Java tutorial
/*Copyright (C) 2017 M. Steve Todd mstevetodd@gmail.com This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Derived from the samples for AppIntro at https://github.com/paolorotolo/AppIntro */ package jmri.enginedriver; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.Bundle; import android.provider.Settings; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.Button; import android.widget.Spinner; import android.widget.TextView; import jmri.enginedriver.util.PermissionsHelper; public class intro_write_settings extends Fragment { @SuppressWarnings("ConstantConditions") @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { Log.d("Engine_Driver", "intro_write_settings"); super.onActivityCreated(savedInstanceState); Button settingsButton = getView().findViewById(R.id.intro_write_settings_launch); settingsButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); intent.setAction(Settings.ACTION_MANAGE_WRITE_SETTINGS); Uri uri = Uri.fromParts("package", getActivity().getApplicationContext().getPackageName(), null); intent.setData(uri); getActivity().startActivity(intent); } }); } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { return inflater.inflate(R.layout.intro_write_settings, container, false); } }