我想在我的應用程序中訪問gps服務。因此,我在按鈕的onClick()
方法內使用了Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
。調用Intent後,我啓動服務以偵聽位置更新。在onResume方法中,我檢查gps服務。如果它被禁用,我停止服務。但是,當顯示位置設置並且在用戶打開gps之前服務最終停止時,會調用onResume方法。Android onResume方法在活動不可見時調用
代碼:
Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
gps_intent=new Intent(AddOffers.this, StatsGpsService.class);
gps_intent.putExtra("offr_act_ind",true);
startService(gps_intent);
@Override
protected void onResume() {
super.onResume();
LocationManager locationManager=(LocationManager) getSystemService(Context.LOCATION_SERVICE);
boolean isproviderenabled=locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if(isproviderenabled==false){
if(gps_intent!=null){
Log.e("g","g");
stopService(gps_intent);
}}
StatsGpsService.java:
public class StatsGpsService extends Service {
LocationListener locationListener;
LocationManager locationManager;
boolean flag1;
public StatsGpsService() {
super();
}
@Override
public void onCreate() {
super.onCreate();
Log.e("Service","Created");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
handleLocation(intent);
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy() {
super.onDestroy();
Log.e("Service","Destroyed");
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
public void handleLocation(Intent intent){
if(intent!= null) {
flag1 = intent.getBooleanExtra("offr_act_ind", false);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
if (flag1 == true) {
Intent intent = new Intent("loc_updts");
intent.putExtra("stat_lat", location.getLatitude());
intent.putExtra("stat_longt", location.getLongitude());
sendBroadcast(intent);
}
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
Log.e("Provider","Disabled");
}
};
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 10, locationListener);
}
}
}
在哪個回調的活動中,你是否啓動了gps s ervice? – Yashasvi
我在按鈕的onClick方法中啓動它。 – jobin
我的問題類似於http://stackoverflow.com/questions/25616956/which-activity-life-cycle-gets-called-when-app-redirect-to-settings – jobin