Android Unzip Example

Android Unzip the in SD-Card
Below i write the code  for Download zip file from application server and Unzip to SD-Card. I Hope it will useful for you.

Activity Code: 

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/**

* @author vijayakumar

*/

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.URL;

import java.net.URLConnection;

import java.util.Calendar;

import java.util.Enumeration;

import java.util.Random;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import android.app.Activity;

import android.app.ProgressDialog;

import android.os.AsyncTask;

import android.os.Bundle;

import android.os.Environment;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class AndroidQAActivity extends Activity {

private static Random random = new Random(Calendar.getInstance().getTimeInMillis());

private ProgressDialog mProgressDialog;

String unzipLocation = Environment.getExternalStorageDirectory() + "/Extract location Folder Name/Extracted Downloaded File";

String zipFile =Environment.getExternalStorageDirectory() "+/download zip file";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// setContentView(R.layout.main);

DownloadMapAsync mew = new DownloadMapAsync();

mew.execute("Here Your Zip File Url");

}

class DownloadMapAsync extends AsyncTask<String, String, String> {

String result ="";

@Override

protected void onPreExecute() {

super.onPreExecute();

mProgressDialog = new ProgressDialog(AndroidQAActivity.this);

mProgressDialog.setMessage("Downloading Zip File..");

mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

mProgressDialog.setCancelable(false);

mProgressDialog.show();

}

@Override

protected String doInBackground(String... aurl) {

int count;

try {

URL url = new URL(aurl[0]);

URLConnection conexion = url.openConnection();

conexion.connect();

int lenghtOfFile = conexion.getContentLength();

InputStream input = new BufferedInputStream(url.openStream());

OutputStream output = new FileOutputStream(zipFile);

byte data[] = new byte[1024];

long total = 0;

while ((count = input.read(data)) != -1) {

total += count;

publishProgress(""+(int)((total*100)/lenghtOfFile));

output.write(data, 0, count);

}

output.close();

input.close();

result = "true";

} catch (Exception e) {

result = "false";

}

return null;

}

protected void onProgressUpdate(String... progress) {

Log.d("ANDRO_ASYNC",progress[0]);

mProgressDialog.setProgress(Integer.parseInt(progress[0]));

}

@Override

protected void onPostExecute(String unused) {

mProgressDialog.dismiss();

if(result.equalsIgnoreCase("true")){

try {

unzip();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

else{

}

}

}

public void unzip() throws IOException {

mProgressDialog = new ProgressDialog(AndroidQAActivity.this);

mProgressDialog.setMessage("Please Wait...Extracting zip file ... ");

mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);

mProgressDialog.setCancelable(false);

mProgressDialog.show();

new UnZipTask().execute(zipFile, unzipLocation);

}

private class UnZipTask extends AsyncTask<String, Void, Boolean> {

@SuppressWarnings("rawtypes")

@Override

protected Boolean doInBackground(String... params) {

String filePath = params[0];

String destinationPath = params[1];

File archive = new File(filePath);

try {

ZipFile zipfile = new ZipFile(archive);

for (Enumeration e = zipfile.entries(); e.hasMoreElements();) {

ZipEntry entry = (ZipEntry) e.nextElement();

unzipEntry(zipfile, entry, destinationPath);

}

UnzipUtil d = new UnzipUtil(zipFile, unzipLocation);

d.unzip();

} catch (Exception e) {

return false;

}

return true;

}

@Override

protected void onPostExecute(Boolean result) {

mProgressDialog.dismiss();

}

private void unzipEntry(ZipFile zipfile, ZipEntry entry,

String outputDir) throws IOException {

if (entry.isDirectory()) {

createDir(new File(outputDir, entry.getName()));

return;

}

File outputFile = new File(outputDir, entry.getName());

if (!outputFile.getParentFile().exists()) {

createDir(outputFile.getParentFile());

}

// Log.v("", "Extracting: " + entry);

BufferedInputStream inputStream = new BufferedInputStream(zipfile.getInputStream(entry));

BufferedOutputStream outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));

try {

} finally {

outputStream.flush();

outputStream.close();

inputStream.close();

}

}

private void createDir(File dir) {

if (dir.exists()) {

return;

}

if (!dir.mkdirs()) {

throw new RuntimeException("Can not create dir " + dir);

}

}}

}

Screen Shot

DOWNLOAD SOURCE CODE HERE