Chronometer实现计时器的开始停止重置功能

安卓学习过程中Chronometer的使用，实现计时器的功能，包括开始、暂停、重置，以及时间显示

/**
 * Automatically generated file. DO NOT MODIFY
 */
package com.yuwenbo.zzu.chronometer.test;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean（“true“）;
  public static final String APPLICATION_ID = “com.yuwenbo.zzu.chronometer.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
----------- ---------  ---------- -----  ----

     文件        127  2017-11-17 15:35  Chronometer\.gitignore

     文件     145383  2017-11-26 15:26  Chronometer\.gradle\3.3\taskArtifacts\fileHashes.bin

     文件    3596857  2017-11-26 15:26  Chronometer\.gradle\3.3\taskArtifacts\fileSnapshots.bin

     文件     136952  2017-11-26 15:26  Chronometer\.gradle\3.3\taskArtifacts\taskArtifacts.bin

     文件         17  2017-11-26 15:26  Chronometer\.gradle\3.3\taskArtifacts\taskArtifacts.lock

     文件      34423  2017-11-22 01:43  Chronometer\.gradle\3.3\tasks\_app_compileDebugJavaWithJavac\localClassSetAnalysis\localClassSetAnalysis.bin

     文件         17  2017-11-22 01:43  Chronometer\.gradle\3.3\tasks\_app_compileDebugJavaWithJavac\localClassSetAnalysis\localClassSetAnalysis.lock

     文件      20081  2017-11-22 01:43  Chronometer\.gradle\3.3\tasks\_app_compileDebugJavaWithJavac\localJarClasspathSnapshot\localJarClasspathSnapshot.bin

     文件         17  2017-11-22 01:43  Chronometer\.gradle\3.3\tasks\_app_compileDebugJavaWithJavac\localJarClasspathSnapshot\localJarClasspathSnapshot.lock

     文件        686  2017-11-17 15:35  Chronometer\.idea\compiler.xml

     文件         76  2017-11-17 15:35  Chronometer\.idea\copyright\profiles_settings.xml

     文件        626  2017-11-17 15:35  Chronometer\.idea\gradle.xml

     文件        601  2017-11-26 15:13  Chronometer\.idea\libraries\animated_vector_drawable_25_3_1.xml

     文件        565  2017-11-26 15:13  Chronometer\.idea\libraries\appcompat_v7_25_3_1.xml

     文件        410  2017-11-26 15:13  Chronometer\.idea\libraries\constraint_layout_1_0_2.xml

     文件        337  2017-11-26 15:13  Chronometer\.idea\libraries\constraint_layout_solver_1_0_2.xml

     文件        579  2017-11-26 15:13  Chronometer\.idea\libraries\espresso_core_2_2_2.xml

     文件        612  2017-11-26 15:13  Chronometer\.idea\libraries\espresso_idling_resource_2_2_2.xml

     文件        630  2017-11-26 15:13  Chronometer\.idea\libraries\exposed_instrumentation_api_publish_0_5.xml

     文件        526  2017-11-26 15:13  Chronometer\.idea\libraries\hamcrest_core_1_3.xml

     文件        354  2017-11-26 15:13  Chronometer\.idea\libraries\hamcrest_integration_1_3.xml

     文件        342  2017-11-26 15:13  Chronometer\.idea\libraries\hamcrest_library_1_3.xml

     文件        330  2017-11-26 15:13  Chronometer\.idea\libraries\javawriter_2_1_1.xml

     文件        358  2017-11-26 15:13  Chronometer\.idea\libraries\javax_annotation_api_1_2.xml

     文件        324  2017-11-26 15:13  Chronometer\.idea\libraries\javax_inject_1.xml

     文件        330  2017-11-26 15:13  Chronometer\.idea\libraries\jsr305_2_0_1.xml

     文件        477  2017-11-26 15:13  Chronometer\.idea\libraries\junit_4_12.xml

     文件        540  2017-11-26 15:13  Chronometer\.idea\libraries\rules_0_5.xml

     文件        543  2017-11-26 15:13  Chronometer\.idea\libraries\runner_0_5.xml

     文件        495  2017-11-26 15:13  Chronometer\.idea\libraries\support_annotations_25_3_1.xml

............此处省略1676个文件信息