I have a zipped password protected a video file saved on sd card on android emulator. Now i want to unzip that video file on sd card through code. How can i achieve that? Any help or code? Thanks in advance
Unzip a zipped file on sd card in Android application
google.com/search?q=android+unzip+file –
Hufuf
This question has been asked many times before. It's in the Java library rather than the Android one. See here: #3383496 –
Polymerize
Have a look at ZipInputStream from the Android developer site: developer.android.com/reference/java/util/zip/ZipFile.html –
Bonnell
Kotlin solution here - https://mcmap.net/q/157201/-how-to-unzip-files-programmatically-in-android It uses a File extension. –
Mercator
Possible duplicate of How to unzip files programmatically in Android? –
Mercator
See this method: https://mcmap.net/q/157201/-how-to-unzip-files-programmatically-in-android –
Inflammable
import android.util.Log;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
/**
*
* @author jon
*/
public class Decompress {
private String _zipFile;
private String _location;
public Decompress(String zipFile, String location) {
_zipFile = zipFile;
_location = location;
_dirChecker("");
}
public void unzip() {
try {
FileInputStream fin = new FileInputStream(_zipFile);
ZipInputStream zin = new ZipInputStream(fin);
ZipEntry ze = null;
while ((ze = zin.getNextEntry()) != null) {
Log.v("Decompress", "Unzipping " + ze.getName());
if(ze.isDirectory()) {
_dirChecker(ze.getName());
} else {
FileOutputStream fout = new FileOutputStream(_location + ze.getName());
for (int c = zin.read(); c != -1; c = zin.read()) {
fout.write(c);
}
zin.closeEntry();
fout.close();
}
}
zin.close();
} catch(Exception e) {
Log.e("Decompress", "unzip", e);
}
}
private void _dirChecker(String dir) {
File f = new File(_location + dir);
if(!f.isDirectory()) {
f.mkdirs();
}
}
}
In your case::
String zipFilename = Environment.getExternalStorageDirectory() + "/files.zip";
String unzipLocation = Environment.getExternalStorageDirectory() + "/unzipped/";
Decompress d = new Decompress(zipFilename, unzipLocation);
d.unzip();
Divyesh Thanks for reply. But still i m confused because my zipped file is password protected so how i will match that password to enter in the file? –
Reticulum
Just a complement to your answer, the actual entry read and file writing could be done in chunks for much higher performance instead of byte by byte:
byte[] buffer = new byte[4096]; for (int c = zin.read(buffer); c != -1; c = zin.read(buffer)) { fout.write(buffer, 0, c); }
–
Forsworn @nobre do you think same code works for unzipping or unpacking the expansion APK Expansion Files obb files? –
Luteolin
Here is a Xamarin.Android version: gist.github.com/pauldendulk/18958a610adb50990d96 –
Greenburg
To unpacking the password protected file use this library:
http://www.lingala.net/zip4j/download.php
it is so easy.
ZipFile zipFile = new ZipFile(YourZipFile);
if(zipFile.isEncrypted())
zipFile.setPassword(Password);
zipFile.extractAll(Destination);
This is slightly more cleaner version of Samir's code with using Apache's IOUtils.copy()
for copying files and finally
block. If you have large files in archive then better use IOUtils.copyLarge()
.
import org.apache.commons.io.IOUtils;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class ZipUtils {
public static void unzip(InputStream is, File path) {
checkDir(path);
ZipInputStream zis = null;
FileOutputStream fos = null;
try {
zis = new ZipInputStream(is);
ZipEntry ze;
while ((ze = zis.getNextEntry()) != null) {
File entryFile = new File(path, ze.getName());
if (ze.isDirectory()) {
checkDir(entryFile);
} else {
fos = new FileOutputStream(entryFile);
IOUtils.copy(zis, fos);
fos.close();
fos = null;
}
zis.closeEntry();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (zis != null) {
try {
zis.close();
} catch (IOException ignore) {
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException ignore) {
}
}
}
}
private static void checkDir(File path) {
if (!path.exists()) {
path.mkdirs();
} else if (!path.isDirectory()) {
throw new IllegalArgumentException("Path is not directory");
}
}
}
Other answers not really work on sdcard(Environment.getExternalStorageDirectory() != SDCARD) in kitkat and above. but you can use this code for api 21 and above! for more help to get zipDocumentFile read this :
/**
* @return true->successful
*/
public static Boolean unzip(Context context, DocumentFile zipDocumentFile) {
try {
InputStream inputStream = context.getContentResolver().openInputStream(zipDocumentFile.getUri());
assert inputStream != null;
ZipInputStream zipInputStream = new ZipInputStream(new BufferedInputStream(inputStream, BUFFER_SIZE));
ZipEntry ze;
while ((ze = zipInputStream.getNextEntry()) != null) {
if (ze.isDirectory()) {
String[] paths = ze.getName().split("/");
DocumentFile documentFile = null;
for (String path : paths) {
if (documentFile == null) {
documentFile = zipDocumentFile.getParentFile().findFile(path);
if (documentFile == null)
documentFile = zipDocumentFile.getParentFile().createDirectory(path);
} else {
DocumentFile newDocumentFile = documentFile.findFile(path);
if (newDocumentFile == null) {
documentFile = documentFile.createDirectory(path);
} else {
documentFile = newDocumentFile;
}
}
}
if (documentFile == null || !documentFile.exists())
return false;
} else {
String[] paths = ze.getName().split("/");
//Make Folders
DocumentFile documentFile = null;
for (int i = 0; i < paths.length - 1; i++) {
if (documentFile == null) {
documentFile = zipDocumentFile.getParentFile().findFile(paths[i]);
if (documentFile == null)
documentFile = zipDocumentFile.getParentFile().createDirectory(paths[i]);
} else {
DocumentFile newDocumentFile = documentFile.findFile(paths[i]);
if (newDocumentFile == null) {
documentFile = documentFile.createDirectory(paths[i]);
} else {
documentFile = newDocumentFile;
}
}
}
DocumentFile unzipDocumentFile;
if (documentFile == null) {
unzipDocumentFile = zipDocumentFile.getParentFile().createFile(URLConnection.guessContentTypeFromName(ze.getName()), paths[paths.length - 1]);
} else {
unzipDocumentFile = documentFile.createFile(URLConnection.guessContentTypeFromName(ze.getName()), paths[paths.length - 1]);
}
// unzip the file
OutputStream outputStream = context.getContentResolver().openOutputStream(unzipDocumentFile.getUri());
int read;
byte[] data = new byte[BUFFER_SIZE];
assert outputStream != null;
while ((read = zipInputStream.read(data, 0, BUFFER_SIZE)) != -1)
outputStream.write(data, 0, read);
zipInputStream.closeEntry();
}
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
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