Question

在我的应用程序中，我在onStart（）方法中调用“requestLocationUpdates”，并且我正确地接收更新。

当我通过调用“removeUpdate（locationlistener）”关闭GPS时，我停止按预期接收更新。

问题是，当我想通过再次调用“requestLocationUpdates”方法重启GPS系统时，它无法正常工作！它永远不会进入“onLocationChanged”或“onStatusChanged”方法

我的gpsLocationListener代码;

public final LocationListener gpsLocationListener = new LocationListener() {
    public void onStatusChanged(String provider, int status, Bundle extras) {
        switch (status) {
        case LocationProvider.AVAILABLE:
            Logging.TraceMessage("GPS available again", Logging.INFORMATION, Logging.MAINACTIVITY);
            break;
        case LocationProvider.OUT_OF_SERVICE:
            Logging.TraceMessage("GPS out of service", Logging.INFORMATION, Logging.MAINACTIVITY);
            deviceSettings.gpsStatus = "2";
            break;
        case LocationProvider.TEMPORARILY_UNAVAILABLE:
            Logging.TraceMessage("GPS temporarily unavailable", Logging.INFORMATION, Logging.MAINACTIVITY);
            break;
        }
    }

    public void onProviderEnabled(String provider) {
        Logging.TraceMessage("GPS Provider Enabled", Logging.INFORMATION, Logging.MAINACTIVITY);
    }

    public void onProviderDisabled(String provider) {
        Logging.TraceMessage("GPS Provider Disabled", Logging.INFORMATION, Logging.MAINACTIVITY);
        deviceSettings.gpsStatus = "2";
    }

    public void onLocationChanged(Location location) {
        if(location == null) return;

        tempLoc.setItem(location.getLongitude(), location.getLatitude(), deviceSettings.getCurrentTime(), deviceSettings.satelliteCount, location.getSpeed());
            if (!SafeLocation.IsSafe(tempLoc) ){
            return;
        }

        deviceSettings.currX = tempLoc._x;
        deviceSettings.currY = tempLoc._y;
        deviceSettings.currSpeed = tempLoc._speed;
        deviceSettings.currValid = true;

    }
};

我的删除代码;

if( ! deviceSettings.isprogramModeActive ){

                         if(gpsLocationListener != null){
                             try {
                                 locationManager.removeUpdates(gpsLocationListener);
                             } catch (Exception e) {
                             }                           
                         }
                         mylocatewait(30000);//30 saniye bekle
                         continue;
                    }

我的请求再次代码：

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, ServerSettings.getGpsPer()*1000, 0, gpsLocationListener);

Answer 1

我解决了这个问题！

我从线程中调用一个处理程序。

locateHandler.sendEmptyMessage(1);

我从处理程序调用以下代码，而不是在线程中。

 Handler locateHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(msg.what == 0)
                locationManager.removeUpdates(gpsLocationListener);
            else if(msg.what == 1)
                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, ServerSettings.getGpsPer()*1000, 0, gpsLocationListener);
        }
    };

调用“removeUpdates”后GPS系统不会重启

1 个答案: