samples/Support4Demos/src/com/example/android/supportv4/app/FragmentLayoutSupport.java - platform/development - Git at Google

 /*
  * Copyright (C) 2010 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 com.example.android.supportv4.app;

 import com.example.android.supportv4.Shakespeare;
 import com.example.android.supportv4.R;

 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v4.app.ListFragment;

 import android.content.Intent;
 import android.content.res.Configuration;
 import android.os.Bundle;
 import android.util.TypedValue;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.ScrollView;
 import android.widget.TextView;

 /**
  * Demonstration of using fragments to implement different activity layouts.
  * This sample provides a different layout (and activity flow) when run in
  * landscape.
  */
 public class FragmentLayoutSupport extends FragmentActivity {

 //BEGIN_INCLUDE(main)
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         setContentView(R.layout.fragment_layout_support);
     }
 //END_INCLUDE(main)

     /**
      * This is a secondary activity, to show what the user has selected
      * when the screen is not large enough to show it all in one activity.
      */
 //BEGIN_INCLUDE(details_activity)
     public static class DetailsActivity extends FragmentActivity {

         @Override
         protected void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);

             if (getResources().getConfiguration().orientation
                     == Configuration.ORIENTATION_LANDSCAPE) {
                 // If the screen is now in landscape mode, we can show the
                 // dialog in-line with the list so we don't need this activity.
                 finish();
                 return;
             }

             if (savedInstanceState == null) {
                 // During initial setup, plug in the details fragment.
                 DetailsFragment details = new DetailsFragment();
                 details.setArguments(getIntent().getExtras());
                 getSupportFragmentManager().beginTransaction().add(
                         android.R.id.content, details).commit();
             }
         }
     }
 //END_INCLUDE(details_activity)

     /**
      * This is the "top-level" fragment, showing a list of items that the
      * user can pick.  Upon picking an item, it takes care of displaying the
      * data to the user as appropriate based on the currrent UI layout.
      */
 //BEGIN_INCLUDE(titles)
     public static class TitlesFragment extends ListFragment {
         boolean mDualPane;
         int mCurCheckPosition = 0;

         @Override
         public void onActivityCreated(Bundle savedInstanceState) {
             super.onActivityCreated(savedInstanceState);

             // Populate list with our static array of titles.
             setListAdapter(new ArrayAdapter<String>(getActivity(),
                     R.layout.simple_list_item_checkable_1,
                     android.R.id.text1, Shakespeare.TITLES));

             // Check to see if we have a frame in which to embed the details
             // fragment directly in the containing UI.
             View detailsFrame = getActivity().findViewById(R.id.details);
             mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;

             if (savedInstanceState != null) {
                 // Restore last state for checked position.
                 mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
             }

             if (mDualPane) {
                 // In dual-pane mode, the list view highlights the selected item.
                 getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
                 // Make sure our UI is in the correct state.
                 showDetails(mCurCheckPosition);
             }
         }

         @Override
         public void onSaveInstanceState(Bundle outState) {
             super.onSaveInstanceState(outState);
             outState.putInt("curChoice", mCurCheckPosition);
         }

         @Override
         public void onListItemClick(ListView l, View v, int position, long id) {
             showDetails(position);
         }

         /**
          * Helper function to show the details of a selected item, either by
          * displaying a fragment in-place in the current UI, or starting a
          * whole new activity in which it is displayed.
          */
         void showDetails(int index) {
             mCurCheckPosition = index;

             if (mDualPane) {
                 // We can display everything in-place with fragments, so update
                 // the list to highlight the selected item and show the data.
                 getListView().setItemChecked(index, true);

                 // Check what fragment is currently shown, replace if needed.
                 DetailsFragment details = (DetailsFragment)
                         getFragmentManager().findFragmentById(R.id.details);
                 if (details == null || details.getShownIndex() != index) {
                     // Make new fragment to show this selection.
                     details = DetailsFragment.newInstance(index);

                     // Execute a transaction, replacing any existing fragment
                     // with this one inside the frame.
                     getFragmentManager().beginTransaction()
                             .replace(R.id.details, details)
                             .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
                             .commit();
                 }

             } else {
                 // Otherwise we need to launch a new activity to display
                 // the dialog fragment with selected text.
                 Intent intent = new Intent();
                 intent.setClass(getActivity(), DetailsActivity.class);
                 intent.putExtra("index", index);
                 startActivity(intent);
             }
         }
     }
 //END_INCLUDE(titles)

     /**
      * This is the secondary fragment, displaying the details of a particular
      * item.
      */
 //BEGIN_INCLUDE(details)
     public static class DetailsFragment extends Fragment {
         /**
          * Create a new instance of DetailsFragment, initialized to
          * show the text at 'index'.
          */
         public static DetailsFragment newInstance(int index) {
             DetailsFragment f = new DetailsFragment();

             // Supply index input as an argument.
             Bundle args = new Bundle();
             args.putInt("index", index);
             f.setArguments(args);

             return f;
         }

         public int getShownIndex() {
             return getArguments().getInt("index", 0);
         }

         @Override
         public View onCreateView(LayoutInflater inflater, ViewGroup container,
                 Bundle savedInstanceState) {
             if (container == null) {
                 // We have different layouts, and in one of them this
                 // fragment's containing frame doesn't exist.  The fragment
                 // may still be created from its saved state, but there is
                 // no reason to try to create its view hierarchy because it
                 // won't be displayed.  Note this is not needed -- we could
                 // just run the code below, where we would create and return
                 // the view hierarchy; it would just never be used.
                 return null;
             }

             ScrollView scroller = new ScrollView(getActivity());
             TextView text = new TextView(getActivity());
             int padding = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                     4, getActivity().getResources().getDisplayMetrics());
             text.setPadding(padding, padding, padding, padding);
             scroller.addView(text);
             text.setText(Shakespeare.DIALOGUE[getShownIndex()]);
             return scroller;
         }
     }
 //END_INCLUDE(details)
 }
	/*
	* Copyright (C) 2010 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 com.example.android.supportv4.app;

	import com.example.android.supportv4.Shakespeare;
	import com.example.android.supportv4.R;

	import android.support.v4.app.Fragment;
	import android.support.v4.app.FragmentActivity;
	import android.support.v4.app.FragmentTransaction;
	import android.support.v4.app.ListFragment;

	import android.content.Intent;
	import android.content.res.Configuration;
	import android.os.Bundle;
	import android.util.TypedValue;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.ArrayAdapter;
	import android.widget.ListView;
	import android.widget.ScrollView;
	import android.widget.TextView;

	/**
	* Demonstration of using fragments to implement different activity layouts.
	* This sample provides a different layout (and activity flow) when run in
	* landscape.
	*/
	public class FragmentLayoutSupport extends FragmentActivity {

	//BEGIN_INCLUDE(main)
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	setContentView(R.layout.fragment_layout_support);
	}
	//END_INCLUDE(main)

	/**
	* This is a secondary activity, to show what the user has selected
	* when the screen is not large enough to show it all in one activity.
	*/
	//BEGIN_INCLUDE(details_activity)
	public static class DetailsActivity extends FragmentActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	if (getResources().getConfiguration().orientation
	== Configuration.ORIENTATION_LANDSCAPE) {
	// If the screen is now in landscape mode, we can show the
	// dialog in-line with the list so we don't need this activity.
	finish();
	return;
	}

	if (savedInstanceState == null) {
	// During initial setup, plug in the details fragment.
	DetailsFragment details = new DetailsFragment();
	details.setArguments(getIntent().getExtras());
	getSupportFragmentManager().beginTransaction().add(
	android.R.id.content, details).commit();
	}
	}
	}
	//END_INCLUDE(details_activity)

	/**
	* This is the "top-level" fragment, showing a list of items that the
	* user can pick. Upon picking an item, it takes care of displaying the
	* data to the user as appropriate based on the currrent UI layout.
	*/
	//BEGIN_INCLUDE(titles)
	public static class TitlesFragment extends ListFragment {
	boolean mDualPane;
	int mCurCheckPosition = 0;

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);

	// Populate list with our static array of titles.
	setListAdapter(new ArrayAdapter<String>(getActivity(),
	R.layout.simple_list_item_checkable_1,
	android.R.id.text1, Shakespeare.TITLES));

	// Check to see if we have a frame in which to embed the details
	// fragment directly in the containing UI.
	View detailsFrame = getActivity().findViewById(R.id.details);
	mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;

	if (savedInstanceState != null) {
	// Restore last state for checked position.
	mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
	}

	if (mDualPane) {
	// In dual-pane mode, the list view highlights the selected item.
	getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
	// Make sure our UI is in the correct state.
	showDetails(mCurCheckPosition);
	}
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	outState.putInt("curChoice", mCurCheckPosition);
	}

	@Override
	public void onListItemClick(ListView l, View v, int position, long id) {
	showDetails(position);
	}

	/**
	* Helper function to show the details of a selected item, either by
	* displaying a fragment in-place in the current UI, or starting a
	* whole new activity in which it is displayed.
	*/
	void showDetails(int index) {
	mCurCheckPosition = index;

	if (mDualPane) {
	// We can display everything in-place with fragments, so update
	// the list to highlight the selected item and show the data.
	getListView().setItemChecked(index, true);

	// Check what fragment is currently shown, replace if needed.
	DetailsFragment details = (DetailsFragment)
	getFragmentManager().findFragmentById(R.id.details);
	if (details == null \|\| details.getShownIndex() != index) {
	// Make new fragment to show this selection.
	details = DetailsFragment.newInstance(index);

	// Execute a transaction, replacing any existing fragment
	// with this one inside the frame.
	getFragmentManager().beginTransaction()
	.replace(R.id.details, details)
	.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
	.commit();
	}

	} else {
	// Otherwise we need to launch a new activity to display
	// the dialog fragment with selected text.
	Intent intent = new Intent();
	intent.setClass(getActivity(), DetailsActivity.class);
	intent.putExtra("index", index);
	startActivity(intent);
	}
	}
	}
	//END_INCLUDE(titles)

	/**
	* This is the secondary fragment, displaying the details of a particular
	* item.
	*/
	//BEGIN_INCLUDE(details)
	public static class DetailsFragment extends Fragment {
	/**
	* Create a new instance of DetailsFragment, initialized to
	* show the text at 'index'.
	*/
	public static DetailsFragment newInstance(int index) {
	DetailsFragment f = new DetailsFragment();

	// Supply index input as an argument.
	Bundle args = new Bundle();
	args.putInt("index", index);
	f.setArguments(args);

	return f;
	}

	public int getShownIndex() {
	return getArguments().getInt("index", 0);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	if (container == null) {
	// We have different layouts, and in one of them this
	// fragment's containing frame doesn't exist. The fragment
	// may still be created from its saved state, but there is
	// no reason to try to create its view hierarchy because it
	// won't be displayed. Note this is not needed -- we could
	// just run the code below, where we would create and return
	// the view hierarchy; it would just never be used.
	return null;
	}

	ScrollView scroller = new ScrollView(getActivity());
	TextView text = new TextView(getActivity());
	int padding = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
	4, getActivity().getResources().getDisplayMetrics());
	text.setPadding(padding, padding, padding, padding);
	scroller.addView(text);
	text.setText(Shakespeare.DIALOGUE[getShownIndex()]);
	return scroller;
	}
	}
	//END_INCLUDE(details)
	}