Question

我正在使用Android Studio 3.0.1并尝试使用API 19（KitKat）获取GPS位置，它是一个扩展FragmentActivity的活动（AppCompatActivity）。我已经启动了GPS，我正在使用真正的设备＆＃34; Alcatel One Touch＆＃34;我确实更新了它的服务（谷歌服务，地图等），电池100％我有我的权限设置：<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>

这是我的代码：

LocationManager locationManager;
LocationListener listener;

public void start()
{
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    listener = new LocationListener()
    {
        @Override
        public void onLocationChanged(Location location)
        {
            String ss = String.valueOf(location.getLatitude()) + " || " + String.valueOf(location.getLongitude() + " : " + location.getProvider());
            Log.i("Location", ss);
            Toast.makeText(MainActivity.this, ss, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onStatusChanged(String s, int i, Bundle bundle)
        {
            Toast.makeText(MainActivity.this, "changed", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onProviderEnabled(String s)
        {
            Toast.makeText(MainActivity.this, "enabled", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onProviderDisabled(String s)
        {
            Toast.makeText(MainActivity.this, "disabled", Toast.LENGTH_SHORT).show();
        }
    };


    if(Build.VERSION.SDK_INT < 23 )
    {
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); // my case
    }
    else
    {
        int Check_Permission = ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION);
        int Permission_Granted = PackageManager.PERMISSION_GRANTED;
        if (Check_Permission != Permission_Granted)
        {
            ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},10);
        }
        else
        {
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);
        }
    }       
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
{
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    Toast.makeText(this, "Granted", Toast.LENGTH_SHORT).show();

    if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
    {
        if(ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
        {
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);
        }
    }
}

永远不会调用

onLocationChanged，除非我改变

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);

到

locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, listener);

它立即起作用，但为什么它没有使用GPS_PROVIDER？在GPS_PROVIDER上我等了30分钟以防万一GPS需要太长时间来获取位置，但它没有。

Answer 1

好吧，事实证明，即使我移动我必须走得有点远，让gps获得定位和更好的信号，我使用GPS Test来跟踪信号功率，然后我重启了我的按照应用程序的说明打电话。

GPS位置仅适用于NETWORK_PROVIDER？

1 个答案: