按钮单击在谷歌地图中显示当前位置

Question

嗨，我是 android 开发的新手。这是我的场景 Button click show current location in Google Map fragment in my application.

现在我点击按钮显示当前位置 lattitude 和 longitude。

这是我的代码：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button_location"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="13dp"
        android:text="Start" />

    <TextView
        android:id="@+id/text_location"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:textSize="16dp"/>


</RelativeLayout>

MainActivity.java

package com.example.hello.sampleapp;

import android.Manifest;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private static final int REQUEST_LOCATION = 1;

    Button button;
    TextView textView;
    LocationManager locationManager;
    String lattitude,longitude;

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

        ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);

        textView = (TextView)findViewById(R.id.text_location);
        button = (Button)findViewById(R.id.button_location);
        button.setOnClickListener(this);

    }

    @Override
    public void onClick(View view) {
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            buildAlertMessageNoGps();

        } else if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            getLocation();
        }
    }


    private void getLocation() {
        if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission
                (MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);

        } else {
            Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

            Location location1 = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

            Location location2 = locationManager.getLastKnownLocation(LocationManager. PASSIVE_PROVIDER);

            if (location != null) {
                double latti = location.getLatitude();
                double longi = location.getLongitude();
                lattitude = String.valueOf(latti);
                longitude = String.valueOf(longi);

                textView.setText("Your current location is"+ "\n" + "Lattitude = " + lattitude
                        + "\n" + "Longitude = " + longitude);

            } else  if (location1 != null) {
                double latti = location1.getLatitude();
                double longi = location1.getLongitude();
                lattitude = String.valueOf(latti);
                longitude = String.valueOf(longi);

                textView.setText("Your current location is"+ "\n" + "Lattitude = " + lattitude
                        + "\n" + "Longitude = " + longitude);


            } else  if (location2 != null) {
                double latti = location2.getLatitude();
                double longi = location2.getLongitude();
                lattitude = String.valueOf(latti);
                longitude = String.valueOf(longi);

                textView.setText("Your current location is"+ "\n" + "Lattitude = " + lattitude
                        + "\n" + "Longitude = " + longitude);
                String url = "https://iradivi.com/test/?latitude=" + lattitude +"&longitude=" + longitude;


            }else{

                Toast.makeText(this,"Unble to Trace your location",Toast.LENGTH_SHORT).show();

            }
        }
    }

    protected void buildAlertMessageNoGps() {

        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("Please Turn ON your GPS Connection")
                .setCancelable(false)
                .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                    public void onClick(final DialogInterface dialog, final int id) {
                        startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                    }
                })
                .setNegativeButton("No", new DialogInterface.OnClickListener() {
                    public void onClick(final DialogInterface dialog, final int id) {
                        dialog.cancel();
                    }
                });
        final AlertDialog alert = builder.create();
        alert.show();
    }

}

抱歉这个问题，我不知道该怎么问。

Answer 1

你可以用它来获取经纬度对应的地址

Geocoder geocoder;
List<Address> address;
geocoder = new Geocoder(this, Locale.getDefault());

address = geocoder.getFromLocation(latitude, longitude, 1);

那就用这个

String city = address.get(0).getLocality();
String state = address.get(0).getAdminArea();

Answer 2

使用这个方法

public void setUpCurrentLocation(double latitude, double longitude) {
    if (latitude == 0 || longitude == 0)
        return;
    LatLng latLng = new LatLng(latitude, longitude);
    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, AppConstants.MAP_MAX_ZOOM);
    mGoogleMap.animateCamera(cameraUpdate);
}

Answer 3

根据您的评论，您的项目中需要 Google 地图。您可以使用 Android Studio 在您的应用程序中轻松添加 Google 地图活动。 File > New > Google > Google Maps Activity 将添加一个包含 Google Maps 片段的新 Activity。您可以将这个片段添加到您现有的活动中。但首先，您 need to get a Google Developers API key 在您的应用程序中显示 Google 地图。显示用户当前位置的方式有两种：

第一种方式

您可以手动获取位置并在地图上用标记显示它

public void onMapReady(GoogleMap googleMap) {
    LatLng currentLocation = new LatLng(location.getLatitude(), location.getLongitude());
    googleMap.addMarker(new MarkerOptions().position(currentLocation)
            .title("Current Location"));
    googleMap.moveCamera(CameraUpdateFactory.newLatLng(currentLocation));
}

您可以在 here. 中找到完整的指南和文档

第二种方式

您可以在您的应用程序中启用 Google 地图中的当前位置功能。确保您拥有位置权限。

public void onMapReady(GoogleMap googleMap) {
    googleMap.setMyLocationEnabled(true);
}

Answer 4

我用于谷歌服务位置的东西。在类下面使用来获取当前位置和其他信息...... 在 gradle 文件中添加以下依赖项。

    compile 'com.google.android.gms:play-services:9.2.0'
compile 'com.google.android.gms:play-services-location:9.2.0'

然后在使用下面的类之后..

public class GPSController  implements
    LocationListener,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener

{ OnLocationUpdateListener onLocationUpdateListener; public final String TAG = getClass().getSimpleName();

private FusedLocationProviderApi fusedLocationProviderApi = LocationServices.FusedLocationApi;
GoogleApiClient googleApiClient;
LocationRequest mLocationRequest;
Location mCurrentLocation;
private static long INTERVAL = 1000 * 10;
private static long FASTEST_INTERVAL = 1000 * 5;
FragmentActivity mActivity;
private boolean isLiveUpdate = false;


PendingResult<LocationSettingsResult> result;


/**
 * Checking permission and connect with Google Location service
 * @param activity
 */
public GPSController(FragmentActivity activity) {

    this.mActivity = activity;
    if(PermissionManager.checkPermission(mActivity,PermissionManager.ACCESS_LOCATION))
    {
        if (!isGooglePlayServicesAvailable()) {
            CustomLogHandler.printInfolog("checking googleplayservice : ", "false");
            ((BaseActivity)mActivity).showAlertDialog(mActivity, mActivity.getString(R.string.app_name), mActivity.getString(R.string.play_service_not_found));
        } else {
            CustomLogHandler.printInfolog("checking googleplayservice : ", "true");
            createLocationRequest();
            initFuseAPI();

        }
    }
    else
    {
        PermissionManager.askForPermission(PermissionManager.ACCESS_LOCATION,mActivity);
    }

}

public void connectForLocation()
{
    createLocationRequest();
    initFuseAPI();
}

/**
 * Turn on Live update of location on given interval
 * @param value
 * @param INTERVAL
 * @param FASTEST_INTERVAL
 */
public void turnOnLiveUpdate(boolean value,long INTERVAL,long FASTEST_INTERVAL)
{
    isLiveUpdate = value;
    this.INTERVAL = INTERVAL;
    this.FASTEST_INTERVAL = FASTEST_INTERVAL;
}

/**
 * Turn off live update of location
 */
public void turnOffLiveUpdate()
{
    isLiveUpdate = false;
}

/**
 * Disconnect from Google location service
 */
public void disconnect()
{
    try {
        Log.d(TAG, "onStop fired ..............");
        googleApiClient.disconnect();
        Log.d(TAG, "isConnected ...............: " +googleApiClient.isConnected());
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}

/**
 * Resume Location update service if stopped
 */
public void onResumeUpdate()
{
    try {
        if(googleApiClient != null) {
            if (googleApiClient.isConnected()) {
                startLocationUpdates();
                Log.d(TAG, "Location update resumed .....................");
            }
        }
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}


public void setLocatonUpdateListener(OnLocationUpdateListener onLocationUpdateListener)
{
    this.onLocationUpdateListener  = onLocationUpdateListener;
}

/**
 * Create location update request
 */
protected void createLocationRequest() {
    try {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(INTERVAL);
        mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}


/**
 * Initialize google location service
 */
void initFuseAPI()
{
    try
    {
        googleApiClient = new GoogleApiClient.Builder(mActivity)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
        Log.d(TAG, "initFuseAPI fired ..............");
        googleApiClient.connect();
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}


/**
 * Check Google location service is available or not
 * @return
 */
private boolean isGooglePlayServicesAvailable() {
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(mActivity);
    if (ConnectionResult.SUCCESS == status) {
        return true;
    } else {
        GooglePlayServicesUtil.getErrorDialog(status, mActivity, 0).show();
        return false;
    }
}

/**
 * called when connected with google location service
 * @param bundle
 */
@Override
public void onConnected( Bundle bundle) {
    Log.d(TAG, "onConnected - isConnected ...............: " + googleApiClient.isConnected());
    LocationManager manager = (LocationManager) mActivity.getSystemService(Context.LOCATION_SERVICE );
    boolean statusOfGPS = manager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    if(statusOfGPS) {
        startLocationUpdates();
    }else
    {
        enableGpsService();
    }
}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed( ConnectionResult connectionResult) {

}

/**
 * Location update received here
 * @param location
 */
@Override
public void onLocationChanged(Location location) {
    Log.d(TAG, "Firing onLocationChanged..............................................");
    mCurrentLocation = location;
    SetLocation();
}


void enableGpsService()
{
    try
    {
        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                .addLocationRequest(mLocationRequest);
        builder.setAlwaysShow(true);
        result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
        result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
            @Override
            public void onResult( LocationSettingsResult locationSettingsResult) {
                final Status status = locationSettingsResult.getStatus();
                switch (status.getStatusCode()) {
                    case LocationSettingsStatusCodes.SUCCESS:
                        //already connected to GPS
                        startLocationUpdates();
                        break;
                    case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                        // Location settings are not satisfied. But could be fixed by
                        // showing the user a dialog.
                        try {
                            status.startResolutionForResult(mActivity, PermissionManager.REQUEST_LOCATION);
                            startLocationUpdates();
                        } catch (IntentSender.SendIntentException e) {
                            // Ignore the error.
                        }
                        break;
                    case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                        //redirect user to setting screen, manually user can enble GPS
                        mActivity.startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                        break;
                }
            }
        });
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}





/**
 * Request location update service
 */
public void startLocationUpdates()
{
    try {
        //check required even you checked it previously
        if (PermissionManager.checkPermission(mActivity, PermissionManager.ACCESS_LOCATION))
        {
            fusedLocationProviderApi.requestLocationUpdates(googleApiClient, mLocationRequest, this);
            Log.d(TAG, "Location update started ..............: ");
        } else {
            PermissionManager.askForPermission(PermissionManager.ACCESS_LOCATION, mActivity);
        }
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}

/**
 * Stop location update
 */
public void stopLocationUpdates() {
    try {
        if(googleApiClient != null) {
            fusedLocationProviderApi.removeLocationUpdates(
                    googleApiClient, this);
            Log.d(TAG, "Location update stopped .......................");
        }
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}


/**
 * set location values received
 */
private void SetLocation()
{
    try {
        Log.d(TAG, "UI update initiated .............");
        if (null != mCurrentLocation) {
            onLocationUpdateListener.onLocationUpdate(mCurrentLocation);

            /**isLiveUpdate = true for Live update **/

            if (!isLiveUpdate) {
                fusedLocationProviderApi.removeLocationUpdates(googleApiClient,this);
            }
            googleApiClient.disconnect();

            //mCurrentLocation.getAccuracy()
            //mCurrentLocation.getProvider()

        } else {
            Log.d(TAG, "location is null ...............");
        }
    }catch (Throwable throwable)
    {
        throwable.printStackTrace();
    }
}

public Location getLocation(){
    return mCurrentLocation;
}
public static List<Address> getAddress(Double mLat, Double mLang, Context context)
{
    List<Address> addresses = null;
    try
    {
        Geocoder geocoder = new Geocoder(context, Locale.getDefault());
        addresses = geocoder.getFromLocation(mLat, mLang, 1);
    }catch (Exception e)
    {
        e.printStackTrace();
    }
    return  addresses;
}

/**
 * For receive location update
 */
public interface OnLocationUpdateListener {
     void onLocationUpdate(Location mCurrentLocation);
}

}

然后将此类初始化为主要活动并获取当前位置的纬度和经度值..

public class LocationActivity extends AppCompatActivity  implements GPSController.OnLocationUpdateListener{

private static final int REQUEST_LOCATION = 1;

private GPSController gpsController;
Button button;
TextView textView;
LocationManager locationManager;
String lattitude,longitude;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.location_layout);
    gpsController = new GPSController(getActivity());
    gpsController.setLocatonUpdateListener(this);

}
@Override
public void onLocationUpdate(Location mCurrentLocation) {
    CURRENT_LET = String.valueOf(mCurrentLocation.getLatitude());
    CURRENT_LANG = String.valueOf(mCurrentLocation.getLongitude());
 }

}