如何在 Android 中以编程方式获取当前 GPS 位置? [英] How do I get the current GPS location programmatically in Android?

问题描述

我需要以编程方式使用 GPS 获取我的当前位置.我怎样才能实现它?

I need to get my current location using GPS programmatically. How can i achieve it?

推荐答案

我已经创建了一个带有分步说明的小应用程序来获取当前位置的 GPS 坐标.

I have created a small application with step by step description to get current location's GPS coordinates.

完整的示例源代码在获取当前位置坐标、城市名称 - 在 Android 中.

Complete example source code is in Get Current Location coordinates , City name - in Android.

看看它是如何工作的:

• 我们需要做的就是在清单文件中添加这个权限:

• All we need to do is add this permission in the manifest file:

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

然后像这样创建一个 LocationManager 实例:

And create a LocationManager instance like this:

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

检查 GPS 是否启用.

Check if GPS is enabled or not.

然后实现LocationListener并获取坐标:

And then implement LocationListener and get coordinates:

LocationListener locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 5000, 10, locationListener);

这是执行此操作的示例代码

Here is the sample code to do so

/*---------- Listener class to get coordinates ------------- */
private class MyLocationListener implements LocationListener {

    @Override
    public void onLocationChanged(Location loc) {
        editLocation.setText("");
        pb.setVisibility(View.INVISIBLE);
        Toast.makeText(
                getBaseContext(),
                "Location changed: Lat: " + loc.getLatitude() + " Lng: "
                    + loc.getLongitude(), Toast.LENGTH_SHORT).show();
        String longitude = "Longitude: " + loc.getLongitude();
        Log.v(TAG, longitude);
        String latitude = "Latitude: " + loc.getLatitude();
        Log.v(TAG, latitude);

        /*------- To get city name from coordinates -------- */
        String cityName = null;
        Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
        List<Address> addresses;
        try {
            addresses = gcd.getFromLocation(loc.getLatitude(),
                    loc.getLongitude(), 1);
            if (addresses.size() > 0) {
                System.out.println(addresses.get(0).getLocality());
                cityName = addresses.get(0).getLocality();
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        String s = longitude + "
" + latitude + "

My Current City is: "
            + cityName;
        editLocation.setText(s);
    }

    @Override
    public void onProviderDisabled(String provider) {}

    @Override
    public void onProviderEnabled(String provider) {}

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {}
}

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