Android实现下载zip压缩文件并解压的方法（附源码）

前言

其实在网上有很多介绍下载文件或者解压zip文件的文章，但是两者结合的不多，所以这篇文章在此记录一下下载zip文件并直接解压的方法，直接上代码，文末有源码下载。

下载：

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); 
   } 
   else{ 
    mdialog.setmax(contentlength); 
   } 
  } 
  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); 
  } 
   
 } 
} 

解压：

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 in, string out, context 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); 
  } 
   
 } 
} 

权限：

<uses-permission android:name="android.permission.internet" /> 
 <uses-permission android:name="android.permission.access_network_state" /> 
 <!-- 创建和删除文件 --> 
 <uses-permission android:name="android.permission.mount_unmount_filesystems" /> 
 <!-- 写文件 --> 
 <uses-permission android:name="android.permission.read_external_storage" /> 
 <uses-permission android:name="android.permission.write_external_storage" /> 
 <uses-permission android:name="android.permission.read_phone_state" /> 
 <uses-permission android:name="android.permission.vibrate" /> 
 <uses-permission android:name="android.permission.read_apn_settings" /> 
 <uses-permission android:name="android.permission.restart_packages"/> 
 
 <!-- 统计 --> 
 <uses-permission android:name="android.permission.access_wifi_state" /> 
 <uses-permission android:name="android.permission.access_network_state" /> 
 <uses-permission android:name="android.permission.read_phone_state" /> 
 <uses-permission android:name="android.permission.read_logs" /> 
 <uses-permission android:name="android.permission.wake_lock" /> 
 <uses-permission android:name="android.permission.change_configuration" /> 

源码下载：点击这里

总结

以上就是这篇文章的全部内容了，希望这篇文章对各位android开发者们能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对能带来一定的帮助。