Connection works better on real devices

app/build.gradle

@@ -14,9 +14,10 @@ android {
     buildTypes {
 
         debug {
+            //Connexion to the internal API of Comunic
             buildConfigField "String", "api_url", "\"http://devweb.local/comunic/api/\""
-            buildConfigField "String", "api_service_name", "testService"
+            buildConfigField "String", "api_service_name", "\"testService\""
-            buildConfigField "String", "api_service_token", "testPasswd"
+            buildConfigField "String", "api_service_token", "\"testPasswd\""
         }
 
         release {

app/src/main/java/org/communiquons/android/comunic/client/APIPostData.java

@@ -51,7 +51,7 @@ class APIPostData {
         }
 
         //Return result
-        return encoded_key + "&" + encoded_value;
+        return encoded_key + "=" + encoded_value;
     }
 
 }

app/src/main/java/org/communiquons/android/comunic/client/APIRequestParameters.java

@@ -8,7 +8,7 @@ import java.util.ArrayList;
  * Created by pierre on 10/31/17.
  */
 
-class APIParameters {
+class APIRequestParameters {
 
     /**
      * Parameters of the request
@@ -25,7 +25,7 @@ class APIParameters {
      *
      * @param uri The request URI on the server
      */
-    APIParameters(String uri){
+    APIRequestParameters(String uri){
         //Save request URI
         request_uri = uri;
 
@@ -43,4 +43,34 @@ class APIParameters {
         parameters.add(new APIPostData(name, value));
     }
 
+    /**
+     * Retrieve request URI
+     *
+     * @return The request URI
+     */
+    String getRequest_uri() {
+        return request_uri;
+    }
+
+    /**
+     * Return all the request parameters as a string ready to be passed to the request output
+     * stream.
+     *
+     * @return A string
+     */
+    String get_parameters_encoded(){
+
+        //Return string
+        String result = "";
+
+        //Process loop
+        for(int i = 0; i < parameters.size(); i++){
+
+            //Make sure to separate parameters
+            result += (i > 0 ? "&" : "");
+            result += parameters.get(i).get_encoded();
+        }
+
+        return result;
+    }
 }

app/src/main/java/org/communiquons/android/comunic/client/APIRequestTask.java

@@ -4,12 +4,122 @@ import android.os.AsyncTask;
 
 import org.json.JSONObject;
 
+import java.io.BufferedOutputStream;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.Reader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
 /**
+ * Perform an API request on the server
+ *
  * Created by pierre on 10/31/17.
  */
+//TODO Create APIResponse class
+abstract class APIRequestTask extends AsyncTask<APIRequestParameters, Void, APIResponse> {
 
-abstract class APIRequestTask extends AsyncTask<APIParameters, Void, JSONObject> {
+    /**
+     * Background task
+     *
+     * Warning: This method support only one request per object
+     *
+     * @param params Parametres required to perform the API request
+     * @return JSONObject The result of the request
+     */
+    @Override
+    protected APIResponse doInBackground(APIRequestParameters... params) {
 
+        try {
+            //Perform the API request
+            return downloadUrl(params[0]);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
 
 
     }
+
+    /**
+     * The next action to do once we got a response is implemented by the method that perform
+     * the request.
+     *
+     * @param result The result of the request
+     */
+    abstract protected void onPostExecute(APIResponse result);
+
+    /**
+     * Peform an API request on the server and return the result as a JSON code
+     *
+     * @param parameters The parameters to pass to the server
+     * @return The result of the request
+     */
+    private APIResponse downloadUrl(APIRequestParameters parameters) throws Exception{
+
+        APIResponse result = new APIResponse();
+
+        InputStream is = null;
+
+        try {
+
+            //Determine the URL of the request
+            URL url = new URL(BuildConfig.api_url + parameters.getRequest_uri());
+
+            //The request is being performed on an http server
+            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+
+            //Configure the connection
+            conn.setReadTimeout(3000);
+            conn.setConnectTimeout(3000);
+            conn.setRequestMethod("POST");
+            conn.setDoInput(true);
+            conn.setDoOutput(true);
+
+
+
+            //Send request parameters
+            OutputStream out = conn.getOutputStream();
+            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(out, "UTF-8");
+            BufferedWriter writer = new BufferedWriter(outputStreamWriter);
+            String parameters_encoded = parameters.get_parameters_encoded();
+            writer.write(parameters_encoded);
+            writer.flush();
+            writer.close();
+            out.close();
+
+            //Connect to the server
+            conn.connect();
+
+
+            //Get response code
+            result.setResponse_code(conn.getResponseCode());
+
+            is = conn.getInputStream();
+            String response = readIt(is, 5000);
+            result.setResponse(response);
+
+            conn.disconnect();
+
+        } finally {
+            //Close streams
+            if(is != null)
+                is.close();
+        }
+        //Return result
+        return result;
+    }
+
+    // Reads an InputStream and converts it to a String.
+    private String readIt(InputStream stream, int len) throws IOException {
+        Reader reader = null;
+        reader = new InputStreamReader(stream, "UTF-8");
+        char[] buffer = new char[len];
+        reader.read(buffer);
+        return new String(buffer);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/APIResponse.java

@@ -0,0 +1,83 @@
+package org.communiquons.android.comunic.client;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+/**
+ * Store and serve the response of an API request
+ *
+ * Created by pierre on 10/31/17.
+ */
+
+class APIResponse {
+
+    /**
+     * Reponse code
+     */
+    private int response_code;
+
+    /**
+     * Response string
+     */
+    private String response = null;
+
+    /**
+     * Constructor of the API response
+     */
+    APIResponse(){}
+
+    /**
+     * Set response string
+     *
+     * @param response The request response
+     */
+    void setResponse(String response) {
+        this.response = response;
+    }
+
+    /**
+     * Set the response code
+     *
+     * @param response_code The response code
+     */
+    void setResponse_code(int response_code) {
+        this.response_code = response_code;
+    }
+
+    /**
+     * Get the response code
+     *
+     * @return The response code of the request
+     */
+    public int getResponse_code() {
+        return response_code;
+    }
+
+    /**
+     * Get the response as a string
+     * @return The response
+     */
+    public String getResponseString() {
+        return response;
+    }
+
+    /**
+     * Get the response as a JSON object
+     *
+     * @return The response as JSON object. False in case of failure
+     */
+    public JSONObject getJSONObject(){
+
+        JSONObject response = null;
+
+        //Try to decode JSON object
+        try {
+            response = new JSONObject(this.response);
+        } catch (JSONException e) {
+            //In case of failure
+            e.printStackTrace();
+        }
+
+        return response;
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/LoginActivity.java

@@ -2,10 +2,15 @@ package org.communiquons.android.comunic.client;
 
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.EditText;
+import android.widget.ProgressBar;
+import android.widget.ScrollView;
 import android.widget.Toast;
 
+import org.json.JSONObject;
+
 public class LoginActivity extends AppCompatActivity {
 
     /**
@@ -44,6 +49,7 @@ public class LoginActivity extends AppCompatActivity {
         EditText login_mail = (EditText) findViewById(R.id.email_field);
         EditText login_password = (EditText) findViewById(R.id.password_field);
 
+
         int stop = 0;
 
         //Check password
@@ -64,6 +70,37 @@ public class LoginActivity extends AppCompatActivity {
         if(stop != 0)
             return;
 
+        open_loading_state(true);
+
+        //Perform a request on the API to check user credentials and get login tokens
+        APIRequestParameters params = new APIRequestParameters("user/connectUSER");
+        params.addParameter("userMail", ""+login_mail.getText());
+        params.addParameter("userPassword", ""+login_password.getText());
+
+        //Create Request
+        new APIRequestTask(){
+            @Override
+            protected void onPostExecute(APIResponse result) {
+
+                open_loading_state(false);
+
+
 
+            }
+        }.execute(params);
+    }
+
+    /**
+     * Switch between loading state and ready state for the login form
+     *
+     * @param show_progress Specify wether a progress bar should be shown or not
+     */
+    void open_loading_state(boolean show_progress){
+        //Grab elements
+        ProgressBar progressBar = (ProgressBar) findViewById(R.id.progress_bar);
+        ScrollView login_form = (ScrollView) findViewById(R.id.login_form);
+
+        progressBar.setVisibility(show_progress ? View.VISIBLE : View.GONE);
+        login_form.setVisibility(show_progress ? View.GONE : View.VISIBLE);
     }
 }