Android--下载zip压缩文件并解压

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,在此记录一下下载zip文件并直接解压的方法,直接上代码。

源码下载:http://download.csdn.net/detail/chaoyu168/9717756

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" />

调用:

//下载
DownLoaderTask task = new DownLoaderTask("url", Environment.getExternalStorageDirectory().getPath()+"/app/", context);
task.execute();
//解压
ZipExtractorTask task1 = new ZipExtractorTask(Environment.getExternalStorageDirectory().getPath()+"/app/a.zip", 
                Environment.getExternalStorageDirectory().getPath()+"/app1/", context, true);
task1.execute();

    原文作者:chaoyu168
    原文地址: https://blog.csdn.net/chaoyu168/article/details/53787157
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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