ViewPager不设置预加载和Fragment只加载一次

/**
 * Automatically generated file. DO NOT MODIFY
 */
package com.example.qd.fragmentdemo;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean（“true“）;
  public static final String APPLICATION_ID = “com.example.qd.fragmentdemo“;
  public static final String BUILD_TYPE = “debug“;
  public static final String FLAVOR = ““;
  public static final int VERSION_CODE = 1;
  public static final String VERSION_NAME = “1.0“;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-11-26 11:27  FragmentDemo
     文件         127  2018-11-26 11:22  FragmentDemo.gitignore
     目录           0  2018-11-26 11:23  FragmentDemo.gradle
     目录           0  2018-11-26 11:45  FragmentDemo.gradle4.1
     目录           0  2018-11-26 11:23  FragmentDemo.gradle4.1fileChanges
     文件           1  2018-11-26 15:17  FragmentDemo.gradle4.1fileChangeslast-build.bin
     目录           0  2018-11-26 11:45  FragmentDemo.gradle4.1fileContent
     文件          17  2018-11-26 15:17  FragmentDemo.gradle4.1fileContentfileContent.lock
     目录           0  2018-11-26 11:23  FragmentDemo.gradle4.1fileHashes
     文件      161333  2018-11-26 15:17  FragmentDemo.gradle4.1fileHashesfileHashes.bin
     文件          17  2018-11-26 15:17  FragmentDemo.gradle4.1fileHashesfileHashes.lock
     文件       20027  2018-11-26 11:45  FragmentDemo.gradle4.1fileHashes
esourceHashesCache.bin
     目录           0  2018-11-26 11:45  FragmentDemo.gradle4.1javaCompile
     文件      814415  2018-11-26 15:17  FragmentDemo.gradle4.1javaCompileclassAnalysis.bin
     文件      335013  2018-11-26 11:45  FragmentDemo.gradle4.1javaCompilejarAnalysis.bin
     文件          17  2018-11-26 15:17  FragmentDemo.gradle4.1javaCompilejavaCompile.lock
     文件      392359  2018-11-26 15:17  FragmentDemo.gradle4.1javaCompile askHistory.bin
     文件       20968  2018-11-26 15:17  FragmentDemo.gradle4.1javaCompile askJars.bin
     目录           0  2018-11-26 11:23  FragmentDemo.gradle4.1 askHistory
     文件     1392706  2018-11-26 15:17  FragmentDemo.gradle4.1 askHistoryfileSnapshots.bin
     文件       51245  2018-11-26 15:17  FragmentDemo.gradle4.1 askHistory askHistory.bin
     文件          17  2018-11-26 15:17  FragmentDemo.gradle4.1 askHistory askHistory.lock
     目录           0  2018-11-26 11:23  FragmentDemo.gradleuildOutputCleanup
     文件           0  2018-11-26 11:23  FragmentDemo.gradleuildOutputCleanupuilt.bin
     文件          51  2018-11-26 11:23  FragmentDemo.gradleuildOutputCleanupcache.properties
     文件           2  2018-11-26 15:17  FragmentDemo.gradleuildOutputCleanupcache.properties.lock
     目录           0  2018-11-26 15:34  FragmentDemo.idea
     文件         626  2018-11-26 11:23  FragmentDemo.ideagradle.xml
     目录           0  2018-11-26 11:28  FragmentDemo.idealibraries
     文件         233  2018-11-26 11:25  FragmentDemo.idealibrariesandroid_android_26.xml
     文件         533  2018-11-26 11:25  FragmentDemo.idealibrariesandroid_arch_core_common_1_0_0_jar.xml
............此处省略1386个文件信息