Android zip file Download and decompression instance _android

Download:
Downloadertask.java

Copy Code code as follows:

Package com.johnny.testzipanddownload;

Import Java.io.BufferedInputStream;
Import Java.io.BufferedOutputStream;
Import Java.io.File;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import java.net.MalformedURLException;
Import Java.net.URL;
Import java.net.URLConnection;

Import Android.app.ProgressDialog;
Import Android.content.Context;
Import Android.content.DialogInterface;
Import Android.content.DialogInterface.OnCancelListener;
Import Android.os.AsyncTask;
Import Android.util.Log;

public class Downloadertask extends Asynctask<void, Integer, long> {
Private final String TAG = "Downloadertask";
Private URL Murl;
Private File Mfile;
Private ProgressDialog Mdialog;
private int mprogress = 0;
Private Progressreportingoutputstream Moutputstream;
Private context Mcontext;
Public Downloadertask (String url,string out,context context) {
Super ();
if (context!=null) {
Mdialog = new ProgressDialog (context);
Mcontext = context;
}
else{
Mdialog = null;
}

try {
murl = new URL (URL);
String fileName = new File (Murl.getfile ()). GetName ();
Mfile = new File (out, fileName);
LOG.D (TAG, "out=" +out+ ", name=" +filename+ ", murl.getfile () =" +murl.getfile ());
catch (Malformedurlexception e) {
TODO auto-generated Catch block
E.printstacktrace ();
}

}

@Override
protected void OnPreExecute () {
TODO auto-generated Method Stub
Super.onpreexecute ();
if (mdialog!=null) {
Mdialog.settitle ("Downloading ...");
Mdialog.setmessage (Mfile.getname ());
Mdialog.setprogressstyle (progressdialog.style_horizontal);
Mdialog.setoncancellistener (New Oncancellistener () {

@Override
public void OnCancel (Dialoginterface dialog) {
TODO auto-generated Method Stub
Cancel (true);
}
});
Mdialog.show ();
}
}

@Override
Protected Long doinbackground (Void ... params) {
TODO auto-generated Method Stub
return download ();
}

  @Override
 protected void onprogressupdate (Integer ... values) {
  //TODO auto-generated method Stub
  //super.onprogressupdate (values);
  if (mdialog==null)
   return;
  if (values.length>1) {
   int contentlength = values[1];
   if (contentlength==-1) {
    mdialog.setindeterminate (true);
&NBSP;&NBSP;&NBSP}
   else{
    mdialog.setmax (contentLength);
&NBSP;&NBSP;&NBSP}
  }
  else{
   mdialog.setprogress (values[0). Intvalue ());
  }
 }

@Override
protected void OnPostExecute (Long result) {
TODO auto-generated Method Stub
Super.onpostexecute (result);
if (mdialog!=null&&mdialog.isshowing ()) {
Mdialog.dismiss ();
}
if (iscancelled ())
Return
((mainactivity) mcontext). Showunzipdialog ();
}

Private long Download () {
URLConnection connection = null;
int bytescopied = 0;
try {
Connection = Murl.openconnection ();
int length = Connection.getcontentlength ();
if (mfile.exists () &&length = = Mfile.length ()) {
LOG.D (TAG, "file" +mfile.getname () + "already exits!!");
return 0l;
}
Moutputstream = new Progressreportingoutputstream (mfile);
Publishprogress (0,length);
Bytescopied =copy (Connection.getinputstream (), moutputstream);
if (bytescopied!=length&&length!=-1) {
LOG.E (TAG, "Download incomplete bytescopied=" +bytescopied+ ", Length" +length);
}
Moutputstream.close ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
return bytescopied;
}
private int copy (InputStream input, outputstream output) {
byte[] buffer = new BYTE[1024*8];
Bufferedinputstream in = new Bufferedinputstream (input, 1024*8);
Bufferedoutputstream out = new Bufferedoutputstream (output, 1024*8);
int count =0,n=0;
try {
while ((n=in.read (buffer, 0, 1024*8))!=-1) {
Out.write (buffer, 0, N);
Count+=n;
}
Out.flush ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}finally{
try {
Out.close ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
try {
In.close ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
}
return count;
}
Private Final class Progressreportingoutputstream extends fileoutputstream{

Public progressreportingoutputstream (file file)
Throws FileNotFoundException {
Super (file);
TODO auto-generated Constructor stub
}

@Override
public void write (byte[] buffer, int byteoffset, int byteCount)
Throws IOException {
TODO auto-generated Method Stub
Super.write (buffer, byteoffset, byteCount);
Mprogress + = ByteCount;
Publishprogress (mprogress);
}

}
}

Extract:
Zipextractortask. java

Copy Code code as follows:

Package com.johnny.testzipanddownload;

Import Java.io.BufferedInputStream;
Import Java.io.BufferedOutputStream;
Import Java.io.File;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import java.util.Enumeration;
Import Java.util.zip.ZipEntry;
Import java.util.zip.ZipException;
Import Java.util.zip.ZipFile;

Import Android.app.ProgressDialog;
Import Android.content.Context;
Import Android.content.DialogInterface;
Import Android.content.DialogInterface.OnCancelListener;
Import Android.os.AsyncTask;
Import Android.util.Log;

public class Zipextractortask extends Asynctask<void, Integer, long> {
Private final String TAG = "Zipextractortask";
Private final File Minput;
Private final File Moutput;
Private final ProgressDialog Mdialog;
private int mprogress = 0;
Private final context Mcontext;
Private Boolean Mreplaceall;
Public Zipextractortask (String, String, context, Boolean ReplaceAll) {
Super ();
Minput = new File (in);
Moutput = new File (out);
if (!moutput.exists ()) {
if (!moutput.mkdirs ()) {
LOG.E (TAG, "Failed to make Directories:" +moutput.getabsolutepath ());
}
}
if (context!=null) {
Mdialog = new ProgressDialog (context);
}
else{
Mdialog = null;
}
Mcontext = context;
Mreplaceall = ReplaceAll;
}
@Override
Protected Long doinbackground (Void ... params) {
TODO auto-generated Method Stub
return unzip ();
}

@Override
protected void OnPostExecute (Long result) {
TODO auto-generated Method Stub
Super.onpostexecute (result);
if (mdialog!=null&&mdialog.isshowing ()) {
Mdialog.dismiss ();
}
if (iscancelled ())
Return
}
@Override
protected void OnPreExecute () {
TODO auto-generated Method Stub
Super.onpreexecute ();
if (mdialog!=null) {
Mdialog.settitle ("extracting");
Mdialog.setmessage (Minput.getname ());
Mdialog.setprogressstyle (progressdialog.style_horizontal);
Mdialog.setoncancellistener (New Oncancellistener () {

@Override
public void OnCancel (Dialoginterface dialog) {
TODO auto-generated Method Stub
Cancel (true);
}
});
Mdialog.show ();
}
}
@Override
protected void Onprogressupdate (Integer ... values) {
TODO auto-generated Method Stub
Super.onprogressupdate (values);
if (mdialog==null)
Return
if (values.length>1) {
int max=values[1];
Mdialog.setmax (max);
}
Else
Mdialog.setprogress (Values[0].intvalue ());
}
Private long unzip () {
Long extractedsize = 0L;
enumeration<zipentry> entries;
ZipFile zip = null;
try {
Zip = new ZipFile (minput);
Long uncompressedsize = getoriginalsize (Zip);
Publishprogress (0, (int) uncompressedsize);

Entries = (enumeration<zipentry>) zip.entries ();
while (Entries.hasmoreelements ()) {
ZipEntry entry = Entries.nextelement ();
if (Entry.isdirectory ()) {
Continue
}
File Destination = new file (Moutput, Entry.getname ());
if (!destination.getparentfile (). exists ()) {
LOG.E (TAG, "make=" +destination.getparentfile (). GetAbsolutePath ());
Destination.getparentfile (). Mkdirs ();
}
if (destination.exists () &&mcontext!=null&&!mreplaceall) {

}
Progressreportingoutputstream OutStream = new Progressreportingoutputstream (destination);
Extractedsize+=copy (Zip.getinputstream (entry), OutStream);
Outstream.close ();
}
catch (Zipexception e) {
TODO auto-generated Catch block
E.printstacktrace ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}finally{
try {
Zip.close ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
}

return extractedsize;
}

Private long Getoriginalsize (ZipFile file) {
enumeration<zipentry> entries = (enumeration<zipentry>) file.entries ();
Long originalsize = 0l;
while (Entries.hasmoreelements ()) {
ZipEntry entry = Entries.nextelement ();
if (Entry.getsize () >=0) {
Originalsize+=entry.getsize ();
}
}
return originalsize;
}

private int copy (InputStream input, outputstream output) {
byte[] buffer = new BYTE[1024*8];
Bufferedinputstream in = new Bufferedinputstream (input, 1024*8);
Bufferedoutputstream out = new Bufferedoutputstream (output, 1024*8);
int count =0,n=0;
try {
while ((n=in.read (buffer, 0, 1024*8))!=-1) {
Out.write (buffer, 0, N);
Count+=n;
}
Out.flush ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}finally{
try {
Out.close ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
try {
In.close ();
catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
}
return count;
}

Private Final class Progressreportingoutputstream extends fileoutputstream{

Public progressreportingoutputstream (file file)
Throws FileNotFoundException {
Super (file);
TODO auto-generated Constructor stub
}

@Override
public void write (byte[] buffer, int byteoffset, int byteCount)
Throws IOException {
TODO auto-generated Method Stub
Super.write (buffer, byteoffset, byteCount);
Mprogress + = ByteCount;
Publishprogress (mprogress);
}

}
}

Main activity
Mainactivity.java

Copy Code code as follows:

Package com.johnny.testzipanddownload;

Import Android.os.Bundle;
Import android.os.Environment;
Import android.app.Activity;
Import Android.app.AlertDialog;
Import Android.content.DialogInterface;
Import Android.content.DialogInterface.OnClickListener;
Import Android.util.Log;
Import Android.view.Menu;

public class Mainactivity extends activity {

Private final String tag= "mainactivity";
@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);

LOG.D (TAG, "environment.getexternalstoragedirectory () =" +environment.getexternalstoragedirectory ());
LOG.D (TAG, "Getcachedir (). GetAbsolutePath () =" +getcachedir (). GetAbsolutePath ());

Showdownloaddialog ();
Dozipextractorwork ();
Dodownloadwork ();
}

@Override
public boolean Oncreateoptionsmenu (Menu menu) {
Inflate the menu; This adds items to the action bar if it is present.
Getmenuinflater (). Inflate (R.menu.main, menu);
return true;
}

private void Showdownloaddialog () {
New Alertdialog.builder (this). Settitle ("confirmation")
. Setmessage ("Do you want to download?) ")
. Setpositivebutton ("Yes", new Onclicklistener () {

@Override
public void OnClick (Dialoginterface dialog, int which) {
TODO auto-generated Method Stub
LOG.D (TAG, "OnClick 1 =" +which);
Dodownloadwork ();
}
})
. Setnegativebutton ("No", new Onclicklistener () {

@Override
public void OnClick (Dialoginterface dialog, int which) {
TODO auto-generated Method Stub
LOG.D (TAG, "OnClick 2 =" +which);
}
})
. Show ();
}

public void Showunzipdialog () {
New Alertdialog.builder (this). Settitle ("confirmation")
. Setmessage ("Do you unpack?) ")
. Setpositivebutton ("Yes", new Onclicklistener () {

@Override
public void OnClick (Dialoginterface dialog, int which) {
TODO auto-generated Method Stub
LOG.D (TAG, "OnClick 1 =" +which);
Dozipextractorwork ();
}
})
. Setnegativebutton ("No", new Onclicklistener () {

@Override
public void OnClick (Dialoginterface dialog, int which) {
TODO auto-generated Method Stub
LOG.D (TAG, "OnClick 2 =" +which);
}
})
. Show ();
}

public void Dozipextractorwork () {
Zipextractortask task = new Zipextractortask ("/storage/usb3/system.zip", "/storage/emulated/legacy/", this, true);
Zipextractortask task = new Zipextractortask ("/storage/emulated/legacy/testzip.zip", "/storage/emulated/legacy/", this, true);
Task.execute ();
}

private void Dodownloadwork () {
Downloadertask task = new Downloadertask ("Http://192.168.9.155/johnny/testzip.zip", "/storage/emulated/legacy/", this);
Downloadertask task = new Downloadertask ("http://192.168.9.155/johnny/test.h264", Getcachedir (). GetAbsolutePath () + "/", this);
Task.execute ();
}

}