MalformedURLException的android系统中下载一个压缩文件时， [英] MalformedURLException in android when downloading a zip file
本文介绍了MalformedURLException的android系统中下载一个压缩文件时，的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我M下载android系统中的zip，得到了以下错误。
InputStream的连接被抛出空的例外是
java.net.MalformedURLException：协议未找到：www.songspk320.in/128/indian/Don-2-2011-128Kbps(Songs.PK).zip
在与的java.net.URL下。INIT＆GT;（URL.java:273）
在与的java.net.URL下。INIT＆GT;（URL.java:157）
在com.linkezzi.web.DownloadIconSetZIP.openInputStreamConnection（DownloadIconSetZIP.java:73）
在com.linkezzi.web.DownloadIconSetZIP.doInBackground（DownloadIconSetZIP.java:45）
在android.os.AsyncTask $ 2.call（AsyncTask.java:185）
在java.util.concurrent.FutureTask中$ Sync.innerRun（FutureTask.java:306）
在java.util.concurrent.FutureTask.run（FutureTask.java:138）
在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1088）
在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:581）
在java.lang.Thread.run（Thread.java:1019）
code如下。
公共类DownloadIconSetZIP扩展的AsyncTask { 私人文件根= NULL;
私人字符串URL = NULL;
私人文件pathToLinkEziiIconSetRootFolder = NULL;
私人文件toBeExtracted = NULL;
私人的FileOutputStream FOUT = NULL;
私人语境mContext = NULL;
私人的InputStream输入= NULL;
公共DownloadIconSetZIP（上下文mContext，弦乐uriZIP）{ this.url = uriZIP;
this.mContext = mContext;
}
保护对象doInBackground（Object []对象PARAMS）{ 如果（this.url！= NULL）{ 根= Environment.getExternalStorageDirectory（）; 尝试{ Log.e（下载图标集背景，URL =+网址）; openInputStreamConnection（）; Log.e（图标集是从URI下载=，url.toUpperCase（））; pathSetInLocalFileSystem（）; downloadFile（输入）;
}赶上（MalformedURLException的MalformedURLException的）{ malformedURLException.printStackTrace（）; }赶上（例外五）{ e.printStackTrace（）; } } 返回null;
}
私人无效openInputStreamConnection（）抛出IOException异常，
MalformedURLException的{
尝试{
HttpURLConnection的康恩=（HttpURLConnection类）新的URL（网址）.openConnection（）;
// conn.setDoInput（真）;
conn.setConnectTimeout（30000）; //超时10秒
conn.connect（）;
输入= conn.getInputStream（）;
}赶上（MalformedURLException的E）{
e.printStackTrace（）;
} }
私人无效downloadFile（输入的InputStream）抛出IOException
INT BYTECOUNT = 0;
字节[]缓冲区=新的字节[1024];
INT读取动作= -1;
而（（读取动作= input.read（缓冲液））！= - 1）{ fOut.write（缓冲液，0，读取动作）;
BYTECOUNT + =读取动作; }
fOut.flush（）;
fOut.close（）;
} 私人无效pathSetInLocalFileSystem（）抛出FileNotFoundException异常{
pathToLinkEziiIconSetRootFolder = searchFileInThisDirectory（根）; 如果（pathToLinkEziiIconSetRootFolder == NULL）{
pathToLinkEziiIconSetRootFolder =新的文件（root.getAbsolutePath（），LinkEziiIconsets）; 如果（pathToLinkEziiIconSetRootFolder.exists（）及！＆放大器; pathToLinkEziiIconSetRootFolder.mkdir（））{
Log.e（LinkEzii图标集集装箱文件夹中创建，LinkEzii图标集集装箱文件夹中创建）;
}其他{
Log.e（LinkEzii图标集集装箱未创建，LinkEzii图标集集装箱未创建）;
}
} 文件downloadedIconSetFile =新的文件（pathToLinkEziiIconSetRootFolder.getAbsolutePath（），IconSetName来这里......）; 如果（！downloadedIconSetFile.exists（））{
downloadedIconSetFile.mkdir（）;
Log.e（容器中创建的图标集，容器中创建的图标集）;
}
如果（downloadedIconSetFile！= NULL）{
toBeExtracted =新的文件（downloadedIconSetFile图标集拉链Format.zip）;
FOUT =新的FileOutputStream（toBeExtracted）;
} }
私人文件searchFileInThisDirectory（档案文件）抛出NullPointerException异常{ 如果（文件== NULL）{
抛出新的NullPointerException（）;
} 文件[] listFiles = file.listFiles（）; 文件pathToLinkEziiIconSetRootFolder = NULL; 对于（文件searchIT：listFiles）{
如果（file.isDirectory（）及＆放大器; file.getName（）等于（LinkEziiIconsets）。）{
pathToLinkEziiIconSetRootFolder =文件; 返回pathToLinkEziiIconSetRootFolder;
}
} 返回pathToLinkEziiIconSetRootFolder; } 保护无效onCancelled（）{
super.onCancelled（）;
Log.i（下载被取消，下载被取消）;
} 保护无效onPostExecute（对象结果）{
super.onPostExecute（结果）;// DECOM pressing文件
如果（toBeExtracted！= NULL）{//只是为了移动DECOM pressing到回地面主题
新主题（新的Runnable接口（）{ @覆盖
公共无效的run（）{ DECOM pressDownloadedDiagram DECOM pressdDownloadedDiagram =新DECOM pressDownloadedDiagram（toBeExtracted.getPath（），toBeExtracted.getPath（），toBeExtracted）;
DECOM pressdDownloadedDiagram.unzip（）;
toBeExtracted.delete（）;
}
}）。开始（）; Toast.makeText（mContext图标设置成功下载，Toast.LENGTH_LONG）.show（）; }其他{
Toast.makeText（mContext，错误而下载图！，Toast.LENGTH_LONG）.show（）;
Log.e（一些错误Occure边下载边图，一些错误Occure在下载图）;
} Log.i（下载成功，下载成功）;
} 在preExecute保护无效（）{
super.on preExecute（）;
Log.i（下载已开始，下载已开始）;
} 保护无效onProgressUpdate（对象[]值）{
super.onProgressUpdate（值）; Log.i（Downlaoding正在进行中，下载过程）;
}
}
解决方案
MalformedURLException的普遍抛出时，有没有附上你必须检查的任何协议是否是系统协议，通过检查：// 为present在你的URL字符串。如果您的网址是具有 WWW 你可以用整个检查 HTTP ：//
查找 HTTP的发生：通过调用// 包含（）方法上的网址字符串。如果你能找到检查他们是否开始字符串调用字符 url.startsWith。（HTTP：//），以确保该异常不能被抛出
如果上述测试通过刚刚加入这一行。
URL =HTTP：//+ URL;
I m download a zip in android and got following errors.
InputStream Connection is null exception thrown is
java.net.MalformedURLException: Protocol not found: www.songspk320.in/128/indian/Don-2-2011-128Kbps(Songs.PK).zip
at java.net.URL.<init>(URL.java:273)
at java.net.URL.<init>(URL.java:157)
at com.linkezzi.web.DownloadIconSetZIP.openInputStreamConnection(DownloadIconSetZIP.java:73)
at com.linkezzi.web.DownloadIconSetZIP.doInBackground(DownloadIconSetZIP.java:45)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Code is Given Below.
public class DownloadIconSetZIP extends AsyncTask {
private File root = null;
private String url = null;
private File pathToLinkEziiIconSetRootFolder = null;
private File toBeExtracted = null;
private FileOutputStream fOut = null;
private Context mContext = null;
private InputStream input = null;
public DownloadIconSetZIP(Context mContext,String uriZIP){
this.url = uriZIP;
this.mContext = mContext;
}
protected Object doInBackground(Object[] params) {
if(this.url != null){
root = Environment.getExternalStorageDirectory();
try {
Log.e("Downloading Iconset in BackGround","URl = "+ url);
openInputStreamConnection();
Log.e("Iconset is Downloading from the URI = ",url.toUpperCase());
pathSetInLocalFileSystem();
downloadFile(input);
}catch(MalformedURLException malformedURLException){
malformedURLException.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
private void openInputStreamConnection() throws IOException,
MalformedURLException {
try {
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
// conn.setDoInput(true);
conn.setConnectTimeout(30000); // timeout 10 secs
conn.connect();
input = conn.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
private void downloadFile(InputStream input) throws IOException {
int byteCount = 0;
byte[] buffer = new byte[1024];
int bytesRead = -1;
while ((bytesRead = input.read(buffer)) != -1) {
fOut.write(buffer, 0, bytesRead);
byteCount += bytesRead;
}
fOut.flush();
fOut.close();
}
private void pathSetInLocalFileSystem() throws FileNotFoundException {
pathToLinkEziiIconSetRootFolder = searchFileInThisDirectory(root);
if(pathToLinkEziiIconSetRootFolder == null){
pathToLinkEziiIconSetRootFolder = new File(root.getAbsolutePath(),"LinkEziiIconsets");
if(!pathToLinkEziiIconSetRootFolder.exists() && pathToLinkEziiIconSetRootFolder.mkdir()){
Log.e("LinkEzii Iconset Container Folder is Created","LinkEzii Iconset Container Folder is Created");
}else{
Log.e("LinkEzii Iconset Container is Not Created","LinkEzii Iconset Container is Not Created");
}
}
File downloadedIconSetFile = new File(pathToLinkEziiIconSetRootFolder.getAbsolutePath(),"IconSetName Comes Here...");
if(!downloadedIconSetFile.exists()){
downloadedIconSetFile.mkdir();
Log.e("Container is Created for Iconset","Container is Created for iconset");
}
if(downloadedIconSetFile!=null){
toBeExtracted = new File(downloadedIconSetFile, "IconSet Zip Format.zip");
fOut = new FileOutputStream(toBeExtracted);
}
}
private File searchFileInThisDirectory(File file) throws NullPointerException {
if(file == null){
throw new NullPointerException();
}
File[] listFiles = file.listFiles();
File pathToLinkEziiIconSetRootFolder = null;
for(File searchIT: listFiles){
if(file.isDirectory() && file.getName().equals("LinkEziiIconsets")){
pathToLinkEziiIconSetRootFolder = file;
return pathToLinkEziiIconSetRootFolder;
}
}
return pathToLinkEziiIconSetRootFolder;
}
protected void onCancelled() {
super.onCancelled();
Log.i("Downloading is Cancelled","Download is Cancelled");
}
protected void onPostExecute(Object result) {
super.onPostExecute(result);
// Decompressing the File
if(toBeExtracted != null){
// Just to Move the Decompressing to the Back Ground Thread
new Thread(new Runnable() {
@Override
public void run() {
DecompressDownloadedDiagram decompressdDownloadedDiagram = new DecompressDownloadedDiagram(toBeExtracted.getPath(), toBeExtracted.getPath(),toBeExtracted);
decompressdDownloadedDiagram.unzip();
toBeExtracted.delete();
}
}).start();
Toast.makeText(mContext, "Icons Set is Successfully Downloaded", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(mContext, "Error! while downloading diagram", Toast.LENGTH_LONG).show();
Log.e("Some Error Occure While Downloading Diagram","Some Error Occure While Downloading Diagram");
}
Log.i("Downloading is Successful","Downloading is Successful");
}
protected void onPreExecute() {
super.onPreExecute();
Log.i("Downloading is Starting","Downloading is Starting");
}
protected void onProgressUpdate(Object[] values) {
super.onProgressUpdate(values);
Log.i("Downlaoding is in Progress","Downloading is in Progress");
}
}
解决方案
MalformedURLException generally thrown when there is no protocol attached with the system you have to check whether any protocol is that by checking whether :// is present in your URL string.. If your url is having www you can check it with whole http://.
Find occurrence of http:// by calling contains() method on your url string. If you can find check whether they are starting characters of string call url.startsWith("http://") to make sure this exception can not be thrown.
If none of above tests pass just add this line.
url = "http://"+url;
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