Develop Reference

Is there a way to detect internet connectivity change when phone is connected to wifi over hotspot?

Phone A has mobile data ON and is sharing internet via Wi-Fi hotspot to Phone B. If Mobile Data is TURNED OFF in phone A, no connectivity change is received #PhoneB. How can I get this change in Phone B when mobile data is turned ON/OFF in Phone A?
Phone B is Android phone.

Yes there is. Simply register BroadcastReceiver for connectivity changes:
#Override
public void register(Context context) {
receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if (isOnline()) {
if (listener != null) {
listener.onConnected();
}
hideNoConnectionError();
} else {
showNoConnectionError();
}
}
};
final IntentFilter intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
context.registerReceiver(receiver, intentFilter);
}
and on change event check whatever connectivity change there was

Broadcast action for WIFI change

In my application I have to get notified whenever the device connects or disconnects from a WIFI network. For this I have to use a BroadcastReceiver but after reading through different articles and questions here on SO I'm a bit confused which Broadcast action I should use for this. In my opinion I have three choices:
SUPPLICANT_CONNECTION_CHANGE_ACTION
NETWORK_STATE_CHANGED_ACTION
CONNECTIVITY_ACTION
To reduce resources I really only want to get notified whenever the device is CONNECTED to a WIFI network (and it has received an IP address) or when the device has DISCONNECTED from one. I do not care about the other states like CONNECTING etc.
So what do you think is the best Broadcast action I should use for this? And do I have to manully filter the events (because I receieve more then CONNECTED and DISCONNECTED) in onReceive?
EDIT: As I pointed out in a comment below I think SUPPLICANT_CONNECTION_CHANGE_ACTION would be the best choice for me but it is never fired or received by my application. Others have the same problem with this broadcast but a real solution for this is never proposed (in fact other broadcasts are used). Any ideas for this?

You can go for WifiManager.NETWORK_STATE_CHANGED_ACTION works.
Register receiver with WifiManager.NETWORK_STATE_CHANGED_ACTION Action, either in Manifest or Fragment or Activity, which ever suited for you.
Override receiver :
#Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if(action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)){
NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
boolean connected = info.isConnected();
if (connected)
//call your method
}
}

Please try
#Override
protected void onResume() {
super.onResume();
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
filter.addAction("android.net.wifi.STATE_CHANGE");
registerReceiver(networkChangeReceiver, filter);
}
#Override
protected void onDestroy() {
unregisterReceiver(networkChangeReceiver);
super.onDestroy();
}
and
BroadcastReceiver networkChangeReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if (!AppUtils.hasNetworkConnection(context)) {
showSnackBarToast(getNetworkErrorMessage());
}
}
};
I am using this and it is working for me. Hope it will help you out.

NetworkReceiver never called after changes to Network State

To conserver battery in my application, whenever my app needs to sync with the cloud, I first check if the network is available. If no connection is available, I register a network broadcast receiver as follows. But this never gets called.
I'm testing this by putting the device into airplane mode. I see the "Network Receiver ENABLED" message. But after I disable airplane mode, and after my Wifi connects, I expect to see the "Received Network Change Intent" message, and it never appears.
Can anyone point out what I may be doing wrong?
IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
networkReceiver = new NetworkReceiver();
registerReceiver(networkReceiver, filter);
Log.d(TAG, "Network Receiver ENABLED");
This is the NetworkReceiver:
public class NetworkReceiver extends BroadcastReceiver {
private static String TAG = NetworkReceiver.class.getSimpleName();
#Override
public void onReceive(Context context_, Intent intent_) {
Log.d(TAG, "Received Network Change Intent");
}
}

You can try below option.
Set Network Access Permission if you haven't declare in manifest file: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"> </uses-permission>.
Register Receiver using context:
Instead of registerReceiver(networkReceiver, filter); use getApplicationContext().registerReceiver(networkReceiver, filter);

Android broadcastReceiver issue power connection

I want to receive an interrupt when the android device starts charging either thr USB or AC
I have registered the receiver through the following code--
registerReceiver(powerMonitor,newIntentFilter("android.intent.action.ACTION_POWER_CONNECTED"));
The code which accepts the broadcast is--
public void onReceive(Context context, Intent intent) {
powerMonitor = new BroadcastReceiver() {
public void onReceive(Context context,Intent intent) {
if (intent.getAction().equals("android.intent.action.ACTION_POWER_CONNECTED"))
{
msg = "power connected";
}
The issue is when I connect the device through a USB cable I fail to get the interrupt and if I try to remove and plug the USB cable,the VM gets disconnected..How do I check it?
Have I gone wrong?
I even tried d following code--
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(broadcastReceiver, filter);
int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
if(plugged==BatteryManager.BATTERY_PLUGGED_AC ||plugged==BatteryManager.BATTERY_PLUGGED_USB)
{
msg="power connected"
}
Please help!!

please have a look on this link (The answer given by me)
activate an application when a power button is clicked
this will help you to solve your problem.

Android : whenever the phone is connected to wifi send an http request

im trying to make an android application that whenever a user conncects to a wifi, application sends an http request to my server, later on by using push notification server sends some msgs to the user. but in here i have a problems: how to make this application running in background and also it understand if phone is connected to a wifi, means even if applcation is closed it still be aware and whenever the phone is connected to a wifi it sends the http request. Thanks

private void registerForWifiBroadcasts() {
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
intentFilter.addAction(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
intentFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
mContext.registerReceiver(mReceiver, intentFilter);
}
#Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
handleNetworkStateChanged(
(NetworkInfo) intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO));
} else if (action.equals(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION)) {
handleSupplicantConnectionChanged(
intent.getBooleanExtra(WifiManager.EXTRA_SUPPLICANT_CONNECTED, false));
} else if (action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) {
handleWifiStateChanged(intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,
WifiManager.WIFI_STATE_UNKNOWN));
}
}
And: Make it a Service