当用户点击广告地理位置按钮时，我想在用户的当前位置添加地理围栏。但是，在使用融合的api客户端之后，它表明它还没有连接。我的代码就在这里 -
import android.Manifest;
import android.app.Service;
import android.content.Context;
import android.content.pm.PackageManager;
import android.database.sqlite.SQLiteDatabase;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.Geofence;
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.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import java.util.ArrayList;
public class MapsActivity extends FragmentActivity implements com.google.android.gms.location.LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private GoogleMap googleMap; // Might be null if Google Play services APK is not available.
public SQLiteDatabase db;
ArrayList<Geofence> mGeofences;
public double latitude = 77.80;
public double longitude = 55.76;
Double valueindex = 0.0;
private int request = 0;
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
/**
* Geofence Coordinates
*/
ArrayList<LatLng> mGeofenceCoordinates;
/**
* Geofence Store
*/
private GeofenceStore mGeofenceStore;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mGeofences = new ArrayList<Geofence>();
mGeofenceCoordinates = new ArrayList<LatLng>();
db = openOrCreateDatabase("CoordsDB", Context.MODE_PRIVATE, null);
// db.execSQL("CREATE TABLE IF NOT EXISTS Coordinates(number DOUBLE,latitude DOUBLE,longitude DOUBLE);");
// db.execSQL("INSERT INTO Coordinates VALUES('Fixed', 28.61,77.20)");
setContentView(R.layout.activity_maps);
SupportMapFragment supportMapFragment =
(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap);
/**
* SupportMapFragment belongs to the v4 support library, contrary to the default MagFragment that is a native component in Android.
SupportMapFragment will support more Android versions, but it is also an additional library you have to add in your project,
so I think it really depends on the Android versions you are targeting:
• On recent versions, the default components should be enough
• On older versions you will need to install the v4 support library and maybe others
*
*/
googleMap = supportMapFragment.getMap();
Log.i("My activity", "maps=" + googleMap);
googleMap.setMyLocationEnabled(true);
/**
* setMyLocationEnabled(true/false) shows the true location when the GPS is switched on from the device. It is an inbuilt feature of the googlemaps .
*/
LocationManager locationManager = (LocationManager) getSystemService(Service.LOCATION_SERVICE);
// getting GPS status
boolean isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
Log.i("My activity", "gps is" + isGPSEnabled);
// getting network status
boolean isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
Log.i("My activity", "network is" + isNetworkEnabled);
Criteria crta = new Criteria();
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.GINGERBREAD) {
crta.setAccuracy(Criteria.ACCURACY_FINE);
} else {
crta.setAccuracy(Criteria.ACCURACY_MEDIUM);
}
/**
* we have used .setAccuracy as fine for higher SDks than gingerbread .Gingerbread is used as a reference because in apks lower
* than gingerbread there is very poor geofencing, with gingerbread google made it a lot easier for locationservices to be used for devleopers.
* it had improved set of tools for Location Services, which included geofencing and substantially improved location discovery.
*/
crta.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationManager.getBestProvider(crta, true);
/**
* It request Location updates after every 5 sec or if the user traveled 10m
*/
Log.i("My activity", "manager is " + locationManager);
Log.i("My activity", "provider is " + provider);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
MapsActivity.this.requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 100);
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
return;
}
}
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) this)
.addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
Log.i("Api is",""+mGoogleApiClient);
}
mLocationRequest = new LocationRequest();
// We want a location update every 10 seconds.
mLocationRequest.setInterval(10000);
// We want the location to be as accurate as possible.
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
// Location location = locationManager.getLastKnownLocation(provider);
Location location = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
startLocationUpdates();
Log.i("Location is", location + "");
if (location != null) {
onLocationChanged(location);
}
/**
* the Permission is requested after every sec or at a distance of 0 metres by the user.
*/
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case 100: {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "Thanks for the permission", Toast.LENGTH_LONG).show();
// permission was granted, yay! do the
// calendar task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "You did not allow to access your current location", Toast.LENGTH_LONG).show();
}
}
// other 'switch' lines to check for other
// permissions this app might request
}
}
@Override
public void onLocationChanged(Location location) {
CameraPosition INIT =
new CameraPosition.Builder()
.target(new LatLng(location.getLatitude(), location.getLongitude()))
.zoom(17.5F)
.bearing(300F) // orientation
.tilt(50F) // viewing angle
.build();
// use GooggleMap mMap to move camera into position
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(INIT));
}
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
mGoogleApiClient.disconnect();
}
public void Add(View view) {
if (request <= 3) {
mGeofenceCoordinates.add(new LatLng(latitude, longitude));
Log.i("The id is", "" + valueindex);
mGeofences.add(new Geofence.Builder()
// The coordinates of the center of the geofence and the radius in meters.
.setRequestId("" + valueindex)
.setCircularRegion(latitude, longitude, 30)
.setExpirationDuration(Geofence.NEVER_EXPIRE)
// Required when we use the transition type of GEOFENCE_TRANSITION_DWELL
.setLoiteringDelay(50000)
.setTransitionTypes(
Geofence.GEOFENCE_TRANSITION_ENTER
| Geofence.GEOFENCE_TRANSITION_DWELL
| Geofence.GEOFENCE_TRANSITION_EXIT).build());
mGeofenceStore = new GeofenceStore(this, mGeofences);
valueindex++;
request++;
// Cursor c = db.rawQuery("SELECT * FROM Coordinates WHERE Id='"+valueindex+"'", null);
googleMap.addMarker(new MarkerOptions().snippet("Radius:30m").draggable(false).title(valueindex + "").position(new LatLng(latitude, longitude)));
} else {
Toast.makeText(this, "Maximum limit exceeded", Toast.LENGTH_LONG).show();
}
}
@Override
public void onConnected(Bundle bundle) {
Location mlastlocation;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
MapsActivity.this.requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 100);
// public void requestPermissions(@NonNull String[] permissions, int requestCode)
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
return;
}
}
mlastlocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
startLocationUpdates();
if (mlastlocation != null) {
Log.i("the last location:", "" + mlastlocation);
Toast.makeText(this, "Get last location first asshole!", Toast.LENGTH_LONG).show();
}
}
protected void startLocationUpdates() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
MapsActivity.this.requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 100);
// public void requestPermissions(@NonNull String[] permissions, int requestCode)
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
return;
}
LocationRequest mLocationRequest = new LocationRequest();
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
}
@Override
public void onConnectionSuspended(int i) {
Log.i("connection","suspended");
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i("Connection","Failed");
}
}
这是我的错误 -
java.lang.RuntimeException: Unable to start activity ComponentInfo{saksham.geofencing/saksham.geofencing.MapsActivity}: java.lang.IllegalStateException: GoogleApiClient is not connected yet.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.IllegalStateException: GoogleApiClient is not connected yet.
at com.google.android.gms.common.api.internal.zzh.zzb(Unknown Source)
at com.google.android.gms.common.api.internal.zzl.zzb(Unknown Source)
at com.google.android.gms.common.api.internal.zzj.zzb(Unknown Source)
at com.google.android.gms.location.internal.zzd.requestLocationUpdates(Unknown Source)
at saksham.geofencing.MapsActivity.startLocationUpdates(MapsActivity.java:276)
at saksham.geofencing.MapsActivity.onCreate(MapsActivity.java:139)
at android.app.Activity.performCreate(Activity.java:6245)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1130)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
和我的清单文件 -
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="saksham.geofencing" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but are recommended.
-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="@string/title_activity_maps" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<receiver android:name="com.aol.android.geofence.GeofenceReceiver"
android:exported="false">
<intent-filter >
<action android:name="com.aol.android.geofence.ACTION_RECEIVE_GEOFENCE"/>
</intent-filter>
</receiver>
</manifest>
请帮助，我是android的新手，即使在搜索了无数的博客之后，我已经被困住了很多天
答案 0 :(得分：1)
在您的onCreate方法中，您正确配置了Google API客户端并致电onConnect：
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) this)
.addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
Log.i("Api is",""+mGoogleApiClient);
}
但是，在此之下的几行（仍然在onCreate生命周期方法中），您有以下代码：
Location location = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
startLocationUpdates();
Log.i("Location is", location + "");
if (location != null) {
onLocationChanged(location);
}
我的猜测是，此部分的第一行导致了错误 - 您正在尝试检索某个位置，但此时Google API客户端仍未连接。由于您的onConnected回调中已有类似的代码，因此您应该可以从onCreate方法中删除我在上面引用的第二个代码块来解决问题。