package com.xw.common.base
|
|
import android.os.Bundle
|
import android.view.LayoutInflater
|
import android.view.View
|
import android.view.ViewGroup
|
import androidx.fragment.app.Fragment
|
|
abstract class BaseLazyloadFragment : Fragment() {
|
protected var rootView: View? = null
|
private var canVisible = false
|
/** 是否是第一次加载布局 */
|
private var isInitView = false
|
|
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
|
initLoadMoreViews()
|
isInitView = true
|
isCanLoadData
|
|
isVisible()
|
return getContentView(layoutInflater, container)
|
}
|
|
override fun onActivityCreated(savedInstanceState: Bundle?) {
|
super.onActivityCreated(savedInstanceState)
|
initData()
|
setListener()
|
setObservable()
|
init()
|
}
|
|
override fun setUserVisibleHint(isVisibleToUser: Boolean) {
|
super.setUserVisibleHint(isVisibleToUser)
|
|
//isVisibleToUser值表示:该Fragment的UI用户是否可见，获取该标志记录下来
|
if (isVisibleToUser) {
|
canVisible = true
|
isCanLoadData
|
} else {
|
canVisible = false
|
}
|
}
|
|
//所以能加载数据条件是view初始化完成并且对用户可见
|
private val isCanLoadData: Unit
|
private get() {
|
//所以能加载数据条件是view初始化完成并且对用户可见
|
if (canVisible && isInitView) {
|
loadData()
|
canVisible = false
|
isInitView = false
|
}
|
}
|
|
open fun setListener() {}
|
|
open fun setObservable() {}
|
|
open fun initData() {}
|
|
open fun init() {}
|
|
protected fun initLoadMoreViews() {}
|
|
/**
|
* 懒加载方法
|
*/
|
protected fun loadData() {}
|
|
abstract fun getContentView(inflater: LayoutInflater, container: ViewGroup?): View
|
|
}
|
