我对Android很新,这是我在这里的第一篇文章,所以请善待! : - )
我正在尝试创建一个在后台运行的服务,每x分钟更新一次位置。要每隔x分钟运行一次,我正在使用AlarmManager,如下所述:Alarm Manager Example
这就是我所拥有的:
package com.example.service1;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.PowerManager;
import android.util.Log;
public class Scheduler extends BroadcastReceiver{
LocationManager locationManager;
LocationListener locationListener;
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "");
wl.acquire();
//Code which is executed every X seconds/minutes
getLocation(context);
//End of Code
wl.release();
}
public void setScheduler(Context context) {
AlarmManager am = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, Scheduler.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 20, pi);
}
//Method to get the Location
public void getLocation(Context context) {
Log.e("null","getLocation");
locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
Log.e(null, "location change");
makeUseOfLocation(location);
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
// TODO Auto-generated method stub
}
};
}
//Method to work with the location Data; Instance of Point is created
public void makeUseOfLocation(Location location) {
Log.e(null,"makeuse");
Log.e(null,location.getLatitude() + "");
}
}
getLocation()
每20秒调用一次,但它永远不会运行onLocationChanged()
(我使用Eclipse中的EmulatorControl来更改位置)。
在使用ScheduledExecutorService
代替AlarmManager
之前,我遇到了同样的问题。
任何人都可以帮助我吗?
答案 0 :(得分:0)
试试这个..
protected void updateNotification() {
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new MyLocationlistener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, normallocationwait, 0.250f, locationListener);
location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}
private class MyLocationlistener implements LocationListener {
public void onLocationChanged(Location location){
if(location!=null){
if(location.hasAccuracy()){
dumpLocation(location);
}else{
dumpLocation(location);
}
}
}
public void onProviderDisabled(String provider){
Log.v("Loc Update","\nProvider disabled: " + provider);
}
public void onProviderEnabled(String provider){
Log.v("Loc Update","\nProvider enabled: " + provider);
}
public void onStatusChanged(String provider, int status, Bundle extras){
Log.v("Loc Update","\nProvider status changed: " + provider + ", status="
+ status + ", extras=" + extras);
}
答案 1 :(得分:0)
查看你的代码我从来没有看到调用locationManager.requestLocationUpdates()并将你的监听器作为参数。
这意味着您的侦听器从未向位置管理器注册,因此不会被调用。
您可能只想注册一个侦听器,而不是每次都注册一个新的侦听器。