey, cleartext.getBytes());        return toHex(result);    }

public static String decrypt(String seed, String encrypted) throws Exception {        byte[] rawKey = getRawKey(seed.getBytes());        byte[] enc = toByte(encrypted);        byte[] result = decrypt(rawKey, enc);        return new String(result);    }

private static byte[] getRawKey(byte[] seed) throws Exception {        KeyGenerator kgen = KeyGenerator.getInstance("AES");        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");        sr.setSeed(seed);        kgen.init(128, sr); // 192 and 256 bits may not be available        SecretKey skey = kgen.generateKey();        byte[] raw = skey.getEncoded();        return raw;    }

private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");        Cipher cipher = Cipher.getInstance("AES");        cipher.init(Cipher.ENCRYPT_MODE, skeySpec,new IvParameterSpec(new byte[cipher.getBlockSize()]));        byte[] encrypted = cipher.doFinal(clear);        return encrypted;    }

private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");        Cipher cipher = Cipher.getInstance("AES");        cipher.init(Cipher.DECRYPT_MODE, skeySpec,new IvParameterSpec(new byte[cipher.getBlockSize()]));        byte[] decrypted = cipher.doFinal(encrypted);        return decrypted;    }

private static String toHex(String txt) {        return toHex(txt.getBytes());    }    private static String fromHex(String hex) {        return new String(toByte(hex));    }

private static byte[] toByte(String hexString) {        int len = hexString.length()/2;        byte[] result = new byte[len];        for (int i = 0; i < len; i++)            result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2), 16).byteValue();        return result;    }

private static String toHex(byte[] buf) {        if (buf == null)            return "";        StringBuffer result = new StringBuffer(2*buf.length);        for (int i = 0; i < buf.length; i++) {            appendHex(result, buf[i]);        }        return result.toString();    }    private final static String HEX = "0123456789ABCDEF";    private static void appendHex(StringBuffer sb, byte b) {        sb.append(HEX.charAt((b>>4)&0x0f)).append(HEX.charAt(b&0x0f));    }}

经过验证可用