(Android™) Hash (Digest) a String

Hash the bytes of a string.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    CkStringBuilder sb = new CkStringBuilder();

    sb.Append("Hello World");

    // Hashing algorithms (i.e. digest algorithms) operate on raw bytes.
    // Therefore, we must specify the character encoding (utf-8, utf-16, iso-8859-1, etc.) to be used when hashing.

    // Get the SHA256 hash in hex
    String sha256_hex = sb.getHash("sha256","hex","utf-8");
    Log.i(TAG, "SHA256: " + sha256_hex);

    // Get the SHA384 hash in hex lowercase
    String sha384_hex = sb.getHash("sha384","hex_lower","utf-8");
    Log.i(TAG, "SHA384: " + sha384_hex);

    // Get the SHA512 hash in base64
    String sha512_base64 = sb.getHash("sha512","base64","utf-8");
    Log.i(TAG, "SHA512: " + sha512_base64);

    // Get the SHA1 hash in hex lowercase
    String sha1_hex = sb.getHash("sha1","hex_lower","utf-8");
    Log.i(TAG, "SHA1: " + sha1_hex);

    // Get the CRC8 digest in decimal
    String crc8_decimal = sb.getHash("crc8","decimal","utf-8");
    Log.i(TAG, "CRC8: " + crc8_decimal);

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}