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。