Fragment の宿題消化。縦画面時は詳細が出力されて、一定以上の解像度かつ横画面時には 2 ペインにする（縦画面時にリストを表示するわけではないのがシャレオツ）

arrays.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string-array name="lists">
        <item>ふう</item>
        <item>たあ</item>
        <item>ばあ</item>
    </string-array>
    <string-array name="list_values">
        <item>FOO</item>
        <item>TAR</item>
        <item>BAA</item>
    </string-array>
    
</resources>

main_activity.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:baselineAligned="false"
    android:orientation="horizontal"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >
        <!--
            fragment にするとリスト選択後の画面回転時に落ちる。
            FrameLayout にしても FragmentManager 経由でアクセスできるから代替可能らしいが、腑に落ちない
        -->    
        <FrameLayout
        android:id="@+id/f_detail"
        android:name="org.example.fortesting2.MainFragment"
        android:layout_width="0dip"
        android:layout_height="match_parent"
        android:layout_weight="1" />
    
</LinearLayout>

main_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/body"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerInParent="true"
        android:gravity="center" />

</RelativeLayout>

MainActivity.java

package org.example.fortesting2;

import android.os.Bundle;
import android.app.Activity;
import android.content.res.Configuration;
import android.util.DisplayMetrics;
import android.view.Menu;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main_activity);
		
		if(!isTowPane()){
		//	do something.
		//	アクションバーとか？
		}
	}
	
/**
 * 解像度が一定値以上かつディスプレイの状態が縦の場合に真を返す関数
 * @return
 */
	private boolean isTowPane(){
		int DISP_WIDTH = 800;
		DisplayMetrics displayMetrics = new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
		Configuration configuration = getResources().getConfiguration();
		return (displayMetrics.widthPixels >= DISP_WIDTH) && (configuration.orientation == Configuration.ORIENTATION_LANDSCAPE);
	}

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

MainFragment.java

package org.example.fortesting2;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MainFragment extends Fragment{

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.main_fragment, container, false);

		TextView textView = (TextView)view.findViewById(R.id.body);

		if(getArguments() != null){
			String[] tmp =  getResources().getStringArray(R.array.list_values);
			textView.setText(tmp[getArguments().getInt("key")]);
		}

		return view;
	}
}

MyListFragment.java

package org.example.fortesting2;


import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MyListFragment extends ListFragment{

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
		
		ArrayAdapter<CharSequence> arrayAdapter = ArrayAdapter.createFromResource(getActivity(), R.array.lists, android.R.layout.simple_list_item_1);
		setListAdapter(arrayAdapter);
	}

	@Override
	public void onListItemClick(ListView listView, View view, int position, long id) {		
		super.onListItemClick(listView, view, position, id);
		
		MainFragment mainFragment = new MainFragment();
		Bundle bundle = new Bundle();
		bundle.putInt("key", position);
		mainFragment.setArguments(bundle);
		
		FragmentManager fragmentManager = getFragmentManager();
		FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
		
		fragmentTransaction.replace(R.id.f_detail, mainFragment);
		fragmentTransaction.commit();
	}
}

sw600dp-land\main_activity.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:baselineAligned="false"
    android:orientation="horizontal"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <!--
        ここは fragment じゃないと駄目みたい。layout ファイルを経由してないからかな？
    -->
    <fragment
        android:id="@+id/f_list"
        android:name="org.example.fortesting2.MyListFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="3" />

    <FrameLayout
        android:id="@+id/f_detail"
        android:name="org.example.fortesting2.MainFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1" />

</LinearLayout>