Android™

Unzip Files Matching a Pattern (such as *.xml)

See more Zip Examples

Example code to unzip Files Matching a Pattern (such as *.xml) 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;

    // This example works with the .zip located at http://www.example-code.com/data/test.zip

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

    // First, let's download the .zip
    CkHttp http = new CkHttp();
    success = http.Download("http://www.example-code.com/data/test.zip","qa_test/test.zip");
    if (success != true) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    CkZip zip = new CkZip();

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

    // Show what's in the .zip by getting the directory as XML.
    String zipContentsXml = zip.getDirectoryAsXML();
    if (zip.get_LastMethodSuccess() != true) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, zipContentsXml);

    // In this case, the contents of our .zip look like this:
    // <?xml version="1.0" encoding="utf-8" ?>
    // <zip_contents>
    //     <dir name="test">
    //         <dir name="abc">
    //             <dir name="123">
    //                 <file>ecc_public.pem</file>
    //                 <file>starfish.jpg</file>
    //             </dir>
    //             <file>comodo-certificates.pem</file>
    //             <file>pigs.xml</file>
    //         </dir>
    //         <file>COMODORSACertificationAuthority.crt</file>
    //         <file>hamlet.xml</file>
    //     </dir>
    // </zip_contents>

    // ------------------------------------------------------------------------
    // If we wish to unzip only .xml files, use "*.xml" for the pattern\
    // Unzip to the "qa_output" directory relative to our current working directory.
    // (You may unzip to an absolute path by passing an absolute path, such as "/someDir" or
    // "C:/someDir", etc.)
    // This will unzip only the .xml files.  The relative directory structure within
    // the .zip will be created in the local filesystem under the unzip directory
    // path passed in the first argument, which in this case is "qa_output".
    int count = zip.UnzipMatching("qa_output","*.xml",true);
    if (count < 0) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, "unzipped " + String.valueOf(count) + " matching file(s).");

    // ------------------------------------------------------------------------
    // If we wish to unzip only files under the "123" directory, we can do this:
    count = zip.UnzipMatching("qa_output2","*/123/*",true);
    if (count < 0) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, "unzipped " + String.valueOf(count) + " matching file(s).");

    // ------------------------------------------------------------------------
    // If no asterisk character is used, then the match must be exact.
    // For example, to unzip "test/hamlet.xml" we must pass the exact path
    // as it is in the .zip.  We cannot just pass "hamlet.xml".
    count = zip.UnzipMatching("qa_output3","test/hamlet.xml",true);
    if (count < 0) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, "unzipped " + String.valueOf(count) + " matching file(s).");

    // ------------------------------------------------------------------------
    // If we want to unzip any file named "hamlet.xml" found in any sub-directory...
    count = zip.UnzipMatching("qa_output4","*/hamlet.xml",true);
    if (count < 0) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    Log.i(TAG, "unzipped " + String.valueOf(count) + " matching file(s).");

  }

  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."
  }
}