android usb mass storage app

Yesterday, the use of USB hard disk, found a piece is not recognized, a piece of recognition can not be opened later.The previous system update may have been a bug, but has not been used to move the hard disk, so no discovery.Start experimenting with various scenarios that have been tried and invalidated by the following:1, uninstall the USB drive, after restarting the system automatically installed, no use

On the android unlock page, plug in USB to open the USB storage settings page. Press the HOME Key/Return key to directly return to launcher, instead of sliding the screen lock page.1) If you disable setting -- developer options -- USB debugging disable, it indicates that the

Recently, the status of external storage devices needs to be monitored in the project, so this note has been collated for later viewing.Broadcasts emitted when the state of an external storage device changesCompare broadcasts in different states1. When inserting an external SD card:2. When removing an external SD card:3. When connecting the PC into USB

Brief introduction:This article describes how developers ' apps use media storage services (including Mediascanner, Mediaprovider, and media information parsing) in Android, and how to update the app's new or modified files to the media database, How to hide the files generated by the app in the multimedia application, how to monitor the changes of the media data

) {e.printstacktrace (); catch (Unsupportedencodingexception e) {//TODO auto-generated catch block E.printstacktrace (); Catch(IOException e) {//TODO auto-generated catch block E.printstacktrace (); } } }); } } Data/data/packagename/files/test is the file we write. SD storage (External storage)The Mnt/sdcard directory is the mount point of the SD card (just a point)

Android app power consumption statistics has always been a headache, manual statistics time is too long, automated statistics is not very accurate (the implementation of automation code needs to connect via USB, and USB will charge, which results in statistical data is not allowed). Later from the predecessor learned t

ensure that your application code is compatible3. In order to compile your application, change your build target to API8, because the low Android library does not recognize the Instailllocation property and does not compile your application.Applications that do not install external storageUsers use USB storage and computer sharing files or the system settings to

"memory_available" and getandroid:key= "Memory_sd_avail" style= "? android:attr/ Preferenceinformationstyle " android:title=" @string/memory_available " android:summary = "xx"/>Find "Memory_sd_avail" and getThis string is the SD card remaining capacity formatsize (Availableblocks * blockSize) + readOnly These two parameters multiply, Get the remaining capacity of the SD card in bytes availableblocks * blockSizeThe storage device is divided into

The friendly visual perception and stable and error-free performance come from our pursuit of aesthetics and comprehensive consideration. I have always enjoyed it from a technical point of view.This articleArticleIt is a must-have knowledge for Android Developers. It is not perfect but useful for everyone. This article is a supplement to the previous "android Learning Series (2) -- download in the notific

The friendly visual perception and stable and error-free performance come from our pursuit of aesthetics and comprehensive consideration. I have always enjoyed it from a technical point of view.This article is a must-have knowledge for android Developers. It is specially compiled and summarized for everyone. It is not perfect but useful. This article is about 《Android Learning Series (2) -- download in the