enter image description here我的Android应用程序出现问题，应用程序中的GPS不能正常运行，但是当我运行Google地图并再次运行时，它运行良好。我不知道原因
public void getDeviceLocation(){
mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
try{
final Task location = mFusedLocationProviderClient.getLastLocation();
location.addOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
if(task.isSuccessful() && task.getResult() != null){
Location currentLocation = (Location) task.getResult();
longitude = currentLocation.getLongitude();
latitude = currentLocation.getLatitude();
}else{
Toast.makeText(MapsActivity.this,"unable to get your current location, please refresh the page or check your internet access is good",Toast.LENGTH_SHORT).show();
}
}
});
}catch (SecurityException e){
Log.e(TAG,"Security exception: " + e.getMessage());
}
}
在清单中：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
这是请求打开GPS的方法，此代码会弹出一个对话框，告诉他是否接受打开GPS
private void displayLocationSettingsRequest(Context context) {
GoogleApiClient googleApiClient = null;
if (googleApiClient == null) {
googleApiClient = new GoogleApiClient.Builder(context)
.addApi(LocationServices.API).addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
googleApiClient.connect();
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(5 * 1000);
locationRequest.setFastestInterval(5 * 1000 / 2);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
builder.setAlwaysShow(true);
PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, 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:
toast("Success");
// All location settings are satisfied. The client can
// initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
toast("GPS is not on");
// 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(decision.this, 1000);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
toast("Setting change not allowed");
// Location settings are not satisfied. However, we have
// no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
}