Android™

Add Text Files to a ZIP Using AddString

See more Zip Examples

This example demonstrates how to use the AddString method to add multiple text files directly from string variables into a ZIP archive.

Each string is converted to bytes using the specified character encoding and stored as a separate file entry within the ZIP archive.

This method is useful for dynamically generating small text files such as configuration files, reports, JSON documents, XML, or log files entirely in memory.

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;

    CkZip zip = new CkZip();

    success = zip.NewZip("stringEntries.zip");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    //  Add a README text file.
    String readmeText = "This ZIP archive was created using AddString.";

    success = zip.AddString("docs/readme.txt",readmeText,"utf-8");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    //  Add a JSON configuration file.
    String jsonText = "{ \"server\": \"example.com\", \"port\": 443 }";

    success = zip.AddString("config/settings.json",jsonText,"utf-8");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    //  Add a small XML document.
    String xmlText = "<root><status>OK</status></root>";

    success = zip.AddString("xml/status.xml",xmlText,"utf-8");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    //  Write the ZIP archive to disk and close it.
    success = zip.WriteZipAndClose();
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, "ZIP archive created successfully.");

  }

  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."
  }
}