android o android8.0 startforegroundservice startforegroundservice() did not then call service.star

转载自：https://blog.csdn.net/legend12300/article/details/106413359

开机自启的服务出现的问题。

以下为原文：

解决context.startforegroundservice() did not then call service.startforeground()

原因：

1. Android 8.0 系统不允许后台应用创建后台服务，故只能使用Context.startForegroundService()启动服务
2. 创建服务后，应用必须在5秒内调用该服务的 startForeground() 显示一条可见通知，声明有服务在挂着，不然系统会停止服务 + ANR 套餐送上。
3. Notification 要加 Channel，系统的要求。

解决步骤：

Service.java 中

1. @Override

2. public void onCreate() {

3. super.onCreate();

4. if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.O) {

5. startFG();

6. }

7. }

8.  

9. private void startFG() {

10. NotificationBuilder builder = new NotificationBuilder(this);

11. final Notification notification = builder.buildNotification();

12. startForeground(NotificationBuilder.NOTIFICATION_ID, notification);

13. }

NotificationBuilder.java

1. public final class NotificationBuilder {

2. public static final String NOTIFICATION_CHANNEL_ID = "com.demo.CHANNEL_ID";

3. public static final int NOTIFICATION_ID = 0xD660;

4.  

5. private final Context mContext;

6. private final NotificationManager mNotificationManager;

7.  

8. public NotificationBuilder(Context context) {

9. mContext = context;

10. mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

11. }

12.  

13. public Notification buildNotification() {

14. if (shouldCreateNowPlayingChannel()) {

15. createNowPlayingChannel();

16. }

17.  

18. NotificationCompat.Builder builder = new NotificationCompat.Builder(mContext, NOTIFICATION_CHANNEL_ID);

19.  

20. return builder.setSmallIcon(R.drawable.all_app_takeaway_icon)

21. .setContentTitle("")

22. .setContentTitle("")

23. .setOnlyAlertOnce(true)

24. .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)

25. .build();

26. }

27.  

28. @RequiresApi(api = Build.VERSION_CODES.O)

29. private boolean nowPlayingChannelExists() {

30. return mNotificationManager.getNotificationChannel(NOTIFICATION_CHANNEL_ID) != null;

31. }

32.  

33. private boolean shouldCreateNowPlayingChannel() {

34. return Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && !nowPlayingChannelExists();

35. }

36.  

37. @RequiresApi(api = Build.VERSION_CODES.O)

38. private void createNowPlayingChannel() {

39. final NotificationChannel channel = new NotificationChannel(

40. NOTIFICATION_CHANNEL_ID,

41. "当前播放",

42. NotificationManager.IMPORTANCE_LOW);

43. channel.setDescription("当前播放的电台");

44. mNotificationManager.createNotificationChannel(channel);

45. }

46. }

还要注意：

AndroidManifest.xml  中配置permission

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

启动Service方法：

1. //后台启动service

2. if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.O) {

3. Intent serviceIntent = new Intent(this, DemoService.class);

4. startForegroundService(serviceIntent);

5. } else {

6. Intent serviceIntent = new Intent(this, DemoService.class);

7. startService(serviceIntent);

8. }