I am having difficulty trying to get the body of the HTTP response from the string. So according to my code, I should have response from the PHP page in the string called "responseString" however because this is in an ASynchTask, I can not access that string anywhere else, so how can I receive the string?
For example, I would like to shoot this string into a text view for testing purposes, how can I do that? Am I reading the code incorrectly? Is the response I am getting not being put into that string?
Here is my code:
class RequestTask extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else{
//Closes the connection.
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (ClientProtocolException e) {
//TODO Handle problems..
} catch (IOException e) {
//TODO Handle problems..
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
}
}
I am using the following to execute:
new RequestTask().execute("http://www.mywebsite.com/android/registercheck.php?first=" + first2 + "&last=" + last2 + "&dispname=" + display2 + "&email=" + email2 + "&password=" + password2 );
after executing the doInBackground the onPostExecute will launch directly, and there you can update the UI so since you are returning responseString, then in onPostExecute put it in a TextView
The return of doInBackgound is the arugment of onPostExecute so the String result is your responseString.
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
tv.setText(result);
}
I think your problem don't solved yet.so,
for Log or Toast use following code:
class RequestTask extends AsyncTask<String, String, String>{
String responseString = "";
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
try {
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else{
//Closes the connection.
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (ClientProtocolException e) {
//TODO Handle problems..
} catch (IOException e) {
//TODO Handle problems..
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Log.d("Result is", responseString );
Toast.makeText(YourClass.this , responseString , Toast.LENGTH_SHORT).show();
}
}
Related
I am working on POST JSON data to server. It is working fine with a tutorial this link but it is not working with this with some of the required data changes. Is there anything related to Javaservlet and PHP links , as the first link is designed using Javasevlet and the other is in PHP ?
public static String POST(String url)
{
InputStream inputStream = null;
String result = "";
try {
org.apache.http.client.HttpClient httpClient=new DefaultHttpClient();
HttpPost httpPost=new HttpPost(url);
String json = "";
JSONObject jsonObject=new JSONObject();
/*JSONArray jsonArray=jsonObject.getJSONArray("object");
JSONObject jsonObject2=jsonArray.getJSONObject(10);*/
jsonObject.putOpt("id",2);
jsonObject.putOpt("address","myaddress");
json=jsonObject.toString();
StringEntity se=new StringEntity(json);
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
HttpResponse httpResponse=httpClient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
// 10. convert inputstream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (JSONException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private class HttpAsyncTask extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... urls) {
// person = new PersonLocator();
// person.setAddresS(myLocationText.getText().toString());
return POST(urls[0]);
}
// onPostExecute displays the results of the AsyncTask.
#Override
protected void onPostExecute(String result) {
Toast.makeText(getBaseContext(), "Data Sent!", Toast.LENGTH_LONG).show();
}
}
Thanks for the help in advance
I am trying to upload a audio file to my webserver. But don't know how to read the the response. Here is the very simplified test.php:
<?php
echo 'I want to see this in the Toast';
?>
fff And here is my onClick that must send the file to the webserver and get a response:
public void send(View v){
Uri uri = new Uri.Builder().scheme("http").authority("sub.domain.nl").path("test.php")
.appendQueryParameter("action", "sendMessage")
.appendQueryParameter("idto", "18")
.appendQueryParameter("idfrom", "36")
.appendQueryParameter("type", "audio")
.build();
String urlString = uri.toString();
new SendAudioTask().execute(urlString);
}
private class SendAudioTask extends AsyncTask<String, Integer, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(String... params) {
String url = params[0];
File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),
"/audio.3gpp");
HttpResponse response = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
InputStreamEntity reqEntity = new InputStreamEntity(
new FileInputStream(file), -1);
reqEntity.setContentType("binary/octet-stream");
reqEntity.setChunked(true);
httppost.setEntity(reqEntity);
response = httpclient.execute(httppost);
} catch (Exception e) {
publishProgress(1);
}
return response.toString();
}
#Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
Toast.makeText(MainActivity.this, "Dev message: = " + values[0], Toast.LENGTH_SHORT).show();
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
}
}
Result.toString() in the onPostExecute() is
org.apache.http.message.basicHttpRespons#43b4cc68
If toString() is the right way to read the response. What is wrong with my code? My code doesn't execute the publishProgress.
HttpEntity entity = httpResponse.getEntity();
InputStream is = entity.getContent();
String result = convertStreamToString(is);
private static String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append((line + "\n"));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
change
return response.toString();
to
return EntityUtils.toString(response.getEntity());
So what getEntity() does,
getEntity()
Obtains the message entity of this response, if any.
I am using the following guide demonstrated by Konstantin Burov on a Stackoverflow post (Make an HTTP request with android):
First of all, request a permission to access network, add following to your manifest:
<uses-permission android:name="android.permission.INTERNET" />
Then the easiest way is to use Apache http client bundled with Android:
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(new HttpGet(URL));
StatusLine statusLine = response.getStatusLine();
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
String responseString = out.toString();
//..more logic
} else{
//Closes the connection.
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
If you want it to run on separate thread I'd recommend extending AsyncTask:
class RequestTask extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else{
//Closes the connection.
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (ClientProtocolException e) {
//TODO Handle problems..
} catch (IOException e) {
//TODO Handle problems..
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//Do anything with response..
}
}
You then can make a request by:
new RequestTask().execute("http://stackoverflow.com");
My question is how do I now post the actual results in a string? All i'm getting is the address when I do new RequestTask().execute(url).toString();
Your response is delivered as an argument to onPostExecute(String).
You're supposed to handle the response in this method. Be aware that onPostExecute(String) is run on the UI thread, so you cannot do lengthy operations as part of this method.
When you call new RequestTask().execute(url).toString(); you're simply invoking the toString() method of your AsyncTask (check the return value of execute(): it simply returns this, i.e. the AsyncTask that you're calling execute() on).
I am new to Java and I am trying to figure out how to receive a response from an HTTP request to a PHP page.
here is my main HTTP code:
class RequestTask extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else{
//Closes the connection.
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (ClientProtocolException e) {
//TODO Handle problems..
} catch (IOException e) {
//TODO Handle problems..
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//Do anything with response..
}
}
and this is what I am using to send the request:
new RequestTask().execute("http://www.mywebsite.com/registercheck.php?first=" + first2 + "&last=" + last2 + "&dispname=" + display2 + "&email=" + email2 + "&password=" + password2 );
which is nestled in an on-click. It works flawlessly, it adds the user to the table using the php file. Now how am I supposed to let my activity know that the entry was successful? Is there a way to read a response?
I tried searching but maybe I am looking for the wrong answers here, just a little confused. Thank you for any help or direction.
You can use interface as a callback to the activity.
Define a interface. Let your activity implement the interface. Use the interface as a cll back to the activity and return responseString.
Example :
How do I return a boolean from AsyncTask?
In order to avoid executing the http relating things in the UI thread, i migrated my code inside asynctask, before that, it was working fine on versions before 3.0 -- however, after literally copy pasting the code inside asynctask, it started to giving the invalid index, size is 0 exception. Whenever I need to use the method I am applying the call --
new dataRetrievalViaAsyncTask().execute(url, null, null); --
Whats wrong down there ?
class dataRetrievalViaAsyncTask extends AsyncTask<String, Void, Void>
{
#Override
protected void onPreExecute()
{
super.onPreExecute();
}
#Override
protected Void doInBackground(String... f_url)
{
Log.i("tag", "inside doInBackground");
String url2 = f_url[0];
Log.i("tag", url2);
HttpClient httpclient = new DefaultHttpClient();
Log.i("tag", "done : HttpClient httpclient = new DefaultHttpClient();");
HttpPost httppost = new HttpPost(url2);
Log.i("tag", "done : HttpPost httppost = new HttpPost(url);");
try
{
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
Log.i("tag", "done : httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));");
HttpResponse response = httpclient.execute(httppost);
Log.i("tag", "done : HttpResponse response = httpclient.execute(httppost);");
HttpEntity entity = response.getEntity();
Log.i("tag", "done : HttpEntity entity = response.getEntity();");
is = entity.getContent();
Log.i("tag", "after : is = entity.getContent();");
} catch (Exception e)
{
Log.e("log_tag", "Error in http connection", e);
}
// convert response to string
return null;
}
protected void onPostExecute()
{
try
{
Log.i("tag","before : BufferedReader reader = new BufferedReader(new Inp");
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = "0";
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
result = sb.toString();
} catch (Exception e)
{
Log.e("log_tag", "Error in http connection", e);
}
try
{
Log.i("tag", "before : jsons ");
jArray = new JSONArray(result);
JSONObject json_data = null;
Log.i("tag", Integer.toString(jArray.length()));
for (int i = 0; i < jArray.length(); i++)
{
json_data = jArray.getJSONObject(i);
uid = json_data.getInt("uid");
item1= json_data.getString("item1");
item2 = json_data.getString("item2");
item3 = json_data.getString("item3");
item4 = json_data.getString("item4");
item5 = json_data.getString("item5");
item6 = json_data.getString("item6");
favorited = json_data.getString("favorited");
currentList.add(new itemClass(uid, item1 item2)); //there is a constructor for this in the itemClass
itemClass toSendToOffline = new itemsClass(uid, item1, item2, item3, item4, item5, item6, favorited);
myDBHelper.insertFromOnlineToDBtoSendToOffline();
}
} catch (JSONException e1)
{
Toast.makeText(getBaseContext(), "Not Found", Toast.LENGTH_LONG).show();
} catch (ParseException e1)
{
e1.printStackTrace();
}
super.onPostExecute(null);
}
}
(mainly the code is stopping at --
HttpResponse response = httpclient.execute(httppost);
I can not see nameValuePairs variable initialized anywhere, which is actually causing problem.
class dataRetrievalViaAsyncTask extends AsyncTask<Void, Void, String>
{
String URL = "";
public dataRetrievalViaAsyncTask( String url )
{
URL = url;
}
#Override
protected void onPreExecute()
{
}
#Override
protected String doInBackground(Void... f_url)
{
String result="";
try
{
result=fetchdataFromServer(URL);
}
catch (JSONException e)
{
e.printStackTrace();
}
return result;
}
protected void onPostExecute(String result)
{
// See your results as string //result
}
public JSONObject getJsonObjectToRequestToServer(String plid) throws JSONException
{
JSONObject parms = new JSONObject();
parms.put("user_id", "");
parms.put("app_key", "xyz");
parms.put("secret", "abc");
parms.put("token", "");
parms.put("playurl", "1");
parms.put("mode", "playlistdetail");
parms.put("playlist_id", plid);
return parms;
}
public String fetchdataFromServer(String url) throws JSONException
{
String stringresponce = null;
try
{
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(URL);
JSONObject parms = getJsonObjectToRequestToServer("1");
StringEntity se;
se = new StringEntity(parms.toString());
httpPost.setEntity(se);
httpPost.setHeader("Content-type", "application/json");
#SuppressWarnings("rawtypes")
ResponseHandler responseHandler = new BasicResponseHandler();
stringresponce = httpClient.execute(httpPost, responseHandler);
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
catch (ClientProtocolException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
return stringresponce;
}
}
put this code in your code and pass arguments ass you need this is the way how i request to server and get json response as string from result variable pass arguments to your url as i passed by making json object then convert them to string
then execute like this............
dataRetrievalViaAsyncTask asyncTask=new dataRetrievalViaAsyncTask(Yoururl);
asyncTask.execute();
hope this will help if you have some issues please post here thanks......