Question

在我的Android应用中，我需要在点击按钮时gt用户位置。但是，我不需要接收有关其位置的持续更新。

我在stackoverflow上搜索了几个问题，但答案是2 - 3年，所以我想知道，就像现在的Android SDK一样，最好的方法是什么。

此外，如果可能的话，我希望不会在该位置获得null。

提前致谢。

Answer 1

我知道这个问题已经过时了，但万一有人还需要知道答案。您可以使用setNumUpdates方法并传递值1。例如：

mLocationRequest = new LocationRequest();
mLocationRequest.setNumUpdates(1);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

默认情况下，位置会不断更新，直到明确删除请求为止，但您可以选择请求一定数量的更新。例如，如果您的应用程序只需要一个新的位置，那么在将请求传递给位置客户端之前，请使用值1调用此方法。

https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest.html#setNumUpdates(int)

Answer 2

Android在上次I / O峰会上推出融合位置，融合位置为您提供更可靠，更准确的位置与最佳供应商。

import android.location.Location;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {


    TextView txtOutputLat, txtOutputLon;
    Location mLastLocation;
    private GoogleApiClient mGoogleApiClient;
    private LocationRequest mLocationRequest;
    String lat, lon;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        GoogleApiClient();
    }


    @Override
    public void onConnected(Bundle bundle) {


        mLocationRequest = LocationRequest.create();
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        mLocationRequest.setInterval(100); // Update location every second

        //use if you want location update
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,              mLocationRequest, this);

        // here you get current location
        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
                                                                          mGoogleApiClient);
        if (mLastLocation != null) {
            lat = String.valueOf(mLastLocation.getLatitude());
            lon = String.valueOf(mLastLocation.getLongitude());

        }

    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onLocationChanged(Location location) {
        lat = String.valueOf(location.getLatitude());
        lon = String.valueOf(location.getLongitude());

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        GoogleApiClient();
    }

    synchronized void GoogleApiClient() {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
        .addConnectionCallbacks(this)
        .addOnConnectionFailedListener(this)
        .addApi(LocationServices.API)
        .build();


    }

    @Override
    protected void onStart() {
        super.onStart();
        mGoogleApiClient.connect();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mGoogleApiClient.disconnect();
    }


}

Answer 3

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



if (mGoogleApiClient == null) {
    mGoogleApiClient = new GoogleApiClient.Builder(this)
        .addConnectionCallbacks(this)
        .addOnConnectionFailedListener(this)
        .addApi(LocationServices.API)
        .build();
}


       protected void onStart() {
    mGoogleApiClient.connect();
    super.onStart();
}

protected void onStop() {
    mGoogleApiClient.disconnect();
    super.onStop();
}



 public class MainActivity extends ActionBarActivity implements
    ConnectionCallbacks, OnConnectionFailedListener {

@Override
public void onConnected(Bundle connectionHint) {
    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
            mGoogleApiClient);
    if (mLastLocation != null) {
        mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
        mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
    }
}
}

供进一步参考see here

如何在不跟踪的情况下仅获取一次用户位置？

3 个答案: