Android studio 使用自带DownloadManager实现更新app

使用android 自带的DownloadManager实现文件下载，兼容性强，代码简单，注释详细

/**
 * Automatically generated file. DO NOT MODIFY
 */
package com.example.administrator.myappupdata.test;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean（“true“）;
  public static final String APPLICATION_ID = “com.example.administrator.myappupdata.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  2017-01-17 14:41  MyAppUpdata\
     文件         127  2017-01-17 08:42  MyAppUpdata\.gitignore
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\2.14.1\
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\2.14.1\taskArtifacts\
     文件          31  2017-01-17 08:43  MyAppUpdata\.gradle\2.14.1\taskArtifacts\cache.properties
     文件          17  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\taskArtifacts\cache.properties.lock
     文件      154290  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\taskArtifacts\fileHashes.bin
     文件     3257194  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\taskArtifacts\fileSnapshots.bin
     文件       30056  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\taskArtifacts\fileSnapshotsToTreeSnapshotsIndex.bin
     文件      147278  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\taskArtifacts\taskArtifacts.bin
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\2.14.1\tasks\
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\localClassSetAnalysis\
     文件       29862  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\localClassSetAnalysis\localClassSetAnalysis.bin
     文件          17  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\localClassSetAnalysis\localClassSetAnalysis.lock
     目录           0  2017-01-17 14:41  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\localJarClasspathSnapshot\
     文件       20010  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\localJarClasspathSnapshot\localJarClasspathSnapshot.bin
     文件          17  2017-01-17 14:39  MyAppUpdata\.gradle\2.14.1\tasks\_app_compileDebugJavaWithJavac\localJarClasspathSnapshot\localJarClasspathSnapshot.lock
     目录           0  2017-01-17 14:41  MyAppUpdata\.idea\
     文件         686  2017-01-17 08:42  MyAppUpdata\.idea\compiler.xml
     目录           0  2017-01-17 14:41  MyAppUpdata\.idea\copyright\
     文件          76  2017-01-17 08:42  MyAppUpdata\.idea\copyright\profiles_settings.xml
     文件         700  2017-01-17 08:43  MyAppUpdata\.idea\gradle.xml
     目录           0  2017-01-17 14:41  MyAppUpdata\.idea\libraries\
     文件         645  2017-01-17 08:45  MyAppUpdata\.idea\libraries\animated_vector_drawable_25_1_0.xml
     文件         585  2017-01-17 08:45  MyAppUpdata\.idea\libraries\appcompat_v7_25_1_0.xml
     文件         627  2017-01-17 08:45  MyAppUpdata\.idea\libraries\espresso_core_2_2_2.xml
     文件         682  2017-01-17 08:45  MyAppUpdata\.idea\libraries\espresso_idling_resource_2_2_2.xml
     文件         700  2017-01-17 08:45  MyAppUpdata\.idea\libraries\exposed_instrumentation_api_publish_0_5.xml
     文件         526  2017-01-17 08:45  MyAppUpdata\.idea\libraries\hamcrest_core_1_3.xml
............此处省略2338个文件信息