Fragment实现了Android UI的分片管理，尤其在平板开发中，好处多多。这一篇将借助Android UI开发第二十六篇——Fragment间的通信、 Android UI开发第二十七篇——实现左右划出菜单 来实现。看图1的效果，左边使用LeftFragment实现，中间使用的CenterFragment实现。

public class SlidingActivity extends FragmentActivity implements LeftShowCenter{

	private SlidingMenu mSlidingMenu;

	private CenterFragment centerFragment;

	@Override

	protected void onCreate(Bundle arg0) {

		super.onCreate(arg0);

		setContentView(R.layout.main);

		DisplayMetrics dm = new DisplayMetrics();

		getWindowManager().getDefaultDisplay().getMetrics(dm);

		mSlidingMenu = (SlidingMenu) findViewById(R.id.slidingMenu);

		mSlidingMenu.setLeftWidth((dm.widthPixels / 5) * 2);

		mSlidingMenu.setRightWidth((dm.widthPixels / 5) * 3);

		View leftView = getLayoutInflater().inflate(R.layout.left_frame, null);

		View rightView = getLayoutInflater().inflate(R.layout.right_frame, null);

		View centerView = getLayoutInflater().inflate(R.layout.center_frame, null);

		mSlidingMenu.setLeftView(leftView);

		mSlidingMenu.setRightView(rightView);

		mSlidingMenu.setCenterView(centerView);

		FragmentTransaction t = this.getSupportFragmentManager()

				.beginTransaction();

		LeftFragment leftFragment = new LeftFragment();

		t.replace(R.id.left_frame, leftFragment);

		RightFragment rightFragment = new RightFragment();

		t.replace(R.id.right_frame, rightFragment);

		centerFragment = new CenterFragment();

		t.replace(R.id.center_frame, centerFragment);

		t.commit();

	}

	public void showLeft() {

		mSlidingMenu.showLeftView();

	}

	public void showRight() {

		mSlidingMenu.showRightView();

	}

	public void showCenter() {

		mSlidingMenu.showCenterView();

	}

	@Override

	public void leftShowCenter(int id) {

		// TODO Auto-generated method stub

		if(centerFragment!=null){

			centerFragment.updateView(id);

		}

	}

}

SlidingActivity继承自FragmentActivity，实现了LeftShowCenter的接口方法，LeftShowCenter接口的主要目的是实现Fragment间的通信。

图1