Android-приложение отправляет строку для отображения на веб-странице

Хорошо, позвольте мне дать вам очень простой способ связать ваше приложение со страницей службы PHP …
Сначала убедитесь, что у вас уже есть следующие библиотеки:
1- http-core-4.1.jar
2- httpclient-4.0.3.jar

Затем создайте новый класс с именем JSONParser и вставьте этот код:

import android.util.Log;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;

public class JSONParser {

static InputStream is = null;
static JSONObject jObj = null;
static String json = "";

// constructor
public JSONParser() {

}

// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {

// Making HTTP request
try {

// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));

HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();

}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);

HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}

} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

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();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}

// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}

// return JSON String
return jObj;

}
}

Теперь перейдите к основному виду деятельности и сделайте так:

public class MainActivity extends AppCompatActivity {
JSONParser jparser = new JSONParser();
ProgressDialog pdialog;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

String msg = "Hello";

new connector().execute(msg); //This will create a new thread to connect with your service page.}

//The AsyncClass connector..class connector extends AsyncTask<String,String,String> {
@Override
protected void onPreExecute(){
pdialog = new ProgressDialog(MainActivity.this);
pdialog.setMessage("Sending Hi...");
pdialog.setCancelable(false);
pdialog.setIndeterminate(false);
pdialog.show();
}
//ArrayList to carry your values
List<NameValuePair> data = new ArrayList<>();

@Override
protected String doInBackground(String... params) {

try {

data.add(new BasicNameValuePair("msg",params[0])); //here we sit the key "msg" to carry your value which you passed on thread execute.

//Then create the JSONObject to make the rquest and pass the data(ArrayList).
JSONObject json = jparser.makeHttpRequest("Http://example.com/mypage.php","POST",data);

/*In case you want to receive a value from your page you should do something like this..
String getString = json.getString("key1");
Int getInt = json.getInt("key2");
key1,key2 are keys that you send from your page.
*/
} catch (Exception e) {
/* Any Exception here */
}

return null;

}

@Override
protected void onPostExecute(String file_url){
pdialog.dismiss();
// This After the thread did it's operate
/* For Example you Toast your key1,key2 values :D*/

}
}}

На вашей странице PHP вы должны сделать следующее:

<?php
//In case of receive..
$msg = $_POST['msg'];
echo $msg;

//In case of send..
$values = array();
$values["key1"] = "Hello this is key1";
$values["key2"] = "Hello this is key2";
echo json_encode($values); //this will make a json encode which you can get it back in your application ;)

?>

Надеюсь, это поможет :), и извините за мой плохой английский: v