(Android™) Create a ZIP Archive with a Top-Level Directory Using PathPrefix

This example demonstrates how to use the PathPrefix property to ensure that all files in a ZIP archive are stored beneath a common top-level directory.

The example recursively adds files from:

c:/zipTest/directory_name

And stores them in the ZIP archive beneath:

directory_name/

For example, the local filesystem file:

c:/zipTest/directory_name/hello.txt

Will be stored in the ZIP archive as:

directory_name/hello.txt

This is useful when creating ZIP archives that should extract into a single parent directory rather than directly into the current extraction location.

The example also demonstrates that methods such as AppendFiles initially add references to filesystem files, and that the actual file reading and compression occur later when WriteZipAndClose is called.

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;

    CkZip zip = new CkZip();

    // Initialize the Zip object and set the output filename.
    // The .zip file is not created until WriteZip or WriteZipAndClose is called.
    success = zip.NewZip("qa_output/test.zip");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    // Prepend "directory_name/" to each ZIP entry added after this point.
    // 
    // For example, a file found at:
    // 
    //     c:/zipTest/directory_name/hello.txt
    // 
    // Will be stored in the ZIP as:
    // 
    //     directory_name/hello.txt
    // 
    // This is useful when you want the files to unzip beneath a specific
    // top-level directory.
    zip.put_PathPrefix("directory_name/");

    // Recursively add references to all files beneath:
    // 
    //     c:/zipTest/directory_name
    // 
    // AppendFiles does not immediately read or compress the files.
    // It adds references to files in the local filesystem.
    // The referenced files are read and compressed when WriteZipAndClose is called.
    boolean recurse = true;

    success = zip.AppendFiles("c:/zipTest/directory_name/*",recurse);
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

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

    Log.i(TAG, "Success.");

  }

  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."
  }
}