安卓全局定位系统。位置监听器不想获取修复 :(

Question

下面是一段代码，用于监听 GPS 更新并向主要 Activity 发送通知

但是它似乎并没有起作用:)

没有错误，只是没有调用 onLocationChanged!

有趣的是:当我运行其他一些应用程序来获取 GPS 定位，然后启动我的应用程序时 => onLocationChanged 被调用，只有精度下降，最终定位丢失。

我还尝试将 GPS 监听器添加到此代码中 => 它有效，每秒都会报告视野中的卫星，但从未获得唯一的修复。

这到底是怎么回事？ :)

公共(public)类 PhoneGPSpos{

private Handler myHandler = null;
private LocationManager lm;
private LocationListener locationListener;
private Location currentBest;
Context m_context;

public PhoneGPSpos(Context 上下文, Handler 处理程序) {

    myHandler = handler;
    m_context = context;


    lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

 //  Bundle bundle = new Bundle();
 //  boolean xtraInjection=lm.sendExtraCommand(LocationManager.GPS_PROVIDER,"force_xtra_injection",bundle);
 //  boolean timeInjection=lm.sendExtraCommand(LocationManager.GPS_PROVIDER,"force_time_injection",bundle);

   currentBest = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);

    locationListener = new LocationListener() 
   { 

           public void onLocationChanged(Location location)
           { 
                Log.w("Compass", "Loc");

            if (location != null)
            {
                currentBest = location;

                Message msg = new Message();

                msg.arg1 = 5;
                myHandler.sendMessage(msg);

            }
           } 

           public void onStatusChanged(String provider, int status, Bundle 
           extras) {
            Log.d("Compass", "Stat");
           } 

           public void onProviderEnabled(String provider) {
            Log.d("Compass", "Prov e");
           } 

           public void onProviderDisabled(String provider) {
            Log.d("Compass", "Prov d");
        } 
   }; 
}

public void requestGPS()
{
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
    Log.d("Compass", "gps requested");
}

public void stopGPS()
{
    Log.d("Compass", "gps stopped");
    lm.removeUpdates(locationListener);
}

public synchronized  Location getBest()
{
    return  currentBest;
}

Answer 1

好吧，弄清楚这是一个其他人也看到的问题:显然(至少在某些手机上)如果相机处于 Activity 状态，GPS 监听器的效果会更差。

Problem with getting GPS data when using CameraPreview

Android: Losing GPS signal strength on some phones when I start up the Camera and SurfaceView

Camera Preview and GPS reading in Android

为那个 http://code.google.com/p/android/issues/detail?id=20098 创建了 Andorid 问题

如果有人有解决方案请分享