I'm new to android programming and I've been doing an application for myself so far. In this app I want when it goes into the background, that is, when I exit the application without calling the onDestroy () method, a task will start to run.
When I exit the application it starts a timer 15 minutes, when the time runs out it will be called a webservice to check if I have any new alerts.
I would like to know if I can indicate some library or tutorial that I can use
Hello,
You can create a service:
A Service is an application component that can perform long operations and does not provide a user interface. Another component of the application can start a service and it will continue to run in the background even if the user switches to another application. In addition, a component can bind to a service to interact with it and even establish interprocess communication (IPC). For example, a service can handle network transactions, play music, perform file I / O, or interact with a content provider, all from the background .... link
A simple example of what you need:
Create the service class
public class TarefaBackground extends IntentService {
/**
* Creates an IntentService. Invoked by your subclass's constructor.
*
* @param name Used to name the worker thread, important only for debugging.
*/
long seconds;
public Sleeper(String name) {
super(name);
}
public Sleeper() {
super("");
}
@Override
protected void onHandleIntent(@Nullable Intent intent) {
long millis = 900000;
Toast.makeText(this, "OnHandle", Toast.LENGTH_LONG).show();
while(true) {
try {
Thread.sleep(millis);
System.out.println("executou ação");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
Add within the Application tag in manifests
<service
android:name=".TarefaBackground">
</service>
Finally in mainActivity
@Override
protected void onPause() {
super.onPause();
Intent intent= new Intent(MainActivity.this,TarefaBackground.class);
startService(intent);
}