(Android™) Create a Zip Entirely in Memory

Demonstrates how to create a .zip from in-memory byte data and strings, and to write the .zip to an in-memory image.

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);

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

    CkCrypt2 crypt = new CkCrypt2();
    CkZip zip = new CkZip();

    boolean success = zip.NewZip("test.zip");
    if (success != true) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    // Add the bytes 0x00 0x01 0x02 0x03 ... 0x0F as a file in the .zip
    CkByteData binFileData = new CkByteData();
    success = crypt.Decode("000102030405060708090A0B0C0D0E0F","hex",binFileData);
    CkZipEntry entry = zip.AppendData("binaryData.dat",binFileData);

    // Add the string "Hello World!" to the .zip
    entry = zip.AppendString2("helloWorld.txt","Hello World!","utf-8");

    CkByteData zipFileInMemory = new CkByteData();
    success = zip.WriteToMemory(zipFileInMemory);

    // We could save these files to a file, and it is a valid .zip
    CkFileAccess fac = new CkFileAccess();
    success = fac.WriteEntireFile("test.zip",zipFileInMemory);
    if (success != true) {
        Log.i(TAG, fac.lastErrorText());
        return;
        }

    Log.i(TAG, "Zip Created!");

  }

  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."
  }
}