inflaterでの縦横レイアウト自動切り替え

■AndroidManifest

android:configChanges　を設定
■Activity

    protected View targetLayout;

    protected LayoutInflater inflater;
    /**

     * 画面を切り替えたときの挙動

     */

    public void onConfigurationChanged(Configuration newConfig) {

        super.onConfigurationChanged(newConfig);

        if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {

            setPortrait();

        } else {

            setLandscape();

        }

    }
    /**

     * 縦画面設定

     */

    public void setPortrait() {

        if (inflater == null)

            inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);

        targetLayout = inflater.inflate(R.layout.＜レイアウトファイル指定＞, null);

        changeLayout(findViewById(R.id.＜対象のレイアウトのID指定＞));

    }
    /**

     * 横画面設定

     */

    public void setLandscape() {

        if (inflater == null)

            inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);

        targetLayout = inflater.inflate(R.layout.＜レイアウトファイル指定＞, null);

        changeLayout(findViewById(R.id.＜対象のレイアウトのID指定＞));

    }
    /**

     * targetLayoutに設定されているRelativeLayout.LayoutParamsの内容を、

     * 同じIDをもつsourceViewを含むすべての子Viewにコピーする

     * 

     * @param sourceView

     */

    public void changeLayout(View sourceView) {

        View targetView = targetLayout.findViewById(sourceView.getId());

        if (targetView != null) {

            if (sourceView.getLayoutParams() instanceof RelativeLayout.LayoutParams) {

                RelativeLayout.LayoutParams sourceLayoutParams = (RelativeLayout.LayoutParams)sourceView

                        .getLayoutParams();

                RelativeLayout.LayoutParams targetLayoutParams = (RelativeLayout.LayoutParams)targetView

                        .getLayoutParams();

                for (int i = 0; i < targetLayoutParams.getRules().length; i++) {

                    sourceLayoutParams.addRule(i, targetLayoutParams.getRules()[i]);

                }

                sourceLayoutParams.width = targetLayoutParams.width;

                sourceLayoutParams.height = targetLayoutParams.height;

                sourceLayoutParams.leftMargin = targetLayoutParams.leftMargin;

                sourceLayoutParams.rightMargin = targetLayoutParams.rightMargin;

                sourceLayoutParams.topMargin = targetLayoutParams.topMargin;

                sourceLayoutParams.bottomMargin = targetLayoutParams.bottomMargin;

                sourceLayoutParams.alignWithParent = targetLayoutParams.alignWithParent;
            } else if (sourceView.getLayoutParams() instanceof LinearLayout.LayoutParams) {

                LinearLayout.LayoutParams sourceLayoutParams = (LinearLayout.LayoutParams)sourceView

                        .getLayoutParams();

                LinearLayout.LayoutParams targetLayoutParams = (LinearLayout.LayoutParams)targetView

                        .getLayoutParams();

                sourceLayoutParams.width = targetLayoutParams.width;

                sourceLayoutParams.height = targetLayoutParams.height;

                sourceLayoutParams.leftMargin = targetLayoutParams.leftMargin;

                sourceLayoutParams.rightMargin = targetLayoutParams.rightMargin;

                sourceLayoutParams.topMargin = targetLayoutParams.topMargin;

                sourceLayoutParams.bottomMargin = targetLayoutParams.bottomMargin;

                sourceLayoutParams.weight = targetLayoutParams.weight;

                sourceLayoutParams.gravity = targetLayoutParams.gravity;

            }

        }

        if (sourceView instanceof ViewGroup) {

            ViewGroup sourceViewGroup = (ViewGroup)sourceView;

            for (int i = 0; i < sourceViewGroup.getChildCount(); i++) {

                changeLayout(sourceViewGroup.getChildAt(i));

            }

        }

    }
毎回実装するのがめんどくさいのでメモ

■■■■■■■■■追記■■■■■■■■■

上記実装を行うとUIと端末状態によってはメモリーリークが発生する
なので下記処理を実装するとよいことが起きる。
    @Override

    public void onDestroy() {

        super.onDestroy();

        cleanUpDrawable(findViewById(R.id.＜対象のレイアウトのID指定＞));

    }   
    /**

     * Bitmapのメモリリーク対策

     *

     * @param view　トップレベルのViewを指定

     */

    public static final void cleanUpDrawable(View view) {

        if (view == null) {

            return;

        }
        // 全View共通

        view.setBackgroundDrawable(null);
        // 各種View個別

        if (view instanceof ImageView) {

            ImageView iv = (ImageView)view;

            iv.setImageDrawable(null);

        } else if (view instanceof ImageButton) {

            ImageButton ib = (ImageButton)view;

            ib.setImageDrawable(null);

        } else if (view instanceof SeekBar) {

            SeekBar sb = (SeekBar)view;

            sb.setProgressDrawable(null);

            sb.setThumb(null);

        } else {

            // 追加予定

        }
        // 子Viewに再帰的に適用

        if (view instanceof ViewGroup) {

            ViewGroup vg = (ViewGroup)view;

            int count = vg.getChildCount();

            for (int i = 0; i < count; i++) {

                cleanUpDrawable(vg.getChildAt(i));

            }

        }

    }