How to wake up the network connection by a broadcastReceiver?

Question

I am making an Android app to forward SMS to Telegram. There is a broadcastReceiver listening to SMS, and then call a HTTP request sending to my own server. It works fine. However, when the screen is off, wifi is off as well. When there is a SMS, there is no network to send the HTTP request.

I have searched about Wakelock and Wifilock. Both of them seems not applicable in this case.

Is there a way to wake up the network connection for a while, to finish the HTTP call?

Thanks.

AndroidManifest.xml

<receiver android:name=".SmsReceiver" android:enabled="true" android:exported="true">
        <intent-filter android:priority="500">
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>

SmsReceiver.java

public class SmsReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, Intent intent) {
    WifiLockManager.acquireWifiLock(context);

    RequestQueue queue = Volley.newRequestQueue(context);
    String url = "https://smsforwarder.mydomain.xyz/";

    Bundle bundle = intent.getExtras();
    if (bundle != null) {
        String sender = "";
        String message = "";

        SmsMessage[] sms = Telephony.Sms.Intents.getMessagesFromIntent(intent);
        for (int i=0; i < sms.length; i++) {
            SmsMessage smsMessage = sms[i];
            sender = smsMessage.getOriginatingAddress();
            message += smsMessage.getMessageBody();
        }

        Map<String, String> postParam = new HashMap<String, String>();
        postParam.put("sender", sender);
        postParam.put("message", message);

        JsonObjectRequest jsonObjReq = new JsonObjectRequest(
                Request.Method.POST,
                url,
                new JSONObject(postParam),
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        Toast.makeText(context, "SMS forwarded", Toast.LENGTH_SHORT).show();
                        WifiLockManager.releaseWifiLock();
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(context, "SMS forward failed", Toast.LENGTH_SHORT).show();
                WifiLockManager.releaseWifiLock();
            }
        }
        ){
            @Override
            public Map<String, String> getHeaders() {
                HashMap<String, String> headers = new HashMap<String, String>();
                headers.put("Content-Type", "application/json; charset=utf-8");
                return headers;
            }
        };

        queue.add(jsonObjReq);
    }
}

}

I think my answer can help you : https://stackoverflow.com/q/50628102/8572503 — exploitr, Jul 12 '18 at 09:06
This describes how you can make broadcast receiver run always. To send a specific broadcast, you can use the `LocalBroadcastManager` — exploitr, Jul 12 '18 at 09:13
invoke your http call when network changed check broadcast receiver here: https://stackoverflow.com/a/26114247/5955362 — Jaydeep Devda, Jul 12 '18 at 09:16
@JaydeepPatel I want to send out the HTTP request ASAP so I can get the forwarded message in Telegram soon. — ロジャー, Jul 12 '18 at 09:46
@Toaster Since my phone gets the SMS and vibrates, I think the broadcast receiver is working. It's just no wifi network so no HTTP call is possible. — ロジャー, Jul 12 '18 at 09:58
@y2kbug Please allow me to understand some of your procedure. Post some code, how you're doing ? → "what's not working" — exploitr, Jul 12 '18 at 10:00
@Toaster I have updated the post. Please ignore the WifiLock since it is useless. My problem now is that, I have installed the app on my phone, and put it aside, when there is a SMS received, my phone vibrates, but nothing is forwarded out. The code above works, but if the network is asleep, it is not. — ロジャー, Jul 12 '18 at 10:06

score 0 · Answer 1 · answered Jul 12 '18 at 11:10

CAUTION: Do not do network request in the broadcast receiver onReceive, because it will trigger and terminates for some time i.e for only 8 to 10 seconds. If you want to forcefully do it in onReceive means you Should use goAsync method in receiver. Or you can call any service or work manager like background service.

How to wake up the network connection by a broadcastReceiver?

1 Answers1