android-service

问题 I was developping an application and I ran into a problem. I was trying to run an asynchronous task from a service and it didn't work. It says that the code is unreachable. Now I knwo that both run in Background, but I really want one service to control several asyncronous tasks. how can I do that? Do I have to use threads? I've read this post and I really want to use the asyncronous task: Difference between Service, Async Task & Thread? Also, is it possible to execute an asynchronous task

问题 I've created an IntentService for downloading a file using Android's DownloadManager. Following is my Class: public class DownloadService extends IntentService { public DownloadService() { super("name"); } BroadcastReceiver onComplete = new BroadcastReceiver() { public void onReceive(Context ctxt, Intent intent) { function(); } }; @Override protected void onHandleIntent(Intent intent) { registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)); Utility.download

问题 I want a notification to happen whenever a child is added from my firebase database. I have the below code working within onChildAdded() while the app is running or in the background, but obviously not when it's closed. I read something about starting a service but was a bit overwhelmed. NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mRecyclerView.getContext()) .setSmallIcon(R.drawable.icon) .setContentTitle("Title") .setContentText("Content Text"); Intent

问题 I had developed a bound service as a separate project & I am trying to access the service from a client but I somehow I am getting AndroidRuntime: FATAL EXCEPTION: main 08-08 12:00:40.898 3206 3206 E AndroidRuntime: java.lang.NullPointerException 08-08 12:00:40.898 3206 3206 E AndroidRuntime: at com.test.binder.BinderServiceActivity.onClick(BinderServiceActivity.java:61) 08-08 12:00:40.898 3206 3206 E AndroidRuntime: at android.view.View.performClick(View.java:3526) 08-08 12:00:40.898 3206

问题 I'm using room to communicate data fetched by a foreground Location service with the an activity. The service connects to the viewmodel and does insert data, the activity however does not receive updated LiveData from the viewmodel, it is however able to fetch a LiveData> object at the begining, with accurate size when restarting the app. What am I missing here? I need to insert new data into the db, so if I do need to use MutableLiveData in the service and postValue, then I would have to

问题 My question is I want to verify every two hour that there is new data in the database, for that I create this user interface : <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <EditText android:id="@+id/speedAlert" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="10" android:gravity="center" android:hint="km/h" android:inputType=

问题 Xiaomi Redmi Note 3 ,Any Custom service creating using code is disable when you clear application from background, issue not happen in samsung and other phone but happen in similar phones. 回答1: You need to add your app to the list of "protected apps". On different phones this is in different places, try looking in "settings->Security". You need to explicitly enable your app to run in the background. 来源： https://stackoverflow.com/questions/45419571/xiaomi-redmi-note-3-custom-service-not

问题 I am developing a testing application on an Architecture which is based on Producer-Consumer structure. I have an producer-consumer* problem, especially if an producer callback mechanism is utilized in android service i.e. consumer. Consumers are not supposed to hold the call for more than the minimum necessary time to have the info handed over. Since the producer’s callbacks are supposed to run in a different thread than the consumer’s one. In my specific case within the callback of Producer

问题 I am trying to make a service which waits NFC tags and does something. I can do it with following code block in an activity but have no idea, even after researches, how to implement it in a service. @Override protected void onResume() { super.onResume(); // Sticky notes received from Android if enableNdefExchangeMode(); if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) { do_something(); } } I want to do this in a service. i can not use super.onResume(). What should I use

问题 I built a VoIP calling app which maintains a persistent connection with the server to listen to any incoming calls. I implemented a background service to do this. But since Oreo, this running code is now broken because of the introduction of Background Execution Limits After looking into forums, I found that some people are suggesting Convert Service to JobService and let android schedule it Doing so, my app won't be able to receive calls when it is stopped Run your operations in foreground