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 es.ubiqua.atractivas; 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.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.TextView; import java.util.ArrayList; import java.util.List; import es.ubiqua.atractivas.database.Imagen; import es.ubiqua.atractivas.database.Rss; import es.ubiqua.atractivas.database.RssDataSource; import org.skilladev.utils.share.ShareIt; import org.skilladev.utils.string.StringUtils; /** * Demonstrates a "screen-slide" animation using a {@link android.support.v4.view.ViewPager}. Because {@link android.support.v4.view.ViewPager} * automatically plays such an animation when calling {@link android.support.v4.view.ViewPager#setCurrentItem(int)}, there * isn't any animation-specific code in this sample. * * <p>This sample shows a "next" button that advances the user to the next step in a wizard, * animating the current screen out (to the left) and the next screen in (from the right). The * reverse animation is played when the user presses the "previous" button.</p> * * @see es.ubiqua.atractivas.GaleryPageFragment */ public class GaleryActivity extends ActionBarActivity { /** * The number of pages (wizard steps) to show in this demo. */ private static int NUM_PAGES = 5; /** * The pager widget, which handles animation and allows swiping horizontally to access previous * and next wizard steps. */ private ViewPager mPager; private android.widget.ShareActionProvider provider; /** * The List of objects for the Adapter */ public List<Imagen> m_parts = new ArrayList<Imagen>(); public Rss rss; /** * The pager adapter, which provides the pages to the view pager widget. */ private PagerAdapter mPagerAdapter; private int previousState, currentState; private boolean fromSearch = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_galery); fromSearch = this.getIntent().getBooleanExtra("fromSearch", false); ImageButton left = (ImageButton) findViewById(R.id.totheleft); left.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { int siguiente = mPager.getCurrentItem() - 1; if (siguiente < 0) siguiente = mPagerAdapter.getCount() - 1; mPager.setCurrentItem(siguiente); } }); ImageButton right = (ImageButton) findViewById(R.id.totheright); right.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { int siguiente = mPager.getCurrentItem() + 1; if (siguiente >= mPagerAdapter.getCount()) siguiente = 0; mPager.setCurrentItem(siguiente); } }); RssDataSource RssDS = new RssDataSource(this); try { RssDS.open(); rss = RssDS.getRss(this.getIntent().getLongExtra("rssid", 0)); m_parts = RssDS.getRssImages(rss); } catch (Exception e) { e.printStackTrace(); } finally { RssDS.close(); } // 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. TextView textView = (TextView) findViewById(R.id.paginador); textView.setText(String.valueOf(position + 1) + " de " + String.valueOf(mPagerAdapter.getCount())); invalidateOptionsMenu(); } @Override public void onPageScrollStateChanged(int state) { //Comment this code if doesn't need circular pageviewer int currentPage = mPager.getCurrentItem(); if (currentPage == mPagerAdapter.getCount() - 1 || currentPage == 0) { previousState = currentState; currentState = state; if (previousState == 1 && currentState == 0) { mPager.setCurrentItem(currentPage == 0 ? mPagerAdapter.getCount() - 1 : 0); } } } }); TextView textView = (TextView) findViewById(R.id.paginador); textView.setText(String.valueOf(1) + " de " + String.valueOf(mPagerAdapter.getCount())); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.searchshare, menu); ActionBar actionBar = getSupportActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); actionBar.setDisplayShowTitleEnabled(true); Imagen img = m_parts.get(mPager.getCurrentItem()); ApplicationApp.getInstance().sendAnalytics( "Galera/" + StringUtils.makeSlug(rss.getTitle()) + "/" + StringUtils.makeFileSlug(img.getUrl())); 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, MainActivity.class ) ); onBackPressed(); return true; case R.id.sharemenu: new ShareIt(this, rss.getTitle(), rss.getLink()).share(); invalidateOptionsMenu(); return true; case R.id.searchmenu: if (fromSearch) { onBackPressed(); return true; } finish(); ApplicationApp.launchSearch = true; Intent i = new Intent(this, MainActivity.class); i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT); // i.setAction(Intent.ACTION_MAIN); // i.addCategory(Intent.CATEGORY_LAUNCHER); startActivity(i); return true; } return super.onOptionsItemSelected(item); } @Override public void onBackPressed() { finish(); // super.onBackPressed(); } /** * A simple pager adapter that represents 5 {@link es.ubiqua.atractivas.GaleryPageFragment} objects, in * sequence. */ private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter { public ScreenSlidePagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { return GaleryPageFragment.create(position); } @Override public int getCount() { return m_parts.size(); } } public void showButtons() { LinearLayout botonera = (LinearLayout) findViewById(R.id.botonera); botonera.setVisibility(View.VISIBLE); } public void hideButtons() { LinearLayout botonera = (LinearLayout) findViewById(R.id.botonera); botonera.setVisibility(View.GONE); } }