Android的服务停止运行后少顷请帮助 [英] Android Service Stops Running After Awhile Please Help
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问题描述
我有一个服务永远循环但不知何故，随着时间的推移，要么死亡或者循环结束。我一直在这一段时间，任何意见或建议将是非常美联社preciative。谢谢！
下面是如何启动服务
意图myIntent =新意图（这一点，MyService.class）;
的PendingIntent = PendingIntent.getService（在此，0，myIntent，0）;
AlarmManager alarmManager =（AlarmManager）getSystemService（ALARM_SERVICE）;
台历挂历= Calendar.getInstance（）;
calendar.setTimeInMillis（System.currentTimeMillis的（））;
calendar.add（Calendar.SECOND，10）;
alarmManager.set（AlarmManager.RTC_WAKEUP，calendar.getTimeInMillis（），的PendingIntent）;
这里是Onstartcommand的服务
@覆盖
公众诠释onStartCommand（意向意图，诠释旗帜，INT startId）
{
尝试{
//Toast.makeText（getApplicationContext（），服务启动，Toast.LENGTH_LONG）.show（）;
@燮pressWarnings（{rawtypes，未}）
AsyncTask的＆LT;太虚，太虚，太虚＆GT; AsyncTask的=新的AsyncTask（）{
@覆盖
在preExecute保护无效（）{
} @覆盖
保护无效doInBackground（对象...对象）{
//从SQL不是静态值获取用户名。静态值可能会死。
字符串username =;
SQLiteDatabase分贝;
DB = openOrCreateDatabase（DB，SQLiteDatabase.CREATE_IF_NECESSARY，NULL）;
db.setVersion（1）;
db.setLocale（Locale.getDefault（））;
db.setLockingEnabled（真）;
光标CUR = db.query（用户数据，NULL，NULL，NULL，NULL，NULL，NULL）;
cur.moveToFirst（）;
而（cur.isAfterLast（）== FALSE）{
用户名=（cur.getString（cur.getColumnIndex（用户名）））;
cur.moveToNext（）;
}
cur.close（）;
db.close（）;
INT messagecount = -1;
//开始主循环检查新邮件
/ *
*计数开始于-1，则得到再算上1，如果是
*添加到newcount newcount是＆GT;比去年的消息计数
*通知uesers。
* /
对于（;;）{ 尝试{
字符串结果=;
// Shownotify（）; //将循环中的所有时间：回路测试
HttpClient的客户端=新DefaultHttpClient（）;
HttpPost要求=新HttpPost（HTTP：GetInfo.php）;
清单＆LT;＆的NameValuePair GT; postParameters =新的ArrayList＆LT;＆的NameValuePair GT;（）;
postParameters.add（新BasicNameValuePair（用户名，用户名））;
UrlEn codedFormEntity formEntity =新UrlEn codedFormEntity（postParameters）;
request.setEntity（formEntity）;
HTT presponse响应= client.execute（请求）;
HttpEntity实体= response.getEntity（）;
InputStream为= entity.getContent（）;
读者的BufferedReader =新的BufferedReader（新
InputStreamReader的（是ISO-8859-1），8）;
StringBuilder的SB =新的StringBuilder（）;
串线= NULL;
而（（行= reader.readLine（））！= NULL）{
sb.append（行+\\ n）; }
is.close（）;
结果= sb.toString（）;
JSONArray jArray =新JSONArray（结果）;
INT newcount = 0;
的for（int i = 0; I＆LT; jArray.length（）;我++）{
JSONObject的json_data = jArray.getJSONObject（I）
newcount = json_data.getInt（反）;
}
如果（MyGlobalInformation.getStopLoop（）==真）{
打破;
}
如果（newcount＆GT; messagecount和放大器;＆安培;！messagecount = -1）{
messagecount = newcount;
Shownotify（）;
}
其他{
messagecount = newcount;
}
} 赶上（例外五）{
HomeScreen.setStartedState（假）;
} } 返回null;
}
@覆盖
保护无效onPostExecute（对象o）{
HomeScreen.setStartedState（假）;
}
};
asyncTask.execute（）; }
赶上（例外五）{
HomeScreen.setStartedState（假）;
} 返回START_STICKY;
}
解决方案
您服务没有前台，所以它可以在任何时候被杀死。您可以使用 Service.startForeground 解决问题。您也可以通过返回 START_REDELIVER_INTENT 从 onStartCommand ，它将然后用同样的意图再次打电话给你的服务。请查看文档的这部分有关服务更多信息生命周期。
I have a service in a for ever loop but somehow over time it either dies or the loop ends. I been at this for a while, any advice or suggestions would be very appreciative. Thanks!
Here is how the service is started
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);
And here is the Onstartcommand for the Service
@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;
}
解决方案
Your service isn't foreground, so it can be killed at any time. You can solve the problem by using Service.startForeground. You can also fix by returning START_REDELIVER_INTENT from onStartCommand, which will then call your service again with the same intent. Check out this part of the documentation for more info on the service lifecycle.
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