我创建了服务，每秒检查一次区域的接近程度。它开火了＃34;进入该地区＆＃34;正确。但是，当我离开地区时，它不断发出相同的信息＆＃34;进入该地区＆＃34; 。我在onLocationChanged（）方法中添加了邻近度。
这是服务代码：
public class GPSTrackerService extends Service implements LocationListener {
private Context mContext;
LocationListener loc;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
PendingIntent pendingIntent;
private BroadcastReceiver mybroadcast;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1; // 10 meters
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
@Override
public void onStart(Intent intent, int startid) {
this.mContext=getBaseContext();
getLocation();
}
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) {
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) {
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();
Toast.makeText(this, "Proximity Service Stopped", Toast.LENGTH_LONG).show();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(GPSTrackerService.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
Toast.makeText(this, "loc changed", Toast.LENGTH_LONG).show();
Intent proximityIntent = new Intent("in.wptrafficanalyzer.activity.proximity");
pendingIntent= PendingIntent.getBroadcast(mContext, 0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK);
locationManager.addProximityAlert(31.4668732, 74.2719786, MIN_DISTANCE_CHANGE_FOR_UPDATES, -1, pendingIntent);
IntentFilter filter = new IntentFilter("in.wptrafficanalyzer.activity.proximity");
registerReceiver(new ProximityIntentReceiver(), filter);
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onDestroy() {
try{
unregisterReceiver(new ProximityIntentReceiver());
}catch(IllegalArgumentException e){
}
}
}
这是我的用于触发通知/吐司的Broadcat接收器
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
boolean proximity_entering = intent.getBooleanExtra(LocationManager.KEY_PROXIMITY_ENTERING, false);
if(proximity_entering){
Toast.makeText(context,"Entering the region" ,Toast.LENGTH_LONG).show();
notificationTitle="Proximity - Entry";
notificationContent="Entered the region";
tickerMessage = "Entered the region";
}else{
Toast.makeText(context,"Exiting the region" ,Toast.LENGTH_LONG).show();
notificationTitle="Proximity - Exit";
notificationContent="Exited the region";
tickerMessage = "Exited the region";
}
Intent notificationIntent = new Intent(context,NotificationView.class);
notificationIntent.putExtra("content", notificationContent );
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationManager nManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context)
.setWhen(System.currentTimeMillis())
.setContentText(notificationContent)
.setContentTitle(notificationTitle)
.setSmallIcon(R.drawable.ic_launcher)
.setAutoCancel(true)
.setTicker(tickerMessage)
.setContentIntent(pendingIntent);
nManager.notify(1, notification);
}
}
答案 0 :(得分：0)
首先，我会尝试增加变量＆＃34; MIN_DISTANCE_CHANGE_FOR_UPDATES＆＃34;由于位置估计的近似性质，大于1的值（1表示1米，而不是10）（没有＆＃34;民用＆＃34;提供商可以给你最多1米的位置，甚至不是GPS）。
然后，我还会将用于添加Proximity Alert的代码从OnLocationChanged事件添加到onStart或仅触发一次的其他事件或方法，因为在您的情况下，每当您移动超过1米时OnLocationChanged就会触发在新创建的Proximity Alert中，您可以获得大量相同的Proximity Alerts。
我不知道这是否会解决您的问题，但您应该尝试一下，您的广播接收器代码和接近警报代码看起来不错......