Java tutorial
/* * Spruce * * Copyright (c) 2017 WillowTree, Inc. * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */ package com.willowtreeapps.spurceexampleapp; import android.content.Intent; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import com.willowtreeapps.spurceexampleapp.fragments.RecyclerFragment; public class RecyclerActivity extends AppCompatActivity { @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.recycler_fragment); FragmentManager fm = getSupportFragmentManager(); Fragment recyclerFragment = fm.findFragmentById(R.id.recycler_fragment); if (recyclerFragment == null) { recyclerFragment = RecyclerFragment.newInstance(); fm.beginTransaction().replace(R.id.recycler_fragment, recyclerFragment).commit(); } Toolbar toolBar = (Toolbar) findViewById(R.id.recycler_tool_bar); setSupportActionBar(toolBar); if (getSupportActionBar() != null) { getSupportActionBar().setTitle(R.string.recycler_name); getSupportActionBar().setDisplayHomeAsUpEnabled(true); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.sort_option: startActivity(new Intent(this, SpruceActivity.class).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)); break; case R.id.recycler_option: break; default: finish(); break; } return super.onOptionsItemSelected(item); } }