How to Enable/disable GPS in Android ?

Method-1

Enable GPS

Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");

intent.putExtra("enabled", true);

sendBroadcast(intent);

Disable GPS

Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");

intent.putExtra("enabled", false);

sendBroadcast(intent);

Method-2

    // If GPS is OFF

    private void turnGPSOn(){

        String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);

        if(!provider.contains("gps")){

            final Intent intent = new Intent();

            intent.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");

            intent.addCategory(Intent.CATEGORY_ALTERNATIVE);

            intent.setData(Uri.parse("3"));

            sendBroadcast(intent);

        }

    }

    // If GPS is ON

    private void turnGPSOff(){

        String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);

        if(provider.contains("gps")){

            final Intent intent = new Intent();

            intent.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");

            intent.addCategory(Intent.CATEGORY_ALTERNATIVE);

            intent.setData(Uri.parse("3"));

            sendBroadcast(intent);

        }

    }

List of devices on which GPS successfully turned on and off by program

Model : Nexus S , OS Version : 2.3.3

Model : HTC Sensation, OS Version : 2.3.3

Model : LG Optimus one, OS Version : 2.3.3

Model : HTC Legend ,OS Version : 2.2

Model : Samsung Galaxy Ace,OS Version : 2.3.3

List of devices on which we are getting problem while GPS turned on and off by program

Model : Nexus One , OS Version : 2.3.6

Model : Nexus S , OS Version : 2.3.6

Model : Samsung Galaxy Mini, OS Version : 2.3.4

Model : Sony Ericsson EXPERIA NEO V, OS Version : 2.3.4