Detect CONNECTIVITY CHANGE in Android 7 and above when app is killed/in background
Nougat and Above: We have to use JobScheduler and JobService for Connection Changes.
All I can divide this into three steps.
Register JobScheduler inside activity. Also, Start JobService( Service to handle callbacks from the JobScheduler. Requests scheduled with the JobScheduler ultimately land on this service's "onStartJob" method.)
public class NetworkConnectionActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_network_connection);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
scheduleJob();
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private void scheduleJob() {
JobInfo myJob = new JobInfo.Builder(0, new ComponentName(this, NetworkSchedulerService.class))
.setRequiresCharging(true)
.setMinimumLatency(1000)
.setOverrideDeadline(2000)
.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
.setPersisted(true)
.build();
JobScheduler jobScheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
jobScheduler.schedule(myJob);
}
@Override
protected void onStop() {
// A service can be "started" and/or "bound". In this case, it's "started" by this Activity
// and "bound" to the JobScheduler (also called "Scheduled" by the JobScheduler). This call
// to stopService() won't prevent scheduled jobs to be processed. However, failing
// to call stopService() would keep it alive indefinitely.
stopService(new Intent(this, NetworkSchedulerService.class));
super.onStop();
}
@Override
protected void onStart() {
super.onStart();
// Start service and provide it a way to communicate with this class.
Intent startServiceIntent = new Intent(this, NetworkSchedulerService.class);
startService(startServiceIntent);
}
}
The service to start and finish the job.
public class NetworkSchedulerService extends JobService implements
ConnectivityReceiver.ConnectivityReceiverListener {
private static final String TAG = NetworkSchedulerService.class.getSimpleName();
private ConnectivityReceiver mConnectivityReceiver;
@Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "Service created");
mConnectivityReceiver = new ConnectivityReceiver(this);
}
/**
* When the app's NetworkConnectionActivity is created, it starts this service. This is so that the
* activity and this service can communicate back and forth. See "setUiCallback()"
*/
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(TAG, "onStartCommand");
return START_NOT_STICKY;
}
@Override
public boolean onStartJob(JobParameters params) {
Log.i(TAG, "onStartJob" + mConnectivityReceiver);
registerReceiver(mConnectivityReceiver, new IntentFilter(Constants.CONNECTIVITY_ACTION));
return true;
}
@Override
public boolean onStopJob(JobParameters params) {
Log.i(TAG, "onStopJob");
unregisterReceiver(mConnectivityReceiver);
return true;
}
@Override
public void onNetworkConnectionChanged(boolean isConnected) {
String message = isConnected ? "Good! Connected to Internet" : "Sorry! Not connected to internet";
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
}
Finally, The receiver class which checks the network connection changes.
public class ConnectivityReceiver extends BroadcastReceiver {
private ConnectivityReceiverListener mConnectivityReceiverListener;
ConnectivityReceiver(ConnectivityReceiverListener listener) {
mConnectivityReceiverListener = listener;
}
@Override
public void onReceive(Context context, Intent intent) {
mConnectivityReceiverListener.onNetworkConnectionChanged(isConnected(context));
}
public static boolean isConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager)
context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
return activeNetwork != null && activeNetwork.isConnectedOrConnecting();
}
public interface ConnectivityReceiverListener {
void onNetworkConnectionChanged(boolean isConnected);
}
}
Don't forget to add permission and service inside manifest file.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.yourpackagename">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<!-- Always required on api < 21, needed to keep a wake lock while your job is running -->
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<!-- Required on api < 21 if you are using setRequiredNetworkType(int) -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<!-- Required on all api levels if you are using setPersisted(true) -->
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".connectivity.NetworkConnectionActivity"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Define your service, make sure to add the permision! -->
<service
android:name=".connectivity.NetworkSchedulerService"
android:exported="true"
android:permission="android.permission.BIND_JOB_SERVICE"/>
</application>
</manifest>
Please refer below links for more info.
https://github.com/jiteshmohite/Android-Network-Connectivity
https://github.com/evant/JobSchedulerCompat
https://github.com/googlesamples/android-JobScheduler
https://medium.com/@iiro.krankka/its-time-to-kiss-goodbye-to-your-implicit-broadcastreceivers-eefafd9f4f8a
The best way to grab Connectivity change Android Os 7 and above is register your ConnectivityReceiver broadcast in Application class like below, This helps you to get changes in background as well until your app alive.
public class MyApplication extends Application {
private ConnectivityReceiver connectivityReceiver;
private ConnectivityReceiver getConnectivityReceiver() {
if (connectivityReceiver == null)
connectivityReceiver = new ConnectivityReceiver();
return connectivityReceiver;
}
@Override
public void onCreate() {
super.onCreate();
registerConnectivityReceiver();
}
// register here your filtters
private void registerConnectivityReceiver(){
try {
// if (android.os.Build.VERSION.SDK_INT >= 26) {
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
//filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
//filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
//filter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);
registerReceiver(getConnectivityReceiver(), filter);
} catch (Exception e) {
MLog.e(TAG, e.getMessage());
}
}
}
And then in manifest
<application
android:name=".app.MyApplication"/>
Here is your ConnectivityReceiver.java
public class ConnectivityReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, final Intent intent) {
MLog.v(TAG, "onReceive().." + intent.getAction());
}
}
That's how i did it. I have created a IntentService
and in onCreate
method and I have registered networkBroadacst
which check for internet connection.
public class SyncingIntentService extends IntentService {
@Override
public void onCreate() {
super.onCreate();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
networkBroadcast=new NetworkBroadcast();
registerReceiver(networkBroadcast,
new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
}
}
@Override
public int onStartCommand(@Nullable Intent intent, int flags, int startId) {
onHandleIntent(intent);
return START_STICKY;
}
}
This is my broadcast class
public class NetworkBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Constants.isInternetConnected(context)) {
// Toast.makeText(context, "Internet Connect", Toast.LENGTH_SHORT).show();
context.startService(new Intent(context, SyncingIntentService.class));
}
else{}
}
}
In this way you can check internet connection in whether your app is in foreground or background in nougat.