Fragment保存页面不销毁

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在用fragmenttabhost做页面切换的时候，发现只要一来回切换fragment，fragment页面就会重新初始化，也就是执行onCreateView()方法，导致每次Fragment的布局都重绘，无法保持Fragment原有状态

解决方案：

在Fragment onCreateView方法中缓存View

代码实现：

protected WeakReference<View> mRootView;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        // detach/attach can lead to view recreate frequently        if (mRootView == null || mRootView.get() == null) {            View view=inflater.inflate(R.layout.tab_fragment, null);              mRootView = new WeakReference<View>(view);        } else {            ViewGroup parent = (ViewGroup) mRootView.get().getParent();            if (parent != null) {                parent.removeView(mRootView.get());            }        }        return mRootView.get();    }