FragmentTabHost切换Fragment时避免重复加载UI(ViewPager切换Fragment时也适用)
2016-10-31 22:56
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使用FragmentTabHost时,Fragment之间切换时每次都会调用onCreateView方法,导致每次Fragment的布局都重绘,无法保持Fragment原有状态。
解决办法:在Fragment onCreateView方法中缓存View(此方法也适用 ViewPager切换Fragment的场景,切换时仍可以保存Fragment的状态)
[java]
view plain
copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/9e12f1d3e499fc949c886e7c9e0484f9)
<span style="font-size:18px;">private View rootView;//缓存Fragment view
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if(rootView==null){
rootView=inflater.inflate(R.layout.tab_fragment, 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;
} </span>
原文链接:http://blog.csdn.net/renpengben/article/details/12615487
另:上面的方式是缓存view的,还有一种思路,缓存fragment,实现状态的保存。参考文章: http://www.cnblogs.com/tiantianbyconan/p/3360938.html
解决办法:在Fragment onCreateView方法中缓存View(此方法也适用 ViewPager切换Fragment的场景,切换时仍可以保存Fragment的状态)
[java]
view plain
copy
![](https://oscdn.geek-share.com/Uploads/Images/Content/201611/a7c8e286f463007e2a900848b93dd72c.png)
<span style="font-size:18px;">private View rootView;//缓存Fragment view
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if(rootView==null){
rootView=inflater.inflate(R.layout.tab_fragment, 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;
} </span>
原文链接:http://blog.csdn.net/renpengben/article/details/12615487
另:上面的方式是缓存view的,还有一种思路,缓存fragment,实现状态的保存。参考文章: http://www.cnblogs.com/tiantianbyconan/p/3360938.html
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