我想在acitivty的onCreate()方法上设置闹钟来调用Receiver来启动服务以从网站加载数据，但AlarmManager没有设置警报并在特定时间间隔内重复该警报这是我的代码。
这是MainActivity代码
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager()
.findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// // Set up the drawer.
// mNavigationDrawerFragment.setUp(R.id.navigation_drawer,
// (DrawerLayout) findViewById(R.id.drawer_layout));
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
// Set up the drawer.
mNavigationDrawerFragment.setUp(R.id.navigation_drawer, mDrawerLayout);
getFragmentManager().addOnBackStackChangedListener(
new OnBackStackChangedListener() {
@Override
public void onBackStackChanged() {
BaseFragment fragment = getActiveFragment();
if (fragment != null) {
fragment.resetActionBarTitle();
}
}
});
setupAlarm();
}
private void setupAlarm() {
// TODO Auto-generated method stub
Intent i = new Intent(this, AlarmReciever.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, i, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis(), AlarmManager.INTERVAL_FIFTEEN_MINUTES, pendingIntent);
}
这是AlarmReciever
public class AlarmReciever extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.d("onRecieve", "Reciever is executing");
Intent i = new Intent(context, MyService.class);
context.startService(i);
}
这是我的Service
public class MyService extends Service {
Map<String, String> map;
ServerDetails serverDetails;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
Log.d("service Created", "service created");
map = new HashMap<String, String>();
}
@SuppressWarnings("deprecation")
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
Log.d("service started", "service started");
getStats();
}
private void getStats() {
// TODO Auto-generated method stub
System.out.print("get stats is executing");
serverDetails = new ServerDetails(this);
map.clear();
Response.Listener<String> responseListner = new Response.Listener<String>() {
@Override
public void onResponse(String arg0) {
// TODO Auto-generated method stub
try {
JSONObject jobj = new JSONObject(arg0);
String result = jobj.getString("result");
if (result.contains("success")) {
map = new HashMap<String, String>();
map.put("result", result);
map.put("income_today", jobj.getString("income_today"));
map.put("income_thismonth",
jobj.getString("income_thismonth"));
map.put("income_thisyear",
jobj.getString("income_thisyear"));
map.put("tickets_open", jobj.getString("tickets_open"));
map.put("tickets_awaitingreply", String.valueOf(jobj
.getInt("tickets_awaitingreply")));
map.put("cancellations_pending",
jobj.getString("cancellations_pending"));
map.put("todoitems_due",
jobj.getString("todoitems_due"));
map.put("networkissues_open",
jobj.getString("networkissues_open"));
map.put("orders_pending",
jobj.getString("orders_pending"));
map.put("billableitems_uninvoiced",
jobj.getString("billableitems_uninvoiced")
+ " Overdue");
} else if (result.contains("error")) {
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (Integer.parseInt(map.get("tickets_awaitingreply")) > 0) {
showNotification();
}
}
};
StringRequest request = new StringRequest(Method.POST,
serverDetails.getUrl(), responseListner,
MyErrorListner.getListnerNoDialog(this)) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
// TODO Auto-generated method stub
Map<String, String> map = serverDetails.getParameters();
map.put("action", "getstats");
Log.d("params map in service", map.toString());
return map;
}
};
AppController.getInstance().addToRequestQueue(request);
}
protected void showNotification() {
// TODO Auto-generated method stub
System.out.print("show notification is calling");
Uri soundUri = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0);
@SuppressWarnings("deprecation")
Notification mNofification = new Notification.Builder(this)
.setContentTitle("New Ticket")
.setContentText("New Tickets Awaiting Reply")
.setSmallIcon(R.drawable.ic_bill).setContentIntent(pIntent)
.setSound(soundUri)
/*
* .addAction(R.drawable.ic_bill, "View", pIntent) .addAction(0,
* "Remind", pIntent)
*/.getNotification();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(0, mNofification);
}
}
答案 0 :(得分：0)
删除setAlarm()方法中的所有内容，然后只需粘贴此代码即可。
Intent i = new Intent(this, MyService.class);
if (PendingIntent.getService(this, 0, i, PendingIntent.FLAG_NO_CREATE) == null) {
PendingIntent pendingIntent = PendingIntent.getService(this, 0, i,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 0,
AlarmManager.INTERVAL_FIFTEEN_MINUTES, pendingIntent);
Log.d("alarm", "alarm set successfully");
} else {
Log.d("alarm", "alarm already set");
}
你必须检查警报是否已经存在。如果你不检查它，那么每当调用onCreate()时，setalarm将一次又一次地设置警报。此代码只会设置一次警报，您的服务将开始推送通知。