我在每個應用程序啓動updaiting數據庫,我用IntentService
前,但數據被更新之前,我的活動已開始,所以數據列表是空的,我已經rewriten它使用Service
(我已經創建了自己的Service
像個IntentService
,所以我可以控制好由Service
創建的線程)。正如你首先看到的,我正在保存數據,並且只有在這之後,我纔開始我的活動。但是,我的活動開始之前,無論如何保存數據,任何建議,爲什麼,或者我該如何解決這個問題?無法保存和使用服務顯示數據/ IntentService正確
此外
如果你有一些的expirience與ORM /數據庫工作異步這將是巨大的,我只是想學習如何與數據庫正常工作。任何建議都是有好處的。
public class DatabaseWorkService extends Service {
private ServiceHandler mServiceHandler;
private DatabaseReference mDatabase;
private ConnectivityManager conMan;
private NetworkInfo netInfo;
private String currentTask;
private Intent tempIntent;
private Looper mServiceLooper;
private ResultReceiver resultReceiver;
private Context context =this;
public DatabaseWorkService delegate = null;
// Handler that receives messages from the thread
private final class ServiceHandler extends Handler {
public ServiceHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
if(msg.getData()!=null) {
switch (msg.getData().getString(Utils.INTENT_SERVICE_INVOKE)) {
case Utils.LOAD_All_DATA: {
saveActivities();
savePersons();
savePictureData();
Intent intent = new Intent(context, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Log.e("order", "forth");
break;
}
case Utils.READ_ACTIONS_DATA: {
readActionData();
break;
}
case Utils.READ_PERSONS_DATA: {
readPersonsData();
break;
}
}
}
stopSelf(msg.arg1);
}
}
@Override
public void onCreate() {
// Start up the thread running the service. Note that we create a
// separate thread because the service normally runs in the process's
// main thread, which we don't want to block. We also make it
// background priority so CPU-intensive work will not disrupt our UI.
HandlerThread thread = new HandlerThread("ServiceStartArguments");
thread.start();
// Get the HandlerThread's Looper and use it for our Handler
mServiceLooper = thread.getLooper();
mServiceHandler = new ServiceHandler(mServiceLooper);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.e("service","service started");
Log.e("data",intent.getStringExtra(Utils.INTENT_SERVICE_INVOKE));
Bundle bundle = new Bundle();
bundle.putString(Utils.INTENT_SERVICE_INVOKE,intent.getStringExtra(Utils.INTENT_SERVICE_INVOKE));
// For each start request, send a message to start a job and deliver the
// start ID so we know which request we're stopping when we finish the job
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = startId;
msg.setData(bundle);
mServiceHandler.sendMessage(msg);
// If we get killed, after returning from here, restart
return START_STICKY;
}
@Override
public void onDestroy() {
Toast.makeText(this, "service done", Toast.LENGTH_SHORT).show();
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
saveActivities內的活動( ); savePersons(); savePictureData();這些方法是否返回任何值。如果不是你能做到這一點 –
他們,不返回任何值,i'l嘗試在一個小時,但它怎麼可能改變behavoiur? – Turbozanik
@jiteshmohite我加入的返回值,沒有什麼chaged。 – Turbozanik