本节引言

本节和下一节文件下载一样,慎入…现在实际开发涉及文件上传不会自己写上传代码,一般
会集成第三网络库来做图片上传,比如android-async-http,okhttp等,另外还有七牛也提供
了下载和上传的API,喜欢的可以去官网查看相关的API文档!本节的话有兴趣看看就好!


1.项目用到的图片上传的关键方法:

思前想后,还是决定先贴下公司项目中用到的图片上传的核心方法,这里用到一个第三方的库:
android-async-http.jar,自己到github下下这个库~然后调用一下下面的方法即可,自己改下url!

上传图片的核心方法如下:

private void sendImage(Bitmap bm)
{
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.PNG, 60, stream);
    byte[] bytes = stream.toByteArray();
    String img = new String(Base64.encodeToString(bytes, Base64.DEFAULT));
    AsyncHttpClient client = new AsyncHttpClient();
    RequestParams params = new RequestParams();
    params.add("img", img);
    client.post("http:xxx/postIcon", params, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(int i, Header[] headers, byte[] bytes) {
            Toast.makeText(MainActivity.this, "Upload Success!", Toast.LENGTH_LONG).show();

        }
        @Override
        public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {
            Toast.makeText(MainActivity.this, "Upload Fail!", Toast.LENGTH_LONG).show();
        }
    });
}

2.使用HttpConnection上传文件:

简直卧槽…各种设置,各种麻烦…还是建议用1的方法吧,当然,实在太闲可以看看,
有轮子可用还是先别自己造轮子了…

public class SocketHttpRequester   
{  
    /** 
     * 发送xml数据 
     * @param path 请求地址 
     * @param xml xml数据 
     * @param encoding 编码 
     * @return 
     * @throws Exception 
     */  
    public static byte[] postXml(String path, String xml, String encoding) throws Exception{  
        byte[] data = xml.getBytes(encoding);  
        URL url = new URL(path);  
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
        conn.setRequestMethod("POST");  
        conn.setDoOutput(true);  
        conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding);  
        conn.setRequestProperty("Content-Length", String.valueOf(data.length));  
        conn.setConnectTimeout(5 * 1000);  
        OutputStream outStream = conn.getOutputStream();  
        outStream.write(data);  
        outStream.flush();  
        outStream.close();  
        if(conn.getResponseCode()==200){  
            return readStream(conn.getInputStream());  
        }  
        return null;  
    }  
      
    /** 
     * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能: 
     *   

* @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,
* 因为它会指向手机模拟器,你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param file 上传文件
*/
public static boolean post(String path, Map params, FormFile[] files) throws Exception
{
//数据分隔线
final String BOUNDARY = “—————————7da2137580612″;
//数据结束标志”—————————7da2137580612–”
final String endline = “–” + BOUNDARY + “–/r/n”;

//下面两个for循环都是为了得到数据长度参数,依据表单的类型而定
//首先得到文件类型数据的总长度(包括文件分割线)
int fileDataLength = 0;
for(FormFile uploadFile : files)
{
StringBuilder fileExplain = new StringBuilder();
fileExplain.append(“–“);
fileExplain.append(BOUNDARY);
fileExplain.append(“/r/n”);
fileExplain.append(“Content-Disposition: form-data;name=/””+ uploadFile.getParameterName()+”/”;filename=/””+ uploadFile.getFilname() + “/”/r/n”);
fileExplain.append(“Content-Type: “+ uploadFile.getContentType()+”/r/n/r/n”);
fileExplain.append(“/r/n”);
fileDataLength += fileExplain.length();
if(uploadFile.getInStream()!=null){
fileDataLength += uploadFile.getFile().length();
}else{
fileDataLength += uploadFile.getData().length;
}
}
//再构造文本类型参数的实体数据
StringBuilder textEntity = new StringBuilder();
for (Map.Entry entry : params.entrySet())
{
textEntity.append(“–“);
textEntity.append(BOUNDARY);
textEntity.append(“/r/n”);
textEntity.append(“Content-Disposition: form-data; name=/””+ entry.getKey() + “/”/r/n/r/n”);
textEntity.append(entry.getValue());
textEntity.append(“/r/n”);
}

//计算传输给服务器的实体数据总长度(文本总长度+数据总长度+分隔符)
int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;

URL url = new URL(path);
//默认端口号其实可以不写
int port = url.getPort()==-1 ? 80 : url.getPort();
//建立一个Socket链接
Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);
//获得一个输出流(从Android流到web)
OutputStream outStream = socket.getOutputStream();
//下面完成HTTP请求头的发送
String requestmethod = “POST “+ url.getPath()+” HTTP/1.1/r/n”;
outStream.write(requestmethod.getBytes());
//构建accept
String accept = “Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*/r/n”;
outStream.write(accept.getBytes());
//构建language
String language = “Accept-Language: zh-CN/r/n”;
outStream.write(language.getBytes());
//构建contenttype
String contenttype = “Content-Type: multipart/form-data; boundary=”+ BOUNDARY+ “/r/n”;
outStream.write(contenttype.getBytes());
//构建contentlength
String contentlength = “Content-Length: “+ dataLength + “/r/n”;
outStream.write(contentlength.getBytes());
//构建alive
String alive = “Connection: Keep-Alive/r/n”;
outStream.write(alive.getBytes());
//构建host
String host = “Host: “+ url.getHost() +”:”+ port +”/r/n”;
outStream.write(host.getBytes());
//写完HTTP请求头后根据HTTP协议再写一个回车换行
outStream.write(“/r/n”.getBytes());
//把所有文本类型的实体数据发送出来
outStream.write(textEntity.toString().getBytes());

//把所有文件类型的实体数据发送出来
for(FormFile uploadFile : files)
{
StringBuilder fileEntity = new StringBuilder();
fileEntity.append(“–“);
fileEntity.append(BOUNDARY);
fileEntity.append(“/r/n”);
fileEntity.append(“Content-Disposition: form-data;name=/””+ uploadFile.getParameterName()+”/”;filename=/””+ uploadFile.getFilname() + “/”/r/n”);
fileEntity.append(“Content-Type: “+ uploadFile.getContentType()+”/r/n/r/n”);
outStream.write(fileEntity.toString().getBytes());
//边读边写
if(uploadFile.getInStream()!=null)
{
byte[] buffer = new byte[1024];
int len = 0;
while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1)
{
outStream.write(buffer, 0, len);
}
uploadFile.getInStream().close();
}
else
{
outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
}
outStream.write(“/r/n”.getBytes());
}
//下面发送数据结束标志,表示数据已经结束
outStream.write(endline.getBytes());
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
//读取web服务器返回的数据,判断请求码是否为200,如果不是200,代表请求失败
if(reader.readLine().indexOf(“200”)==-1)
{
return false;
}
outStream.flush();
outStream.close();
reader.close();
socket.close();
return true;
}

/**
* 提交数据到服务器
* @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,因为它会指向手机模拟器,你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param file 上传文件
*/
public static boolean post(String path, Map params, FormFile file) throws Exception
{
return post(path, params, new FormFile[]{file});
}
/**
* 提交数据到服务器
* @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,因为它会指向手机模拟器,你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param encode 编码
*/
public static byte[] postFromHttpClient(String path, Map params, String encode) throws Exception
{
//用于存放请求参数
List formparams = new ArrayList();
for(Map.Entry entry : params.entrySet())
{
formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, encode);
HttpPost httppost = new HttpPost(path);
httppost.setEntity(entity);
//看作是浏览器
HttpClient httpclient = new DefaultHttpClient();
//发送post请求
HttpResponse response = httpclient.execute(httppost);
return readStream(response.getEntity().getContent());
}
/**
* 发送请求
* @param path 请求路径
* @param params 请求参数 key为参数名称 value为参数值
* @param encode 请求参数的编码
*/
public static byte[] post(String path, Map params, String encode) throws Exception
{
//String params = “method=save&name=”+ URLEncoder.encode(“老毕”, “UTF-8”)+ “&age=28&”;//需要发送的参数
StringBuilder parambuilder = new StringBuilder(“”);
if(params!=null && !params.isEmpty())
{
for(Map.Entry entry : params.entrySet())
{
parambuilder.append(entry.getKey()).append(“=”)
.append(URLEncoder.encode(entry.getValue(), encode)).append(“&”);
}
parambuilder.deleteCharAt(parambuilder.length()-1);
}
byte[] data = parambuilder.toString().getBytes();
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置允许对外发送请求参数
conn.setDoOutput(true);
//设置不进行缓存
conn.setUseCaches(false);
conn.setConnectTimeout(5 * 1000);
conn.setRequestMethod(“POST”);
//下面设置http请求头
conn.setRequestProperty(“Accept”, “image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*”);
conn.setRequestProperty(“Accept-Language”, “zh-CN”);
conn.setRequestProperty(“User-Agent”, “Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)”);
conn.setRequestProperty(“Content-Type”, “application/x-www-form-urlencoded”);
conn.setRequestProperty(“Content-Length”, String.valueOf(data.length));
conn.setRequestProperty(“Connection”, “Keep-Alive”);

//发送参数
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(data);//把参数发送出去
outStream.flush();
outStream.close();
if(conn.getResponseCode()==200)
{
return readStream(conn.getInputStream());
}
return null;
}

/**
* 读取流
* @param inStream
* @return 字节数组
* @throws Exception
*/
public static byte[] readStream(InputStream inStream) throws Exception
{
ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = -1;
while( (len=inStream.read(buffer)) != -1)
{
outSteam.write(buffer, 0, len);
}
outSteam.close();
inStream.close();
return outSteam.toByteArray();
}
}

偶然发现一篇以前转载的,可以搭配着上面的看看…:使用HttpConnection上传mp3文件


本节小结:

本节还是直接无视吧…关于文件上传等进阶部分直接教大家用第三方算了,项目中需要用到
第三方直接复制1的代码,导入个android-async-http即可!

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