İnternet erişimi kontrolü.

if (InternetConnectivity.isConnected(getApplicationContext())) {
//Bağlantı başarılı...
} else {
//Bağlantı başarısız...
}

HelpersClass/InternetKontrolu.java

@@ -0,0 +1,80 @@
+package sizin.package.adiniz;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.telephony.TelephonyManager;
+
+public class InternetConnectivity {
+
+    public static NetworkInfo getNetworkInfo(Context context) {
+        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        return cm.getActiveNetworkInfo();
+    }
+
+    public static boolean isConnected(Context context) {
+        NetworkInfo info = InternetConnectivity.getNetworkInfo(context);
+        return (info != null && info.isConnected());
+    }
+
+    public static boolean isConnectedWifi(Context context) {
+        NetworkInfo info = InternetConnectivity.getNetworkInfo(context);
+        return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_WIFI);
+    }
+
+    public static boolean isConnectedMobile(Context context) {
+        NetworkInfo info = InternetConnectivity.getNetworkInfo(context);
+        return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_MOBILE);
+    }
+
+    public static boolean isConnectedFast(Context context) {
+        NetworkInfo info = InternetConnectivity.getNetworkInfo(context);
+        return (info != null && info.isConnected() && InternetConnectivity.isConnectionFast(info.getType(), info.getSubtype()));
+    }
+
+    public static boolean isConnectionFast(int type, int subType) {
+        if (type == ConnectivityManager.TYPE_WIFI) {
+            return true;
+        } else if (type == ConnectivityManager.TYPE_MOBILE) {
+            switch (subType) {
+                case TelephonyManager.NETWORK_TYPE_1xRTT:
+                    return false; // ~ 50-100 kbps
+                case TelephonyManager.NETWORK_TYPE_CDMA:
+                    return false; // ~ 14-64 kbps
+                case TelephonyManager.NETWORK_TYPE_EDGE:
+                    return false; // ~ 50-100 kbps
+                case TelephonyManager.NETWORK_TYPE_EVDO_0:
+                    return true; // ~ 400-1000 kbps
+                case TelephonyManager.NETWORK_TYPE_EVDO_A:
+                    return true; // ~ 600-1400 kbps
+                case TelephonyManager.NETWORK_TYPE_GPRS:
+                    return false; // ~ 100 kbps
+                case TelephonyManager.NETWORK_TYPE_HSDPA:
+                    return true; // ~ 2-14 Mbps
+                case TelephonyManager.NETWORK_TYPE_HSPA:
+                    return true; // ~ 700-1700 kbps
+                case TelephonyManager.NETWORK_TYPE_HSUPA:
+                    return true; // ~ 1-23 Mbps
+                case TelephonyManager.NETWORK_TYPE_UMTS:
+                    return true; // ~ 400-7000 kbps
+
+                case TelephonyManager.NETWORK_TYPE_EHRPD: // API level 11 
+                    return true; // ~ 1-2 Mbps
+                case TelephonyManager.NETWORK_TYPE_EVDO_B: // API level 9
+                    return true; // ~ 5 Mbps
+                case TelephonyManager.NETWORK_TYPE_HSPAP: // API level 13
+                    return true; // ~ 10-20 Mbps
+                case TelephonyManager.NETWORK_TYPE_IDEN: // API level 8
+                    return false; // ~25 kbps 
+                case TelephonyManager.NETWORK_TYPE_LTE: // API level 11
+                    return true; // ~ 10+ Mbps
+                case TelephonyManager.NETWORK_TYPE_UNKNOWN:
+                default:
+                    return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+}