(Android™) Compress Text Feed to Binary

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed binary data.

Note: This example requires Chilkat v11.0.0 or greater.

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);

    boolean success = false;

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

    CkBinData bdCompressed = new CkBinData();

    CkCompression compress = new CkCompression();
    compress.put_Algorithm("deflate");
    compress.put_Charset("utf-8");

    CkStringBuilder sbUncompressedChunk = new CkStringBuilder();

    compress.put_FirstChunk(true);
    compress.put_LastChunk(false);

    int i;
    for (i = 0; i <= 24; i++) {
        if (i == 24) {
            compress.put_LastChunk(true);
            }

        sbUncompressedChunk.Clear();
        sbUncompressedChunk.AppendInt(i);
        sbUncompressedChunk.Append(": This is a line of data to be compressed...\r\n");

        compress.CompressSb(sbUncompressedChunk,bdCompressed);

        compress.put_FirstChunk(false);
        }

    // Show the compressed data in hex format:
    Log.i(TAG, "The hex encoded compressed text:");
    Log.i(TAG, bdCompressed.getEncoded("hex"));

    // Now decompress in one call.  It is important to set both FirstChunk and LastChunk = true
    CkBinData bdDecompressed = new CkBinData();
    compress.put_FirstChunk(true);
    compress.put_LastChunk(true);
    success = compress.DecompressBd2(bdCompressed,bdDecompressed);
    if (success == false) {
        Log.i(TAG, compress.lastErrorText());
        return;
        }

    String originalText = bdDecompressed.getString("utf-8");
    Log.i(TAG, originalText);

  }

  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."
  }
}