Question

我已经使用了这段代码并且正在运作：

 if(MyLocationListener.latitude>0){
                MyToast.makeText(Weather.this,Double.toString(MyLocationListener.latitude));
                MyToast.makeText(Weather.this, Double.toString(MyLocationListener.longitude));
                lat=MyLocationListener.latitude;
                lon=MyLocationListener.longitude;
                Log.v("this","lat "+Double.toString(lat) );
                Log.v("this","lon "+Double.toString(lon) );
             }

我需要在连接gps时调用一个类。上面的代码在一个按钮中，因此用户每次都应该点击按钮以了解gps是否已连接!!

如何在连接gps时调用类？

谢谢

Answer 1

此代码可能会对您有所帮助

将ACCESS_FINE_LOCATION权限添加到您的清单获取系统LocationManager的实例创建一个对GPS_EVENT_SATELLITE_STATUS作出反应的GpsStatus.Listener 使用带有addGpsStatusListener

的LocationManager注册侦听器

GpsStatus.Listener listener = new GpsStatus.Listener（） { void onGpsStatusChanged（int事件） {

        if (event == GPS_EVENT_SATELLITE_STATUS)    
        {

            GpsStatus status = mLocManager.getGpsStatus(null);
            Iterable<GpsSatellite> sats = status.getSatellites();
            // Check number of satellites in list to determine fix state
        }
    }
}

Answer 2

我认为这段代码可以帮助你解决问题

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

以上是你必须在manifest.xml中添加的内容

以下是代码

public class ExampleApp extends Activity {
/** Called when the activity is first created. */
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

    if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
        Toast.makeText(this, "GPS is Enabled in your devide", Toast.LENGTH_SHORT).show();
    }else{
        showGPSDisabledAlertToUser();
    }
}

private void showGPSDisabledAlertToUser(){
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
    alertDialogBuilder.setMessage("GPS is disabled in your device. Would you like to enable it?")
    .setCancelable(false)
    .setPositiveButton("Goto Settings Page To Enable GPS",
            new DialogInterface.OnClickListener(){
        public void onClick(DialogInterface dialog, int id){
            Intent callGPSSettingIntent = new Intent(
                    android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(callGPSSettingIntent);
        }
    });
    alertDialogBuilder.setNegativeButton("Cancel",
            new DialogInterface.OnClickListener(){
        public void onClick(DialogInterface dialog, int id){
            dialog.cancel();
        }
    });
    AlertDialog alert = alertDialogBuilder.create();
    alert.show();
}

}

Answer 3

当gps连接时，你必须使用BroadCastRecievers来通知..

Gps status enabled/disabled broadcast receiver

这肯定会帮助您如何使用广播进行gps状态更改。

Answer 4

在Manifest

中添加权限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

在您的活动中尝试此操作：

  LocationManager manager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );

        if ( !manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) {
            buildAlertMessageNoGps();
        }

      private void buildAlertMessageNoGps() {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("Your GPS seems to be disabled, do you want to enable it?")
               .setCancelable(false)
               .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                   public void onClick(@SuppressWarnings("unused") final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
                       startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                   }
               })
               .setNegativeButton("No", new DialogInterface.OnClickListener() {
                   public void onClick(final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
                        dialog.cancel();
                   }
               });
        final AlertDialog alert = builder.create();
        alert.show();
    }

android-如何找出gps何时连接

4 个答案: