我正在构建一个Android应用,需要从后台开始活动。我正在使用ForegroundStarter来扩展Service来完成此任务。我有一个活动Adscreen.class,需要从我的前台服务中运行。活动Adscreen.class在除Android 10以外的所有Android版本上都可以正常运行(从后台开始)。
ForeGroundStarter.class
public class ForeGroundStarter extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.d("sK", "Inside Foreground");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("sK", "Inside Foreground onStartCommand");
Intent notificationIntent = new Intent(this, Adscreen.class);
PendingIntent pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
Notification notification =
null;
//Launching Foreground Services From API 26+
notificationIntent = new Intent(this, Adscreen.class);
pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String NOTIFICATION_CHANNEL_ID = "com.currency.usdtoinr";
String channelName = "My Background Service";
NotificationChannel chan = null;
chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE);
chan.setLightColor(Color.BLUE);
chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
assert manager != null;
manager.createNotificationChannel(chan);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
notification = notificationBuilder.setOngoing(true)
.setSmallIcon(R.drawable.nicon)
.setContentTitle("")
.setPriority(NotificationManager.IMPORTANCE_MIN)
.setCategory(Notification.CATEGORY_SERVICE)
.build();
startForeground(2, notification);
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
Log.d("sk", "After startforeground executed");
}
else //API 26 and lower
{
notificationIntent = new Intent(this, Adscreen.class);
pendingIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification =
new Notification.Builder(this)
.setContentTitle("")
.setContentText("")
.setSmallIcon(R.drawable.nicon)
.setContentIntent(pendingIntent)
.setTicker("")
.build();
startForeground(2, notification);
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
}
return super.onStartCommand(intent, flags, startId);
}
}
我了解到,从Android 10的后台启动活动存在一些限制。此代码似乎不再起作用。 https://developer.android.com/guide/components/activities/background-starts
Intent dialogIntent = new Intent(this, Adscreen.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
有任何变通办法可从Android 10的后台启动活动吗?