android 一个文件下载的工具类
主类：
/**
* <p>
* Copyright: Copyright (c) 2015
* Company:
* Description: 这里写这个文件是干什么用的
* </p>
* @Title ImgDownloadUtil.java
* @Package c
* @version 1.0
* @author
* @date 2015年9月9日
*/
package com.iptvclient.android.baseclient.startupad;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.Locale;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import com.androidsdk.download.DataDownload;
import com.androidsdk.download.bean.DataAttribute;
import com.androidsdk.http.bean.HttpRequest;
import com.androidsdk.http.bean.HttpRequestParams;
import com.androidsdk.http.bean.HttpResponse;
import com.androidsdk.http.download.IHttpDownloadListener;
import com.iptvclient.android.androidsdk.common.LogEx;
/**
* 下载保存图片的工具类
* @ClassName:ImgDownloadUtil
* @Description: 这里用一句话描述这个类的作用
* @author:
* @date: 2015年9月9日
*
*/
public class ImgFileUtil
{
private static String LOG_TAG = "StartUpAdUtil";
private Context mContext;
private ImgDownloadListener listener;
private String mDownloadUrl;
private String filename = "startupad";
private boolean saveSuccFlag = false;
private String path;
public ImgFileUtil(Context context, ImgDownloadListener l){
this.mContext = context;
this.listener = l;
}
public void stratDownloadImg(String url){
mDownloadUrl = url;
getFilename(mDownloadUrl);
path = mContext.getFilesDir()+"/"+filename;
doDownload(url);
}
private void getFilename(String url){
String urlTemp = url.toLowerCase(Locale.US);
LogEx.i(LOG_TAG, "img url is "+urlTemp);
if (urlTemp.contains(".gif"))
{
filename = filename+".gif";
}else if (urlTemp.contains(".jpg"))
{
filename = filename+".jpg";
}else if (urlTemp.contains(".png"))
{
filename = filename+".png";
}else if (urlTemp.contains(".bmp"))
{
filename = filename+".bmp";
}
LogEx.i(LOG_TAG, "filename = "+filename);
}
private void doDownload(String url){
String downloadUrl = "";
try
{
downloadUrl = URLDecoder.decode(url,"UTF-8");
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
reportSaveFileRet();
return;
}
HttpRequest req = new HttpRequest(HttpRequest.METHOD_GET, downloadUrl);
// 网络请求
DataAttribute attr = new DataAttribute();
attr.setMergeMode(DataDownload.FLAG_MERGE_MODE_LAST);
attr.setUniqueKey(downloadUrl);
HttpRequestParams params = new HttpRequestParams(attr, req, new IHttpDownloadListener()
{
@Override
public void onError(Exception arg0)
{
reportSaveFileRet();
}
@Override
public void onData(HttpRequest datareq, HttpResponse datarsp)
{
do
{
if (null == datarsp)
{
break;
}
LogEx.d(LOG_TAG, " datarsp=" + datarsp);
LogEx.d(LOG_TAG, "file size = " + datarsp.getContentLength()
/ 1024 + "B");
try
{
InputStream in = datarsp.getInputStream();
int ret = saveFile(in);
if (ret ==0)
{
saveSuccFlag = true;
}
in.close();
}
catch (Exception e)
{
e.printStackTrace();
LogEx.w(LOG_TAG, "" + e);
break;
}
}
while (false);
reportSaveFileRet();
}
@Override
public void onCancel(HttpRequest arg0, HttpResponse arg1)
{
reportSaveFileRet();
}
});
DataDownload.getInstance().sendHttpRequest(params);
}
private int saveFile(InputStream in){
if (in == null)
{
LogEx.w(LOG_TAG, "input null.");
return -1;
}
FileOutputStream output = null;
try
{
output = new FileOutputStream(path);
byte[] buffer = new byte[1024];
int len = 0;
while (-1 != (len = in.read(buffer)))
{
output.write(buffer, 0, len);
}
output.flush();
}
catch (Exception e)
{
e.printStackTrace();
LogEx.w(LOG_TAG, "save file Exception " + e);
return -1;
}
finally
{
try
{
output.close();
}
catch (Exception e)
{
e.printStackTrace();
LogEx.w(LOG_TAG, "save file Exception " + e);
return -1;
}
}
return 0;
}
private void reportSaveFileRet(){
if (null == listener)
{
LogEx.w(LOG_TAG, "IStartAdFileListener is null");
return;
}
LogEx.i(LOG_TAG, "IStartAdFileListener is notified");
if (saveSuccFlag)
{
listener.onImgDownloaded(filename);
}else{
listener.onImgDownloadFail();
}
}
public static InputStream readDataFile(Context context, String fileName) {
FileInputStream fis = null;
try {
fis = context.openFileInput(fileName);
} catch (FileNotFoundException e) {
LogEx.w(LOG_TAG, "Read Data_No Such File");
e.printStackTrace();
}
return fis;
}
public static Bitmap File2Bitmap(Context context,String filename) {
String path = context.getFilesDir()+"/"+filename;
return BitmapFactory.decodeFile(path);
}
public interface ImgDownloadListener{
public void onImgDownloaded(String filename);
public void onImgDownloadFail();
}
}HttpRequest类：
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.androidsdk.http.bean;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.http.NameValuePair;
public class HttpRequest {
public static final String METHOD_GET = "Get";
public static final String METHOD_POST = "Post";
public static final String METHOD_PUT = "Put";
String method;
Map<String, String> headerMap;
String url;
List<NameValuePair> params;
String body;
Object extra;
boolean canceled;
boolean bAutoRedirect = true;
public HttpRequest(String method) {
this.method = method;
this.headerMap = new HashMap();
}
public HttpRequest(String method, String url) {
this.method = method;
this.url = url;
this.headerMap = new HashMap();
}
public HttpRequest(String method, String url, List<NameValuePair> params) {
this.method = method;
this.url = url;
this.params = params;
this.headerMap = new HashMap();
}
public HttpRequest(String method, String url, String body) {
this.method = method;
this.url = url;
this.body = body;
this.headerMap = new HashMap();
}
public HttpRequest(String method, String url, List<NameValuePair> params, String body) {
this.method = method;
this.url = url;
this.params = params;
this.body = body;
this.headerMap = new HashMap();
}
public boolean compareTo(Object o) {
if(null == o) {
return false;
} else if(!(o instanceof HttpRequest)) {
return false;
} else {
HttpRequest request = (HttpRequest)o;
if(null == this.method && null != request.getMethod()) {
return false;
} else if(null != this.method && !this.method.equalsIgnoreCase(request.getMethod())) {
return false;
} else if(null == this.url && null != request.getUrl()) {
return false;
} else if(null != this.url && !this.url.equalsIgnoreCase(request.getUrl())) {
return false;
} else if((null != this.params || null == request.getParams()) && (null == this.params || null != request.getParams())) {
if(null == this.params && null == request.getParams()) {
return true;
} else {
ArrayList params1 = new ArrayList();
ArrayList params2 = new ArrayList();
Iterator i$;
NameValuePair nvp;
if(null != this.params && !this.params.isEmpty()) {
i$ = this.params.iterator();
while(i$.hasNext()) {
nvp = (NameValuePair)i$.next();
if(null != nvp && null != nvp.getName() && null != nvp.getValue()) {
params1.add(nvp);
}
}
}
if(null != request.getParams() && !request.getParams().isEmpty()) {
i$ = request.getParams().iterator();
while(i$.hasNext()) {
nvp = (NameValuePair)i$.next();
if(null != nvp && null != nvp.getName() && null != nvp.getValue()) {
params2.add(nvp);
}
}
}
if(params1.size() != params2.size()) {
return false;
} else {
i$ = params1.iterator();
boolean bFound;
do {
if(!i$.hasNext()) {
if(null == this.body && null != request.getBody()) {
return false;
}
if(null != this.body && !this.body.equals(request.getBody())) {
return false;
}
if(this.bAutoRedirect != request.isAutoRedirect()) {
return false;
}
return true;
}
nvp = (NameValuePair)i$.next();
bFound = false;
Iterator i$1 = params2.iterator();
while(i$1.hasNext()) {
NameValuePair nvp2 = (NameValuePair)i$1.next();
if(nvp.getName().equals(nvp2.getName())) {
if(!nvp.getValue().equals(nvp2.getValue())) {
return false;
}
bFound = true;
break;
}
}
} while(bFound);
return false;
}
}
} else {
return false;
}
}
}
public Map<String, String> getHeaderMap() {
return this.headerMap;
}
public void setHeaderMap(Map<String, String> headerMap) {
this.headerMap = headerMap;
}
public void enableAutoRedirect(boolean bEnable) {
this.bAutoRedirect = bEnable;
}
public boolean isAutoRedirect() {
return this.bAutoRedirect;
}
public void addHeader(String name, String value) {
if(null != name && !"".equals(name.trim())) {
if(null != value && !"".equals(value.trim())) {
String newName = name.trim();
String newValue = value.trim();
if(this.headerMap.containsKey(newName)) {
String val = (String)this.headerMap.get(newName);
if(null != val && !"".equals(val)) {
String[] valArray = val.split(";");
String[] sb = valArray;
int len$ = valArray.length;
for(int i$ = 0; i$ < len$; ++i$) {
String v = sb[i$];
if(v.equalsIgnoreCase(newValue)) {
return;
}
}
StringBuilder var11 = new StringBuilder(val);
var11.append(";").append(newValue);
newValue = var11.toString();
}
}
this.headerMap.put(newName, newValue);
}
}
}
public void setHeader(String name, String value) {
if(null != name && !"".equals(name.trim())) {
if(null != value && !"".equals(value.trim())) {
this.headerMap.put(name.trim(), value.trim());
}
}
}
public String getMethod() {
return this.method;
}
public void setMethod(String method) {
this.method = method;
}
public String getUrl() {
return this.url;
}
public void setUrl(String url) {
this.url = url;
}
public List<NameValuePair> getParams() {
return this.params;
}
public void setParams(List<NameValuePair> params) {
this.params = params;
}
public String getBody() {
return this.body;
}
public void setBody(String body) {
this.body = body;
}
public Object getExtra() {
return this.extra;
}
public void setExtra(Object extra) {
this.extra = extra;
}
public boolean isCanceled() {
return this.canceled;
}
public void setCanceled(boolean canceled) {
this.canceled = canceled;
}
}DataAttribute接口：
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.androidsdk.download.bean;
public class DataAttribute {
int mergeMode;
int concurrentNum;
String uniqueKey;
public DataAttribute() {
}
public int getMergeMode() {
return this.mergeMode;
}
public void setMergeMode(int mergeMode) {
this.mergeMode = mergeMode;
}
public int getConcurrentNum() {
return this.concurrentNum;
}
public void setConcurrentNum(int concurrentNum) {
this.concurrentNum = concurrentNum;
}
public String getUniqueKey() {
return this.uniqueKey;
}
public void setUniqueKey(String uniqueKey) {
this.uniqueKey = uniqueKey;
}
}HttpRequestParams接口：
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.androidsdk.http.bean;
import com.androidsdk.download.bean.DataAttribute;
import com.androidsdk.http.bean.HttpAttribute;
import com.androidsdk.http.bean.HttpRequest;
import com.androidsdk.http.download.IHttpDownloadListener;
public class HttpRequestParams {
DataAttribute attr;
HttpAttribute httpAttr;
HttpRequest req;
IHttpDownloadListener listener;
public HttpRequestParams(DataAttribute attr, HttpRequest req, IHttpDownloadListener listener) {
this.attr = attr;
this.req = req;
this.listener = listener;
}
public HttpRequestParams(DataAttribute attr, HttpAttribute httpAttr, HttpRequest req, IHttpDownloadListener listener) {
this.attr = attr;
this.httpAttr = httpAttr;
this.req = req;
this.listener = listener;
}
public DataAttribute getAttr() {
return this.attr;
}
public HttpAttribute getHttpAttr() {
return this.httpAttr;
}
public void setHttpAttr(HttpAttribute httpAttr) {
this.httpAttr = httpAttr;
}
public HttpRequest getReq() {
return this.req;
}
public IHttpDownloadListener getListener() {
return this.listener;
}
public void setListener(IHttpDownloadListener listener) {
this.listener = listener;
}
}IHttpDownloadListener回调接口：
package com.androidsdk.http.download;
import com.androidsdk.http.bean.HttpRequest;
import com.androidsdk.http.bean.HttpResponse;
public interface IHttpDownloadListener {
void onError(Exception var1);
void onData(HttpRequest var1, HttpResponse var2);
void onCancel(HttpRequest var1, HttpResponse var2);
}