When you use MediaPlayer to play a local Mp3 file , you need to be aware of the problem with access paths and access permissions .1. Access path:/storage/emulated/0 This path is the root path of the phone, you can download the es file browser software to view the current playing MP3 specific path, through Environment.getexternalstoragedirectory (). GetPath () gets /storage/emulated/0 This sdcard path This in the organization void Android.media.MediaPlayer.setDataSource (String path) throws
This paper is suitable for fs4412 Development Board, the kernel used is linux4.9.9.1. Modify the device tree
VI Arch/arm/boot/dts/exynos4412-liebao.dts
Modify:
sdhci_2 {
bus-width =
2. Configure the Kernel
Make Menuconfig
2.1 Configuration SD Card Driver
Device Drivers--->
2.2 Support for file systems
File Systems--->
dos/fat/nt filesystems--->
2.3 Native language Encoding support
-*-Native Langu
SD card driver recently writtenProgram. After reading datasheet, sort it as follows:
The first thing you need to know is:SD card ProtocolAndHarddisk (File System)Block and sectorIt does not mean anything.
For sdks, see "Maid physical_layer_simplified_specification_ver_3.020.final_100518.pdf" (click to download)
The meanings of block and sector in the
To install an SD card, follow these steps:1. Use your fingers to gently hold the top slot and remove the back cover.2. Push the SD card into the slot until it gets stuck.Note: Make sure that the SD card's golden pin face is do
--------------------
The script is first extended and then formatted. One fat extension and one ext3 Partition
-------------------
#! /Bin/sh## Partition and format the SD card script# Usage mksdboot. Sh -- device/dev/SDB
Version = "0.1"
Execute (){$ *>/Dev/nullIf [$? -Ne 0]; thenEchoEcho "error: executing $ *"EchoExit 1Fi}
Version (){EchoEcho "'basename $ 1' version $ version"Echo
Exit 0}
Usage (){Echo"Usa
related applications in your device generally support the following file formats:
• Music: mp3, M4A, MP4, 3GP, 3GA, WMA, OGG, OGA, AAC and FLAC.
• Image: bmp, GIF, JPG, and PNG.
• Video: 3gp, MP4, AVI, WMV, FLV and mkv.
• File: doc, docx, xls, xlsx, ppt, pptx, pdf and txt.
In addition, some file formats are not supported and may be related to the software version of your device. Please download kiesfrom Samsung tocheck the current software version of the device to upgrade the lat
This article is translated from https://www.securecoding.cert.org/confluence/display/java/DRD00-J.+Do+not+store+sensitive+information+on+ External+storage+%28sd+card%29+unless+encrypted+first, there are additional deletions.Android offers several options for saving persistent application data, one of which is external storage (/sdcard,/mnt/sdcard). The external storage contains a miniature or standard-sized SD
I found that I could not write files to the USB flash drive/SD card today. I carefully checked that the USB flash drive is read-only. I tried to solve this problem using n methods:
1. chmod U + x/Media/usbdisk
The prompt "read-only file system" cannot be changed.
2. sudo Mount-o rw-O remount-o User-T vfat/dev/sdb1/Media/usbdiskA prompt is displayed for the read-only file system.
3. Formatting also promp
Solution:1. Supports Micro SD memory cards, but does not support standard SD cards2. The MIIX700-12isk supports a maximum of GB Micro SD memory card. Because the Micro SD memory card involves multiple brands, we recommend that you
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:
each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user
each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user
Each time through the output stream to the SD card to write files, connected to the computer, using MTP to simulate a mobile disk, open the disk but there is no such a file, and the way to see through the ADB, the cause of this phenomenon is that after each write, the MTP database is not updated, Because the update of the MTP database requires a large price ratio, so only in the restart, mount and the user
Recently, when working on the andoird project, we often encounter different machine models on the client side, resulting inProgramThere is a bug problem, and we cannot locate the exact location of this bug (because there is no log file ).
So I found the relevant information about writing program logs to the SD card, just like the Web log4j, to generate a log file to the
How do I add files to the SD card on the android simulator mobile phone?
Add a file directly to the SD card of the simulator in ddms. If an error occurs, such as: failed to push xxxxx.txt on emulator-: Read-Only file system, the error occurs because your sdcard permission is insufficient, you need to create an sdcard d
In the need of storage, the problem of the path is more confusing for beginners, the following is for Getcachedir (), Getfilesdir (), Getexternalfilesdir (), Getexternalcachedir () Some of the experience, Only for the reference of the Si-mi ...Preferred, need to be clear is the path of the respective representative where the specific locationGetcachedir () Path:/data/data/App package name/cache/directoryGetfilesdir () Path:/data/data/App package name/files/directoryGetexternalfilesdir () Path: s
The upload function of an image must provide the path of the uploaded image in the SD card, summarize some columns on the Internet, and modify the code. For more information, see, hope to help you
Recently, I am working on an image upload function. I need to provide the path for uploading images to the SD card. I have
SD card mounting File System: VFS: Cannot open root device "mmcblk0p2" solves the problem of using the initramfs file system. linux can run properly and read and write SD cards normally. However, it cannot be mounted when it is mounted on the SD card. The information about b
Although the permission to read and write the SD card is stated in the manifest file,
However, you still do not have permission when running the program. This is because the SD card itself does not have permission, so you need to modify the permissions of the SD
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.