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，谢谢大家对我们能带来一定的帮助。