Android GPS状态改变与监听

/**
     * 获取ＧＰＳ当前状态
     * @param context
     * @return
     */
    private boolean getGPSState(Context context){
        LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        boolean on = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
        return on;
    }

    /**
     * 注册监听广播
     * @param context
     * @throws Exception
     */
    public void ready(Context context)throws Exception{
        IntentFilter filter = new IntentFilter();
        filter.addAction(LocationManager.PROVIDERS_CHANGED_ACTION);
        context.registerReceiver(new GpsStatusReceiver(), filter);
    }

    boolean currentGPSState = false;

    /**
     * 监听GPS 状态变化广播
     */
    private class GpsStatusReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(LocationManager.PROVIDERS_CHANGED_ACTION)){
                currentGPSState = getGPSState(context);
            }
        }
    }

    /**
     * 改变GPS状态
     * @param context
     * @throws Exception
     */
    public void changeGPSState(Context context)throws Exception {
        boolean before = getGPSState(context);
        ContentResolver resolver = context.getContentResolver();
        if (before){
            Settings.Secure.putInt(resolver,Settings.Secure.LOCATION_MODE,Settings.Secure.LOCATION_MODE_OFF);
        }else {
            Settings.Secure.putInt(resolver,Settings.Secure.LOCATION_MODE,Settings.Secure.LOCATION_MODE_HIGH_ACCURACY);
        }
        currentGPSState = getGPSState(context);
    }