【发布时间】：2017-11-22 19:19:43
【问题描述】：
实际上我创建了一个应用程序来显示最近的加油站，所以我使用了 FusedLocationApi，首先在代码中检查使用位置是否启用，如果没有，我构建 GoogleClient 并调用 setingsrequest() 函数并且如果位置打开，应用程序可以正常工作，但是当位置关闭时应用程序崩溃..请检查日志
日志：
E/UncaughtException: java.lang.IllegalStateException: GoogleApiClient 尚未连接。 在 com.google.android.gms.internal.zzbcc.zze（未知来源） 在 com.google.android.gms.internal.zzbcw.zze（未知来源） 在 com.google.android.gms.internal.zzbco.zze（未知来源） 在 com.google.android.gms.internal.zzcca.requestLocationUpdates（未知 资源） 在 活动.FuelStations.onConnected(FuelStations.java:356) 在 com.google.android.gms.common.internal.zzac.zzn（未知来源） 在 com.google.android.gms.internal.zzbco.zzm（未知来源） 在 com.google.android.gms.internal.zzbcc.zzpY（未知来源） 在 com.google.android.gms.internal.zzbcc.onConnected（未知来源） 在 com.google.android.gms.internal.zzbcw.onConnected（未知来源） 在 com.google.android.gms.internal.zzbbh.onConnected（未知来源） 在 com.google.android.gms.common.internal.zzaa.onConnected（未知 资源） 在 com.google.android.gms.common.internal.zzn.zzrj（未知来源） 在 com.google.android.gms.common.internal.zze.zzs（未知来源） 在 com.google.android.gms.common.internal.zzi.zzrk（未知来源） 在 com.google.android.gms.common.internal.zzh.handleMessage（未知 资源） 在 android.os.Handler.dispatchMessage(Handler.java:102) 在 android.os.Looper.loop(Looper.java:148) 在 android.app.ActivityThread.main(ActivityThread.java:5417) 在 java.lang.reflect.Method.invoke（本机方法） 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
更新代码：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate ...............................");
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable()) {
finish();
}
setContentView(R.layout.activity_fuel_stations);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
LocationManager mlocManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
final boolean enabled = mlocManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if(!enabled) {
mGoogleApiClient.connect();
setingsrequest();
}
else
{
init();
}
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
}
}
public void setingsrequest()
{
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setFastestInterval(5 * 1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
builder.setAlwaysShow(true); //this is the key ingredient
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(FuelStations.this, REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
// Check for the integer request code originally supplied to startResolutionForResult().
case REQUEST_CHECK_SETTINGS:
switch (resultCode) {
case Activity.RESULT_OK:
Toast.makeText(getApplicationContext(),"Location is on",Toast.LENGTH_SHORT).show();
init();
break;
case Activity.RESULT_CANCELED:
//keep asking if imp or do whatever
finish();
break;
}
break;
}
}
private void init(){
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
tempGoogleMap = mGoogleMap;
//MAP_FLAG=1;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
} else {
checkLocationPermission();
}
} else {
mGoogleApiClient.connect();
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.getUiSettings().setMapToolbarEnabled(true);
//the below listener is depreceated so i have to find a different way
// mGoogleMap.setOnMyLocationButtonClickListener(myLocationChangeListener);
mGoogleMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() {
@Override
public boolean onMyLocationButtonClick() {
Location loc = mGoogleMap.getMyLocation();
LatLng currentLoc = new LatLng(loc.getLatitude(), loc.getLongitude());
mGoogleMap.clear();
markerOptions.position(currentLoc);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLoc,15.0f));
nearestFuelStation();
return true;
}
});
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(this)
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(FuelStations.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent intent= new Intent(getApplicationContext(),MainMenu.class);
startActivity(intent);
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConnected(Bundle bundle) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// 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 ActivityCompat#requestPermissions for more details.
return;
} startLocationUpdates();
mLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLocation == null){
startLocationUpdates();
}
if (mLocation != null) {
double latitude = mLocation.getLatitude();
double longitude = mLocation.getLongitude();
} else {
// Toast.makeText(this, "Location not Detected", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onConnectionSuspended(int i) {
if (i == CAUSE_SERVICE_DISCONNECTED) {
Toast.makeText(this, "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show();
} else if (i == CAUSE_NETWORK_LOST) {
Toast.makeText(this, "Network lost. Please re-connect.", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(getApplicationContext(),"Connection Failed",Toast.LENGTH_SHORT).show();
}
@Override
public void onLocationChanged(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
if (mGoogleMap!=null)
mGoogleMap.clear();
//Place current location marker
latitude = location.getLatitude();
longitude = location.getLongitude();
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,15.0f));
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
nearestFuelStation();
}
private void nearestFuelStation() {
String FuelStation = "gas_station";
}
private String getUrl(double latitude, double longitude, String nearbyPlace) {
}
@Override
protected void onStart() {
if(mGoogleApiClient != null){
mGoogleApiClient.connect();
}
super.onStart();
Log.d("client value", String.valueOf(mGoogleApiClient.isConnected()));
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onStop() {
// Disconnecting the client invalidates it.
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
if(mGoogleApiClient!=null){
{
mGoogleApiClient.disconnect();}
}
super.onStop();
}
// Trigger new location updates at interval
protected void startLocationUpdates() {
// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
mLocationRequest, this);
}
}
}
【问题讨论】：
-
在去请求之前最好检查连接。它是因为 GoogleApiClient 断开了连接。断开调用请求后抛出此错误 java.lang.IllegalStateException: GoogleApiClient is not connected yet.
-
但我只在 onPause() 方法中断开连接
-
您应该在 Activity 的 onCreate(Bundle) 方法中实例化一个客户端对象，然后在 onStart() 中调用 connect()，在 onStop() 中调用 disconnect()，无论状态如何。
-
断开连接后为什么要请求位置更新。所以最好检查这样的连接 if(this.googleApiClient != null){ this.googleApiClient.connect(); }
-
因此您必须等待 onConnected() 回调，然后 mGoogleApiClient.isConnected() 才会返回 true，您可以使用 GoogleApiClient 请求位置更新。
标签： java android google-maps android-fusedlocation