GPS的Android - 获得定位只有一次(GPS Android - get position

是否有访问GPS一度而不是一个弯针不停地检查位置更新的方法吗？

在我的方案中所有我感兴趣的是找到当前坐标，而不是与GPS卫星连续的连接。 有没有人有任何想法，这可怎么办呢？ 提前致谢。

Answer 1:

首先检查是否最后一个已知位置是最近的事。 如果不是这样，我相信你一定要建立onLocationChanged监听器，但一旦你得到你的第一个有效的位置，您可以随时停止更新流。

加成

public class Example extends Activity implements LocationListener {
    LocationManager mLocationManager;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

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

        Location location = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if(location != null && location.getTime() > Calendar.getInstance().getTimeInMillis() - 2 * 60 * 1000) {
            // Do something with the recent location fix
            //  otherwise wait for the update below
        }
        else {
            mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
        }
    }

    public void onLocationChanged(Location location) {
        if (location != null) {
            Log.v("Location Changed", location.getLatitude() + " and " + location.getLongitude());
            mLocationManager.removeUpdates(this);
        }
    }

    // Required functions    
    public void onProviderDisabled(String arg0) {}
    public void onProviderEnabled(String arg0) {}
    public void onStatusChanged(String arg0, int arg1, Bundle arg2) {}
}

Answer 2:

不要使用getLastKnownLocation，因为这可能会返回null或旧数据。

此代码只有一次按下按钮，而不是每一次获取的位置 。 人们用离开位置监听器在每种情况下聆听并杀死电池寿命所以使用的代码片段我已经发布了通过做大量的研究：

// get the text view and buttons from the xml layout
Button button = (Button) findViewById(R.id.btnGetLocation);
final TextView latitude = (TextView) findViewById(R.id.textview4);
final TextView longitude = (TextView) findViewById(R.id.textview5);
final LocationListener locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            mlocation = location;
            Log.d("Location Changes", location.toString());
            latitude.setText(String.valueOf(location.getLatitude()));
            longitude.setText(String.valueOf(location.getLongitude()));
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
            Log.d("Status Changed", String.valueOf(status));
        }

        @Override
        public void onProviderEnabled(String provider) {
            Log.d("Provider Enabled", provider);
        }

        @Override
        public void onProviderDisabled(String provider) {
            Log.d("Provider Disabled", provider);
        }
    };

    // Now first make a criteria with your requirements
    // this is done to save the battery life of the device
    // there are various other other criteria you can search for..
    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_COARSE);
    criteria.setPowerRequirement(Criteria.POWER_LOW);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);
    criteria.setSpeedRequired(false);
    criteria.setCostAllowed(true);
    criteria.setHorizontalAccuracy(Criteria.ACCURACY_HIGH);
    criteria.setVerticalAccuracy(Criteria.ACCURACY_HIGH);

    // Now create a location manager
    final LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

   // This is the Best And IMPORTANT part
    final Looper looper = null;

   // Now whenever the button is clicked fetch the location one time
   button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            locationManager.requestSingleUpdate(criteria, locationListener, looper);
       }
   });

文章来源: GPS Android - get positioning only once