Android zip文件下載和解壓實例
下載：
DownLoaderTask.java
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);
}
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);
}
}
}
解壓：
ZipExtractorTask .java
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 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);
}
}
}
Main Activity
MainActivity.java
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("確認(rèn)")
.setMessage("是否下載？")
.setPositiveButton("是", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Log.d(TAG, "onClick 1 = "+which);
doDownLoadWork();
}
})
.setNegativeButton("否", 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("確認(rèn)")
.setMessage("是否解壓？")
.setPositiveButton("是", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Log.d(TAG, "onClick 1 = "+which);
doZipExtractorWork();
}
})
.setNegativeButton("否", 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();
}
}
相關(guān)文章
餅狀圖是以不同顏色的圓的切片表示的值。下面這篇文章主要給大家介紹了關(guān)于利用kotlin實現(xiàn)一個餅圖的相關(guān)資料，文中通過示例代碼介紹的非常詳細(xì)，需要的朋友可以參考借鑒，下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧。2017-12-12
這篇文章主要給大家介紹了關(guān)于Kotlin中?和!!區(qū)別的相關(guān)資料，文中通過示例代碼介紹的非常詳細(xì)，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧2021-05-05
這篇文章主要介紹了Android AlertDialog的幾種用法詳解,本篇文章通過簡要的案例,講解了該項技術(shù)的了解與使用,以下就是詳細(xì)內(nèi)容,需要的朋友可以參考下2021-08-08
android 傳感器(OnSensorChanged)使用介紹
當(dāng)傳感器的值發(fā)生變化時，例如磁阻傳感器方向改變時會調(diào)用OnSensorChanged(). 當(dāng)傳感器的精度發(fā)生變化時會調(diào)用OnAccuracyChanged()方法2014-11-11
Android仿微信圖片選擇器ImageSelector使用詳解
這篇文章主要為大家詳細(xì)介紹了Android仿微信圖片選擇器ImageSelector的使用方法，具有一定的參考價值，感興趣的小伙伴們可以參考一下2017-12-12
Android根據(jù)不同身份配置APP對應(yīng)的不同模塊方法
今天小編就為大家分享一篇Android根據(jù)不同身份配置APP對應(yīng)的不同模塊方法，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧2018-07-07
Android開發(fā)解決popupWindow重疊報錯問題
今天小編就為大家分享一篇關(guān)于Android開發(fā)解決popupWindow重疊報錯問題的文章，小編覺得內(nèi)容挺不錯的，現(xiàn)在分享給大家，具有很好的參考價值，需要的朋友一起跟隨小編來看看吧2018-10-10
這篇文章主要介紹了Kotlin中常見的符號詳解，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧2020-03-03
Android 6.0調(diào)用相機(jī)圖冊崩潰的完美解決方案
這篇文章主要介紹了Android 6.0調(diào)用相機(jī)圖冊崩潰的完美解決方案,本文介紹的非常詳細(xì)，具有參考借鑒價值，需要的朋友可以參考下2016-09-09
Android中使用AsyncTask實現(xiàn)文件下載以及進(jìn)度更新提示
AsyncTask，它使創(chuàng)建需要與用戶界面交互的長時間運(yùn)行的任務(wù)變得更簡單，本篇文章主要介紹了Android中使用AsyncTask實現(xiàn)文件下載以及進(jìn)度更新提示，有興趣的可以了解一下。2016-12-12