我在for循环中有一个服务但不知何故随着时间的推移它会死或循环结束。我已经在这一段时间了,任何建议或建议都会非常感激。谢谢!
以下是服务的启动方式
Intent myIntent = new Intent(this, MyService.class);
pendingIntent = PendingIntent.getService(this, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
这是服务的Onstart命令
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
try{
//Toast.makeText(getApplicationContext(), " Service Started", Toast.LENGTH_LONG).show();
@SuppressWarnings({ "rawtypes", "unchecked" })
AsyncTask<Void, Void, Void> asyncTask = new AsyncTask() {
@Override
protected void onPreExecute() {
}
@Override
protected Void doInBackground(Object... objects) {
//Get Username from sql not static value. Static value could die.
String Username = "";
SQLiteDatabase db;
db = openOrCreateDatabase(".db",SQLiteDatabase.CREATE_IF_NECESSARY,null);
db.setVersion(1);
db.setLocale(Locale.getDefault());
db.setLockingEnabled(true);
Cursor cur =db.query("userdata", null, null, null, null, null, null);
cur.moveToFirst();
while(cur.isAfterLast()==false){
Username = (cur.getString(cur.getColumnIndex("username")));
cur.moveToNext();
}
cur.close();
db.close();
int messagecount = -1;
//START MAIN LOOP TO CHECK NEW MESSAGES
/*
* Counts starts at -1 then gets count then if 1 is
* added to newcount newcount is > than last message count
* notify uesers.
*/
for(;;){
try{
String result = "";
//Shownotify();//WILL LOOP ALL THE TIME: LOOP TEST
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost("http:GetInfo.php");
List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("UserName", Username));
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
request.setEntity(formEntity);
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
BufferedReader reader = new BufferedReader(new
InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while((line = reader.readLine())!= null){
sb.append(line + "\n");
}
is.close();
result = sb.toString();
JSONArray jArray = new JSONArray(result);
int newcount = 0;
for(int i=0;i<jArray.length(); i++){
JSONObject json_data = jArray.getJSONObject(i);
newcount = json_data.getInt("counter");
}
if(MyGlobalInformation.getStopLoop() == true){
break;
}
if(newcount > messagecount && messagecount != -1){
messagecount = newcount;
Shownotify();
}
else{
messagecount = newcount;
}
}
catch(Exception e){
HomeScreen.setStartedState(false);
}
}
return null;
}
@Override
protected void onPostExecute(Object o) {
HomeScreen.setStartedState(false);
}
};
asyncTask.execute();
}
catch(Exception e){
HomeScreen.setStartedState(false);
}
return START_STICKY;
}
答案 0 :(得分:4)
您的服务不是前台,因此可以随时终止。您可以使用Service.startForeground
解决问题。您也可以通过从onStartCommand
返回START_REDELIVER_INTENT
进行修复,然后{...}}将再次以相同的意图调用您的服务。有关服务生命周期的更多信息,请查看文档的this part。