嗨，我是android开发的新手。这是我的方案按钮单击在我的应用程序中显示Google Map片段中的当前位置。
现在我按下了按钮，点击了当前位置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();
}
}
答案 0 :(得分：1)
您可以使用它来获取与纬度和经度相对应的地址
Geocoder geocoder;
List<Address> address;
geocoder = new Geocoder(this, Locale.getDefault());
address = geocoder.getFromLocation(latitude, longitude, 1);
然后使用此
String city = address.get(0).getLocality();
String state = address.get(0).getAdminArea();
答案 1 :(得分：1)
使用此方法
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);
}
答案 2 :(得分：1)
根据您的评论，您需要在项目中使用Google地图。您可以使用Android Studio轻松地在应用中添加Google地图活动。 文件＆gt;新＆gt; Google＆gt; Google地图活动将添加一个内置Google地图片段的新活动。您可以将thid片段添加到现有活动中。但首先，您need to get a Google Developers API key在应用程序中显示Google地图。有两种方式显示用户的当前位置：
第一种方式
您可以手动获取位置，并使用地图上的标记显示
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
您可以在应用中的Google地图中启用当前位置功能。确保您拥有位置权限。
public void onMapReady(GoogleMap googleMap) {
googleMap.setMyLocationEnabled(true);
}
答案 3 :(得分：1)
我曾经习惯谷歌服务的位置。在课堂下面使用以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'
然后用于下面的课程..
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lat和long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());
}
}