java - Download Zip file in Android returns Corrupt file -
i'm trying make application in java downloads zip file, unzips download folder on android device. problem when program downloads it, zip file downloads corrupted , has nothing inside and, of course, unzipped folder empty. have 3 main classes "download file", "unzip", , of course "mainactivity". here are:
mainactivity:
package com.nautgames.xecta.app; import android.os.bundle; import android.support.v7.app.actionbaractivity; import android.view.menu; import android.view.menuitem; //chat bot library import org.alicebot.ab.chat; import org.alicebot.ab.bot; import android.widget.edittext; import java.io.file; import android.view.view; import android.widget.button; import android.os.environment; import android.widget.textview; import android.widget.toast; import android.app.progressdialog; public class mainactivity extends actionbaractivity { button clickdownload; textview input; string dpath = environment.getexternalstoragedirectory().getpath() ; private progressdialog mprogressdialog; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); clickdownload = (button)findviewbyid(r.id.btn_download); } //edittext medit = (edittext)findviewbyid(r.id.edittext1); public void buttononclick(view v) { input = (textview) findviewbyid(r.id.edittext1); string dbpath = environment.getexternalstoragedirectory().getabsolutepath() + "/download/ab"; button button=(button) v; //creating bot string botname="xecta"; string path= dbpath; bot xecta = new bot(botname, path); chat chatsession = new chat(xecta); string request = input.gettext().tostring(); string response = chatsession.multisentencerespond(request); ((button) v).settext(response); } /** * button starts download unzip. */ public void onclickdownload(view v) { button clickdownload = (button) v; string dpath = environment.getexternalstoragedirectory().getabsolutepath() + "/download"; ((button) v).settext("downloading"); //to download zip //url string url = "http://download1642.mediafire.com/hn64kc18pafg/ojajp9o26scdbwd/files.zip"; //path save string savepath = dpath + "/files"; //name save string savename = "xecta.zip"; downloadfile download = new downloadfile(); download.downloadfile(url, savepath, savename); //to unzip files string zipfile = dpath + "/files/files"; string unziplocation = dpath + "/files"; unzip d = new unzip(zipfile, unziplocation); d.unzip(); } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.main, menu); return true; } @override public boolean onoptionsitemselected(menuitem item) { // handle action bar item clicks here. action bar // automatically handle clicks on home/up button, long // specify parent activity in androidmanifest.xml. int id = item.getitemid(); if (id == r.id.action_settings) { return true; } return super.onoptionsitemselected(item); } } downloadfile:
package com.nautgames.xecta.app; import android.os.bundle; import android.support.v7.app.actionbaractivity; import android.widget.button; import java.io.file; import java.io.fileoutputstream; import java.io.inputstream; import java.net.url; import java.net.urlconnection; public class downloadfile extends actionbaractivity{ button download; string file_download_connect = "connecting..."; string file_download_update = "downloading"; string file_download_complete = "complete!"; string file_download_error = "error downloading"; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); download = (button)findviewbyid(r.id.btn_download); } public void downloadfile(final string url, final string savepath, final string savename) { new thread(new runnable() { public void run() { try { //download.settext(file_download_connect); url sourceurl = new url(url); urlconnection conn = sourceurl.openconnection(); conn.connect(); inputstream inputstream = conn.getinputstream(); int filesize = conn.getcontentlength(); file savefilepath = new file(savepath); if (!savefilepath.exists()) { savefilepath.mkdirs(); } file savefile = new file(savepath+savename); if (savefile.exists()) { savefile.delete(); } savefile.createnewfile(); fileoutputstream outputstream = new fileoutputstream( savepath+savename, true); byte[] buffer = new byte[1024]; int readcount = 0; int readnum = 0; int prevpercent = 0; while (readcount < filesize && readnum != -1) { readnum = inputstream.read(buffer, 0, readnum); if (readnum > -1) { outputstream.write(buffer); readcount = readcount + readnum; int percent = (int) (readcount * 100 / filesize); if (percent > prevpercent) { system.out.print(percent); prevpercent = percent; } } } outputstream.flush(); outputstream.close(); inputstream.close(); //thread.sleep(50); //download.settext(file_download_complete); } catch (exception e) { //download.settext(file_download_error); } } }).start(); } } unzip:
package com.nautgames.xecta.app; 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; public class unzip { private string _zipfile; private string _location; public unzip(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()); (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(); } } } btw running android studio (preview) 0.4.6 in advance.
update still not working, looking answer.
update got working now.
here working code lets see..
mainactivity.java
import android.app.activity; import android.os.bundle; import android.os.environment; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; public class mainactivity extends activity { private button button; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); button=(button)findviewbyid(r.id.button1); button.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub utils.createdir(environment.getexternalstoragedirectory().tostring(),"downloads"); utils.createdir(environment.getexternalstoragedirectory().tostring()+"/downloads", "files"); string unziplocation = environment.getexternalstoragedirectory() +"/"+"downloads"+"/"+"files"+"/"; string zipfile =environment.getexternalstoragedirectory() +"/"+"downloads"+"/"+"files"+"."+"zip"; string url="https://eventfo.com.au/index.php/userapi/api/eventdetaildownload/eventid/162/accesskey/534ccbcc10ab2/deviceid/85d2a504b2be7af4/devicetype/android"; try { new utils().downloadeventdata(mainactivity.this,zipfile, unziplocation, url); } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } } }); } } unziputil.java
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; public class unziputil { private string _zipfile; private string _location; public unziputil(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()); // (int c = zin.read(); c != -1; c = zin.read()) { // fout.write(c); byte[] buffer = new byte[8192]; int len; while ((len = zin.read(buffer)) != -1) { fout.write(buffer, 0, len); } fout.close(); // } 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(); } } } utils.java
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.httpurlconnection; import java.net.url; import java.security.cert.certificateexception; import java.security.cert.x509certificate; import java.util.enumeration; import java.util.zip.zipentry; import java.util.zip.zipfile; import javax.net.ssl.hostnameverifier; import javax.net.ssl.httpsurlconnection; import javax.net.ssl.sslcontext; import javax.net.ssl.sslsession; import javax.net.ssl.trustmanager; import javax.net.ssl.x509trustmanager; import android.annotation.suppresslint; import android.app.alertdialog; import android.app.progressdialog; import android.content.context; import android.content.dialoginterface; import android.graphics.color; import android.os.asynctask; import android.util.log; import android.view.gravity; import android.widget.textview; public class utils { public static void createdir(string path,string dirname) { string newfolder = "/"+dirname; file mynewfolder = new file(path + newfolder); mynewfolder.mkdir(); } public void downloadeventdata(context context,string zipfile,string unziplocation,string url) throws ioexception { try { new downloadmapasync(context,zipfile,unziplocation).execute(url); } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } } private class downloadmapasync extends asynctask<string, string, string> { string result =""; context context; string zipfile; string unziplocation; private progressdialog progressdialog; string string; public downloadmapasync(context context,string zipfile,string unziplocation) { // todo auto-generated constructor stub this.context=context; this.zipfile=zipfile; this.unziplocation=unziplocation; } @override protected void onpreexecute() { super.onpreexecute(); progressdialog = new progressdialog(context); progressdialog.setmessage("downloading zip file.."); progressdialog.setprogressstyle(progressdialog.style_horizontal); progressdialog.setcancelable(false); progressdialog.show(); } @override protected string doinbackground(string... aurl) { int count; httpurlconnection http = null; try { url url = new url(aurl[0]); if (url.getprotocol().tolowercase().equals("https")) { trustallhosts(); httpsurlconnection https = (httpsurlconnection) url.openconnection(); https.sethostnameverifier(do_not_verify); http = https; } else { http = (httpurlconnection) url.openconnection(); } http.connect(); if (http.getresponsecode()==200) { int lenghtoffile = http.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"; } else if (http.getresponsecode()==401) { result = "false"; string= "download limit exceed."; } else { result = "false"; string=http.getresponsemessage(); } } catch (exception e) { e.printstacktrace(); result = "false"; try { if (http.getresponsecode()==401) { string= "download failed"; } else { string=e.tostring(); } } catch (ioexception e1) { // todo auto-generated catch block e1.printstacktrace(); } } return result; } protected void onprogressupdate(string... progress) { log.d("andro_async",progress[0]); progressdialog.setprogress(integer.parseint(progress[0])); } @override protected void onpostexecute(string unused) { progressdialog.dismiss(); if(result.equalsignorecase("true")) { try { unzip(context,zipfile,unziplocation); } catch (ioexception e) { // todo auto-generated catch block e.printstacktrace(); } } else { customalert(context, string); } } } @suppresslint("newapi") public void customalert(context context,string msgstring) { alertdialog.builder alertdialog2 = new alertdialog.builder(context,alertdialog.theme_device_default_light); textview title = new textview(context); title.settext("message"); title.setpadding(10, 10, 10, 10); title.setgravity(gravity.center); title.settextcolor(color.black); title.settextsize(20); alertdialog2.setcustomtitle(title); textview msg = new textview(context); msg.settext(msgstring); msg.setpadding(10, 10, 10, 10); msg.setgravity(gravity.center); msg.settextsize(18); msg.settextcolor(color.black); alertdialog2.setview(msg); alertdialog2.setpositivebutton("ok", new dialoginterface.onclicklistener() { public void onclick(dialoginterface dialog, int which) { dialog.cancel(); } }); alertdialog2.show(); } public void unzip(context context,string zipfile,string unziplocation) throws ioexception { new unziptask(context,zipfile).execute(unziplocation); } private class unziptask extends asynctask<string, void, boolean> { context context; string zipfile; progressdialog progressdialog; public unziptask(context context,string zipfile) { // todo auto-generated constructor stub this.context=context; this.zipfile=zipfile; } @override protected void onpreexecute() { super.onpreexecute(); progressdialog = new progressdialog(context); progressdialog.setmessage("please wait...extracting zip file ... "); progressdialog.setprogressstyle(progressdialog.style_spinner); progressdialog.setcancelable(false); progressdialog.show(); } protected boolean doinbackground(string... params) { string filepath = zipfile; string destinationpath = params[0]; file archive = new file(filepath); try { zipfile zipfile = new zipfile(archive); (@suppresswarnings("rawtypes") enumeration e = zipfile.entries(); e.hasmoreelements();) { zipentry entry = (zipentry) e.nextelement(); unzipentry(zipfile, entry, destinationpath); } unziputil d = new unziputil(zipfile,params[0]); d.unzip(); } catch (exception e) { e.printstacktrace(); return false; } return true; } @override protected void onpostexecute(boolean result) { progressdialog.dismiss(); file file=new file(zipfile); file.delete(); customalert(context,"unzipping completed"); } 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()); } bufferedinputstream inputstream = new bufferedinputstream(zipfile.getinputstream(entry)); bufferedoutputstream outputstream = new bufferedoutputstream(new fileoutputstream(outputfile)); try { } { outputstream.flush(); outputstream.close(); inputstream.close(); } } public void createdir(file dir) { if (dir.exists()) { return; } if (!dir.mkdirs()) { throw new runtimeexception("can not create dir " + dir); } } } final static hostnameverifier do_not_verify = new hostnameverifier() { public boolean verify(string hostname, sslsession session) { return true; } }; private static void trustallhosts() { // create trust manager not validate certificate chains trustmanager[] trustallcerts = new trustmanager[] { new x509trustmanager() { public java.security.cert.x509certificate[] getacceptedissuers() { return new java.security.cert.x509certificate[] {}; } public void checkclienttrusted(x509certificate[] chain, string authtype) throws certificateexception { } public void checkservertrusted(x509certificate[] chain, string authtype) throws certificateexception { } } }; // install all-trusting trust manager try { sslcontext sc = sslcontext.getinstance("tls"); sc.init(null, trustallcerts, new java.security.securerandom()); httpsurlconnection .setdefaultsslsocketfactory(sc.getsocketfactory()); } catch (exception e) { e.printstacktrace(); } } } manifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.downloadzipunzip" android:versioncode="1" android:versionname="1.0" > <uses-sdk android:minsdkversion="8" android:targetsdkversion="18" /> <uses-permission android:name="android.permission.internet" /> <uses-permission android:name="android.permission.write_external_storage" /> <application android:allowbackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/apptheme" > <activity android:name="com.example.downloadzipunzip.mainactivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.main" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> </application> </manifest> hope code you..
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