我发现这种方法可以将图像从设备上传到服务器。这一切都很好，但我还想发送一些额外的字符串参数与图像。作为一个菜鸟我发现很难将它们附加到这种方法上。我可以通过url发送字符串参数到目前为止我学到了很多，但我真的想将它们与图像一起发送
public int uploadFile(String sourceFileUri) {
String upLoadServerUri = "http://www.mywebsite.com/web_services/ws_newitem.php";
String fileName = "IMG_TEST.jpg";
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
Log.e("uploadFile", "Source File Does not exist");
return 0;
}
try { // open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
conn = (HttpURLConnection) url.openConnection(); // Open a HTTP
// connection to
// the URL
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\"; filename=\""
+ fileName + "\"" + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available(); // create a buffer of
// maximum size
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response</span> is : "
+ serverResponseMessage + ": " + serverResponseCode);
if (serverResponseCode == 200) {
runOnUiThread(new Runnable() {
public void run() {
tv.setText("File Upload Completed.");
Toast.makeText(UploadToServer.this,
"File Upload Complete.", Toast.LENGTH_SHORT)
.show();
}
});
}
// close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
Toast.makeText(UploadToServer.this, "MalformedURLException",
Toast.LENGTH_SHORT).show();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
Toast.makeText(UploadToServer.this,
"Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
Log.e("Upload file to server Exception",
"Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
}
答案 0 :(得分：2)
尝试此代码，如果您将所需的参数传递给此函数，它将100％工作。
在php上添加$ _post [＆＃34;用户名＆＃34;]，$ _ post [＆＃34;密码＆＃34;]以接收参数
public JSONObject getJSONFromUrl(String url, String username,
String password, String photo_path) {
InputStream is = null;
JSONObject jObj = null;
static String jsonResp = "";
String CONTENT_TYPE_JSON = "application/json";
static String json = "";
Context context;
try {
File file = null;
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
MultipartEntity entity = new MultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE);
if(photo_path != null)
file = new File(photo_path);
//add whatever the parameter you need to send along with image
entity.addPart("username", new StringBody(username));
entity.addPart("password", new StringBody(password));
entity.addPart("file", new FileBody(file));
entity.addPart("filetype",new StringBody("jpeg"));
httpPost.setEntity(entity);
HttpResponse httpResponse = httpClient.execute(httpPost);
int code = httpResponse.getStatusLine().getStatusCode();
if (code != 200) {
Log.d("HTTP response code is:", Integer.toString(code));
return null;
} else {
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (ConnectTimeoutException e) {
return null;
} catch (SocketTimeoutException e) {
return null;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
} catch (ClientProtocolException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
jsonResp = sb.toString();
} catch (Exception e) {
return null;
}
try {
jObj = new JSONObject(jsonResp);
} catch (JSONException e) {
}
return jObj;
}
答案 1 :(得分：0)
尝试以下
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("firstParam", paramValue1));
params.add(new BasicNameValuePair("secondParam", paramValue2));
params.add(new BasicNameValuePair("thirdParam", paramValue3));
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(os, "UTF-8"));
writer.write(getQuery(params));
writer.flush();
writer.close();
os.close();
//...
conn.connect();
答案 2 :(得分：0)
使用loopj库。它支持上传文件和字符串数据。我在我的一个项目中使用过它。