Java tutorial
/* * Copyright 2013 Thomas Hoffmann * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ngoc.com.pedometer.ui; import android.app.AlertDialog; import android.app.Fragment; import android.app.FragmentTransaction; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageManager.NameNotFoundException; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v7.app.AppCompatActivity; import android.text.method.LinkMovementMethod; import android.view.MenuItem; import android.widget.TextView; import ngoc.com.pedometer.R; import ngoc.com.pedometer.SensorListener; public class Activity_Main extends AppCompatActivity { @Override protected void onCreate(final Bundle b) { super.onCreate(b); startService(new Intent(this, SensorListener.class)); if (b == null) { // Create new fragment and transaction Fragment newFragment = new Fragment_Overview(); FragmentTransaction transaction = getFragmentManager().beginTransaction(); // Replace whatever is in the fragment_container view with this // fragment, // and add the transaction to the back stack transaction.replace(android.R.id.content, newFragment); // Commit the transaction transaction.commit(); } } public boolean optionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case android.R.id.home: getFragmentManager().popBackStackImmediate(); break; case R.id.action_settings: getFragmentManager().beginTransaction().replace(android.R.id.content, new Fragment_Settings()) .addToBackStack(null).commit(); break; case R.id.action_leaderboard: case R.id.action_achievements: AlertDialog.Builder builder2 = new AlertDialog.Builder(this); builder2.setTitle("Google services required"); builder2.setMessage("This feature is not available on the F-Droid version of the app"); builder2.setNegativeButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); builder2.create().show(); break; case R.id.action_faq: startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://j4velin.de/faq/index.php?app=pm")) .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)); break; case R.id.action_about: AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(R.string.about); TextView tv = new TextView(this); tv.setPadding(10, 10, 10, 10); tv.setText(R.string.about_text_links); try { tv.append(getString(R.string.about_app_version, getPackageManager().getPackageInfo(getPackageName(), 0).versionName)); } catch (NameNotFoundException e1) { // should not happen as the app is definitely installed when // seeing the dialog e1.printStackTrace(); } tv.setMovementMethod(LinkMovementMethod.getInstance()); builder.setView(tv); builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(final DialogInterface dialog, int which) { dialog.dismiss(); } }); builder.create().show(); break; } return true; } }