Android Open Source - fragments Main Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.example.frag7demo;
//from w  w w  .  j a  va  2 s  . c  o  m

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MainActivity extends FragmentActivity {

  PageFragment one =null, two =null, three=null, four =null, five = null;
  ViewPager viewPager,viewPager1, viewPager2;
  
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
      FragmentManager fragmentManager = getSupportFragmentManager();
      if (savedInstanceState != null) {
        one = (PageFragment) fragmentManager.getFragment(savedInstanceState, "ONE");
        two = (PageFragment) fragmentManager.getFragment(savedInstanceState, "TWO");
        three = (PageFragment) fragmentManager.getFragment(savedInstanceState, "THREE");
        four = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FOUR");
        five = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FIVE");
        //since survived, need to clean up or I can't add them to the pagers adapter again.
        FragmentTransaction remove = fragmentManager.beginTransaction();
        remove.remove(one);
        remove.remove(two);
        remove.remove(three);
        remove.remove(four);
        remove.remove(five);
        if (!remove.isEmpty()) {
            remove.commit();
            fragmentManager.executePendingTransactions();
        }
      } else {
        one = PageFragment.create(1);
        two = PageFragment.create(2);
        three = PageFragment.create(3);
        four = PageFragment.create(4);
        five = PageFragment.create(5);
      }
    
    viewPager = (ViewPager) findViewById(R.id.pager);
    if (viewPager != null) {
      //in portrait mode
      viewPager.setAdapter(new ThreeFragmentPagerAdapter(5));
    } else {
      //in landscape mode
      viewPager1 = (ViewPager) findViewById(R.id.pagerleft);
      viewPager1.setAdapter(new ThreeFragmentPagerAdapter(2));
      viewPager2 = (ViewPager) findViewById(R.id.pagerright);
      viewPager2.setAdapter(new ThreeFragmentPagerAdapter(3));
      
    }
    
  }
  
  
  public class ThreeFragmentPagerAdapter extends FragmentPagerAdapter {
    int PAGE_COUNT;
    
    public ThreeFragmentPagerAdapter(int count) {
      super(getSupportFragmentManager());
      PAGE_COUNT = count;
    }

    @Override
    public Fragment getItem(int position) {
      if (PAGE_COUNT == 3) {
        position = position+ 2;
      }
      switch (position) {
      case 0: return one;
      case 1: return two;
      case 2: return three;
      case 3: return four;
      case 4: return five;
      default: return null;

      }
    }

    @Override
    public int getCount() {

      return PAGE_COUNT;
    }
  
    //getPageTitle required for the PageStripe to work and have a value.
        @Override
        public CharSequence getPageTitle(int position) {
              
          //return String.valueOf(position);  //returns string of position for title
          return "Page "+ String.valueOf(position +1);
          
        }
  }
  
  @Override protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    
  
      FragmentManager fragmentManager = getSupportFragmentManager();
      fragmentManager.putFragment(outState, "ONE", one);
      fragmentManager.putFragment(outState,"TWO", two);
      fragmentManager.putFragment(outState,"THREE", three);
      fragmentManager.putFragment(outState,"FOUR", four);
      fragmentManager.putFragment(outState,"FIVE", five);

  }
  
  
  public static class PageFragment extends Fragment {
    public static final String ARG_PAGE = "ARG_PAGE";

    private int mPage;

    public static PageFragment create(int page) {
      Bundle args = new Bundle();
      args.putInt(ARG_PAGE, page);
      PageFragment fragment = new PageFragment();
      fragment.setArguments(args);
      return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      mPage = getArguments().getInt(ARG_PAGE);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
      View view = inflater.inflate(R.layout.fragment_page, container, false);
      TextView textView = (TextView) view;
      textView.setText("Fragment #" + mPage);
      return view;
    }
  }
}
Java Source Code List
