Develop Reference

ConnectivityManager in Android L Preview

My app checks for Network connection when starting. In Android versions 2.3 thru 4.4 the below method works great (whether emulator or actual device). On the Android L Preview Emulator, the method comes back false.
Here is my code:
// ===============================================================
public static boolean haveNetworkConnection(Context ctx) {
boolean haveConnectedWifi = false;
boolean haveConnectedMobile = false;
boolean haveConnectedEthernet = false;
ConnectivityManager cm = (ConnectivityManager) ctx
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo) {
// String con = ni.isConnected() ? "Connected" : "Not Connected";
if (!haveConnectedWifi) {
if (ni.getTypeName().equalsIgnoreCase("WIFI"))
if (ni.isConnected())
haveConnectedWifi = true;
}
if (!haveConnectedMobile) {
if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
if (ni.isConnected())
haveConnectedMobile = true;
}
if (!haveConnectedEthernet) {
if (ni.getTypeName().equalsIgnoreCase("ETHERNET"))
if (ni.isConnected())
haveConnectedEthernet = true;
}
StringBuilder sb = new StringBuilder();
sb.append(ni.getTypeName()).append(" ").append(ni);
}
return haveConnectedWifi || haveConnectedMobile
|| haveConnectedEthernet;
}
There is some weird StringBuilder stuff, I did not create this code -- it is in a project I inherited. I have not needed to change anything since it works. Does anyone know if there is any API changes with how ConnectivityManager works? I checked the API overview changes on the dev site but did not see any relevant info on this.

Typename has been changed in L, for example should check "Cellular" instead of "MOBILE".

Is there any api to connect internet using Ethernet in android

I have implemented code for connect internet through WifiManager.java. but i am not able to find any api to connect internet through Ethernet. Can any one help me.

Not that I am aware of.
Here is a method that detected WIFI and Data separately.
Perhaps you can alter this and put a prompt in there forcing user to turn off data and turn on WIFI.
public static boolean isNetworkConnected(Context context) {
boolean isConnectedWifi = false;
boolean isConnectedMobile = false;
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo) {
if (ni.getTypeName().equalsIgnoreCase("WIFI"))
if (ni.isConnected())
isConnectedWifi = true;
if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
if (ni.isConnected())
isConnectedMobile = true;
}
return isConnectedWifi || isConnectedMobile;
}

Wifi communication only

I need to communicate over htttp or https from an android, and I need a settings for my app "wifi only". It's a restriction for the communication. How to implement such a thing? I cannot find any information on AndroidHttpClient works only with Wifi - or 3G as well, and how to restrict it.

This code will check for wifi connection.
public static boolean hasWIFIConnection(Context context)
{
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifiNetwork = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (wifiNetwork != null && wifiNetwork.isConnected())
{
return true;
}
return false;
}

I've heard about the setNetworkPreference(int preference) method in the ConnectivityManager service. Although it is poorly documented, it appears this method can be used with integer constants which represents a network type.
You can find references to such constants in the ConnectivityManager class :
TYPE_MOBILE
TYPE_WIFI
...
I would start digging this way.
EDIT :
You will need to be granted the folowing permissions :
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>

try like this
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo)
{
if (ni.getTypeName().equalsIgnoreCase("WIFI"))
if (ni.isConnected())
haveConnectedWifi = true;
if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
if (ni.isConnected())
haveConnectedMobile = true;}

starting from 23 getNetworkInfo is deprecated, use getActiveNetworkInfo
public boolean hasWIFIConnection()
{
ConnectivityManager connMgr = (ConnectivityManager) ContextProvider.getInstance().getApplication().getSystemService(Activity.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = connMgr.getActiveNetworkInfo();
if (activeNetwork != null && (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) && activeNetwork.isConnected())
{
return true;
}
return false;
}

Checking if 3G is connected always returns false (even when the device is connected)

Whether or not the device has 3g/data activated. Any idea of what's happening?
Thank you
My code:
public boolean isConnected3G(){
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] networks = cm.getAllNetworkInfo();
for (NetworkInfo ni : networks)
if ("MOBILE".equalsIgnoreCase(ni.getTypeName())){
Log.d(TAG,""+ni.isConnected());
if (ni.isConnected())
return true;
}
return false;
}

Try to use NetworkInfo ni = cm.getActiveNetworkInfo() instead of cm.getAllNetworkInfo();
and check the network information

Android cell phone - how to handle intermittent connectivity

I am not sure this problem belongs here.... but still ....
My application exchange's data with server every 3 minutes. I am using honeycomb tablet on cell phone coverage(not Wi-Fi). If a person is using it where there is no cell phone covearge he is not going to get new data. How do I deal with this situation? What do I do in the application?

Here this will allow you to test for WIFI and 3g/4g coverage:
private boolean hasNetworkConnection() {
boolean haveConnectedWifi = false;
boolean haveConnectedMobile = false;
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo) {
if (ni.getTypeName().equalsIgnoreCase("WIFI"))
if (ni.isConnected())
haveConnectedWifi = true;
if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
if (ni.isConnected())
haveConnectedMobile = true;
}
return haveConnectedWifi || haveConnectedMobile;
}