位置更新 - 忽略模糊的位置更改

Question

我正在尝试在Android应用中使用自定义用户位置标记实现谷歌地图 我正在使用FusedLocationApi来接收位置更新，并遇到一个问题，即在onLocationChanged（）中，即使设备没有移动，我每次都会收到非常不同的位置，但是会停留在一个位置。 因此，用户位置和精度半径每分钟改变几次（显示正确和错误的位置）。 我知道这是因为从不同来源接收位置，但如何确定权利，忽略错误和模糊的位置？ 试图实现一个函数来忽略错误的位置变化，但它不能按预期工作 在图片中，它在一分钟内看起来像用户（用户停留在一个位置）：

代码

private static final long UPDATE_INTERVAL_IN_MILLISECONDS = 10000;
private static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
            UPDATE_INTERVAL_IN_MILLISECONDS / 2;

// build GoogleApiClient
protected synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    createLocationRequest();
}
// create location request
protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}

// ... here is how I request the updates
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest,this);

/**
 * Callback that fires when the location changes.
 */
@Override
public void onLocationChanged(Location location) {
    // TODO herre I try to figure out which location is right and which is wrong
    if (shouldIgnoreLocationChange(mLastDrawnLocation, location)) {
        return;
    }

    // here i should proceed only with eight location...

}

/**
 * Checks whether location change (coordinates) should be ignored or not
 *
 * @param oldLocation previous {@link Location}
 * @param newLocation new  {@link Location}
 * @return true if coordinates change should be ignored because it is not significant
 */
private boolean shouldIgnoreLocationChange(Location oldLocation, Location newLocation) {
    if (oldLocation == null) {
        // didn't have any location before, so accept new
        return false;
    } else if (null == newLocation || !newLocation.hasAccuracy() || newLocation.getAccuracy() > 150) {
        // new location got invalid or too vague accuracy so ignore it
        return true;
    }

    // ignore change if change is smaller then 3 meters and
    if (oldLocation.distanceTo(newLocation) < 3f && newLocation.getAccuracy() >= oldLocation.getAccuracy()) {
        return true;
    }
    return false;
}

但是，如果我使用内置用户用户位置图层 - 它可以很好地工作 我错过了什么？

Answer 1

我不确定这是否是问题，但在Android文档中显示并建议使用

    protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}

// ... here is how I request the updates
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest,this);

连接Google客户端后。

Link to the documentation

除此之外，我没有发现任何特殊错误。

顺便说一句

您要求哪些权限？

您应该使用<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

代表LocationRequest.PRIORITY_HIGH_ACCURACY