(Android™) Create Empty File and Directory Entries in a ZIP

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This example demonstrates how to use the AddEmpty method to create both empty directory entries and empty file entries within a ZIP archive.

The example creates:

• A truly empty directory named emptyDir
• An empty file named empty.txt located beneath the docs subdirectory

When the ZIP archive is extracted:

• emptyDir will be created as an empty directory.
• docs/empty.txt will be created as an empty file under the docs subdirectory.

It is not necessary to explicitly create the docs directory beforehand. The directory structure implied by the file path is created automatically when extracting.

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

    // Add an empty directory entry named "emptyDir".
    success = zip.AddEmpty(true,"emptyDir");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    // Add an empty file entry named "docs/empty.txt".
    success = zip.AddEmpty(false,"docs/empty.txt");
    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."
  }
}