Question

我在

的帮助下请求了位置更新

LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, 
locationRequest, locationListener);

但是当我试图在swtich onClickListener上提到它时，它崩溃了。但是，Android Studio本身没有错误。

我已经添加了在此功能中请求融合位置，粗略位置和Internet的权限。在请求更新之前，我甚至尝试连接谷歌Api客户端喜欢。，

if(googleApiClient.isConnected){
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, 
locationRequest, locationListener);
}else{
buildGoogleApiClient();
}

但我无法解决错误。使用融合位置提供程序Api删除位置请求也会导致应用程序崩溃。

我的清单文件的代码如下所示。如您所见，我已经请求了所需的权限

我的XML文件是

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >


    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        tools:context="com.matt.dumate.Welcome" />

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar3"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:background="#0064a2"
        android:weightSum="2">

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="start">

            <com.github.glomadrian.materialanimatedswitch.MaterialAnimatedSwitch
                android:id="@+id/locationSwitch"
                android:layout_width="20dp"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_centerInParent="true"
                android:layout_marginStart="0dp"
                android:layout_marginTop="0dp"
                app:ball_press_color="@android:color/white"
                app:ball_release_color="@color/ballReleaseColor"
                app:base_press_color="@color/basePressColor"
                app:base_release_color="@color/baseReleaseColor"
                app:icon_press="@drawable/ic_location_on"
                app:icon_release="@drawable/ic_location_off" />

        </RelativeLayout>

    </android.support.v7.widget.Toolbar>

    <Button
        android:id="@+id/bookingButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/toolbar3"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="5dp"
        android:layout_marginStart="90dp"
        android:layout_marginTop="5dp"
        android:background="@drawable/bookingbutton"
        android:gravity="center"
        android:text="@string/booking"
        android:textColor="@android:color/white" />


</RelativeLayout>

这是我的java文件。我正在学习像Uber这样的应用程序。

package com.matt.dumate;

import com.firebase.geofire.GeoFire;
import com.firebase.geofire.GeoLocation;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.github.glomadrian.materialanimatedswitch.MaterialAnimatedSwitch;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

public class Welcome extends FragmentActivity implements OnMapReadyCallback,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,
    LocationListener {

MaterialAnimatedSwitch location_switch;
SupportMapFragment mapFragment;

private Button btnBooking;
private Location lastLocation;
private GoogleApiClient.OnConnectionFailedListener onConnectionFailedListener;
private LocationRequest locationRequest;
private LocationListener locationListener;
private LocationManager locationManager;
private Marker marker;
private GoogleMap mMap;
private GoogleApiClient googleApiClient;
private final int RequestCode = 10;
private final int ResourceCode = 11;

private DatabaseReference databaseReference;
GeoFire geoFire;


@Override
protected void onCreate(Bundle savedInstanceState) {

    checkLocationPermission();
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_welcome);
    mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

    /***/
    databaseReference = FirebaseDatabase.getInstance().getReference("Drivers");
    geoFire = new GeoFire(databaseReference);
    setupLocation();
}

@Override
public void onMapReady(GoogleMap googleMap) {
    setupUiViews();
    mMap = googleMap;
    location_switch.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(location_switch.isChecked()){
                displayLocation();
                Snackbar.make(mapFragment.getView(), "You Are Online", Snackbar.LENGTH_SHORT).show();
            }else {
                stopLocationUpdates();
                Snackbar.make(mapFragment.getView(), "You Are Offline", Snackbar.LENGTH_SHORT).show();
                if (marker != null) {
                    marker.remove();
                }
            }
        }
    });

}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
        case RequestCode:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                if (checkPlayServices()){
                    buildGoogleApiClient();
                    createLocationRequest();
                    if (location_switch.isChecked()){
                        displayLocation();
                    }
                }
            }

    }
}

public void checkLocationPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
    {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION))
        {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, RequestCode);
        } else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, RequestCode);
        }
    } else {
        Toast.makeText(this, "Location Permissions Granted", Toast.LENGTH_SHORT).show();
    }
}

@Override
public void onConnected(@Nullable Bundle bundle) {
    locationRequest = LocationRequest.create()
            .setInterval(1000)
            .setFastestInterval(500)
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    startLocationUpdates();
    displayLocation();
}

@Override
public void onConnectionSuspended(int i) {
    googleApiClient.connect();
}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}

@Override
public void onLocationChanged(Location location) {
    lastLocation = location;
    displayLocation();

}

protected synchronized void buildGoogleApiClient() {
    googleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    googleApiClient.connect();
}

private void setupUiViews() {
    btnBooking = findViewById(R.id.bookingButton);
    location_switch = findViewById(R.id.locationSwitch);
}

private void displayLocation() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    lastLocation = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
    if (lastLocation != null ){
        if(location_switch.isChecked()){
            final Double lat = lastLocation.getLatitude();
            final Double lng = lastLocation.getLongitude();

            geoFire.setLocation(FirebaseAuth.getInstance().getCurrentUser().getUid(), new GeoLocation(lat, lng), new GeoFire.CompletionListener() {
                @Override
                public void onComplete(String key, DatabaseError error) {
                    if (marker != null) {
                        marker.remove();
                        marker = mMap.addMarker(new MarkerOptions().position(new LatLng(lat, lng)).icon(BitmapDescriptorFactory.fromResource(R.drawable.carmarker)).title("You"));

                        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng), 15.0f));
                    }else{
                        marker = mMap.addMarker(new MarkerOptions().position(new LatLng(lat, lng)).icon(BitmapDescriptorFactory.fromResource(R.drawable.carmarker)).title("You"));

                        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng), 15.0f));
                }
                }
            });
        }else{
            Toast.makeText(this, "Cannot Get Location Updates", Toast.LENGTH_SHORT).show();
        }
    }else{
        Log.d("Error", "Cannot Get Your Location");
    }
}

private void setupLocation() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
    {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION))
        {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, RequestCode);
        } else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, RequestCode);
        }
    }else{
        if (checkPlayServices()){
            buildGoogleApiClient();
            createLocationRequest();

        }
    }
}

private void createLocationRequest() {
    locationRequest = LocationRequest.create()
            .setInterval(1500)
            .setFastestInterval(500)
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
            .setSmallestDisplacement(0);
}

private boolean checkPlayServices(){
    int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
    if (resultCode != ConnectionResult.SUCCESS){
        if (GooglePlayServicesUtil.isUserRecoverableError(resultCode))
            GooglePlayServicesUtil.getErrorDialog(resultCode, this, ResourceCode).show();
        else {
            Toast.makeText(this, "This Device Is Not Supported", Toast.LENGTH_SHORT).show();
            finish();
        }return false;
    }
    return true;
}

private void stopLocationUpdates() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    //LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, locationListener);
}

private void startLocationUpdates() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    //LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, locationListener);
}

 }

Answer 1

融合位置服务的实现已经改变，您可以在没有GoogleApiClient的情况下实现。你可以尝试这样，

将所需的位置库添加到build.grade

implementation 'com.google.android.gms:play-services-location:15.0.0'

向清单
添加所需权限

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

内部Welcome活动

public class Welcome extends AppCompatActivity implements OnMapReadyCallback {

    ...
    ...

    private FusedLocationProviderClient mFusedLocationClient;

    private LocationRequest mLocationRequest = LocationRequest.create()
            .setInterval(1000)
            .setFastestInterval(500)
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    private LocationCallback mLocationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult result) {
            super.onLocationResult(result);
            for (Location location : result.getLocations())
                if (location != null) {
                    displayLocation(result.getLastLocation());
                    break;
                }
        }
    };

    ...
    ...

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

        ...
        ...

        // Get fussed location instance
        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);

        ...
        ...
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {

        ...
        ...

        // Check if location permission is granted
        if (!hasLocationPermission()) {
            // Request location permission
        } else {
            // Get the last known location
            startLocationUpdate();
        }
    }

    private void startLocationUpdate() {
        try {
            mFusedLocationClient.getLastLocation().addOnSuccessListener(new OnSuccessListener<Location>() {
                @Override
                public void onSuccess(Location location) {
                    if (location != null) {
                        displayLocation(location);
                    } else {
                    mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, null);
                    }
                }
            });
        } catch (SecurityException ex) {
            ex.printStackTrace();
        }
    }

    private boolean hasLocationPermission() {
        return ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED
            && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
            != PackageManager.PERMISSION_GRANTED;
    }

    private void stopLocationUpdate() {
        mFusedLocationClient.removeLocationUpdates(mLocationCallback);
    }

    private void displayLocation(Location location) {
        // do something
        ...
        ...
    }
}

Answer 2

您已在未初始化的locationListener的帮助下请求了位置更新。您可以通过初始化位置监听器或在代码的给定语句中将locationListener更改为this来解决问题。

LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, locationListener);

为：

LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);

在融合位置的帮助下请求位置更新时应用崩溃

2 个答案: