接入Google drive的开发过程

开始

一开始是在使用Android studio编译的apk里面接入Google drive，后来由于公司在系统源码环境编译的apk也需要接入apk，对于两次开发做一次记录。

关键词

Google drive， Android studio， Android系统源码，aar

参考资料

Google driver 开发API ：https://developers.google.com/drive/
说明文档：https://developers.google.com/drive/android/intro
官方demo下载地址：https://github.com/googledrive/android-demos
maven地址：https://mvnrepository.com/artifact/com.google.android.gms
Android.mk引用aar：https://www.jianshu.com/p/63715928063b

步骤1

不管是Android studio编译还是Android 源码编译都需要登录谷歌开发平台获取API，网址是https://console.developers.google.com/

依次点击“凭据”-“创建凭据”-“OAuth客户端ID”

填入正确信息后创建。

步骤2

1. 使用Android studio编译：

在build.gradle(app）里面加入引用包

//google auth 验证
implementation 'com.google.android.gms:play-services-auth:11.6.0'
//google drive
implementation 'com.google.android.gms:play-services-drive:11.6.0'

接着参考https://github.com/googledrive/android-demos官方demo使用接口即可。

2. 使用源码编译：
   需要到maven里面下载相应的aar包（当初这里尝试找了很久，不清楚到底用哪个）具体需要下载哪个包可以参考Android studio编译的External Libraries
   
   红色框的都是需要自己去maven（网址：https://mvnrepository.com/artifact/com.google.android.gms）下载的。
   
   下载好后，放在需要在系统编译的apk的libs文件夹下，然后编写Android.mk文件

LOCAL_STATIC_JAVA_AAR_LIBRARIES := play-services-auth_aar \
                                   play-services-auth-api-phone_aar \
                                   play-services-auth-base_aar \
                                   play-services-base_aar \
                                   play-services-basement_aar \
                                   play-services-drive_aar \
                                   play-services-tasks_aar

LOCAL_AAPT_FLAGS := \
    --rename-manifest-package com.settings.istv811 \
    --auto-add-overlay \
    --extra-packages com.google.android.gms

include frameworks/opt/setupwizard/library/common-gingerbread.mk
include frameworks/base/packages/SettingsLib/common.mk
#include device/hisilicon/bigfish/appIst/CommonLib/Commonlib/cuslib/common.mk
include $(BUILD_PACKAGE)

include $(CLEAR_VARS)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := play-services-auth_aar:app/libs/play-services-auth-11.6.0.aar \
                                        play-services-auth-api-phone_aar:app/libs/play-services-auth-api-phone-11.6.0.aar \
                                        play-services-auth-api-phone-license_aar:app/libs/play-services-auth-api-phone-license-11.6.0.aar \
                                        play-services-auth-base_aar:app/libs/play-services-auth-base-11.6.0.aar \
                                        play-services-auth-base-license_aar:app/libs/play-services-auth-base-license-11.6.0.aar \
                                        play-services-base_aar:app/libs/play-services-base-11.6.0.aar \
                                        play-services-base-license_aar:app/libs/play-services-base-license-11.6.0.aar \
                                        play-services-basement_aar:app/libs/play-services-basement-11.6.0.aar \
                                        play-services-basement-license_aar:app/libs/play-services-basement-license-11.6.0.aar \
                                        play-services-drive_aar:app/libs/play-services-drive-11.6.0.aar \
                                        play-services-drive-license_aar:app/libs/play-services-drive-license-11.6.0.aar \
                                        play-services-tasks_aar:app/libs/play-services-tasks-11.6.0.aar \
                                        play-services-tasks-license_aar:app/libs/play-services-tasks-license-11.6.0.aar \


include $(BUILD_MULTI_PREBUILT)

使用LOCAL_STATIC_JAVA_LIBRARIES 要引入的jar定义一个变量名。
使用LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES 给定义的变量 设置一个引用路径

这两个对应的是关键代码

在androidmianfest.xml加上(xxx写上具体的数字)

 <uses-sdk android:minSdkVersion='xxx' />
 <uses-sdk android:targetSdkVersion='xxx' />

步骤3

接下来就是参考谷歌demo来使用接口编写自己的代码了
Google drive 接口demo：https://github.com/googledrive/android-demos