在手机上获取当前位置，不起作用？ [安卓]
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【中文标题】在手机上获取当前位置，不起作用？ [安卓]【英文标题】：Getting current location on phone, not working? [Android] 【发布时间】：2016-08-05 19:52:39 【问题描述】：到目前为止。它应该在两个单独的文本视图中将当前位置显示为纬度和经度。
我已经在模拟器和真正的 android 手机上尝试过，但两者都不起作用。没有任何反应，文本视图不显示任何坐标。也没有错误。
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener
private static final int LOCATION_REQUEST_INTERVAL = 60000;
private static final int LOCATION_REQUEST_FASTEST = 15000;
private static final int MY_PERMISSION_REQUEST_READ_COARSE_LOCATION = 102;
private TextView latitudeTextView;
private TextView longitudeTextView;
private ImageButton imageButton;
private GoogleApiClient googleApiClient;
private LocationRequest locationRequest;
private FusedLocationProviderApi fusedLocationProviderApi = LocationServices.FusedLocationApi;
private double mLatitude;
private double mLongitude;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
latitudeTextView = (TextView) findViewById(R.id.latitudeTextView);
longitudeTextView = (TextView) findViewById(R.id.longitudeTextView);
imageButton = (ImageButton) findViewById(R.id.imageButton);
googleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
locationRequest = new LocationRequest();
locationRequest.setInterval(LOCATION_REQUEST_INTERVAL);
locationRequest.setFastestInterval(LOCATION_REQUEST_FASTEST);
locationRequest.setPriority(locationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
@Override
public void onConnected(@Nullable Bundle bundle)
requestLocationUpdates();
private void requestLocationUpdates()
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
ActivityCompat.requestPermissions(this,
new String[]Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION,
MY_PERMISSION_REQUEST_READ_COARSE_LOCATION);
return;
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
@Override
public void onConnectionSuspended(int i)
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult)
@Override
public void onLocationChanged(Location location)
mLatitude = location.getLatitude();
mLongitude = location.getLongitude();
latitudeTextView.setText(String.valueOf(mLatitude));
longitudeTextView.setText(String.valueOf(mLongitude));
@Override
protected void onStart()
super.onStart();
googleApiClient.connect();
@Override
protected void onStop()
super.onStop();
googleApiClient.disconnect();
@Override
protected void onResume()
super.onResume();
if(googleApiClient.isConnected())
requestLocationUpdates();;
@Override
protected void onPause()
super.onPause();
LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient,this);
为什么它不起作用？我遵循了一些指南，其中之一是 android 开发者指南。
您有什么想法或建议吗？
感谢您的任何意见。
【问题讨论】：
您需要使用Log.d 来识别哪一行代码不能正常工作。一旦你找到一个意想不到或没有价值的点，然后发布问题。所以在每一行后面加上一个Log.d 语句。如果您不弄清楚到底是什么不起作用，就要求浪费他们的时间是没有意义的。
【参考方案1】：
根据我的经验，模拟器不适用于PRIORITY_BALANCED_POWER_ACCURACY，但需要PRIORITY_HIGH_ACCURACY。
更改代码行
locationRequest.setPriority(locationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
到
LocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
我还注意到权限请求对话框仅授予粗略位置的权限。我会把它改成好的位置。更改代码行：
new String[] Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION, MY_PERMISSION_REQUEST_READ_COARSE_LOCATION);
到
requestPermissions(new
String[]Manifest.permission.ACCESS_FINE_LOCATION,
MY_PERMISSION_REQUEST_FINE_LOCATION);
并为MY_PERMISSION_REQUEST_FINE_LOCATION定义一个字符串值
最后，检查设备或模拟器是否已授予位置权限。转到“设置”->“应用程序”并检查该应用程序是否正在使用定位服务。如果没有，请点击“权限”并打开服务。
【讨论】：
嗨，欢迎来到 SO。发布时，请在发布代码时使用代码格式标记 - 请参阅指南***.com/editing-help#code。快乐的黑客攻击！【参考方案2】：创建一个类GpsTracker.java：
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.GpsStatus;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
public class GPSTracker extends Service implements LocationListener
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 100000 * 60 * 1; // 5 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context)
this.mContext = context;
getLocation();
public Location getLocation()
try
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
// getting GPS status
//isGPSEnabled = locationManager
//.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled)
// no network provider is enabled
//showSettingsAlert();
else
this.canGetLocation = true;
if (isNetworkEnabled)
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null)
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null)
latitude = location.getLatitude();
longitude = location.getLongitude();
// if GPS Enabled get lat/long using GPS Services
else
if(isGPSEnabled)
if (location == null)
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null)
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null)
latitude = location.getLatitude();
longitude = location.getLongitude();
catch (Exception e)
e.printStackTrace();
return location;
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS()
if(locationManager != null)
locationManager.removeUpdates(GPSTracker.this);
/**
* Function to get latitude
* */
public double getLatitude()
if(location != null)
latitude = location.getLatitude();
// return latitude
return latitude;
/**
* Function to get longitude
* */
public double getLongitude()
if(location != null)
longitude = location.getLongitude();
// return longitude
return longitude;
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation()
return this.canGetLocation;
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert()
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog,int which)
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
);
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener()
public void onClick(DialogInterface dialog, int which)
dialog.cancel();
System.exit(0);
);
// Showing Alert Message
alertDialog.show();
@Override
public void onLocationChanged(Location location)
@Override
public void onProviderDisabled(String provider)
@Override
public void onProviderEnabled(String provider)
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
@Override
public IBinder onBind(Intent arg0)
return null;
现在您可以获取 GpsTracker.java 的位置创建实例，例如：
GPSTracker gpstracker=new GPSTracker(EditProfile.this);
double lat=gpstracker.getLatitude();
double longitude=gpstracker.getLongitude();
【讨论】：
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