我是一名新手Android开发人员。我想制作一些GoogleMaps应用，它会在用户当前位置周围显示一些位置。但我没有捕获用户位置。我看了太多的文档，Google的谷歌地图教程。从stackoverflow搜索，但我找不到任何解决方案。
有我的HaritaFragment.java
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.analytics.HitBuilders;
import com.google.android.gms.analytics.Tracker;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.parse.FindCallback;
import com.parse.Parse;
import com.parse.ParseException;
import com.parse.ParseGeoPoint;
import com.parse.ParseObject;
import com.parse.ParseQuery;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class HaritaFragment extends Fragment implements LocationListener, GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static GoogleMap mGoogleMap;
public static HashMap<Marker, Markers> mMarkersHashMap = new HashMap<Marker, Markers>();
private ArrayList<Markers> mMyMarkersArray = new ArrayList<Markers>();
private Map<Marker, Markers> allMarkersMap = new HashMap<Marker, Markers>();
private static List<ParseObject>vetList = new ArrayList<ParseObject>();
private LatLng latLng;
private Double lat;
private Double lng;
private FusedLocationProviderApi fusedLocationProviderApi = LocationServices.FusedLocationApi;
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location userLocation;
String mLastUpdateTime;
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
setHasOptionsMenu(true);
return inflater.inflate(R.layout.fragment_harita, container, false);
}
public void onViewCreated(View view, Bundle savedInstanceState){
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (isGooglePlayServicesAvailable()) {
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
}
@Override
public void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
public void onStop() {
super.onStop();
//mGoogleApiClient.disconnect();
}
@Override
public void onPause() {
super.onPause();
stopLocationUpdates();
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
}
@Override
public void onResume() {
super.onResume();
if (isGooglePlayServicesAvailable()){
startLocationUpdates();
setupMap();
googleAnalyticsSendScreen();
getAllDataFromParse();
}
}
@Override
public void onLocationChanged(Location location) {
/*lat = (location.getLatitude());
lng = (location.getLongitude());*/
userLocation = location;
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.map_hibrit) {
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
}
else if (id == R.id.map_standart){
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
else if (id == R.id.map_uydu){
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConnected(Bundle bundle) {
startLocationUpdates();
}
protected void startLocationUpdates() {
/*PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);*/
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
有logcat输出：
06-11 17:54:43.361 17655-17855/packagename E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.IllegalStateException: GoogleApiClient is not connected yet.
at com.google.android.gms.internal.fp.a(Unknown Source)
at com.google.android.gms.common.api.w.a(Unknown Source)
at com.google.android.gms.internal.hy.a(Unknown Source)
at packagename.r.P(Unknown Source)
at packagename.r.t(Unknown Source)
at android.support.v4.app.Fragment.I(Unknown Source)
at android.support.v4.app.w.a(Unknown Source)
at android.support.v4.app.w.a(Unknown Source)
at android.support.v4.app.e.run(Unknown Source)
at android.support.v4.app.w.f(Unknown Source)
at android.support.v4.app.w.b(Unknown Source)
at android.support.v4.app.ac.b(Unknown Source)
at android.support.v4.view.ViewPager.a(Unknown Source)
at android.support.v4.view.ViewPager.c(Unknown Source)
at android.support.v4.view.ViewPager.onMeasure(Unknown Source)
at android.view.View.measure(View.java:13011)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
at android.view.View.measure(View.java:13011)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(Unknown Source)
at android.view.View.measure(View.java:13011)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
at android.view.View.measure(View.java:13011)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1369)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:660)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
at android.view.View.measure(View.java:13011)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2163)
at android.view.View.measure(View.java:13011)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1084)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2498)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4944)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
有什么问题？我尝试了4.0.1真正的HTC设备和4.4.4 GenyMotion与GooglePlayServices。
我想让用户从Parse.com附近找到位置，我必须捕获此方法的用户位置：
if (userLocation != null) {
ParseGeoPoint parsedLocation = (new ParseGeoPoint(userLocation.getLatitude(), userLocation.getLongitude()));
ParseQuery<ParseObject> query = ParseQuery.getQuery("Vets");
query.fromLocalDatastore();
query.whereNear("location", parsedLocation);
//query.whereWithinKilometers("location",userLocation,100);
query.setLimit(250);
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> list, ParseException e) {
if (e == null) {
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(getString(R.string.parse_online_query_error_title));
builder.setMessage(getString(R.string.parse_online_query_error_message));
builder.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
}
}
});
}
如果你告诉我另一种方法。这对我有好处。我不会坚持使用FusedLocationProviderApi。
谢谢！
答案 0 :(得分：2)
看起来你的订单错误。了解Android在启动，暂停和恢复活动时所采用的顺序非常重要。
http://developer.android.com/training/basics/activity-lifecycle/pausing.html
代码中的问题是当您点击onResume mGoogleApiClient可能没有完全连接时。
这是您应该拥有的订单
- 从onConnected内部调用startLocationUpdates（）
执行上述操作意味着当您请求位置更新时，您的Api客户端始终处于连接状态。
我认为修复代码的最快方法是删除onPause和onResume方法，并在onStop中取消注释onDisconnect。
允许onStart和onStop依次处理您的连接和连接以处理位置更新。
祝你好运。