Android™

Unzip Some Files by Iterating over Entries

See more Zip Examples

Demonstrates how to unzip specific files by iterating over entries in a .zip. 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 requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkZip zip = new CkZip();

    // Open a .zip containing:
    // 
    // a1.xml
    // b1.xml
    // c1.xml
    // dir1/a2.xml
    // dir1/c2.xml
    // dir2/dir3/c3.xml

    // We wish to unzip only a1.xml, b1.xml, and c1.xml
    success = zip.OpenZip("qa_data/zips/xml_files.zip");
    if (success == false) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    CkStringBuilder sbFilename = new CkStringBuilder();

    CkZipEntry entry = new CkZipEntry();
    int numEntries = zip.get_NumEntries();
    int i = 0;
    while (i < numEntries) {
        zip.EntryAt(i,entry);

        String entryFilePath = entry.fileName();
        Log.i(TAG, entryFilePath);

        if (entry.get_IsDirectory() == false) {
            sbFilename.SetString(entryFilePath);
            if (sbFilename.Contains("/",false) == false) {
                // Does not contain "/"
                // Unzip to the qa_output directory.
                success = entry.Extract("qa_output");
                if (success == false) {
                    Log.i(TAG, "Failed to unzip " + entryFilePath);
                    }
                else {
                    Log.i(TAG, "Unzipped " + entryFilePath);
                    }

                }

            }

        i = i + 1;
        }


  }

  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."
  }
}