Android读写-阿里云

Android 11 system_server 读写 SDCARD 平台RK3566 + Android 11概述在之前的SDK(Android 5, 6, 7, 8, 9)中, 增加了服务和系统接口, 方便第三方应用调用. 其中有一些功能, 需要让SYSTEM去访问内部存储的文件.常用的路径有:File f = new File("/sdcard"); f = n...

开源Android容器化框架Atlas开发者指南

7 课时 |

1497 人已学 |

加入学习

【Android 高性能音频】AAudio 音频流缓冲区简介 ( AAudio 音频流内部缓冲区 | 缓冲区帧容量 | 缓冲区帧大小 | 音频数据读写缓冲区 ) 文章目录I . AAudio 音频流内部缓冲区与音频数据读写缓冲区概念II . AAudio 音频流内部缓冲区缓冲区帧容量 BufferCapacityInFrames 与缓冲区帧大小 BufferSizeInFrames 区分III . AAudio 音频流内部缓冲区缓冲区帧容量 Bu...

【Android 高性能音频】AAudio 音频流读写操作 ( 音频流读写数据 | 阻塞时间设定 | 注意事项 | AAudioStream_read | AAudioStream_write ) 文章目录I . AAudio 音频流读写操作简介II . AAudio 音频流读写操作阻塞时间设定III . AAudio 音频流读取固定帧数操作注意点IV . AAudio 音频流写出音频数据操作注意点V . AAudio 音频流读取方法 AAudioStream_read...

Android开发8——利用pull解析器读写XML文件一、基本介绍对XML解析有SAX和DOM等多种方式，Android中极力推荐xmlpull方式解析xml。xmlpull不仅可用在Android上同样也适用于javase，但在javase环境中需自己获取xmlpull所依赖的类库，kxml2-2.3.0.jar，xmlpull_1_1_3_4c....

在Android源码树中添加userspace I2C读写工具（i2c-util） by LiAnLab.org / 宋宝华通过/dev/i2c-n节点，用户可以在userspace直接访问板上的i2c外设寄存器，主要是透过I2C_RDWR这个IO控制命令将i2c_msg数组传递给kernel去执行。下面的代码可以完成这个功能： [cpp] view plaincopy...

android 64 sd卡读写的操作 package com.itheima.writesd; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; i...

Android读写assets、raw、sdard和工程文件的方法 Android开发离不开对文件的操作，前面的文章“Android简易数据存储之SharedPreferences”和“Android数据存储之SQLite的操作”，分别讲解了简单的数据的存储和数据库数据的操作。然而，前面的两篇文章都未涉及具体文件的操作。下面来看下Android是怎么操作其内置目录文...

android文件的写入与读取---简单的文本读写context.openFileInput() context.openFileOutput() 最终效果图，点击save会保存到文件中，点击show会从文件中读取出内容并显示。 main.xml   [xhtml] view plain copy   <?xml version="1.0" encoding="utf-8"?&g...

共有25条

< 1 2 3 >

跳转至： GO

本页面内关键词为智能算法引擎基于机器学习所生成，如有任何问题，可在页面底部提交“技术工单”与我们联系。

产品推荐

{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"第八代ECS云服务器ARM实例g8m。","iconImg":"https://img.alicdn.com/imgextra/i3/O1CN01i88SBP1rJt1KD8tYO_!!6000000005611-2-tps-200-200.png","contentLink":"https://www.aliyun.com/daily-act/ecs/ecs_yitian","title":"第八代ECS云服务器ARM实例g8m开放邀测","des":"ARM实例g8m基于倚天710处理器，有效应用于云原生、Android in Cloud、视频编解码和游戏服务等场景","link1":"https://page.aliyun.com/form/act1849678712/index.htm?spm=5176.26702442.J_2222087260.1.7fcf15afoqznH1","btn1":"立即申请邀测","link2":"https://help.aliyun.com/document_detail/108490.html#g8m","btn2":"产品文档","btn3":"","link3":"","infoGroup":[{"infoName":"优惠活动","infoContent":{"firstContentName":"ECS精选特惠","firstContentLink":"https://www.aliyun.com/daily-act/ecs/activity_selection","lastContentLink":"https://ecs-buy.aliyun.com/buyRedirect?spm=5176.21618197.J_2222087260.1.32657cfcCpl00i&regionId=cn-beijing&instanceType=ecs.c7.xlarge&periodType=Yearly","lastContentName":"ECS第7代云服务器"}},{"infoName":"产品入门","infoContent":{"firstContentName":"常见问题","lastContentName":"快速入门","firstContentLink":"https://help.aliyun.com/knowledge_detail/127067.html","lastContentLink":"https://help.aliyun.com/document_detail/25422.html"}},{"infoName":"相关产品","infoContent":{"firstContentLink":"https://help.aliyun.com/document_detail/25389.html","firstContentName":"镜像","lastContentName":"网络","lastContentLink":"https://help.aliyun.com/document_detail/61651.html"}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/imgextra/i3/O1CN01i88SBP1rJt1KD8tYO_!!6000000005611-2-tps-200-200.png","bannerTitle":"云服务器ECS ARM实例","bannerContent":"基于ARM芯片，结合神龙架构，稳定和可预期的性能的云服务器","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/daily-act/ecs/ecs_arm","contentTitle":"神龙架构与ARM芯片强强联合，超高且稳定可期的性能表现","homePageLink":"https://ecs-buy.aliyun.com/wizard?spm=5176.219089785176.J_2222087260.1.689f5934eSq2ZH#/prepay/cn-hangzhou?periodType=Yearly&instanceType=ecs.g6r.xlarge","homePageName":"立即购买","linkGroup":[{"linkContent":"基于ARM芯片"},{"linkContent":"稳定和可预期的性能"},{"linkContent":"神龙架构"}]}],"title":{"mainTitle":"第八代ECS云服务器ARM实例g8m开放邀测","subtitle":"ARM实例g8m基于倚天710处理器，有效应用于云原生、Android in Cloud、视频编解码和游戏服务等场景","linkUrl":"https://www.aliyun.com/daily-act/ecs/ecs_yitian","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}

{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"第八代ECS云服务器ARM实例g8m。","iconImg":"https://img.alicdn.com/imgextra/i3/O1CN01i88SBP1rJt1KD8tYO_!!6000000005611-2-tps-200-200.png","contentLink":"https://www.aliyun.com/daily-act/ecs/ecs_yitian","title":"第八代ECS云服务器ARM实例g8m开放邀测","des":"ARM实例g8m基于倚天710处理器，有效应用于云原生、Android in Cloud、视频编解码和游戏服务等场景","link1":"https://page.aliyun.com/form/act1849678712/index.htm?spm=5176.26702442.J_2222087260.1.7fcf15afoqznH1","btn1":"立即申请邀测","link2":"https://help.aliyun.com/document_detail/108490.html#g8m","btn2":"产品文档","btn3":"","link3":"","infoGroup":[{"infoName":"优惠活动","infoContent":{"firstContentName":"ECS精选特惠","firstContentLink":"https://www.aliyun.com/daily-act/ecs/activity_selection","lastContentLink":"https://ecs-buy.aliyun.com/buyRedirect?spm=5176.21618197.J_2222087260.1.32657cfcCpl00i&regionId=cn-beijing&instanceType=ecs.c7.xlarge&periodType=Yearly","lastContentName":"ECS第7代云服务器"}},{"infoName":"产品入门","infoContent":{"firstContentName":"常见问题","lastContentName":"快速入门","firstContentLink":"https://help.aliyun.com/knowledge_detail/127067.html","lastContentLink":"https://help.aliyun.com/document_detail/25422.html"}},{"infoName":"相关产品","infoContent":{"firstContentLink":"https://help.aliyun.com/document_detail/25389.html","firstContentName":"镜像","lastContentName":"网络","lastContentLink":"https://help.aliyun.com/document_detail/61651.html"}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/imgextra/i3/O1CN01i88SBP1rJt1KD8tYO_!!6000000005611-2-tps-200-200.png","bannerTitle":"云服务器ECS ARM实例","bannerContent":"基于ARM芯片，结合神龙架构，稳定和可预期的性能的云服务器","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/daily-act/ecs/ecs_arm","contentTitle":"神龙架构与ARM芯片强强联合，超高且稳定可期的性能表现","homePageLink":"https://ecs-buy.aliyun.com/wizard?spm=5176.219089785176.J_2222087260.1.689f5934eSq2ZH#/prepay/cn-hangzhou?periodType=Yearly&instanceType=ecs.g6r.xlarge","homePageName":"立即购买","linkGroup":[{"linkContent":"基于ARM芯片"},{"linkContent":"稳定和可预期的性能"},{"linkContent":"神龙架构"}]}],"title":{"mainTitle":"第八代ECS云服务器ARM实例g8m开放邀测","subtitle":"ARM实例g8m基于倚天710处理器，有效应用于云原生、Android in Cloud、视频编解码和游戏服务等场景","linkUrl":"https://www.aliyun.com/daily-act/ecs/ecs_yitian","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}}