Question

启用GPS设置后如何刷新地图片段？我正在使用以下代码启用GPS设置。

//ask for runtime permission to showing map

private void askForPermission(String permission, Integer requestCode) {
    if (ContextCompat.checkSelfPermission(getActivity(), permission) != PackageManager.PERMISSION_GRANTED) {

        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), permission)) {
            ActivityCompat.requestPermissions(getActivity(), new String[]{permission}, requestCode);
            //getActivity().finish();
        } else {
            ActivityCompat.requestPermissions(getActivity(), new String[]{permission}, requestCode);
        }
    }
}

//check the gps is enable or not
public void statusCheck() {
     manager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);

    if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
        buildAlertMessageNoGps();
    }
}

//alert dialog to enable location permission
private void buildAlertMessageNoGps() {
    final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setMessage("Your GPS seems to be disabled, do you want to enable it?")
            .setCancelable(false)
            .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(final DialogInterface dialog, final int id) {
                    startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                }
            })
            .setNegativeButton("No", new DialogInterface.OnClickListener() {
                public void onClick(final DialogInterface dialog, final int id) {
                    dialog.cancel();

                }
            });
    final AlertDialog alert = builder.create();
    alert.show();
}

Answer 1

用于刷新地图。创建一个类似

的方法

private void refreshMap(){
if(mMap!=null){
            mMap.clear();
        }
}

Answer 2

您必须为此注册广播接收器。检查文档中的gps广播。如果有gps权限，你可以做两次。如果没有权限，你必须在onRequestPrrmissionResult中检查requestpermission方法的结果，然后在那里注册接收器。

P上。 S. Don忘记从广播中取消注册。

启用GPS设置无效后，刷新地图以显示当前位置

2 个答案: