[英]Music service not working after some second when app in background in Oreo
[英]Run API every second in Background after Android App is killed in Oreo version
我正在嘗試構建一個每秒運行一次的Android應用程序,當應用程序關閉或終止時,它也應該在后台連續運行。 當API響應條件得到滿足時,它應該顯示一個Local Notification ..
我已將Service Class用於后台任務。 在奧利奧版(8.1v)以外的所有版本中都運行良好
我查看了與之相關的網站和示例,發現關閉或終止該應用后,我們無法在Oreo版本中執行后台任務。
因此,我嘗試使用startForeground(),但也無法正常工作。經過多次嘗試,最后我在這里提出了這個問題。
因此,當應用關閉時,請幫助我在后台運行API。
MainActivty.class
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
ContextCompat.startForegroundService(this, new Intent(this,MyService.class));
} else {
startService(new Intent(this,MyService.class));
}
}
MyService.class
public class MyService extends Service {
public static final int notify = 3000; //interval between two services(Here Service run every 5 Minute)
private Handler mHandler = new Handler(); //run on another Thread to avoid crash
private Timer mTimer = null; //timer handling
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
@Override
public void onCreate() {
super.onCreate();
if (mTimer != null) // Cancel if already existed
mTimer.cancel();
else
mTimer = new Timer(); //recreate new
mTimer.scheduleAtFixedRate(new TimeDisplay(), 0, notify); //Schedule task
}
//class TimeDisplay for handling task
class TimeDisplay extends TimerTask {
@Override
public void run() {
mHandler.post(new Runnable() {
@Override
public void run() {
new ApiCallAsyncTask().execute(URL);
}
});
}
}
}
在ApiCallAsyncTask類中調用的Notification Method
Notification notif;
@TargetApi(Build.VERSION_CODES.O)
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public void notification(String Name, String time,String mId,int id){
Intent intent = new Intent(MyService.this, MainActivity.class);
String CHANNEL_ID = String.valueOf(id);
PendingIntent pendingIntent = PendingIntent.getActivity(MyService.this, 100, intent, PendingIntent.FLAG_ONE_SHOT);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, Name, NotificationManager.IMPORTANCE_DEFAULT);
notif = new Notification.Builder(MyService.this)
.setContentIntent(pendingIntent)
.setContentTitle("Reminder")
.setContentText("hello")
.setSmallIcon(R.drawable.logo)
.setOnlyAlertOnce(true)
.setColor(ContextCompat.getColor(MyService.this, R.color.colorPrimaryDark))
.setChannelId(CHANNEL_ID)
.build();
notificationManager.createNotificationChannel(mChannel);
}else {
notif = new Notification.Builder(MyService.this)
.setContentIntent(pendingIntent)
.setContentTitle("Reminder")
.setContentText("hello")
.setSmallIcon(R.drawable.logo)
.setOnlyAlertOnce(true)
.setColor(ContextCompat.getColor(MyService.this, R.color.colorPrimaryDark))
.build();
}
notif.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(id, notif);
startForeground(1, notif);
}
謝謝..
您可以結合使用JobIntentService + AlarmManager (用於計划)或JobScheduler API 。
但我強烈建議您使用Firebase Cloud Messaging替換您的方法。 因此,您將把業務邏輯放在服務器端,並在特殊情況下通知客戶端。
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