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我有一個應用程序，它掃描qrcode以使用ZXing庫獲取客戶端數據。 qrcode保存經度和緯度數據。掃描發生時，我可以從掃描結果中獲取信息。這是在ZXing掃描的onActivityResult中。在onActivityResult裏面，我啓動一個服務來查找用戶位置，然後將服務的結果與qrcode中的結果進行比較。然後將掃描結果以及服務中的lon和lat值存儲在手機上的sqlite數據庫中，這稱爲事務。如果數據庫爲空，則該事務將存儲到數據庫中。如果數據庫中已經存在事務，那麼該服務將運行兩次，即使我已經調用了stopService。任何可以告訴我爲什麼。Android服務在ZXing的onActivityResults中的stopService後運行
我已註銷該服務被銷燬，是否有任何理由服務可以運行後，它已被銷燬？謝謝。
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
Log.e(TAG, "in onActivityResult from ZXing");
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
Log.e(TAG, "result ok");
///////////////////////////////
tagScanTime = new DateTime();
thirtySecsAgo = tagScanTime.minus(30000);
DateTimeFormatter df = DateTimeFormat.forPattern("dd/MMM/yy h:mmaa");
String formattedScanTime = df.print(tagScanTime);
Log.e(TAG, "formatted tag scan time = " + formattedScanTime);
String formattedthirtysecsAgoTime = df.print(thirtySecsAgo);
Log.e(TAG, "formatted thity secs ago time = " + formattedthirtysecsAgoTime);
contents = intent.getStringExtra("SCAN_RESULT");
Toast.makeText(this, "scanner has found " + contents,
Toast.LENGTH_LONG).show();
locationChangereceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
LocationChangeIntent myIntent = (LocationChangeIntent) intent;
lon = myIntent.getLongitude();
lat = myIntent.getLaltitude();
Log.e(TAG, "values from service =========="+lon+" "+ lat);
// stop the service.
stopService(new Intent(context, LocationService.class));
Log.e(TAG, "just called stopService in nfcscsnActivity");
String[] splitPayload = contents.split("@");
tagType = splitPayload[0];
tagCompany = splitPayload[1];
tagPerson = splitPayload[2];
tagUserName = splitPayload[3];
////////////////////////////////following values currently not stored to DB
tagLongitude = splitPayload[4];
tagLatitude = splitPayload[5];
Log.e(TAG, "about to compare lon/lat of tag to lon/lat of service");
if(tagLongitude.toString().trim().equalsIgnoreCase(String.valueOf(lon))
&& tagLatitude.toString().trim().equalsIgnoreCase(String.valueOf(lat))){
showToast("carer not in exact position");
Log.e(TAG, "carer not in exact position");
}else{
showToast("carer is in exact position");
Log.e(TAG, "carer is in exact position");
}
processinfo();
}
};
LocalBroadcastManager.getInstance(getApplicationContext()).registerReceiver(locationChangereceiver,
new IntentFilter(LocationChangeIntent.ACTION_LOCATION_CHAHGE));
startService(new Intent(this, LocationService.class));
} else if (resultCode == RESULT_CANCELED) {
// Handle cancel
Log.e(TAG, "There's a problem with the scan. Scan result failed");
Toast.makeText(this, "There's a problem with the scan. Scan result failed",
Toast.LENGTH_LONG).show();
}
}
}