我每隔15分钟启动一次警报服务，并在每15分钟后将数据发送到服务器。但是当无法使用wifi时，我无法将数据发送到服务器。我希望在15分钟后将数据存储在本地数据库中，并在设备联机时发送到服务器。
我的应用在gps禁用时停止工作，我想在禁用gps时发出提醒。
这是服务代码
public class LocationService extends Service implements LocationListener {
public static String LOG = "Log";
JSONParser jsonParser = new JSONParser();
private final Context mContext;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0; // 0 meters
private static final long MIN_TIME_BW_UPDATES = 1000; // 1 second
protected LocationManager locationManager;
private SQLiteHandler db;
public LocationService(Context context) {
this.mContext = context;
}
public LocationService() {
super();
mContext = LocationService.this;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
db = new SQLiteHandler(getApplicationContext());
HashMap<String, String> user = db.getUserDetails();
String uid = user.get("uid");
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
String IMEINo =sharedPreferences.getString("IMEI NO",null);
SimpleDateFormat simpleDateFormat =
new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZZZZZ");
Calendar calendar = Calendar.getInstance();
Date now = calendar.getTime();
String deviceTimeStamp = simpleDateFormat.format(now);
Toast.makeText(this,( "latitude" + latitude +"longitude" + longitude +uid), Toast.LENGTH_LONG).show();
Log.i(LOG, "Service started");
Log.i("asd", "This is sparta");
new MyAsyncTask().execute((Double.toString(Double.parseDouble(uid))),
(Double.toString(getLocation().getLongitude())),
(Double.toString(getLocation().getLatitude())),
(Double.toString(Double.parseDouble(IMEINo))),
(deviceTimeStamp));
return START_STICKY;
}
@Override
public void onCreate() {
super.onCreate();
Log.i(LOG, "Service created");
}
@Override
public void onDestroy() {
super.onDestroy();
Log.i(LOG, "Service destroyed");
}
private class MyAsyncTask extends AsyncTask<String, String, String>{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
postData(params[0],params[1],params[2],params[3],params[4]);
return "call";
}
protected void onPostExecute(String result){
Toast.makeText(getApplicationContext(), "command sent", Toast.LENGTH_LONG).show();
}
public void postData(String uid, String longitude, String latitude, String IMEI, String deviceTimeStamp) {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://enftracker.com/app_script/connect1.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("uid", uid));
nameValuePairs.add(new BasicNameValuePair("longitude", longitude));
nameValuePairs.add(new BasicNameValuePair("latitude", latitude));
nameValuePairs.add(new BasicNameValuePair("IMEI", IMEI));
nameValuePairs.add(new BasicNameValuePair("deviceTimeStamp", deviceTimeStamp));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
if (isNetworkEnabled) {
//updates will be send according to these arguments
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return null;
}
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
答案 0 :(得分：1)
您可以使用此方法
@Override
public void onProviderEnabled(String provider) {
if (provider.equals(LocationManager.GPS_PROVIDER) {
boolean isEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
}
}