Question

I am trying to get my app automatically launched when the phone gets connected to wifi. Here’s the code I am using to both set the Broadcast receiver and to specify that once the broadcast is received I want the “Connected” activity to be launched:

IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
receiver = new BroadcastReceiver(){
                public void onReceive(Context context, Intent intent){
                    Intent intent2 = new Intent(getApplicationContext(),com.example.package.Connected.class);
                    startActivity(intent2);
                }
            };
registerReceiver(receiver,intentFilter); 

Unfortunately it’s not working. The logcat says my activity has “leaked IntentReceiver”.

Does anyone know how I can solve this?

EDIT: I also tried to register the receiver via the Manifest file. I added this code to the manifest:

<receiver android:name="com.example.package.receiver">
    <intent-filter>
          <action android:name="android.net.wifi.STATE_CHANGE" />
    </intent-filter>
</receiver>

And then this code to my main activity:

private BroadcastReceiver receiver = new BroadcastReceiver(){
        public void onReceive(Context context, Intent intent){
            Intent intent2 = new Intent(getApplicationContext(),com.example.package.Connected.class);
            context.startActivity(intent2);
        }
    };

But now my app crashes once the phone connects to wifi. Logcat says “RuntimeException: Unable to instantiate receiver”.

Any ideas how to solve it?

Answer 1

I am trying to get my app automatically launched when the phone gets connected to wifi.

Register your BroadcastReceiver in the manifest, using a <receiver> element, and have the receiver call startActivity() on the Context supplied in the onReceive() method.

Note that users may not appreciate your popping up an activity just because the device connected to WiFi.