在Android中查看AGPS设置

Question

我想检查Android中用户的辅助GPS设置。当我更改“位置准确性”设置时，ContentObserver会告诉我URI为content://settings/global/assisted_gps_enabled。我在android.provider.Settings.Global中没有看到这个常量。如何访问此设置的值？

Answer 1

尝试以下代码读取该值：

int value = 0;
ContentResolver cr = getContentResolver();

try {
    value = Settings.Global.getInt(cr,"assisted_gps_enabled");
} catch (Exception e) {
    android.util.Log.e("get agps_enabled",e.toString());
}

results on Android 8.0，它返回1（默认情况下启用）

要写入该值：

Settings.Global.putInt(cr, "assisted_gps_enabled", your-value);

此权限<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS"/>是必需的，并且此权限仅授予系统应用

Answer 2

当用户将GPS设置设为“省电”时，手机中的A-GPS将打开，并且要在您的应用中使用它，您必须添加权限：

android.permission.ACCESS_COARSE_LOCATION

在清单xml文件中，如果您正在android 6.0（Marshmellow）以下运行应用程序，则必须在运行时询问权限， 看这里： https://developer.android.com/training/permissions/requesting

现在，您将如何通过编程方式了解用户已使用AGPS或GPS，您可以为此使用LocationManager类，并分别为AGPS传递LocationManager.NETWORK_PROVIDER;或为GPS传递LocationManager.GPS_PROVIDER

对于GPS提供程序，在android设置中称为“高精度”设置，并且该权限要求为android.permission.ACCESS_FINE_LOCATION 如何使用它？ 参见此处：https://developer.android.com/guide/topics/location/strategies#java

有关更多帮助，请查看： 运行时权限：https://developer.android.com/training/permissions/requesting 用于AGPS https://en.wikipedia.org/wiki/Assisted_GPS

// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
      // Called when a new location is found by the network location provider.
      makeUseOfNewLocation(location);
    }

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

    public void onProviderEnabled(String provider) {}

    public void onProviderDisabled(String provider) {}
  };

// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);