How can I read the CID (Card Identification register) of an SD card with Java or C-Code in an Android phone? I tried "cat /sys/class/mmc_host/mmc1/mmc1:*/cid" but at least on the Samsung I7500 Galaxy it does not return the CID of the SD card because it is always the same number with different SD cards.
My daughter has a Blackberry Storm, and has ordered an Incredible, which is due to arrive Monday Sept. 13th. Is the card formatted in a format that Android can read? Or will I need to mount the card in my computer and copy all of the photos and stuff she wants to save, let Android reformat the card, mount it in the computer and transfer the stuff back onto the card? I would appreciate the advice of someone with knowledge of BB use of the Micro SD card.
There are a lot of different classes that can be used in various ways to read/write to files in Android. For example, you can make use of java.nio.ByteBuffer, FileOutputStream and BufferedOutputStream. Are there any general guidelines for what to use to read/write quickly to the SD card? For example, BufferedOutputStream seems as if it should make things faster but I'm unsure the buffer size should be set for. Specifically, I want to read/write byte arrays that are ~1Mb in size as quickly as I can.
I'm working on an Android application that needs to look at what images a user has stored. The problem is that if the user has the sdcard mounted via the USB cable, I can't read the list of images on the disk. Does anyone know of a way to tell if the usb is mounted so that I could just pop up a message informing the user that it won't work?
I need to directly read/write a file on sd card without cache. I can use "posix_fadvise" to achieve the purpose on Ubuntu I try NDK to make the function call, but it seems disabled on Android How can I do?
I was trying to read all Contacts field one by one and generated a v- card and store it into a database. When I have a huge number of contacts (say more than 150), while reading 155th contacts, I see my application is getting killed and cat log say it because of excessive JNI global refreences. Can anyone pls suggest what is causing the problem and how to solve it. Also, Im not seeing any errors if I have less than 150 contacts............
I am developing an application that needs to access data on the sd card. When I run on my development device (an odroid with Android 2.1) I have root access and can construct the path using:
However, when I install this on a phone (2.1) where I do not have root access I get files == null. I assume this is because I do not have the right permissions to read the data from the sd card. I also get files == null when just trying to list files on /sdcard. So the same applies without my constructed path.
Also, this app is not intended to be distributed through the app store and is needs to use data copied separately to the sd card so this is a real use-case. It is too much data to put in res/raw (I have tried, it did not work).
I have also tried adding: <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
To the manifest, even though I only want to read the sd card, but it did not help. I have not found a permission type for reading the storage.
So, I have Itunes Agent and when I had the 2 GB card it synced perfectly, no problem. So I get the 16GB card and my computer suddenly doesn't even 'recognize' that there's a device connected. WTF, So, not very computer savvy, I figure it must be the computer because the card seems fine in the phone?
as seen above in the desire forum, im having this issue. it just occurred today.i have a 16GB Sandisk, stock and unrooted. i move about 4 apps to SD card (out of the 30 ish apps i have, only 4 were available to be moved to SD).Micro SD card mounted as Read Only? - HTC EVO? 4G (Sprint) - Android Forums - HTC Community.seems all of us having this issue posted today or within a day or so.. so it seems like it may be Froyo related.
After the update last night to 2.1. I can only read the files on the sd card. Deleting is not possible. Did a format with the phone and copied all over on the card, no luck. Putting the card in the PC. I can do everything with the files, copie, delete and so on. Then did a format with the pc fat32 and copied all back, again on the phone only read only.
Well I have a problem and need some help. So for no apparent reason I started getting an error with my sd card last night. At the notification bar, it says the sd card is mounted as read only. The phone gives me the option to try to fix it. It tries without success. I have tried resetting the phone and fidgeting with the card...both with no success. Its frustrating cause I can't take pictures as a result and all I see is that error message! Its an eyesore at the top of my screen.
I did a backup using Titanium Backup and Go Backup and after wiping my Motorola Defy, tried to restore apps, contacts etc. The problems I encountered were:
1) Go Backup can't recognize backup directory on SD card for some reason. 2) Can't move apps to SD. An error occurs: "Move Application: Failed to move application. There is not enough storage left." Needless to say, I have more than enough storage.
This is was I encountered by far, although I believe these are just a small part of the symptoms for a single problem. Maybe its because there are no permissions, or moving apps is impossible because of an existing app files on the SD card.
What is the actual cause for this? Or is there a tool to fix the permissions on the Defy?
I had a problem with my sd card, currently my device a lower entry lenovo A369i.
Few days ago i insert the sd card through my phone and it works perfectly. But a few hours ago while i operate my phone as usual and want to open gallery then the all media inside gallery was dissapear..
My Evo is rooted, but I have lost my recovery image. Attempts to re flash recovery via ROM Manager and ADB both failed. I now have a task bar message saying the card is mounted read only. I put it in an adapter, plugged into my PC and ran Check Disk, which appeared to restore R/W status. I then put it back in the phone, rebooted and tried to flash a new image with ROM Manager, I have the read only issue again. I still have root, root apps still receive SU permissions, but I have no nand access and cannot re flash CWM or Amon.
i took my sd card out (before i realized my pone was on) and i put it back in and get "Blank SD Card" even though i have a bunch of stuff on it. How can i fix this or format it? because i really want to use my camera but the phone wont format it! i click format and nothing happen!
If I format my card to ext3 will the phone be able to read it. I want to make a sym link to the internal storage on the sd card so all the apps will hopefully be able to use it. But fat32 doesnt support symbolic links...
My new HTC desire is unable to read or write to my 8GB SD card which was previously inside my HTC HD touch. Why is this? I've swapped the SD cards around - i.e. the 4 GB SD card which it came shipped with is now inside my HTC HD touch It doesnt have a problem reading or writingto the 4 GB SD card that it came shipped with. I would prefer not to have to format the card
Update my Desire to 2.2 yesterday now everytime i turn the phone on i get an error message saying: Mounted ReadOnly. The SD card has an unexpected problem. Tapping.....(cant read the rest of the message) Can anyone help with this. The only way i can access my photos or music is going via a file explorer.
I just received in the post a new class 6 microsd card 8gig. Now, when I remove the the card I got with the phone, I first unmount it in the settings then physically remove it. I get notifications telling me this too. When I install the new card nothing happens and I get no notifications.
I just flashed to skyraider 2.5.2 and I am now getting a "SD card is mounted as read only" error. When I click on it in the notification bar it reloads the card and usually works after that but occasionally it will take several tries. This happens every time I reboot my phone.