Question

我是Android编程的新手，我想让服务可以从服务器获取数据，以及数据是否更新。我的申请会显示通知。但是，我的应用程序只有在第一次打开时才显示通知，服务正在运行，我认为服务什么都不做。谢谢你的帮助。

这是我的服务代码：

public class ServiceBaru extends Service {
    SharedPreferences sharedPreferences3;
    SharedPreferences.Editor editor3;
    SharedPreferences sharedPreferences2;
    SharedPreferences.Editor editor2;
    Timer time = new Timer();
    String url_baru, url_default, url_pakai;
    int idl_modif, ids_modif;
    static String idl = "";
    static String ids = "";
    Context mContext;
    public ServiceBaru() {
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Handler handler = new Handler();
        sharedPreferences2 = getSharedPreferences("semua_url", MODE_PRIVATE);
        url_baru = sharedPreferences2.getString("url_masuk", "");
        sharedPreferences3 = getSharedPreferences("id_keluar", MODE_PRIVATE);
        editor3 = sharedPreferences3.edit();
        url_default = "192.168.1.215";
        if(url_baru.equals("")){
            url_pakai = url_default;
        }
        else {
            url_pakai = url_baru;
        }
    handler.postDelayed(new Runnable() {

            @Override
            public void run() {
                //performe the deskred task
                OkHttpClient client = new OkHttpClient();
                Request request = new Request.Builder().url("http://" + url_pakai + "/www/index.php/ambilid").build();
                client.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        //Sengaja Kosong
                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        //idl Menunjukkan Id Baru
                        // ids menunjukkan id lama dari shared preferences
                        sharedPreferences3 = getSharedPreferences("id_keluar", MODE_PRIVATE);
                        editor3 = sharedPreferences3.edit();
                        idl = response.body().string();
                        idl_modif = Integer.parseInt(idl);
                        ids_modif = sharedPreferences3.getInt("idpertama", 0);
                        if(ids_modif==0) {
                            ids = idl;
                            ids_modif = Integer.parseInt(ids);
                            editor3.putInt("idpertama", ids_modif);
                            editor3.commit();
                        }
                        else{
                            if(idl_modif>ids_modif){
                                NotificationCompat.Builder notif = new NotificationCompat.Builder(getApplicationContext()).setSmallIcon(R.drawable.logoutragunung).setContentTitle("UTRAPOS Mobile").setContentText("Ada Data Baru Yang Perlu Approve");
                                Intent notifklik = new Intent(getApplicationContext(), MainActivity.class);
                                PendingIntent contentnotif = PendingIntent.getActivity(getApplicationContext(), 0, notifklik, PendingIntent.FLAG_UPDATE_CURRENT);
                                notif.setContentIntent(contentnotif);
                                NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
                                notificationManager.notify(1, notif.build());
                                editor3.putInt("idpertama", idl_modif);
                                editor3.commit();
                                System.out.println(idl_modif + ids_modif);
                            }
                        }
                    }
                });
            }
        }, 1000);
        System.out.println("Hallo Dari Services");
        return START_STICKY;
    }



    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    @Override
    public IBinder onBind(Intent intent) {

        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

}

Answer 1

handler.postDelayed()

这将只运行您的代码一次。即使你通过在1000毫秒后调用相同的函数来循环它也不会工作。您必须使用JobSheduler定期触发您的任务。

如何使服务可以通过okhttp从服务器获得响应？

1 个答案: