Android(安卓)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);    }
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