Android 6.0 上需要启用蓝牙低功耗扫描的位置

<uses-permission Android:name="Android.permission.ACCESS_FINE_LOCATION" />

Java
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
boolean isLocationEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!isLocationEnabled) {
    // 提示用户打开定位服务
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("定位服务未启用");
    builder.setMessage("请打开定位服务以启用蓝牙低功耗扫描功能。");
    builder.setPositiveButton("去设置", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            // 打开定位服务设置页面
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(intent);
        }
    });
    builder.setNegativeButton("取消", null);
    builder.show();
}

Java
private static final int REQUEST_LOCATION_PERMISSION = 1;
private void requestLocationPermission() {
    ActivityCompat.requestPermissions(this,
            new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
            REQUEST_LOCATION_PERMISSION);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == REQUEST_LOCATION_PERMISSION) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // 定位权限已授予
        } else {
            // 定位权限被拒绝
        }
    }
}