Detecting GPS on/off switch in Android phones
I would like to detect when the user changes the G开发者_如何学JAVAPS settings on or off for an Android phone. Meaning when user switches GPS sattelite on/off or detection via access points etc.
As I have found out the best way to do this is to attach to the
<action android:name="android.location.PROVIDERS_CHANGED" />
intent.
For instance:
<receiver android:name=".gps.GpsLocationReceiver">
<intent-filter>
<action android:name="android.location.PROVIDERS_CHANGED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
And then in the code:
public class GpsLocationReceiver extends BroadcastReceiver implements LocationListener
...
@Override
public void onReceive(Context context, Intent intent)
{
if (intent.getAction().matches("android.location.PROVIDERS_CHANGED"))
{
// react on GPS provider change action
}
}
Here is a code sample for a BroadcastReceiver
detecting GPS location ON/OFF events:
private BroadcastReceiver locationSwitchStateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (LocationManager.PROVIDERS_CHANGED_ACTION.equals(intent.getAction())) {
LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
boolean isGpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
boolean isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (isGpsEnabled || isNetworkEnabled) {
//location is enabled
} else {
//location is disabled
}
}
}
};
Instead of changing your manifest file, you can register your BroadcastReceiver
dynamically:
IntentFilter filter = new IntentFilter(LocationManager.PROVIDERS_CHANGED_ACTION);
filter.addAction(Intent.ACTION_PROVIDER_CHANGED);
mActivity.registerReceiver(locationSwitchStateReceiver, filter);
Don't forget to unregister the receiver in your onPause()
method:
mActivity.unregisterReceiver(locationSwitchStateReceiver);
Try this,
try {
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
Log.i("About GPS", "GPS is Enabled in your devide");
} else {
//showAlert
}
Impement android.location.LocationListener, there you have two functions
public void onProviderEnabled(String provider);
public void onProviderDisabled(String provider);
Using this you can find out when the requested provider is turned on or off
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