问题
I'm trying to set up the most basic proximity alert, but nothing seems to happen. I'm fairly new to Android programming, so please let me know what I'm doing wrong or what am I missing. I got inspired from some source codes out here and this one. Here's my code:
package com.example.proximityalert;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
public class MainActivity extends Activity {
private static final String PROX_ALERT_INTENT = "com.example.proximityalert";
private IntentReceiver locationReminderReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent(PROX_ALERT_INTENT);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationManager.addProximityAlert(55.586301,13.045417, 200, -1, pendingIntent);
this.locationReminderReceiver = new IntentReceiver();
final IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);
this.registerReceiver(this.locationReminderReceiver, filter);
}
}
and the Receiver
package com.example.proximityalert;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.location.LocationManager;
import android.util.Log;
import android.widget.Toast;
public class IntentReceiver extends BroadcastReceiver{
// @SuppressWarnings("deprecation")
@Override
public void onReceive(Context context, Intent intent) {
String key = LocationManager.KEY_PROXIMITY_ENTERING;
Boolean entering = intent.getBooleanExtra(key, false);
if (entering) {
Toast.makeText(context, "LocationReminderReceiver entering", Toast.LENGTH_SHORT).show();
Log.i("LocationReminderReceiver", "entering");
} else {
Toast.makeText(context, "LocationReminderReceiver exiting", Toast.LENGTH_SHORT).show();
Log.i("LocationReminderReceiver", "exiting");
}
}
}
回答1:
This is the service that i use to get proximity alerts, your welcome to use it, it doesnt need the reciever in the manifest, just the service
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.graphics.Color;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class ProximityService extends Service{
String proximitysd = "com.apps.ProximityService";
int n = 0;
private BroadcastReceiver mybroadcast;
private LocationManager locationManager;
MyLocationListener locationListenerp;
public ProximityService() {
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
mybroadcast = new ProximityIntentReceiver();
locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
double lat;
double lng;
float radius = 50f;
long expiration = -1;
MyDBAdapter db = new MyDBAdapter(this);
Cursor cursor;
db.read();
cursor = db.getAllEntries();
boolean go = cursor.moveToFirst();
while(cursor.isAfterLast() != true){
lat = cursor.getInt(MyDBAdapter.LATITUDE_COLUMN)/1E6;
lng = cursor.getInt(MyDBAdapter.LONGITUDE_COLUMN)/1E6;
String what = cursor.getString(MyDBAdapter.ICON_COLUMN);
String how = cursor.getString(MyDBAdapter.FISH_COLUMN);
String proximitys = "com.apps.ProximityService" + n;
IntentFilter filter = new IntentFilter(proximitys);
registerReceiver(mybroadcast, filter );
Intent intent = new Intent(proximitys);
intent.putExtra("alert", what);
intent.putExtra("type", how);
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, n, intent, PendingIntent.FLAG_CANCEL_CURRENT);
locationManager.addProximityAlert(lat, lng, radius, expiration, proximityIntent);
//sendBroadcast(new Intent(intent));
n++;
cursor.moveToNext();
}
db.close();
cursor.close();
}
@Override
public void onDestroy() {
Toast.makeText(this, "Proximity Service Stopped", Toast.LENGTH_LONG).show();
try{
unregisterReceiver(mybroadcast);
}catch(IllegalArgumentException e){
Log.d("reciever",e.toString());
}
}
@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "Proximity Service Started", Toast.LENGTH_LONG).show();
//IntentFilter filter = new IntentFilter(proximitys);
//registerReceiver(mybroadcast,filter);
}
public class ProximityIntentReceiver extends BroadcastReceiver{
private static final int NOTIFICATION_ID = 1000;
@Override
public void onReceive(Context arg0, Intent arg1) {
String key = LocationManager.KEY_PROXIMITY_ENTERING;
Boolean entering = arg1.getBooleanExtra(key, false);
String here = arg1.getExtras().getString("alert");
String happy = arg1.getExtras().getString("type");
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
PendingIntent pendingIntent = PendingIntent.getActivity(arg0, 0, arg1, 0);
Notification notification = createNotification();
notification.setLatestEventInfo(arg0,
"Entering Proximity!", "You are approaching a " + here + " marker.", pendingIntent);
notificationManager.notify(NOTIFICATION_ID, notification);
}
private Notification createNotification() {
Notification notification = new Notification();
notification.icon = R.drawable.icon;
notification.when = System.currentTimeMillis();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.defaults |= Notification.DEFAULT_LIGHTS;
notification.ledARGB = Color.WHITE;
notification.ledOnMS = 1500;
notification.ledOffMS = 1500;
return notification;
}
//make actions
}
public class MyLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
Toast.makeText(getApplicationContext(), "I was here", Toast.LENGTH_LONG).show();
}
public void onProviderDisabled(String s) {
}
public void onProviderEnabled(String s) {
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
}
}
you would have to replace the database query and some of the code to fit your app, this is for multiple proximity alerts thats why there is the increment of n.
来源：https://stackoverflow.com/questions/16428737/android-gps-proximity-alert-not-working