Or *_*zaz 10 android locationmanager android-mapview
我正在使用Google API和MapActivity,MapView等.
当我需要获取当前位置时,我会在第一时间使用此代码:
myLocationManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
// Sets the criteria for a fine and low power provider
Criteria crit = new Criteria();
crit.setAccuracy(Criteria.ACCURACY_FINE);
crit.setPowerRequirement(Criteria.POWER_LOW);
// Gets the best matched provider, and only if it's on
String provider = myLocationManager.getBestProvider(crit, true);
// If there are no location providers available
if (provider == null){
OnClickListener listener = new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Closes the activity
finish();
}
};
Utils.getInstance().showAlertDialog(this, R.string.warning_dialog_title,
R.string.no_location_providers_error_message,
android.R.drawable.ic_dialog_alert, false, listener);
}
// Location services is enabled
else{
myLocationListener = new MyLocationListener();
myLocationManager.requestLocationUpdates(
provider,
0,
0,
myLocationListener);
// TODO - put a marker in my location
GeoPoint currentGeoPoint = MapUtils.getInstance().
getCurrentLocation(myLocationManager, provider);
// Center to the current location
centerLocation(currentGeoPoint, MAX_ZOOM);
}
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我还有一个"回到当前位置按钮" - 当用户移动地图并希望快速返回其当前位置时.
我的问题是,每次我想获取位置信息时,我应该使用该getBestProvider()方法吗?
我可以保存最后一个选择的提供者,但条件可能每秒都会改变:
什么是正确的方法?
就像评论中所说的那样,这就是答案: http://developer.android.com/guide/topics/location/strategies.html#BestEstimate
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