FragmentTabHost切换Fragment时避免UI重新加载

每次FragmentTabHost切换fragment时会调用onCreateView()重绘UI。 

解决方法,在fragment onCreateView 里缓存View: 

private View rootView;// 缓存Fragment view @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.i(TAG, "onCreateView"); if (rootView == null) { rootView = inflater.inflate(R.layout.fragment_1, null); } // 缓存的rootView需要判断是否已经被加过parent,如果有parent需要从parent删除,要不然会发生这个rootview已经有parent的错误。 ViewGroup parent = (ViewGroup) rootView.getParent(); if (parent != null) { parent.removeView(rootView); } return rootView; }