101 lines
2.3 KiB
Java
101 lines
2.3 KiB
Java
package com.uiui.zyos.base;
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import android.os.Bundle;
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import androidx.fragment.app.Fragment;
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/**
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* Author: wangjie
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* Email: tiantian.china.2@gmail.com
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* Date: 1/23/15.
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*/
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public abstract class BaseLazyFragment extends Fragment {
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private static final String TAG = BaseLazyFragment.class.getSimpleName();
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private boolean isPrepared;
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@Override
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public void onActivityCreated(Bundle savedInstanceState) {
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super.onActivityCreated(savedInstanceState);
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initPrepare();
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}
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/**
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* 第一次onResume中的调用onUserVisible避免操作与onFirstUserVisible操作重复
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*/
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private boolean isFirstResume = true;
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@Override
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public void onResume() {
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super.onResume();
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if (isFirstResume) {
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isFirstResume = false;
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return;
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}
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if (getUserVisibleHint()) {
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onUserVisible();
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}
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}
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@Override
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public void onPause() {
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super.onPause();
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if (getUserVisibleHint()) {
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onUserInvisible();
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}
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}
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private boolean isFirstVisible = true;
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private boolean isFirstInvisible = true;
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@Override
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public void setUserVisibleHint(boolean isVisibleToUser) {
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super.setUserVisibleHint(isVisibleToUser);
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if (isVisibleToUser) {
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if (isFirstVisible) {
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isFirstVisible = false;
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initPrepare();
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} else {
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onUserVisible();
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}
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} else {
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if (isFirstInvisible) {
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isFirstInvisible = false;
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onFirstUserInvisible();
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} else {
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onUserInvisible();
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}
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}
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}
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public synchronized void initPrepare() {
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if (isPrepared) {
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onFirstUserVisible();
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} else {
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isPrepared = true;
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}
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}
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/**
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* 第一次fragment可见（进行初始化工作）
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*/
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public abstract void onFirstUserVisible();
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/**
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* fragment可见（切换回来或者onResume）
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*/
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public abstract void onUserVisible();
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/**
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* 第一次fragment不可见（不建议在此处理事件）
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*/
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public abstract void onFirstUserInvisible();
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/**
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* fragment不可见（切换掉或者onPause）
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*/
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public abstract void onUserInvisible();
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}
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