Android™

Extract ZIP Files Without Preserving Directory Paths Using DiscardPaths

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This example demonstrates how to use the DiscardPaths property to extract files from a ZIP archive without recreating the stored directory structure.

When DiscardPaths is set to _TRUE_, all extracted files are written directly into the target extraction directory, and any stored ZIP path information is ignored.

This is useful when:

• Flattening ZIP contents into a single directory
• Ignoring stored subdirectory structures during extraction
• Extracting only the files themselves without recreating folders

Suppose the ZIP archive contains:

docs/readme.txt
docs/manual.pdf
images/logo.png

Normally, extracting the ZIP would create:

output/docs/readme.txt
output/docs/manual.pdf
output/images/logo.png

But when DiscardPaths is set to _TRUE_, the extracted files become:

output/readme.txt
output/manual.pdf
output/logo.png

The stored ZIP directory paths are discarded during extraction.

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();

    //  Open an existing ZIP archive.
    success = zip.OpenZip("example.zip");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    //  Discard stored ZIP paths during extraction.
    //  
    //  When DiscardPaths = true, all files are extracted
    //  directly into the target directory without recreating
    //  the ZIP directory structure.
    zip.put_DiscardPaths(true);

    //  Extract all files to the output directory.
    //  
    //  Even if the ZIP contains:
    //  
    //      docs/readme.txt
    //      docs/manual.pdf
    //      images/logo.png
    //  
    //  The extracted files become:
    //  
    //      c:/output/readme.txt
    //      c:/output/manual.pdf
    //      c:/output/logo.png
    //  
    int numFilesUnzipped = zip.Unzip("c:/output");

    if (numFilesUnzipped < 0) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, "Number of files extracted = " + String.valueOf(numFilesUnzipped));

    zip.CloseZip();

    Log.i(TAG, "Files extracted 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."
  }
}