问题
I have a web service in PHP which returns a String, he recives two parametres, id and te. I've tested its using with the mozzila addon poster, so i decided to use it for my android app.
This is my android code:
final String query = null;
AsyncHttpClient client = new AsyncHttpClient();
RequestParams rp = new RequestParams();
rp.put("id", num);
rp.put("te", tab);
Log.i("http","before send\n");
client.post("http://appdomain.hol.es/webService.php",rp, new JsonHttpResponseHandler(){
public void onSuccess(String jObject)
{
query.replace(query, jObject);
Log.i("http","recived: "+jObject+"\n");
}
public void onFailure(Throwable arg0)
{
Log.i("http","fail");
}
});
I'm debugging whith log.i and i've could seen that it doesn't show neither recived neither fail. can anyone helpl me?
PD: i leave the most relevant of webService
$id = $_POST["id"];
$te = $_POST["te"];
$query = "SELECT `preg` , `respA` , `respB` , `respC` , `respD` , `respV`FROM `".$te."` WHERE `id` =".$id;
$resultado= mysql_query($query,$link);
$arraySalida = array();
while($registro = mysql_fetch_assoc ($resultado) ):
$cadena = "{$registro['preg']};{$registro['respA']};{$registro['respB']};{$registro['respC']};{$registro['respD']};{$registro['respV']}";
$arraySalida[]= $cadena;
endwhile;
echo implode(":",$arraySalida);
the solution of @jaimin works but the compiler says: Type mismatch: cannot convert from AsyncTask to String in (!)
this is the code:
public String BBDD(int num, String tab)
{
HttpAsyncTask httpAsyncTask = new HttpAsyncTask(String.valueOf(num),tab);
/*(!)*/String resul = httpAsyncTask.execute("http://opofire.hol.es/webServiceOpoFire.php");
return resul;
}
回答1:
for Http Post i'll suggest you to use AsyncTask<> which will run in separate thread from UI here is the code i am using since two months and its working fine
private class HttpAsyncTask extends AsyncTask<String, Void, String> {
private String id,te;
public HttpAsyncTask(String id,String te){
this.id = id;
this.te = te;
}
@Override
protected String doInBackground(String... urls) {
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();
}
}
public static String POST(String url){
InputStream inputStream = null;
String result = "";
try {
// 1. create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// 2. make POST request to the given URL
HttpPost httpPost = new HttpPost(url);
// pass parameters in this way
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "value "));
nameValuePairs.add(new BasicNameValuePair("te", "value"));
//add data
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// 8. Execute POST request to the given URL
HttpResponse httpResponse = httpclient.execute(httpPost);
// 9. receive response as inputStream
inputStream = httpResponse.getEntity().getContent();
// 10. convert inputstream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
// 11. return result
return result;
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException {
// TODO Auto-generated method stub
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
for passing values you can create constructor like this.
form your activity do this
HttpAsyncTask httpAsyncTask = new HttpAsyncTask(id,te);//this will pass variables values
String ResultfromServer = httpAsyncTask.execute(urlStr);// String ResultfromServer is your response string
and in AsyncTask I've created constructor
this is very helpful for me hope it will help you too
回答2:
Look at below code for posting data to php
class PlaceOrder extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPst = new HttpPost(
"http://appdomain.hol.es/webService.php");
ArrayList<NameValuePair> parameters = new ArrayList<NameValuePair>(
2);
// add ur parameter here
parameters.add(new BasicNameValuePair("id", value1);
parameters.add(new BasicNameValuePair("te", value2);
httpPst.setEntity(new UrlEncodedFormEntity(parameters));
HttpResponse httpRes = httpClient.execute(httpPst);
String str=convertStreamToString(httpRes.getEntity().getContent()).toString();
Log.i("mlog","outfromurl"+str);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
public 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 (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
来源：https://stackoverflow.com/questions/25117153/android-http-post-web-service-php