Android :: File System Access Triggers - Listener On Android Devices
Feb 19, 2010
I'm looking for some ways to intercept File System Access operations like Read and Write a file. So that i can catch these "events" from an Android App. (background service for ex.). I don't have found any possible "events" and "listener" that i can use to listen to file system access on the device. So, i'm thinking about developping a native application (with the Android NDK) which will intercept these file system "events" and send them to a background service.
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Sep 25, 2013
My objective is to create a text file in an android file system.
Using java language, I am creating an app. It has a screen with a table of 3columns. Each time a user enters the table row and click on Submit button, the row entry should be created as a separate comma-separated file on an android device. So each time when the table gets updated with new entry and clicks a submit button, a new file is getting created on the device file system. So I am looking for the file connectivity to the internal device memory where I could open the files and access it.
I have done the same in Nokia mobiles using J2ME. But for Android, I am not able to find the device file path.
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Jul 2, 2010
Ok just got my EVO yesterday. This is not only my first android phone, but my first smart phone as well. I'm fairly savvy when it comes to computers and techy stuff, but I do have what sounds like a ridiculous question. I bluetoothed some files (songs and pictures) from my old phone to my EVO. It acknowledged getting them and indeed I was able to play them from the notification area after receiving them. However, now I cannot find anyplace to 'browse' the phone folders or the SD card folders so I can find and utilize these files. How do you access the SD card or the file system?
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Sep 4, 2010
Phone: UK Galaxy S Issue: Recovery boot error message in red writing
Multicsc : can not access to / system/csc/VOD/system/
Background: I have been trying to root my phone from information found in a youtube video. All went well and the little ninja bloke with the sniper rifle was in the app list. Tried installing busybox and was told that the phone was not rooted�..
I think I ran the root application again and at some point I started getting this error message when in recovery. I have since run the one click root method to unroot the phone and the little nija dude is no longer there. Since I rooted the phone it will no longer connect to my wireless network, it finds the network and attempts to obtain an ip address. After a few min it times out and tries again. When I load the phone recovery the error message is still present.
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Sep 16, 2009
I'm having a problem where I am able to update the location in the Android Emulator from the Eclipse DDMS exactly once per time an activity is loaded, but no more.
I discovered the problem in my application where Activity2 (which accesses the GPS) is started by Activity1 (which doesn't do anything particularly interesting); when Activity2 is started, I can update the GPS position using the Manual input in Location Controls in the DDMS and everything works fine. However, then I get a LogCat message "TTFF: XXXX" where XXXX is an apparently random number, and then the GPS will no longer update. However, if I click the Back button in the emulator to return to Activity1, and then use Activity1 to restart Activity2, I can enter a new GPS location. But, I can't enter a second one; tries to do so result in no apparent action. My application works perfectly well on a real device with a real GPS signal.
To test things further, I closed and reopened the emulator, immediately closed my application (from Activity1, which doesn't do anything besides load an XML layout and attach an onClick listener to a button), and loaded Google Maps. I observed the same behavior here; I could send one position that Google Maps would respond to, but any subsequent attempts to update position fail. When I close Google Maps and reopen it, I am able to send exactly one more location update from DDMS.
The distance between my subsequent location updates is usually 0.02 degrees, but I have tried it with up to 5 degrees also. My application does not use ACCESS_MOCK_LOCATION because I want to switch back and forth between testing on a physical device and testing on the emulator without having to update the manifest for each build, plus it seems like setting a permission for my application shouldn't have anything to do with Google Maps on the emulator.
I would try loading up a GPX path, but the DDMS seems broken there too: http://groups.google.com/group/android-developers/browse_thread/threa...
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Oct 4, 2011
I'm making a code and I want to send a mp4 file to another Android device. I have reached to connect both Androids via Wifi and write from one a simple for cycle from 1-20 and the other Android device reads and displays the number that is sent.Here it is the interesting part of the "sender":
Code:
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
Log.d("ClientActivity", "C: Connecting...");
Socket socket = new Socket(serverAddr, port);
connected = true;
[code]...
I want to send a file from one device to another instead of an int. How can I make this?
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Sep 9, 2010
I saw some application that can use the "system" camera instead of having just a blank camera preview? ie, the camera preview is the same as the default android camera application with full control. how do i access that?
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Apr 26, 2010
I displayed map and on top of map, I displayed a number of overlay Items(Markers). Clicking on overlay Items or markers will do some action. But the problem is when I click around the marker, means outside the marker, at that time also, the event triggers. I want to restrict that exactly when I am clicking on the marker, event has to take place. I am doing the event in opTap() method.
How can I restrict the event triggering to exactly when I click on the marker.
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Oct 28, 2010
Is there any way to access the value (any constants) from Android.mk file to my java file.
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Jan 31, 2010
I have a Java-JNI-App which must run in 'system' user mode, but once switch to that, my App then cannot access /sdcard.
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Jan 20, 2009
I am modifying the Settings application, and needing to access the system properties. By using android.os.SystemProperties.get, I can read the system properties. However, I can not set the system properties back with android.os.SystemProperties.set. This function has no return and the system properties never get changed. Why? Is there any permission required?
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Jul 21, 2013
I'm wondering is there a way to access system files of Android (JB version) and make changes from Windows? Is it possible do that in fastboot mode, without switching on?
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Sep 12, 2010
Does the X use a FAT32 file system? Is there any way to change this? I'm asking because I have a 4+GB mkv file I want to put on it, but I'm getting a message telling me its too large for the file system. If no way to change, then can anyone suggest a way to make this file small enough to fit?
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Aug 30, 2013
How can i know if a phone is rooted or not. If yes should i grant any permissions to those files or can i directly access those files/folders.
I need this info for my app.
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May 20, 2013
My Ainol Novo 9 Spark can't write on my extSD/USB devices. I tried to format/remount but nothing works. The SD Card is working fine in my Galaxy Note.
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Jul 21, 2013
How to make android 4.0.4 devices rooted by superuser?
I open my superuser:
downloading manifest okay
parsing manifest okay
latest version 3.1.1
checked install version 3.1.1
fixing database okay
unpacking sutools okay
check current install path= /system/xbin/su
Downloading new binary okay
gaining root access fail
I have my device rooted by means of UnlockRoot, at first I think the version of superuser is low. So I download Superuser-3.1.3-arm-signed.zip , exact it and replace the old version superuser and su .
I click the root on the software and it seems that everything work. But the fact is that I can't find superuser in my android devices and manually install superuser by myself. And then the phenomenon above appears. It seems that I have rooted the devices and I can't get root access. It is more dangerous than I don't root the devices.
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Nov 21, 2010
i had one that was very seemless and felt much like windows xp sort of. but i factory defaulted my device the other day and now it gone and oddly i don't remember the name of it.
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Mar 2, 2009
Am I able to hook file system on Android?that means before a file is opened by other application, a registered function by the third application is invoked, and in the registered function, it can decide whether permit other application to open that file.
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Mar 20, 2009
I need to save some persistent data (byte array) in my application.I decided to write these data into a file on the Android hardware.But I cannot create a file under /system/ or /data/.Can any body tell me under which directory can I create a file to save my data except SDCARD(Because We cannot suppose every Android has a SDCARD)?
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Sep 1, 2010
I am wondering that how android is providing security against corruption of data in file. I also want to know about security model for Shared Preferences, Sqlite datbase etc. storage methods.
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Jul 22, 2010
I am trying to read system logs in my code to generate something like an error report. Similar to adb logcat, but in a programming way.
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Oct 8, 2012
Let's say you don't have internet access at the moment. Let's say all you have is fresh install of CyanogenMod 9, which for some reason, does not come with a File Manager :
Let's say you have an apk file on your SD card. How would you install the apk file? Terminal emulator, using which commands or another way?
By the way, ASTRO File Manager vs. ES File Explorer, which one and why?
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Apr 20, 2009
Google applications do it, and apparently it used to be part of the public API (via android.os.SystemProperties.) How are we supposed to enable/disable sync on the phone? Disabling/enabling roaming is easy, but I'm beating my head against the wall trying to find a non-hack method for disabling auto-sync (much less the granularity that would actually be nice.) Is this intentional by the framework team? Is it a whoopsie that is planned to be changed later?
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Apr 10, 2010
I was curious as to whether there is an app that allows you to share files and documents with other android devices. I thought bump would do it but that is just for sharing contact info.
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Apr 30, 2009
I am developing a photoshop application for the G1 where you can apply different filters to your pictures stored in the pictures folder. So I use a gallery and a cursor to select the picture I want to manipulate, copy the picture to a bitmap so I can perform some filter operations and afterwards save the new bitmap as a new file to the phone. So I figured out that there are basically two options I have to save the image. One is to use the MediaStore.Images.Media.insertImage() method, which generally would work, but I don't want a thumbnail to be created. The second option, which I actually use, is to use an OutputStrem.
import android.provider.MediaStore.Images.Media; import android.content.ContentValues; import java.io.OutputStream;
// Save the name and description of an image in a ContentValues map. ContentValues values = new ContentValues(3);
values.put(Media.DISPLAY_NAME, "road_trip_1");
values.put(Media.DESCRIPTION, "Day 1, trip to Los Angeles");
values.put(Media.MIME_TYPE, "image/jpeg");
// Add a new record without the bitmap, but with the values just set.
// insert() returns the URI of the new record. Uri uri = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, values);
// Now get a handle to the file for that record, and save the data into it.
// Here, sourceBitmap is a Bitmap object representing the file to save to the database. try {
OutputStream outStream = getContentResolver().openOutputStream (uri);
sourceBitmap.compress(Bitmap.CompressFormat.JPEG, 50, outStream);
outStream.close(); } catch (Exception e){
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Apr 19, 2010
How can I copy files to the file system (place) in android? How can I access it?
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Apr 15, 2009
I have an application that I want to be able to use the userid: android:sharedUserId="android.uid.system", I need to sign the .apk file with the same certificate as the built in system applications, such as the 'Settings' application. I've located the keystore file in my build directory which is: cacerts.bks, and I have the password for this. What I seem to be missing in order to sign my .apk file is the alias fo the keystore. Does anyone know what the alias is? Or is there an easier way to do this that I'm missing.I know this not a standard thing to do, and is perhaps a hack, but I have a client requirement to meet.
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Sep 6, 2010
I'm trying to re-partition an SDCard on Android, with root access. What I'm trying to do is resize the 5.9GB partition into 3GB, and then make an EXT partition with the remaining space. I can think of two ways to do this, but I'm a bit stumped in doing either of them: 1) Cross-compile GNU parted, and run it on Android to modify the filesystem in place. This would be my preferred method, but I've been trying to statically compile parted using scratchbox and haven't had much luck, and I haven't been able to dynamically compile for Android in scratchbox either. 2) Directly modify the 512 byte MBR using some utility on my computer, and then dd the file on Android. I have a tool to view the MBR (mbrwiz), but I don't know how to edit it. Does anybody have any suggestions for either, or possibly a third route?
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Dec 4, 2013
how to know which type of file system does my android device using ?
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Apr 17, 2012
I had format my phone's system through cwm.
now i want to restore it but it just stuck when i power on my phone.
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