如果禁用，Android 获取位置或提示启用位置服务

问题描述

我在其他帖子中发现了这个答案的零碎，但我想在这里记录下来以供其他人使用.

I've found bits and pieces of this answer scattered through other posts, but I wanted to record it here for others.

我怎样才能简单地请求用户的 GPS 和/或网络位置，并且如果他们尚未启用该服务，则提示他们这样做?

How can I simply request the user's GPS and/or Network location and, if they haven't enabled the service, prompt them to do so?

推荐答案

如果您想在按钮按下时捕获位置，请按照以下步骤操作.如果用户没有启用定位服务，这会将他们发送到设置菜单以启用它.

If you want to capture the location on a button push, here's how you'd do it. If the user does not have a location service enabled, this will send them to the settings menu to enable it.

首先，您必须在清单中添加权限android.permission.ACCESS_COARSE_LOCATION".如果需要GPS(网络定位不够灵敏)，添加权限android.permission.ACCESS_FINE_LOCATION"，将Criteria.ACCURACY_COARSE"改为Criteria.ACCURACY_FINE"

First, you must add the permission "android.permission.ACCESS_COARSE_LOCATION" to your manifest. If you need GPS (network location isn't sensitive enough), add the permission "android.permission.ACCESS_FINE_LOCATION" instead, and change the "Criteria.ACCURACY_COARSE" to "Criteria.ACCURACY_FINE"

Button gpsButton = (Button)this.findViewById(R.id.buttonGPSLocation);
gpsButton.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
        // Start loction service
        LocationManager locationManager = (LocationManager)[OUTERCLASS].this.getSystemService(Context.LOCATION_SERVICE);

        Criteria locationCritera = new Criteria();
        locationCritera.setAccuracy(Criteria.ACCURACY_COARSE);
        locationCritera.setAltitudeRequired(false);
        locationCritera.setBearingRequired(false);
        locationCritera.setCostAllowed(true);
        locationCritera.setPowerRequirement(Criteria.NO_REQUIREMENT);

        String providerName = locationManager.getBestProvider(locationCritera, true);

        if (providerName != null && locationManager.isProviderEnabled(providerName)) {
            // Provider is enabled
            locationManager.requestLocationUpdates(providerName, 20000, 100, [OUTERCLASS].this.locationListener);
        } else {
            // Provider not enabled, prompt user to enable it
            Toast.makeText([OUTERCLASS].this, R.string.please_turn_on_gps, Toast.LENGTH_LONG).show();
            Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            [OUTERCLASS].this.startActivity(myIntent);
        }
    }
});

我的外部班级设置了这个监听器

My outer class has this listener set up

private final LocationListener locationListener = new LocationListener() {

    @Override
    public void onLocationChanged(Location location) {
        [OUTERCLASS].this.gpsLocationReceived(location);
    }

    @Override
    public void onProviderDisabled(String provider) {}

    @Override
    public void onProviderEnabled(String provider) {}

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {}

};

然后，每当您想停止收听时，请调用它.您至少应该在活动的 onStop 方法期间进行此调用.

Then, whenever you want to stop listening call this. You should at least make this call during your activity's onStop method.

LocationManager locationManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
locationManager.removeUpdates(this.locationListener);

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