Android Upload file

Uploading files to the server is a common thing in Android development. Just make a summary of what is now useful in the project.

• 1. Using HttpURLConnection, this method is cumbersome and requires you to simulate the form submission yourself.
• 2. Using the Httpmime library implementation, this method is based on the httpclient. It is better to use httpurlconnection after 2.3 than to use httpclient.
• 3. Implement using the Okhttp library.

The following gives the implementation in turn:

I. Implementation with HttpURLConnection

/** * Upload file * * @param path * @param fileList */public static void Usehttpurlconnectionuploadfile (f Inal String Path, final arraylist<string> fileList) {NE W Thread (New Runnable () {@Override public void run () {try {URL                    url = new URL (path);                    HttpURLConnection conn = (httpurlconnection) URL. OpenConnection ();                    Conn.setrequestmethod ("POST");                    Conn.setrequestproperty ("Connection", "keep-alive");                    Conn.setrequestproperty ("Cache-control", "max-age=0"); Conn.setrequestproperty ("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/                    webp,*/*;q=0.8 ");  Conn.setrequestproperty ("User-agent", "mozilla/5.0" (Windows NT 6.1; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/31.0.1650.63 Safari ");                    Conn.setrequestproperty ("accept-encoding", "GZIP,DEFLATE,SDCH");                    Conn.setrequestproperty ("Accept-language", "zh-cn,zh;q=0.8");                    Conn.setrequestproperty ("Charsert", "UTF-8"); Conn.setrequestproperty ("Content-type", "multipart/form-data;                    boundary= "+ startboundary);                    OutputStream out = new DataOutputStream (conn. Getoutputstream ());                    StringBuffer SB = null;                        for (int i = 0; i < filelist.size (); i++) {File File = new file (Filelist.get (i));                        SB = new StringBuffer ();                        Sb.append (boundary); Sb.append ("Content-disposition:form-data; Name=\ "File" + i + "\";       Filename=\ "" + file.getname ()                         + "\" \ r \ n ");                        Sb.append ("content-type:application/octet-stream\r\n\r\n");                        Out.write (Sb.tostring (). GetBytes ()); DataInputStream InputStream = new DataInputStream (new FileInputStream, New File (filelist.ge                        T (i)));                        int bytes = 0;                        byte buffer[] = new byte[1024];                        while ((bytes = inputstream.read (buffer))! =-1) {out.write (buffer, 0, bytes);                        } out.write ("\ r \ n". GetBytes ());                    Inputstream.close ();                    } out.write (Endboundary.getbytes ());                    Out.flush ();                    Out.close ();                    Define the BufferedReader input stream to read the response of the URL//the server-side input stream must be obtained or the uploaded file is unsuccessful (this is true when PHP is the server-side language, not in other languages) BufferedReader reader = new BufferedreAder (New InputStreamReader (Conn.getinputstream ()));                    String line = null;                    while (line = Reader.readline ())! = null) {System.out.println (line);                }} catch (Malformedurlexception e) {e.printstacktrace ();                } catch (IOException e) {e.printstacktrace ();    }}). Start (); }

Second, the use of httpmime implementation

/** * Upload file * * @param URL * @param files * * public static void Usehttpmimeuploadfile (Final String u            RL, final arraylist<string> files) {New Thread (new Runnable () {                @Override public void Run () {HttpClient HttpClient = new Defaulthttpclient ();                HttpPost HttpPost = new HttpPost (URL);                Multipartentitybuilder build = Multipartentitybuilder.create ();                    for (String file:files) {Filebody bin = new Filebody (new file);                    Stringbody comment = null;                    try {comment = new Stringbody ("commit");                    } catch (Unsupportedencodingexception e) {e.printstacktrace ();                    } build.addpart (file, bin);                Build.addpart ("comment", comment); } httpentity REqentity = Build.build ();                Httppost.setentity (reqentity);                    try {HttpResponse HttpResponse = Httpclient.execute (HttpPost); if (Httpresponse.getstatusline (). Getstatuscode () = = () {httpentity resentity = Httpresponse.gete                        Ntity ();                    System.out.println (entityutils.tostring (resentity));                    } else {System.out.println ("Connection error!!!!");                }} catch (Clientprotocolexception e) {e.printstacktrace ();                } catch (IOException e) {e.printstacktrace ();                } finally {Httpclient.getconnectionmanager (). Shutdown ();    }}). Start (); }

Third, the use of okhttp implementation

/* * Copyright (C) Square, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * You are not a use this file except in compliance with the License. * Obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * unless required by appli Cable law or agreed into writing, software * Distributed under the License is distributed on a "as is" BASIS, * without Warranties or CONDITIONS of any KIND, either express OR implied. * See the License for the specific language governing permissions and * limitations under the License. */package Com.hotkeyfinance.finance.network;import Com.squareup.okhttp.mediatype;import Com.squareup.okhttp.multipartbuilder;import Com.squareup.okhttp.okhttpclient;import com.squareup.okhttp.Request; Import Com.squareup.okhttp.requestbody;import Com.squareup.okhttp.response;import Java.io.file;import Java.io.ioexception;public Final class Postmultipart {/** * The Imgur client ID for OkHttp recipes. If You' re using Imgur for anything * other than running these examples, request your own client id!    * Https://api.imgur.com/oauth2 */private static final String imgur_client_id = "9199fdef135c122";    Private static final mediatype media_type_png = Mediatype.parse ("Image/png");    Private final Okhttpclient client = new Okhttpclient (); public void run (string url, String filePath) throws Exception {//with the Imgur image upload API as documented at        Https://api.imgur.com/endpoints/image File File = new file (FilePath); Requestbody requestbody = new Multipartbuilder (). Type (multipartbuilder.form). Addformdatapa RT ("title", "Square Logo"). Addformdatapart ("image", File.getname (), Requestbody.cre        Ate (media_type_png, file)). build ();                Request Request = new Request.builder () header ("Authorization", "Client-id" + imgur_client_id) . URL (URL). Post (Requestbody). build ();        Response Response = client.newcall (Request). Execute ();        if (!response.issuccessful ()) throw new IOException ("Unexpected Code" + response);    System.out.println (Response.body (). String ()); }}

Address of the Okhttp library: https://github.com/square/okhttp

Address of the Httpmine library: http://mvnrepository.com/artifact/org.apache.httpcomponents/httpmime

Android Upload file