I have an app which updates the database whenever the phone is connected to WiFi. I have implemented a Service
and BroadcastReceiver
which will run the Service
(it will tell me what network is in use), but the problem is I don't know what to add in the manifest
file to start BroadcastReceiver
when the network state changes or when it connects to some kind of network
Broadcast in android is the system-wide events that can occur when the device starts, when a message is received on the device or when incoming calls are received, or when a device goes to airplane mode, etc. Broadcast Receivers are used to respond to these system-wide events.
The onReceiver() method is first called on the registered Broadcast Receivers when any event occurs. The intent object is passed with all the additional data. A Context object is also available and is used to start an activity or service using context.
A broadcast receiver (receiver) is an Android component which allows you to register for system or application events. All registered receivers for an event are notified by the Android runtime once this event happens.
You need
<intent-filter> <action android:name="android.net.wifi.WIFI_STATE_CHANGED"/> <action android:name="android.net.wifi.STATE_CHANGE"/> </intent-filter>
In your receiver
tag.
Or if you want more control over it, before registering BroadcastReceiver
set these up:
final IntentFilter filters = new IntentFilter(); filters.addAction("android.net.wifi.WIFI_STATE_CHANGED"); filters.addAction("android.net.wifi.STATE_CHANGE"); super.registerReceiver(yourReceiver, filters);
WIFI_STATE_CHANGED
Broadcast <intent-action>
indicating that Wi-Fi has been enabled, disabled, enabling, disabling, or unknown. One extra provides this state as an int. Another extra provides the previous state, if available.
STATE_CHANGE
Broadcast <intent-action>
indicating that the state of Wi-Fi connectivity has changed. One extra provides the new state in the form of a NetworkInfo object. If the new state is CONNECTED, additional extras may provide the BSSID and WifiInfo of the access point. as a String
Also, you'll need to specify the right permissions inside manifest
tag:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
To check connectivity, you can use ConnectivityManager
as it tells you what type of connection is available.
ConnectivityManager conMngr = (ConnectivityManager)this.getSystemService(this.CONNECTIVITY_SERVICE); android.net.NetworkInfo wifi = conMngr.getNetworkInfo(ConnectivityManager.TYPE_WIFI); android.net.NetworkInfo mobile = conMngr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
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