Java tutorial
/* * Copyright 2012 The Android Open Source Project * * 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 com.team.agita.langeo; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.app.NavUtils; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import com.team.agita.langeo.map.ActivityMaps; public class ActivitySlideShow extends AppCompatActivity { /** * The number of pages (wizard steps) to show in this demo. */ private static final int NUM_PAGES = 3; private static final String LOG = "SlideShowActivity"; private static final String MAP_START = "com.team.agita.langeo.RUN_MAP"; private static final String SIGNIN_START = "com.team.agita.langeo.RUN_SIGNIN"; /** * The pager widget, which handles animation and allows swiping horizontally to access previous * and next wizard steps. */ private ViewPager mPager; /** * The pager adapter, which provides the pages to the view pager widget. */ private PagerAdapter mPagerAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_screen_slide); Intent intent = getIntent(); Log.d(LOG, "onCreate"); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); // Instantiate a ViewPager and a PagerAdapter. mPager = (ViewPager) findViewById(R.id.pager); mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager()); mPager.setAdapter(mPagerAdapter); mPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { // When changing pages, reset the action bar actions since they are dependent // on which page is currently active. An alternative approach is to have each // fragment expose actions itself (rather than the activity exposing actions), // but for simplicity, the activity provides the actions in this sample. invalidateOptionsMenu(); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.activity_screen_slide, menu); menu.findItem(R.id.action_previous).setEnabled(mPager.getCurrentItem() >= 0); // Add either a "next" or "finish" button to the action bar, depending on which page // is currently selected. MenuItem item = menu.add(Menu.NONE, R.id.action_next, Menu.NONE, (mPager.getCurrentItem() == mPagerAdapter.getCount() - 1) ? R.string.action_finish : R.string.action_next); item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: // Navigate "up" the demo structure to the launchpad activity. // See http://developer.android.com/design/patterns/navigation.html for more. NavUtils.navigateUpTo(this, new Intent(this, ActivitySignin.class)); return true; case R.id.action_previous: // Go to signin step. if (mPager.getCurrentItem() == 0) { Intent intent = new Intent(this, ActivitySignin.class); intent.putExtra(SIGNIN_START, true); startActivity(intent); return true; } // Go to the previous step in the wizard. If there is no previous step, // setCurrentItem will do nothing. Log.d(LOG, "NO" + mPager.getCurrentItem()); mPager.setCurrentItem(mPager.getCurrentItem() - 1); return true; case R.id.action_next: // Advance to the next step in the wizard. If there is no next step, setCurrentItem // will do nothing. Log.d(LOG, "" + mPager.getCurrentItem()); if (mPager.getCurrentItem() == mPagerAdapter.getCount() - 1) { LocalUser.getInstance().setShowSlides(false); LocalUser.updateStorages(this); Intent intent = new Intent(this, ActivityMaps.class); intent.putExtra(MAP_START, true); startActivity(intent); return true; } else { Log.d(LOG, "NO" + mPager.getCurrentItem()); mPager.setCurrentItem(mPager.getCurrentItem() + 1); return true; } } return super.onOptionsItemSelected(item); } /** * A simple pager adapter that represents 5 {@link FragmentSlideShow} objects, in * sequence. */ private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter { public ScreenSlidePagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { return FragmentSlideShow.create(position); } @Override public int getCount() { return NUM_PAGES; } } }