BroadcastReceiver declared in manifest is not receiving the Broadcast

Question

I\'ve tried to register a Wifi BroadcastReceiver to get the wifi state when it changes. But so far I have no luck receiving the broadcast.

Answer 1

I think you have registered the receiver like this way:

<receiver
    android:name=".WiFiReciever">
    <intent-filter>
        <action
            android:name="class name with package" />
        <data
            android:scheme="myscheme" />
    </intent-filter>
</receiver> 

Answer 2

The best that worked for me:

Manifest:

<receiver android:name="com.AEDesign.communication.WifiReceiver">
    <intent-filter android:priority="100">
        <action android:name="android.net.wifi.STATE_CHANGE" />
    </intent-filter>
</receiver>

WifiReceiver Class:

public class WifiReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
        if(info != null) {
            if(info.isConnected()) {
                //Do your work. 
                //To check the Network Name or other info:
                WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
                WifiInfo wifiInfo = wifiManager.getConnectionInfo();
                String ssid = wifiInfo.getSSID();    
            }
        }
    }
}

Permissions:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

Answer 3

If your Target android version is more than Android O. if you declare receivers in manifest they wont work. So you need to register inside your activity.

Note: If your app targets API level 26 or higher, you cannot use the manifest to declare a receiver for implicit broadcasts (broadcasts that do not target your app specifically), except for a few implicit broadcasts that are exempted from that restriction. In most cases, you can use scheduled jobs instead.

Resource: https://developer.android.com/guide/components/broadcasts

Answer 4

Your receiver in manifest should looks like this

<receiver android:name=".WifiReceiver" >
    <intent-filter>
       <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
    </intent-filter>
</receiver>

Also the following permission may be needed

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Answer 5

<receiver android:name=".WifiReceiver" >
     <intent-filter android:priority="100" >
          <action
             android:name="android.net.wifi.WIFI_STATE_CHANGED"
             android:enabled="true" />
     </intent-filter>
</receiver>

Enter the high priority and also enabled flag as true

Answer 6

Just because the broadcast was send with flag Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT, it means, your app must register this receiver before android boot up, which can only be the system services.