xmagicj / Lazyfragment
类似微信,网易新闻 延迟加载Fragment基类 , 支持与ViewPager组合刷新全部Fragment
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类似案例:
微信 网易新闻
解决问题 1:
在多个Fragment需要加载的时候, 启动速度往往会变慢.
分析会发现并非所有的Fragment都需要第一时间将数据填充完毕.
因为它们都还没有被用户所"看见".
所以我们要达到的效果是Fragment被显示后才加载数据(lazy load).
LazyFragment由此诞生....鼓掌~~~~~~~~~~
例:
Toolbar + ViewPager + Fragment
解决问题 2:
ViewPager + PagerAdapter需要刷新所有子Fragment的场景.
不要new 新的 PagerAdapter 而采取reset数据的方式.
所以要求Fragment重新走initData方法.
具体参见代码示例
**搜索关键词 setForceLoad / refreshAllFragment / refreshData 即可找到关键代码~**
使用说明:
- extends BaseFragment
其他生命周期的方法需要重写 就自己overwrite
三个方法重点说明:
-
initViews();
抽象方法
与 onCreateView 类似.
initViews 是只要 Fragment 被创建就会执行的方法.
也就是说如果我们不想用 LazyLoad 模式
则把所有的初始化 和 加载数据方法都写在 initViews 即可. -
initData();
抽象方法
若将代码写在initData中, 则是在Fragment真正显示出来后才会去Load(懒加载). -
setForceLoad();
忽略isFirstLoad的值,强制刷新数据,前提是Visible & Prepared.
未Visible & Prepared的页面需要注意在RefreshData的时候视图为空的问题, 具体请参见实例代码
搜索关键词
setForceLoad / refreshAllFragment / refreshData 即可找到关键代码
注意事项(一定要看完):
有个FragmentTransaction的坑,在BaseFragment文件注释中有说明(注2部分)
/**
* 注2:
* 如果是通过FragmentTransaction的show和hide的方法来控制显示,调用的是onHiddenChanged.
* 针对初始就show的Fragment 为了触发onHiddenChanged事件 达到lazy效果
* 需要先hide再show
* 需要先hide再show
* 需要先hide再show
* eg:
* transaction.hide(aFragment);
* transaction.show(aFragment);
*/
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