android HttpUrlConnection发送post和参数get请求
我需要一些帮助,从我的android应用程序发送HttpUrlConnection。到目前为止,我是用一个基本的Http客户机来完成这项工作的。但问题是,当我从服务器接收到一个大数据流时,我的应用程序崩溃,出现outofmemory异常。这就是为什么我做了一项研究,发现HttpUrlConnection可以让我将流分成一个片段。那么,有谁能帮我发送参数并从服务器获取响应呢 我之前使用的代码是:android HttpUrlConnection发送post和参数get请求,android,httpclient,httpurlconnection,Android,Httpclient,Httpurlconnection,我需要一些帮助,从我的android应用程序发送HttpUrlConnection。到目前为止,我是用一个基本的Http客户机来完成这项工作的。但问题是,当我从服务器接收到一个大数据流时,我的应用程序崩溃,出现outofmemory异常。这就是为什么我做了一项研究,发现HttpUrlConnection可以让我将流分成一个片段。那么,有谁能帮我发送参数并从服务器获取响应呢 我之前使用的代码是: httpclient = new DefaultHttpClient(
httpclient = new DefaultHttpClient();
httppost = new HttpPost("http://www.rpc.your_nightmare.com");
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
String deviceId = tm.getDeviceId();
String resolution = Integer.toString(getWindow().getWindowManager().getDefaultDisplay().getWidth())+ "x" +
Integer.toString(getWindow().getWindowManager().getDefaultDisplay().getHeight());
String version = "Android " + Build.VERSION.RELEASE;
String locale = getResources().getConfiguration().locale.toString();
String clientApiVersion = null;
PackageManager pm = this.getPackageManager();
PackageInfo packageInfo = pm.getPackageInfo(this.getPackageName(), 0);
clientApiVersion = packageInfo.versionName;
hash = getAuthHash();
String timestampSQL = "SELECT dbTimestamp FROM users";
Cursor cursor = systemDbHelper.executeSQLQuery(timestampSQL);
if(cursor.getCount()==0){
Log.i("Cursor","TimeStamp Cursor Empty!");
} else if(cursor.getCount()>0){
cursor.moveToFirst();
timeStamp = cursor.getString(cursor.getColumnIndex("dbTimestamp"));
}
TelephonyManager tMgr =(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
phoneNumber = tMgr.getLine1Number();
Log.i("Phone","Phone Number : "+phoneNumber);
postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("debug_data","1"));
postParameters.add(new BasicNameValuePair("client_auth_hash", hash));
postParameters.add(new BasicNameValuePair("timestamp", timeStamp));
postParameters.add(new BasicNameValuePair("mobile_phone", phoneNumber));
postParameters.add(new BasicNameValuePair("deactivate_collections",Integer.toString(index)));
postParameters.add(new BasicNameValuePair("client_api_ver", clientApiVersion));
postParameters.add(new BasicNameValuePair("set_locale", locale));
postParameters.add(new BasicNameValuePair("device_os_type", version));
postParameters.add(new BasicNameValuePair("device_sync_type", "14"));
postParameters.add(new BasicNameValuePair("device_identification_string", version));
postParameters.add(new BasicNameValuePair("device_identificator", deviceId));
postParameters.add(new BasicNameValuePair("device_resolution", resolution));
httppost.setEntity(new UrlEncodedFormEntity(postParameters));
HttpResponse response = httpclient.execute(httppost);
Log.w("Response ","Status line : "+ response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
InputStream stream2 = entity.getContent();
int nRead;
byte[] data = new byte[8*1024];
while ((nRead = stream2.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
return buffer.toByteArray();
以下是使用HttpURLConnecion与web服务器建立连接的方法:
System.setProperty("http.keepAlive", "false");
connection = (HttpURLConnection) new URL(url).openConnection();
connection.setDoOutput(true);
connection.setConnectTimeout(5000); // miliseconds
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Charset", charset);
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded;charset=" + charset);
OutputStream output = null;
try {
output = connection.getOutputStream();
output.write(query.getBytes(charset));
} catch (IOException e) {
e.printStackTrace();
} finally {
if (output != null)
try {
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
int status = ((HttpURLConnection) connection).getResponseCode();
Log.d("", "Status : " + status);
for (Entry<String, List<String>> header : connection
.getHeaderFields().entrySet()) {
Log.d("Headers",
"Headers : " + header.getKey() + "="
+ header.getValue());
}
InputStream response = new BufferedInputStream(
connection.getInputStream());
int bytesRead = -1;
byte[] buffer = new byte[30 * 1024];
while ((bytesRead = response.read(buffer)) > 0 && stopThread) {
byte[] buffer2 = new byte[bytesRead];
System.arraycopy(buffer, 0, buffer2, 0, bytesRead);
// buffer2 is you chunked response
}
connection.disconnect();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
我看到你仍然面临着同样的问题,所以我认为你错过了我们之前提供的一些东西,或者是错误地使用了它。你能提供完整的代码让我们检查一下吗。问题是响应太大,我无法将其转换为字符串并解析它。我需要找到一种方法将其分解,正如我在android文档中看到的,httpurlconnection是一种更好的方法,但我有点难以理解如何发布同步参数等。有多少响应是巨大的?很多人都在使用与我们建议的服务器响应相同的技术。实际上,每次都不一样……在某些情况下,我只能获得1-2MB,在其他一些情况下,我可以获得100MB,这取决于用户需要什么。如果你想看,我可以向你展示我的全部代码。如果你想看,有代码:
System.setProperty("http.keepAlive", "false");
connection = (HttpURLConnection) new URL(url).openConnection();
connection.setDoOutput(true);
connection.setConnectTimeout(5000); // miliseconds
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Charset", charset);
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded;charset=" + charset);
OutputStream output = null;
try {
output = connection.getOutputStream();
output.write(query.getBytes(charset));
} catch (IOException e) {
e.printStackTrace();
} finally {
if (output != null)
try {
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
int status = ((HttpURLConnection) connection).getResponseCode();
Log.d("", "Status : " + status);
for (Entry<String, List<String>> header : connection
.getHeaderFields().entrySet()) {
Log.d("Headers",
"Headers : " + header.getKey() + "="
+ header.getValue());
}
InputStream response = new BufferedInputStream(
connection.getInputStream());
int bytesRead = -1;
byte[] buffer = new byte[30 * 1024];
while ((bytesRead = response.read(buffer)) > 0 && stopThread) {
byte[] buffer2 = new byte[bytesRead];
System.arraycopy(buffer, 0, buffer2, 0, bytesRead);
// buffer2 is you chunked response
}
connection.disconnect();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}