Flexible UI kombiniert mit Swipe

package com.example.paul_io;


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 java.util.Locale;


public class MainActivity extends FragmentActivity implements IoDeviceFragment.OnIoDeviceSelectedListener {


  SectionsPagerAdapter[] mSectionsPagerAdapter;
  ViewPager mViewPager;
  Fragment fragment;


  /**
   * Called when the activity is first created.
   */
  @Override
  protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.sites);


	mSectionsPagerAdapter = new SectionsPagerAdapter[DataCollector.IoDevice.length];


	// Check whether the activity is using the layout version with
	// the fragment_container FrameLayout. If so, we must add the first fragment
	if (findViewById(R.id.fragment_container) != null) {


  	// However, if we're being restored from a previous state,
  	// then we don't need to do anything and should return or else
  	// we could end up with overlapping fragments.
  	if (savedInstanceState != null) {
    	return;
  	}


  	// Create an instance of ExampleFragment
  	IoDeviceFragment firstFragment = new IoDeviceFragment();


  	// In case this activity was started with special instructions from an Intent,
  	// pass the Intent's extras to the fragment as arguments
  	firstFragment.setArguments(getIntent().getExtras());


  	// Add the fragment to the 'fragment_container' FrameLayout
  	getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, firstFragment).commit();
	}
  }


  @Override
  public void onIoDeviceSelected(int position) {
	// The user selected the headline of an article from the HeadlinesFragment


	// Capture the article fragment from the activity layout
	SiteFragment siteFrag = (SiteFragment) getSupportFragmentManager().findFragmentById(R.id.site_fragment);


	if (siteFrag != null) {
  	// If site frag is available, we're in two-pane layout...


  	// Call a method in the SiteFragment to update its content
  	makeSectionsPagerAdapter(position);
  	siteFrag.updateSiteView(position);


	} else {
  	// If the frag is not available, we're in the one-pane layout and must swap frags...


  	// Create fragment and give it an argument for the selected article
  	SiteFragment newFragment = new SiteFragment();
  	Bundle args = new Bundle();
  	args.putInt(SiteFragment.ARG_POSITION, position);
  	newFragment.setArguments(args);
  	FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();


  	// Replace whatever is in the fragment_container view with this fragment,
  	// and add the transaction to the back stack so the user can navigate back
  	transaction.replace(R.id.fragment_container, newFragment);
  	transaction.addToBackStack(null);


  	// Commit the transaction
  	transaction.commit();
	}
  }


//	#########################################################################################




  /**
   * A {@link android.support.v4.app.FragmentPagerAdapter} that returns a fragment corresponding to
   * one of the sections/tabs/pages.
   */
  public class SectionsPagerAdapter extends FragmentPagerAdapter {


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


	@Override
	public Fragment getItem(int position) {




  	switch (position) {
    	case 0:
      	fragment = new EingangSection();
      	break;
    	case 1:
      	fragment = new AusgangSection();
      	break;
    	case 2:
      	fragment = new SignalSection();
      	break;
    	default:
      	fragment = new EingangSection();
  	}


  	return fragment;




  	// getItem is called to instantiate the fragment for the given page.
  	// Return a PlaceholderFragment (defined as a static inner class below).
//        	return PlaceholderFragment.newInstance(position + 1);
	}


	@Override
	public int getCount() {
  	// Show 3 total pages.
  	return 3;
	}


	@Override
	public CharSequence getPageTitle(int position) {
  	Locale l = Locale.getDefault();
  	switch (position) {
    	case 0:
      	return getString(R.string.title_section1).toUpperCase(l);
    	case 1:
      	return getString(R.string.title_section2).toUpperCase(l);
    	case 2:
      	return getString(R.string.title_section3).toUpperCase(l);
  	}
  	return null;
	}
  }




  // ####################	                      	####################
  // ####################   Eingang Section Fragment  ####################
  // ####################	                      	####################


  public static class EingangSection extends Fragment {
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  	View rootView = inflater.inflate(R.layout.eingang_section, container, false);
  	return rootView;
	}
  }


  // ####################	                      	####################
  // ####################   Ausgang Section Fragment  ####################
  // ####################	                      	####################


  public static class AusgangSection extends Fragment {
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  	View rootView = inflater.inflate(R.layout.ausgang_section, container, false);
  	return rootView;
	}
  }


  // ####################	                      	####################
  // ####################   Signale Section Fragment  ####################
  // ####################	                      	####################


  public static class SignalSection extends Fragment {
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  	View rootView = inflater.inflate(R.layout.signal_section, container, false);
  	return rootView;
	}
  }


  public void makeSectionsPagerAdapter(int position) {
	// Create the adapter that will return a fragment for each of the three
	// primary sections of the activity.


//	Intent intent = new Intent(this, SwipeActivity.class);
//	startActivity(intent);


	mSectionsPagerAdapter[position] = new SectionsPagerAdapter(getSupportFragmentManager());
	System.out.println(" ######################  Position:  " + position);
	// Set up the ViewPager with the sections adapter.
	mViewPager = null;
	mViewPager = (ViewPager) findViewById(R.id.pager);
	mViewPager.setAdapter(mSectionsPagerAdapter[position]);


  }
}

public class SectionsPagerAdapter extends FragmentPagerAdapter {


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


	@Override
	public Fragment getItem(int position) {




  	switch (position) {
    	case 0:
      	fragment = new EingangSection();
      	break;
    	case 1:
      	fragment = new AusgangSection();
      	break;
    	case 2:
      	fragment = new SignalSection();
      	break;
    	default:
      	fragment = new EingangSection();
  	}


  	return fragment;




  	// getItem is called to instantiate the fragment for the given page.
  	// Return a PlaceholderFragment (defined as a static inner class below).
//        	return PlaceholderFragment.newInstance(position + 1);
	}


	@Override
	public int getCount() {
  	// Show 3 total pages.
  	return 3;
	}


	@Override
	public CharSequence getPageTitle(int position) {
  	Locale l = Locale.getDefault();
  	switch (position) {
    	case 0:
      	return getString(R.string.title_section1).toUpperCase(l);
    	case 1:
      	return getString(R.string.title_section2).toUpperCase(l);
    	case 2:
      	return getString(R.string.title_section3).toUpperCase(l);
  	}
  	return null;
	}
  }

public void makeSectionsPagerAdapter() {
	// Create the adapter that will return a fragment for each of the three
	// primary sections of the activity.


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

02-24 12:46:27.392	2713-2713/com.example.paul_io I/Process﹕ Sending signal. PID: 2713 SIG: 9
02-24 12:59:48.182	2764-2764/com.example.paul_io D/AndroidRuntime﹕ Shutting down VM
02-24 12:59:48.182	2764-2764/com.example.paul_io W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4ca9b20)
02-24 12:59:48.186	2764-2764/com.example.paul_io E/AndroidRuntime﹕ FATAL EXCEPTION: main
	Process: com.example.paul_io, PID: 2764
	java.lang.NullPointerException
        	at com.example.paul_io.MainActivity.makeSectionsPagerAdapter(MainActivity.java:99)
        	at com.example.paul_io.MainActivity.onIoDeviceSelected(MainActivity.java:84)
        	at com.example.paul_io.IoDeviceFragment.onListItemClick(IoDeviceFragment.java:65)
        	at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58)
        	at android.widget.AdapterView.performItemClick(AdapterView.java:299)
        	at android.widget.AbsListView.performItemClick(AbsListView.java:1113)
        	at android.widget.AbsListView$PerformClick.run(AbsListView.java:2911)
        	at android.widget.AbsListView$3.run(AbsListView.java:3645)
        	at android.os.Handler.handleCallback(Handler.java:733)
        	at android.os.Handler.dispatchMessage(Handler.java:95)
        	at android.os.Looper.loop(Looper.java:136)
        	at android.app.ActivityThread.main(ActivityThread.java:5001)
        	at java.lang.reflect.Method.invokeNative(Native Method)
        	at java.lang.reflect.Method.invoke(Method.java:515)
        	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
        	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
        	at dalvik.system.NativeStart.main(Native Method)

@Override
  public void onIoDeviceSelected(int position) {
	// The user selected the headline of an article from the HeadlinesFragment


	// Capture the article fragment from the activity layout
	SiteFragment siteFrag = (SiteFragment) getSupportFragmentManager().findFragmentById(R.id.site_fragment);


	if (siteFrag != null) {
  	// If site frag is available, we're in two-pane layout...


  	// Call a method in the SiteFragment to update its content
  	makeSectionsPagerAdapter();
  	siteFrag.updateSiteView(position);


	} else {
  	// If the frag is not available, we're in the one-pane layout and must swap frags...


  	// Create fragment and give it an argument for the selected article
  	SiteFragment newFragment = new SiteFragment();
  	Bundle args = new Bundle();
  	args.putInt(SiteFragment.ARG_POSITION, position);
  	newFragment.setArguments(args);
  	FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();


  	// Replace whatever is in the fragment_container view with this fragment,
  	// and add the transaction to the back stack so the user can navigate back
  	transaction.replace(R.id.fragment_container, newFragment);
  	transaction.addToBackStack(null);


  	// Commit the transaction
  	transaction.commit();
  	makeSectionsPagerAdapter();
	}
  }

public class SiteFragment extends Fragment {
  final static String ARG_POSITION = "position";
  int mCurrentPosition = -1;




  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
	// If activity recreated (such as from screen rotate), restore
	// the previous article selection set by onSaveInstanceState().
	// This is primarily necessary when in the two-pane layout.
	if (savedInstanceState != null) {
  	mCurrentPosition = savedInstanceState.getInt(ARG_POSITION);
	}


	// Inflate the layout for this fragment
	return inflater.inflate(R.layout.site_view, container, false);
  }
.
.
.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            	android:layout_width="match_parent"
            	android:layout_height="match_parent"
            	android:padding="16dp"
            	android:textSize="18sp"
            	android:orientation="vertical"
            	android:weightSum="100"
	>


	<android.support.v4.view.ViewPager
    	android:id="@+id/pager"
    	android:layout_width="match_parent"
    	android:layout_height="75dp"
    	android:layout_weight="75"
    	android:layout_alignParentTop="true"
    	android:layout_alignParentLeft="true"
    	android:layout_alignParentStart="true"
    	>


    	<android.support.v4.view.PagerTitleStrip
        	android:id="@+id/pager_title_strip"
        	android:layout_width="match_parent"
        	android:layout_height="35dp"
        	android:layout_gravity="top"
        	android:background="#353F3E"
        	android:paddingBottom="8dp"
        	android:paddingTop="5dp"
        	android:textColor="#fff"
        	/>
	</android.support.v4.view.ViewPager>




	<TextView
    	android:id="@+id/site"
    	android:layout_width="match_parent"
    	android:layout_height="25dp"
    	android:layout_weight="25"
    	android:layout_below="@+id/pager"
    	android:textSize="18sp"
    	android:padding="5dp"
    	/>
</LinearLayout>

public class IoDeviceFragment extends ListFragment {
.
.
  @Override
  public void onListItemClick(ListView l, View v, int position, long id) {
	// Notify the parent activity of selected item
	mCallback.onIoDeviceSelected(position);


	// Set the item as checked to be highlighted when in two-pane layout
	getListView().setItemChecked(position, true);
  }
}

public class ListFragment extends Fragment {
.
.
.
	/**
 	* Get the ListAdapter associated with this activity's ListView.
 	*/
	public ListAdapter getListAdapter() {
    	return mAdapter;
	}


	private void ensureList() {
    	if (mList != null) {
        	return;
    	}
    	View root = getView();
    	if (root == null) {
        	throw new IllegalStateException("Content view not yet created");
    	}
.
.
.