我设计了我的服务，因为它会在用户去某个位置时发出警报。但是当它到达某个发出警报的地方时它会崩溃。
public class CheckDestinationService extends Service {
Calendar calender;
double late,longe;
int dis;
String loc;
private LocationManager mLocationManager = null;
private static final int LOCATION_INTERVAL = 0;
private static final float LOCATION_DISTANCE = 0;
private class LocationListener implements android.location.LocationListener {
Location mLastLocation;
public LocationListener(String provider) {
mLastLocation = new Location(provider);
}
public void onLocationChanged(Location location) {
mLastLocation.set(location);
final double currlat;
final double currlong;
float[] DistanceArray = new float[1];
currlat = location.getLatitude();
currlong = location.getLongitude();
android.location.Location.distanceBetween(currlat,currlong,late,longe,DistanceArray);
float Distance = DistanceArray[0];
//Toast.makeText(getApplicationContext(), "asdf "+String.valueOf(Distance), Toast.LENGTH_SHORT).show();
Log.d("asdfasdas", String.valueOf(currlat)+","+String.valueOf(currlong)+" "+String.valueOf(Distance));
if (Distance<=dis && Distance!=0 && dis!=0)
{
dis = 0;
Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Toast.makeText(getApplicationContext(), "Reached "+String.valueOf(Distance), Toast.LENGTH_SHORT).show();
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, calender.getTimeInMillis(),pendingIntent);
//stopSelf();
}
/*final Handler handler = new Handler();
Runnable r = new Runnable() {
public void run() {
// TODO Auto-generated method stub
Intent intent = null;
intent.putExtra("lat", currlat);
intent.putExtra("long", currlong);
intent.putExtra("dis", dis);
intent.putExtra("loc", loc);
Toast.makeText(getApplicationContext(), "Sending", Toast.LENGTH_SHORT).show();
sendBroadcast(intent);
handler.postDelayed(this, 1000);
}
};
handler.postDelayed(r, 1000);*/
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
LocationListener[] mLocationListeners = new LocationListener[] {
new LocationListener(LocationManager.GPS_PROVIDER),
new LocationListener(LocationManager.NETWORK_PROVIDER)
};
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
late = intent.getDoubleExtra("lat", 0);
longe = intent.getDoubleExtra("long", 0);
dis = intent.getIntExtra("dis", 0);
loc = intent.getStringExtra("loc");
Toast.makeText(getApplicationContext(), "Destination Set to: "+loc+
" and Minimum Distance: "+
String.valueOf(dis) , Toast.LENGTH_SHORT).show();
return START_STICKY;
}
@Override
public void onCreate() {
initializeLocationManager();
try {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[1]);
} catch (java.lang.SecurityException ex) {
} catch (IllegalArgumentException ex) {
}
try {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[0]);
} catch (java.lang.SecurityException ex) {
} catch (IllegalArgumentException ex) {
}
}
@Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(getApplicationContext(), "Service Destroyed", Toast.LENGTH_SHORT).show();
if (mLocationManager != null) {
for (int i = 0; i < mLocationListeners.length; i++) {
try {
mLocationManager.removeUpdates(mLocationListeners[i]);
} catch (Exception ex) {
}
}
}
}
private void initializeLocationManager() {
if (mLocationManager == null) {
mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
}
}
}
我的 AlarmReceiver 类是
public class AlarmReceiver extends Activity {
private MediaPlayer mMediaPlayer;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.alarmreceiver);
Button stopAlarm = (Button) findViewById(R.id.stopAlarm);
stopAlarm.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View arg0, MotionEvent arg1) {
stopService(new Intent(AlarmReceiver.this, CheckDestinationService.class));
mMediaPlayer.stop();
finish();
return false;
}
});
playSound(this, getAlarmUri());
}
private void playSound(Context context, Uri alert) {
mMediaPlayer = new MediaPlayer();
try {
mMediaPlayer.setDataSource(context, alert);
final AudioManager audioManager = (AudioManager) context
.getSystemService(Context.AUDIO_SERVICE);
if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
mMediaPlayer.prepare();
mMediaPlayer.start();
}
} catch (IOException e) {
System.out.println("OOPS");
}
}
//Get an alarm sound. Try for an alarm. If none set, try notification,
//Otherwise, ringtone.
private Uri getAlarmUri() {
Uri alert = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_ALARM);
if (alert == null) {
alert = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
if (alert == null) {
alert = RingtoneManager
.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
}
}
return alert;
}
@Override
public void onBackPressed() {
//MainActivity.iMinDistance = 0;
stopService(new Intent(AlarmReceiver.this, CheckDestinationService.class));
mMediaPlayer.stop();
finish();
}
}
我从其他活动中测试了 AlarmReceiver 类，它工作正常，但不能从服务中工作。请帮忙！！