diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index e817e2f..6de4084 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -5,6 +5,8 @@
     <uses-feature
         android:name="android.hardware.usb.host"
         android:required="true" />
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/fr/mobdev/lpcprog/listener/NetworkListener.java b/app/src/main/java/fr/mobdev/lpcprog/listener/NetworkListener.java
new file mode 100644
index 0000000..f850117
--- /dev/null
+++ b/app/src/main/java/fr/mobdev/lpcprog/listener/NetworkListener.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2015  Anthony Chomienne, anthony@mob-dev.fr
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package fr.mobdev.lpcprog.listener;
+
+import java.util.EventListener;
+
+import fr.mobdev.lpcprog.objects.Binary;
+import fr.mobdev.lpcprog.objects.Server;
+
+public interface NetworkListener extends EventListener{
+    void startBinaries();
+    void startServer(Server server);
+    void endServer(Server server);
+    void endBinaries();
+    void onError(String string);
+    void downloadCanceled(Server server, Binary binary);
+    void downloadSuccessful(Server server, Binary binary);
+    void downloadFailed(Server server, Binary binary);
+    void downloadError(Server server, Binary binary, String string);
+    void progress(Server server, Binary binary, int progress);
+}
diff --git a/app/src/main/java/fr/mobdev/lpcprog/managers/DatabaseManager.java b/app/src/main/java/fr/mobdev/lpcprog/managers/DatabaseManager.java
index 4b0e486..35f6644 100644
--- a/app/src/main/java/fr/mobdev/lpcprog/managers/DatabaseManager.java
+++ b/app/src/main/java/fr/mobdev/lpcprog/managers/DatabaseManager.java
@@ -1,3 +1,21 @@
+/*
+ * Copyright (C) 2015  Anthony Chomienne, anthony@mob-dev.fr
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 package fr.mobdev.lpcprog.managers;
 
 import android.content.ContentValues;
@@ -101,4 +119,7 @@ public class DatabaseManager extends SQLiteOpenHelper {
         cursor.close();
         return list;
     }
+
+    public void serverFail(Server server) {
+    }
 }
diff --git a/app/src/main/java/fr/mobdev/lpcprog/managers/NetworkManager.java b/app/src/main/java/fr/mobdev/lpcprog/managers/NetworkManager.java
index c9cd813..7477284 100644
--- a/app/src/main/java/fr/mobdev/lpcprog/managers/NetworkManager.java
+++ b/app/src/main/java/fr/mobdev/lpcprog/managers/NetworkManager.java
@@ -1,4 +1,241 @@
 package fr.mobdev.lpcprog.managers;
 
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.List;
+
+import fr.mobdev.lpcprog.R;
+import fr.mobdev.lpcprog.listener.NetworkListener;
+import fr.mobdev.lpcprog.objects.Binary;
+import fr.mobdev.lpcprog.objects.Server;
+
 public class NetworkManager {
+
+    private NetworkListener listener;
+    private static NetworkManager instance;
+    private Context context;
+    private boolean isCanceled;
+    private boolean downloadInProgress;
+
+    private NetworkManager(NetworkListener listener, Context context)
+    {
+        this.listener = listener;
+        this.context = context;
+        this.isCanceled = false;
+    }
+
+    public static NetworkManager getInstance(NetworkListener listener, Context context){
+        if (instance == null)
+            instance = new NetworkManager(listener,context);
+        if(listener != null && listener != instance.getListener())
+            instance.setListener(listener);
+        return instance;
+    }
+
+    private NetworkListener getListener()
+    {
+        return listener;
+    }
+
+    private void setListener(NetworkListener listener)
+    {
+        this.listener = listener;
+    }
+
+    public void browseBinaries(){
+        if(isConnectedToInternet(context)) {
+            new Thread(new Runnable() {
+                @Override
+                public void run() {
+                    getBinariesList();
+                }
+            }).start();
+        }
+        else
+            listener.onError(context.getString(R.string.network_error));
+    }
+
+    public void retrieveBinary(final Server server, final Binary binary){
+        if(isConnectedToInternet(context)){
+           new Thread(new Runnable() {
+               @Override
+               public void run() {
+                   getBinary(server, binary);
+               }
+           }).start();
+        }
+        else
+            listener.onError(context.getString(R.string.network_error));
+    }
+
+    private void getBinariesList(){
+        List<List<Server>> servers = DatabaseManager.getInstance(context).getServers();
+        List<Server> serversAvailable = new ArrayList<>();
+        for(Server server : servers.get(0)){
+            serversAvailable.add(server);
+        }
+        for(Server server : servers.get(1)){
+            serversAvailable.add(server);
+        }
+
+        listener.startBinaries();
+
+        for(Server server : serversAvailable) {
+            listener.startServer(server);
+            try {
+                URL url = new URL(server.url.toString()+"Binaries");
+                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+                connection.setDoInput(true);
+                InputStream stream = connection.getInputStream();
+                if(stream != null){
+                    InputStreamReader isr = new InputStreamReader(stream);
+                    BufferedReader reader = new BufferedReader(isr);
+                    String line = reader.readLine();
+                    while(line != null){
+                        Binary b = parseLine(line);
+                        if(b != null)
+                            server.addBinary(b);
+                        line = reader.readLine();
+                    }
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+                DatabaseManager.getInstance(context).serverFail(server);
+            } finally {
+             listener.endServer(server);
+            }
+        }
+        listener.endBinaries();
+    }
+
+    private Binary parseLine(String line){
+        if(!line.matches("(.*;){5}")){
+            System.out.println("Line not match regex");
+            return null;
+        }
+        Binary b = new Binary();
+        b.name = line.substring(0,line.indexOf(";"));
+        line = line.substring(line.indexOf(";")+1);
+        b.filename = line.substring(0,line.indexOf(";"));
+        line = line.substring(line.indexOf(";")+1);
+        b.version = Integer.valueOf(line.substring(0,line.indexOf(";")));
+        line = line.substring(line.indexOf(";")+1);
+        b.path = line.substring(0,line.indexOf(";"));
+        line = line.substring(line.indexOf(";")+1);
+        b.sha1 = line.substring(0,line.indexOf(";"));
+        return b;
+    }
+
+    private void getBinary(Server server, Binary binary){
+        try {
+            URL url = new URL(server.url.toString() + binary.path + binary.filename);
+            downloadInProgress = true;
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setDoInput(true);
+            InputStream stream = connection.getInputStream();
+            File file = new File(context.getApplicationInfo().dataDir+"/"+server.id+"/"+binary.path+binary.filename);
+            file.getParentFile().mkdirs();
+            if (!file.createNewFile() && !file.canWrite()){
+                listener.downloadError(server,binary,context.getString(R.string.cant_create_file));
+                return;
+            }
+            FileOutputStream output = new FileOutputStream(file);
+            int fileLength = connection.getContentLength();
+            if (stream != null) {
+                byte[] data = new byte[4096];
+                long totalSizeReaded = 0;
+                int sizeReaded ;
+                while((sizeReaded = stream.read(data)) != -1){
+                    if(isCanceled) {
+                        isCanceled = false;
+                        downloadInProgress = false;
+                        listener.downloadCanceled(server,binary);
+                        stream.close();
+                        output.close();
+                        cleanupFile(server,binary);
+                        return;
+                    }
+                    totalSizeReaded += sizeReaded;
+                    if(fileLength > 0){
+                        listener.progress(server,binary, (int) totalSizeReaded * 100 / fileLength);
+                    }
+                    output.write(data,0,sizeReaded);
+                }
+                output.close();
+                if(checkFileSha1(server,binary))
+                    listener.downloadSuccessful(server,binary);
+                else
+                    listener.downloadError(server,binary,context.getString(R.string.sha1_error));
+            }
+        }catch (IOException e) {
+            e.printStackTrace();
+            cleanupFile(server,binary);
+            listener.downloadFailed(server,binary);
+        }
+        downloadInProgress = false;
+        isCanceled = false;
+    }
+
+    public boolean checkFileSha1(Server server, Binary binary){
+        String sha1 = "";
+        try {
+            File f = new File(context.getApplicationInfo().dataDir+"/"+server.id+"/"+binary.path+binary.filename);
+            FileInputStream fis = new FileInputStream(f);
+            MessageDigest md = MessageDigest.getInstance("SHA-1");
+            byte[] data = new byte[4096];
+            int sizeReaded;
+            while((sizeReaded = fis.read(data)) >0){
+                md.update(data,0,sizeReaded);
+            }
+            byte[] output = md.digest();
+            for(byte b : output){
+                sha1 += String.format("%02x",b);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        System.out.println("Sha1 "+sha1);
+        return sha1.compareToIgnoreCase(binary.sha1) == 0;
+    }
+
+    public boolean cleanupFile(Server server, Binary binary){
+        File f = new File(context.getApplicationInfo().dataDir+"/"+server.id+"/"+binary.path+binary.filename);
+        return f.delete();
+    }
+
+    public void cancelDownload(){
+        if(downloadInProgress)
+            isCanceled = true;
+    }
+
+    private boolean isConnectedToInternet(Context context)
+    {
+        //verify the connectivity
+        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
+        if (networkInfo != null)
+        {
+            NetworkInfo.State networkState = networkInfo.getState();
+            if (networkState.equals(NetworkInfo.State.CONNECTED))
+            {
+                return true;
+            }
+        }
+        return false;
+    }
 }
diff --git a/app/src/main/java/fr/mobdev/lpcprog/objects/Server.java b/app/src/main/java/fr/mobdev/lpcprog/objects/Server.java
index 44eba04..6e54ecf 100644
--- a/app/src/main/java/fr/mobdev/lpcprog/objects/Server.java
+++ b/app/src/main/java/fr/mobdev/lpcprog/objects/Server.java
@@ -10,4 +10,8 @@ public class Server {
     public boolean isActive;
     public int attempted;
     public List<Binary> binaries = new ArrayList<>();
+
+    public void addBinary(Binary b) {
+        binaries.add(b);
+    }
 }
diff --git a/app/src/main/res/layout/binary_item.xml b/app/src/main/res/layout/binary_item.xml
new file mode 100644
index 0000000..3509b84
--- /dev/null
+++ b/app/src/main/res/layout/binary_item.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9a66216..4019401 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -12,6 +12,9 @@
     <string name="add_server">Add a Server</string>
     <string name="device_informations">Device Informations</string>
     <string name="server_management">Manage Servers</string>
+    <string name="network_error">Network Unavailable</string>
+    <string name="sha1_error">Verification on file Failed</string>
+    <string name="cant_create_file">Can\\\'t create file</string>
     <array name="https">
         <item>http://</item>
         <item>https://</item>
diff --git a/build.gradle b/build.gradle
index a6fcfe1..cb98401 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.5.0'
+        classpath 'com.android.tools.build:gradle:2.0.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0c71e76..d570517 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip