Android Open Source - eclipse-ui-tips Guidelines Pager Activity

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License

The source code is released under:

Eclipse Public License -v 1.0 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUT...

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Java Source Code

/*******************************************************************************
 * Copyright (c) 2012 Kaloyan Raev./* w  ww .  j  a v a  2  s.c o  m*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Kaloyan Raev - initial implementation
 *******************************************************************************/
package name.raev.kaloyan.android.eclipseuitips;

import name.raev.kaloyan.android.eclipseuitips.model.Guideline;
import name.raev.kaloyan.android.eclipseuitips.model.Subcategory;
import android.os.Bundle;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;

import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;

public class GuidelinesPagerActivity extends UpNavigationActivity implements OnPageChangeListener {
  
  private ViewPager mPager;
  private Guideline mHighlightedGuideline;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.guidelines_pager);
    
        // get the index of the guideline to be displayed
        int index = getIntent().getIntExtra(Guideline.EXTRA_INDEX, 0);
        Guideline guideline = Guideline.values()[index];
        
        // check if the guideline shall be highlighted
        mHighlightedGuideline = getIntent().getBooleanExtra(Guideline.EXTRA_HIGHLIGHTED, false) ? guideline : null;

        // initialize the pager
    mPager = (ViewPager) findViewById(R.id.guidelines_pager);
    mPager.setOnPageChangeListener(this);
        mPager.setAdapter(new GuidelinesPageAdapter());
        
        // set the initial page to the guideline's category
        scrollTo(guideline);
  }
  
  private void scrollTo(Guideline guideline) {
    int subcategoryIndex = guideline.subcategory().ordinal();
        mPager.setCurrentItem(subcategoryIndex);
        setActivityTitle(subcategoryIndex);
        
        // notify all fragments that the highlight has changed
        GuidelinesFragment.highlightChanged(guideline);
  }
  
  private void setActivityTitle(int subcategoryIndex) {
    Subcategory subcategory = Subcategory.values()[subcategoryIndex];
        setTitle(getString(subcategory.title()));
  }
  
    @Override
  protected Class<?> getUpLevelActivity() {
      return (mHighlightedGuideline == null) ?  // check if there is a highlighted guideline
          CategoriesActivity.class :       // No - return to the list of categories
          super.getUpLevelActivity();     // Yes - return to the welcome screen
  }
  
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    }

  @Override
    public void onPageSelected(int position) {
      // if page changes, then change the activity title
      setActivityTitle(position);
    }

    @Override
    public void onPageScrollStateChanged(int state) {
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getSupportMenuInflater();
        inflater.inflate(R.menu.guidelines_pager_activity, menu);
        return true;
    }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
          case R.id.menu_random:
            // draw a random guideline to show in the guidelines list
          mHighlightedGuideline = Guideline.random();
          // scroll the pager
          scrollTo(mHighlightedGuideline);
              return true;
          default:
              return super.onOptionsItemSelected(item);
    }
  }
  
  public Guideline getHighlightedGuildeine() {
    return mHighlightedGuideline;
  }

  private class GuidelinesPageAdapter extends FragmentPagerAdapter {
    
    public GuidelinesPageAdapter() {
       super(GuidelinesPagerActivity.this.getSupportFragmentManager());
    }

    @Override
    public int getCount() {
      return Subcategory.values().length;
    }
    
    @Override
    public GuidelinesFragment getItem(int position) {
      Subcategory subcategory = Subcategory.values()[position];
      return GuidelinesFragment.newInstance(subcategory);
    }
    
  }

}

Java Source Code List