andriod studio 点击按钮显示图片的

andriod studio 点击按钮显示图片的例子，两个按钮，两个图片轮流显示，入门的经典代码

/**
 * Automatically generated file. DO NOT MODIFY
 */
package com.example.lenovo.chenshowpic.test;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean（“true“）;
  public static final String APPLICATION_ID = “com.example.lenovo.chenshowpic.test“;
  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  2018-02-09 07:41  3_chenshowpic\
     文件         127  2018-02-08 08:29  3_chenshowpic\.gitignore
     目录           0  2018-02-08 08:29  3_chenshowpic\.gradle\
     目录           0  2018-02-08 08:38  3_chenshowpic\.gradle\4.1\
     目录           0  2018-02-08 08:29  3_chenshowpic\.gradle\4.1\fileChanges\
     文件           1  2018-02-09 20:43  3_chenshowpic\.gradle\4.1\fileChanges\last-build.bin
     目录           0  2018-02-08 08:38  3_chenshowpic\.gradle\4.1\fileContent\
     文件          17  2018-02-08 08:57  3_chenshowpic\.gradle\4.1\fileContent\fileContent.lock
     目录           0  2018-02-08 08:30  3_chenshowpic\.gradle\4.1\fileHashes\
     文件      369005  2018-02-09 20:43  3_chenshowpic\.gradle\4.1\fileHashes\fileHashes.bin
     文件          17  2018-02-09 20:43  3_chenshowpic\.gradle\4.1\fileHashes\fileHashes.lock
     文件       25535  2018-02-08 08:55  3_chenshowpic\.gradle\4.1\fileHashes\resourceHashesCache.bin
     目录           0  2018-02-08 08:39  3_chenshowpic\.gradle\4.1\javaCompile\
     文件     1948677  2018-02-08 08:55  3_chenshowpic\.gradle\4.1\javaCompile\classAnalysis.bin
     文件      852221  2018-02-08 08:55  3_chenshowpic\.gradle\4.1\javaCompile\jarAnalysis.bin
     文件          17  2018-02-08 08:55  3_chenshowpic\.gradle\4.1\javaCompile\javaCompile.lock
     文件      281774  2018-02-08 08:55  3_chenshowpic\.gradle\4.1\javaCompile\taskHistory.bin
     文件       27742  2018-02-08 08:55  3_chenshowpic\.gradle\4.1\javaCompile\taskJars.bin
     目录           0  2018-02-08 08:29  3_chenshowpic\.gradle\4.1\taskHistory\
     文件     2116311  2018-02-09 20:13  3_chenshowpic\.gradle\4.1\taskHistory\fileSnapshots.bin
     文件       85565  2018-02-09 20:13  3_chenshowpic\.gradle\4.1\taskHistory\taskHistory.bin
     文件          17  2018-02-09 20:43  3_chenshowpic\.gradle\4.1\taskHistory\taskHistory.lock
     目录           0  2018-02-08 08:29  3_chenshowpic\.gradle\buildOutputCleanup\
     文件           0  2018-02-08 08:29  3_chenshowpic\.gradle\buildOutputCleanup\built.bin
     文件          51  2018-02-08 08:29  3_chenshowpic\.gradle\buildOutputCleanup\cache.properties
     文件           2  2018-02-09 20:43  3_chenshowpic\.gradle\buildOutputCleanup\cache.properties.lock
     目录           0  2018-02-09 20:43  3_chenshowpic\.idea\
     文件         626  2018-02-08 08:29  3_chenshowpic\.idea\gradle.xml
     目录           0  2018-02-09 20:43  3_chenshowpic\.idea\libraries\
     文件         533  2018-02-09 20:43  3_chenshowpic\.idea\libraries\android_arch_core_common_1_0_0_jar.xml
     文件         548  2018-02-09 20:43  3_chenshowpic\.idea\libraries\android_arch_lifecycle_common_1_0_0_jar.xml
............此处省略2455个文件信息