什么是获取当前位置Android中的以下情形的最好办法,Android的最好的方式来获得当前位置
如果GPS不可用,从网络提供商处获得位置
如果GPS可用并且可以获得当前位置,则从GPS提供商获取位置
如果GPS可用但无法获得当前位置(即不断搜索位置),则从网络提供商处获得位置。
现在我可以从网络获取位置,如果GPS不可用,满足上述情况的最佳答案是高度赞赏。提前致谢。
什么是获取当前位置Android中的以下情形的最好办法,Android的最好的方式来获得当前位置
如果GPS不可用,从网络提供商处获得位置
如果GPS可用并且可以获得当前位置,则从GPS提供商获取位置
如果GPS可用但无法获得当前位置(即不断搜索位置),则从网络提供商处获得位置。
现在我可以从网络获取位置,如果GPS不可用,满足上述情况的最佳答案是高度赞赏。提前致谢。
If GPS is available and can get current location,
对于上面的问题,你可以尝试这样的..
使用这个你可以得到当前位置的经度和纬度,然后通过获得地图的价值。
public class MyLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
String Text = “My current location is: “ +
“Latitud = “ + loc.getLatitude() +
“Longitud = “ + loc.getLongitude();
Toast.makeText(getApplicationContext(),
Text,
Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderDisabled(String provider)
{
Toast.makeText(getApplicationContext(),
“Gps Disabled”,
Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderEnabled(String provider)
{
Toast.makeText(getApplicationContext(),
“Gps Enabled”,
Toast.LENGTH_SHORT).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
}
class member boolean mIsGpsFix
;
请求GPS位置更新和建立一个倒数计时器
mCountDown.start();
private CountDownTimer mCountDown = new CountDownTimer(time to wait for Gps fix, same as right)
{
@Override
public void onTick(long millisUntilFinished)
{
}
@Override
public void onFinish()
{
// No fix after the desire amount of time collapse
if (!mIsGpsFix)
// Register for Network
}
};
LocationManager manager;
TimerTask mTimertask;
GPSLocationListener mGPSLocationListener;
int i = 0; //Here i works as counter;
private static final int MAX_ATTEMPTS = 250;
public void getCurrentLocation() {
manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mGPSLocationListener = new GPSLocationListener();
manager.addGpsStatusListener(mGPSStatusListener);
mTimerTask = new LocTimerTask(LocationManager.GPS_PROVIDER);
if (manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
Log.v(TAG, "GPS ENABLED");
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000L,
50.0f, mGPSLocationListener);
} else {
turnGPSOn();
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000L,
50.0f, mGPSLocationListener);
}
if(manager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
manager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000L,
50.0f, mNetworkLocationListener);
}
if (manager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
Log.v(TAG, "GPS ENABLED");
manager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
1000L, 50.0f, mGPSLocationListener);
}
myLocTimer = new Timer("LocationRunner", true);
myLocTimer.schedule(mTimerTask, 0, 500);
}
GPSStatusListener
private GpsStatus.Listener mGPSStatusListener = new GpsStatus.Listener() {
@Override
public synchronized void onGpsStatusChanged(int event) {
switch (event) {
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
Log.v(TAG, "GPS SAtellitestatus");
GpsStatus status = manager.getGpsStatus(null);
mSattelites = 0;
Iterable<GpsSatellite> list = status.getSatellites();
for (GpsSatellite satellite : list) {
if (satellite.usedInFix()) {
mSattelites++;
}
}
break;
case GpsStatus.GPS_EVENT_FIRST_FIX:
/*
* Toast.makeText(getApplicationContext(), "Got First Fix",
* Toast.LENGTH_LONG).show();
*/
break;
case GpsStatus.GPS_EVENT_STARTED:
/*
* Toast.makeText(getApplicationContext(), "GPS Event Started",
* Toast.LENGTH_LONG).show();
*/
break;
case GpsStatus.GPS_EVENT_STOPPED:
/*
* Toast.makeText(getApplicationContext(), "GPS Event Stopped",
* Toast.LENGTH_LONG).show();
*/
break;
default:
break;
}
}
};
LocationListener的
public class GPSLocationListener implements LocationListener {
@Override
public void onLocationChanged(Location argLocation) {
location = argLocation;
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
的TimerTask类
class LocTimerTask extends TimerTask {
String provider;
public LocTimerTask(String provider) {
this.provider = provider;
}
final Handler mHandler = new Handler(Looper.getMainLooper());
Runnable r = new Runnable() {
@Override
public void run() {
i++;
Log.v(TAG, "Timer Task run" + i);
location = manager.getLastKnownLocation(provider);
if (location != null) {
Log.v(TAG, "in timer task run in if location not null");
isGPS = true;
onLocationReceived(location);
myLocTimer.cancel();
myLocTimer.purge();
mTimerTask.cancel();
return;
} else {
Log.v(TAG, "in timer task run in else location null");
isGPS = false;
if (location == null && i == MAX_ATTEMPTS) {
Log.v(TAG, "if 1 max attempts done");
turnGPSOff();
location = manager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
Log.v(TAG,
"if 1 max attempts done Location from network not null");
Log.v(TAG,
"if 1 max attempts done Location from network not null coordinates not null");
onLocationReceived(location);
myLocTimer.cancel();
myLocTimer.purge();
mTimerTask.cancel();
return;
}
} else {
return;
}
}
i = 0;
}
};
public void run() {
mHandler.post(r);
}
}
这里计时器已经计划在每500毫秒运行一次。意思是,每500毫秒计时器任务的run method
将被执行。在运行方法中,尝试从GPS提供商处获取具体编号的位置。的尝试(这里MAX_ATTEMPTS)说5或10.如果它获得指定的编号。的尝试然后使用该位置,否则如果计数器(这里我)的值已超过MAX_ATTEMPTS,则从网络提供商获取位置。在获取位置信息时,我已将该位置传递给回拨方法onLocationReceived(Location mLoc)
,您可以在该位置进一步处理位置数据。这里是你将如何使用回调方法:
监听
public interface OnLocationReceivedListener {
public void onLocationReceived(Location mLoc); //callback method which will be defined in your class.
}
你的类应该实现上述定义的监听器。在你的班级:
@Override
public void onLocationReceived(Location mLoc) {
//Do your stuff
}
希望它有帮助。如果有人有更好的方法,请让我知道。
看看这个库:https://code.google.com/p/little-fluffy-location-library/ – dannyroa 2013-03-27 07:08:24
您是否检查旧帖子 1. http://stackoverflow.com/questions/1513485/how-do-i-get-the-current-gps-location-programmatically-in-android 2. http://stackoverflow.com/questions/3145089/what-is-the-simplest-and-most-用户当前所在位置的健壮路径/ 3145655#3145655 – surhidamatya 2013-03-27 07:29:14
最简单的方法是使用像这样的更高级别的库:https://github.com/delight-im/Android -SimpleLocation – caw 2015-03-04 22:55:01