Section Fragment: Aktuelle Seite herausfinden

package com.example.navigation;


import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.content.Context;
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.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;


public class MainActivity extends FragmentActivity {


/**
* The {@link android.support.v4.view.PagerAdapter} that will provide fragments for each of the
* sections. We use a {@link android.support.v4.app.FragmentPagerAdapter} derivative, which will
* keep every loaded fragment in memory. If this becomes too memory intensive, it may be best
* to switch to a {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;


/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the adapter that will return a fragment for each of the three primary sections
// of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());




// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);


}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}








/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to one of the primary
* sections of the app.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {


public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}


@Override
public Fragment getItem(int i) {
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, i + 1);
fragment.setArguments(args);
return fragment;
}


@Override
public int getCount() {
return 3;
}


@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0: return "Neuigkeiten";
case 1: return "Wetter";
case 2: return "Orte";
}
return null;
}
}


/**
* A dummy fragment representing a section of the app, but that simply displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
public DummySectionFragment() {


}


public static final String ARG_SECTION_NUMBER = "section_number";


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
[color=#ff0000]Integer sectionNumber = savedInstanceState.getInt(ARG_SECTION_NUMBER);
[/color]if(sectionNumber != null) {
switch(savedInstanceState.getInt("section_number")) {
case 1: 
return inflater.inflate(R.layout.neuigkeiten, null);
case 2:
return inflater.inflate(R.layout.wetter, null);
case 3:
return inflater.inflate(R.layout.orte, null);
}
}
return inflater.inflate(R.layout.neuigkeiten, null); 
}
}
}