fragment页签使用方法

//fragment页签使用方法

//初始化时候将缓存的所有fragment全部隐藏
List<Fragment> fragments=getSupportFragmentManager().getFragments();
if(fragments!=null) {
	for(int i=0;i<fragments.size();i++) {
		getSupportFragmentManager().beginTransaction().hide(fragments.get(i)).commit();
	}
}

//加载显示相应的fragment
if(currentFragmentTitle.equals("new")) {
	switchFragment("new", 0);
}
else if(currentFragmentTitle.equals("locate")) {
	switchFragment("locate", 1);
}
else if(currentFragmentTitle.equals("user")) {
	switchFragment("user", 2);
}

//切换fragment页签方法
private void switchFragment(String title, int position) {
	FragmentTransaction transaction=getSupportFragmentManager().beginTransaction();
	if(currentFragment!=null) {
		transaction.hide(currentFragment);
	}
	Fragment toFragment=getSupportFragmentManager().findFragmentByTag(title);
	if(toFragment==null) {
		if(position==0) {
			toFragment=new HomepageFragment();
		}
		else if(position==1) {
			toFragment=new GoShopingFragment();
		}
		else if(position==2) {
			toFragment=new UserCenterFragment();
		}
		transaction.add(R.id.main_content, toFragment, title);
	}
	else {
		transaction.show(toFragment);
	}
	transaction.commit();
	currentFragment=toFragment;
	currentFragmentTitle=title;
	
	tabbar_new.setImageResource(R.drawable.btn_bottom_new);
	tabbar_locate.setImageResource(R.drawable.btn_bottom_locate);
	tabbar_user.setImageResource(R.drawable.btn_bottom_user);
	if(position==0) {
		tabbar_new.setImageResource(R.drawable.btn_bottom_new_active);
	}
	else if(position==1) {
		tabbar_locate.setImageResource(R.drawable.btn_bottom_locate_active);
	}
	else if(position==2) {
		tabbar_user.setImageResource(R.drawable.btn_bottom_user_active);
	}
}

//保存可能产生的变量
@Override
protected void onSaveInstanceState(Bundle outState) {
	// TODO Auto-generated method stub
	super.onSaveInstanceState(outState);
	outState.putString("currentFragmentTitle", currentFragmentTitle);
}