android使用邮箱发送验证码

该压缩包为使用邮箱发送验证码的实例，里面关键代码部分都有详细的注释。

/* AUTO-GENERATED FILE.  DO NOT MODIFY.
 *
 * This class was automatically generated by the
 * gradle plugin from the resource data it found. It
 * should not be modified by hand.
 */
package android.arch.core;

public final class R {
    private R（） {}

}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-12-04 07:14  sendEmailCode\
     文件         187  2018-12-04 07:13  sendEmailCode\.gitignore
     目录           0  2018-12-04 07:14  sendEmailCode\.gradle\
     目录           0  2018-12-04 07:17  sendEmailCode\.gradle\4.6\
     目录           0  2018-12-04 07:14  sendEmailCode\.gradle\4.6\fileChanges\
     文件           1  2018-12-04 13:52  sendEmailCode\.gradle\4.6\fileChanges\last-build.bin
     目录           0  2018-12-04 07:17  sendEmailCode\.gradle\4.6\fileContent\
     文件          17  2018-12-04 13:52  sendEmailCode\.gradle\4.6\fileContent\fileContent.lock
     目录           0  2018-12-04 07:14  sendEmailCode\.gradle\4.6\fileHashes\
     文件      266119  2018-12-04 13:52  sendEmailCode\.gradle\4.6\fileHashes\fileHashes.bin
     文件          17  2018-12-04 13:52  sendEmailCode\.gradle\4.6\fileHashes\fileHashes.lock
     文件       21217  2018-12-04 09:14  sendEmailCode\.gradle\4.6\fileHashes\resourceHashesCache.bin
     目录           0  2018-12-04 07:17  sendEmailCode\.gradle\4.6\javaCompile\
     文件      776305  2018-12-04 13:52  sendEmailCode\.gradle\4.6\javaCompile\classAnalysis.bin
     文件      327553  2018-12-04 09:14  sendEmailCode\.gradle\4.6\javaCompile\jarAnalysis.bin
     文件          17  2018-12-04 13:52  sendEmailCode\.gradle\4.6\javaCompile\javaCompile.lock
     文件      821793  2018-12-04 13:52  sendEmailCode\.gradle\4.6\javaCompile\taskHistory.bin
     文件       28692  2018-12-04 13:52  sendEmailCode\.gradle\4.6\javaCompile\taskJars.bin
     目录           0  2018-12-04 07:14  sendEmailCode\.gradle\4.6\taskHistory\
     文件     1336209  2018-12-04 13:52  sendEmailCode\.gradle\4.6\taskHistory\taskHistory.bin
     文件          17  2018-12-04 13:52  sendEmailCode\.gradle\4.6\taskHistory\taskHistory.lock
     目录           0  2018-12-04 07:14  sendEmailCode\.gradle\buildOutputCleanup\
     文件          17  2018-12-04 13:52  sendEmailCode\.gradle\buildOutputCleanup\buildOutputCleanup.lock
     文件          51  2018-12-04 07:14  sendEmailCode\.gradle\buildOutputCleanup\cache.properties
     文件       21251  2018-12-04 13:52  sendEmailCode\.gradle\buildOutputCleanup\outputFiles.bin
     目录           0  2018-12-04 07:14  sendEmailCode\.gradle\vcsWorkingDirs\
     文件           0  2018-12-04 07:14  sendEmailCode\.gradle\vcsWorkingDirs\gc.properties
     目录           0  2018-12-04 14:03  sendEmailCode\.idea\
     目录           0  2018-12-04 08:32  sendEmailCode\.idea\caches\
     文件         537  2018-12-04 08:49  sendEmailCode\.idea\caches\build_file_checksums.ser
     目录           0  2018-12-04 07:13  sendEmailCode\.idea\codestyles\
............此处省略2273个文件信息