android - 如何检查位置是否在 API 18 及以下版本上处于高优先级

Question

试过这个:

String locationProviders = Settings.Secure.getString(getActivity().getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
Log.d(TAG_MAP, locationProviders);

输出为:gps,network

API 18 及以下的手机是否没有 HIGH_ACCURACY 优先级？

Answer 1

我假设您想知道使用 API 级别 19 中描述的 Settings.Secure.LOCATION_PROVIDERS_ALLOWED 与使用 Settings.Secure.LOCATION_MODE 有何不同，后者在 API 级别 19 中引入。

使用 Settings.Secure.LOCATION_MODE，您拥有这些值(您可能已经知道):

LOCATION_MODE_HIGH_ACCURACY, LOCATION_MODE_SENSORS_ONLY, LOCATION_MODE_BATTERY_SAVING, or LOCATION_MODE_OFF

您可以通过这种方式将这些值映射到 Settings.Secure.LOCATION_PROVIDERS_ALLOWED:

LOCATION_MODE_HIGH_ACCURACY : "gps,network"

LOCATION_MODE_SENSORS_ONLY : "gps"

LOCATION_MODE_BATTERY_SAVING : "network"

LOCATION_MODE_OFF : ""

请注意，在代码中，最好引用常量 LocationManager.GPS_PROVIDER 和 LocationManager.NETWORK_PROVIDER 而不仅仅是“gps”和“network”。

使用 this answer作为引用，你可以这样做:

public static int getLocationMode(Context context) {
    int locationMode = 0;
    String locationProviders;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        try {
            locationMode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE);

        } catch (SettingNotFoundException e) {
            e.printStackTrace();
        }


    } else {
        locationProviders = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);

        if (TextUtils.isEmpty(locationProviders)) {
          locationMode = Settings.Secure.LOCATION_MODE_OFF;
        }
        else if (locationProviders.contains(LocationManager.GPS_PROVIDER) && locationProviders.contains(LocationManager.NETWORK_PROVIDER)) {
          locationMode = Settings.Secure.LOCATION_MODE_HIGH_ACCURACY;
        }
        else if (locationProviders.contains(LocationManager.GPS_PROVIDER)) {
           locationMode = Settings.Secure.LOCATION_MODE_SENSORS_ONLY;
        }
        else if (locationProviders.contains(LocationManager.NETWORK_PROVIDER)) {
           locationMode = Settings.Secure.LOCATION_MODE_BATTERY_SAVING;
        }

    }

    return locationMode;
}