第一步,您应该创建一个 Android 插件,该插件将为您提供用于接收位置数据的 API。
创建插件非常简单,在此处进行了说明:
插件开发指南和在 Android 上开发插件。您还可以在此处查看创建 Cordova 插件的示例。
接下来,创建一个位置监视器类。您可以将其设为单例并从您的主要活动中对其进行初始化。
这是一个简单但有效的代码,我从多个来源和许多测试中编译来满足我的需求。主要代码取自这里,尽管我尽可能地对其进行了简化。
public class LocationMonitor
{
private LocationListener locationListener = null;
private LocationManager locationManager = null;
private Location location = null;
public LocationMonitor()
{
}
public void startGPSActivity(Context context)
{
LocationLooper looper = new LocationLooper();
looper.start();
while (!looper.isReady())
{
}
looper.handler.post(new LocationBootstrapper(context));
}
public void stopGPSActivity()
{
locationManager.removeUpdates(locationListener);
}
public Location getLocation()
{
return location;
}
private class LocationLooper extends Thread
{
private Handler handler;
private LocationLooper()
{
}
public void run()
{
Looper.prepare();
this.handler = new Handler();
Looper.loop();
}
public boolean isReady()
{
return this.handler != null;
}
}
private class LocationBootstrapper implements Runnable
{
private Context context;
private LocationBootstrapper(Context context)
{
this.context = context;
}
public void run()
{
locationListener = new LocationListenerImpl();
locationManager = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 1, locationListener);
}
}
private class LocationListenerImpl implements LocationListener
{
private LocationListenerImpl()
{
}
@Override
public void onLocationChanged(Location location)
{
LocationMonitor.this.location = location;
Log.i("LocationMonitor", "New location: lat= " + location.getLatitude() + " lng=" + location.getLongitude() + " acc=" + location.getAccuracy());
}
@Override
public void onProviderDisabled(String provider)
{
}
@Override
public void onProviderEnabled(String provider)
{
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
}
现在从您的插件访问 LocationMonitor 类,您就有了所需的解决方案 - 页面更改不会重新初始化您的 GPS,并且您的 PhoneGap 应用程序可以使用位置数据。
干杯