如何在服务中使用 Fuse android 位置提供程序？答案

【问题标题】：How to use Fuse android location provider in a service?如何在服务中使用 Fuse android 位置提供程序？
【发布时间】：2019-03-31 04:56:36
【问题描述】：

我正在尝试在 android 的服务中使用 Fuse 提供程序来获取后台位置。

  private void init() {
    context = this;
    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
    mSettingsClient = LocationServices.getSettingsClient(this);

    mLocationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult locationResult) {
            super.onLocationResult(locationResult);
            // location is received
            mCurrentLocation = locationResult.getLastLocation();
            mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());

            showLocation();
        }
    };

    mRequestingLocationUpdates = false;

    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
    builder.addLocationRequest(mLocationRequest);
    mLocationSettingsRequest = builder.build();
}

   private void startLocationUpdates() {
    mSettingsClient
            .checkLocationSettings(mLocationSettingsRequest)
     =====>>>>       .addOnSuccessListener(this, new OnSuccessListener<LocationSettingsResponse>() {
                @SuppressLint("MissingPermission")
                @Override
                public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
                    Log.i(TAG, "Started location updates!");
                    mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.myLooper());

                     showLocation();
                }
            })
    =====>>>>        .addOnFailureListener(this, new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {

                }
            });
}

在服务中我不能使用“this”，因为它指的是一个活动。

我想知道如何在服务中实现这段代码？

【问题讨论】：

标签： android service android-fusedlocation

【解决方案1】：

我已经把它改成了这个，并且工作了......

    private void init() {
    context = this;
    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
    mSettingsClient = LocationServices.getSettingsClient(this);

    mLocationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult locationResult) {
            super.onLocationResult(locationResult);
            // location is received
            mCurrentLocation = locationResult.getLastLocation();
            mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());

            showLocation();
        }
    };

    mRequestingLocationUpdates = false;

    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
    builder.addLocationRequest(mLocationRequest);
    mLocationSettingsRequest = builder.build();
    }



     private void startLocationUpdates() {
        mSettingsClient
                .checkLocationSettings(mLocationSettingsRequest)
         =====>>>>       .addOnSuccessListener(new OnSuccessListener<LocationSettingsResponse>() {
                    @SuppressLint("MissingPermission")
                    @Override
                    public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
                        Log.i(TAG, "Started location updates!");
                        mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.myLooper());

                     showLocation();
                }
            })
    =====>>>>        .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {

                }
            });
}

【讨论】：