Android™

Compress Bytes to Base64 (or any other encoding)

See more Compression Examples

Compresses bytes to base64 or any other encoding. Also decompress to return the original. Android™

// 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);

    boolean success = false;

    //  This example assumes the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  First create some binary data to compress.
    CkBinData binData = new CkBinData();

    int i;
    for (i = 1; i <= 16; i++) {
        binData.AppendEncoded("000102030405060708090A0B0C0D0E0F","hex");
        }

    CkCompression compress = new CkCompression();
    compress.put_Algorithm("deflate");
    compress.put_EncodingMode("base64");

    CkByteData uncompressedBytes = new CkByteData();
    success = binData.GetBinary(uncompressedBytes);

    //  Compress and return the compressed bytes in base64 format.
    String compressedBase64 = compress.compressBytesENC(uncompressedBytes);
    Log.i(TAG, "compressed and base64 encoded: " + compressedBase64);

    //  Compress and return in hex format:
    compress.put_EncodingMode("hex");
    String compressedHex = compress.compressBytesENC(uncompressedBytes);
    Log.i(TAG, "compressed and hex encoded: " + compressedHex);

    //  Now decompress..
    CkBinData binData2 = new CkBinData();

    //  Decompress the base64..
    compress.put_EncodingMode("base64");
    success = compress.DecompressBytesENC(compressedBase64,uncompressedBytes);
    binData2.AppendBinary(uncompressedBytes);
    //  Show the uncompressed bytes in hex format:
    Log.i(TAG, binData2.getEncoded("hex"));
    Log.i(TAG, "--");

    //  Decompress the hex..
    compress.put_EncodingMode("hex");
    success = compress.DecompressBytesENC(compressedHex,uncompressedBytes);
    binData2.Clear();
    binData2.AppendBinary(uncompressedBytes);
    //  Show the uncompressed bytes in hex format:
    Log.i(TAG, binData2.getEncoded("hex"));
    Log.i(TAG, "--");

  }

  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."
  }
}