I have an Android app that needs to sync to the internet, but as soon as the phone goes to sleep I can't access the internet. It only happens when the user uses the "battery mode", when it turns off the data after 15 minutes. I wrote a test app and its turning the data on, but it still does connect to the server.
What I tried:
- When I turn the data manually off, then the app is turning it on and it works
- I also tried WakeLock, but it did not help.
- The alarm works as expected, even when the phone goes to sleep for hours
Tested on Motorola Atrix Android 2.3.3. I can't rely on Wifi. In real life it will sync every week. How can we make it possible?
AlarmManager:
alarm_manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pending = PendingIntent.getBroadcast(this, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
alarm_manager.setRepeating(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis(), 15000, pending);
AlarmReceiver:
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.d("MYTAG", "RECEIVED getMobileDataEnabled: " + getMobileDataEnabled(context));
if (!isOnline(context)) {
Log.d("MYTAG", "NO INET");
if (turnOnInet(context)) {
Log.d("MYTAG", "INET IS ON");
}
}
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://xxx.xxx.xxx.xxx/ping/pong/moto/");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("short_code", "ROFL"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
httpclient.execute(httppost);
Log.d("MYTAG", "POST FINISHED");
}
catch (Exception e) {
Log.e("MYTAG", "MYTAG", e);
}
}
public boolean isOnline(Context context) {
ConnectivityManager cm = (ConnectivityManager)context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null){
Log.d("MYTAG", "isAvailable: "+netInfo.isAvailable());
}
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
}
return false;
}
public boolean turnOnInet(Context context) {
ConnectivityManager mgr = (ConnectivityManager)context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
if (mgr == null) {
Log.d("MYTAG", "ConnectivityManager == NULL");
return false;
}
try {
Method setMobileDataEnabledMethod = mgr.getClass().getDeclaredMethod("setMobileDataEnabled", boolean.class);
if (null == setMobileDataEnabledMethod) {
Log.d("MYTAG", "setMobileDataEnabledMethod == null");
return false;
}
setMobileDataEnabledMethod.invoke(mgr, true);
}
catch(Exception e) {
Log.e("MYTAG", "MYTAG", e);
return false;
}
return true;
}
private boolean getMobileDataEnabled(Context context) {
ConnectivityManager mgr = (ConnectivityManager)context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
if (mgr == null) {
Log.d("MYTAG", "getMobileDataEnabled ConnectivityManager == null");
return false;
}
try {
Method method = mgr.getClass().getMethod("getMobileDataEnabled");
return (Boolean) method.invoke(mgr);
} catch (Exception e) {
Log.e("MYTAG", "MYTAG", e);
return false;
}
}
}
AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />