跨进程启动后台服务

public class MyService extends Service {
    private static final String CHANNEL_ID = "100";
    private static final String CHANNEL_NAME = "APK1";

    public MyService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public void onCreate() {
        super.onCreate();
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        manager.createNotificationChannel(channel);
        Notification notification = new Notification.Builder(getApplicationContext(), CHANNEL_ID).build();
        startForeground(1, notification);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
            Timer timer = new Timer();
            timer.schedule(new TimerTask() {
                @Override
                public void run() {
                    Intent intent = new Intent();
                    intent.setAction("android.intent.action.START_SERVICE");
                    第一个参数是包名 第二个参数是包名加类名
                    intent.setComponent(new ComponentName("com.example.apk2","com.example.apk2.MyService"));
                    intent.putExtra("msg","跨进程启动service");
                    startForegroundService(intent);
                    Log.e(getClass().getName(), "startService end");
                }
            },30 * 1000);
        return super.onStartCommand(intent, flags, startId);
    }
}