Android :: How To File Operations Works In Android

Mar 17, 2010

I was wondering how the file operations works in Android. As in J2ME it has FileConnection class that takes care of most of the File operation tasks.. and it FileConnection doesn't support Android, what is the best way to accomplish the File Operation tasks? I would appreciate if someone could send me some code snippet:

1) Create a Directory( check for its existence first, if not then create it) 2) Create a File in the newly created Directory 3) Write data into the file 4) Read from the file 5) Delete the file.............

Android :: how to file operations works in Android

Android :: File Operations Extremely Slow On Emulator - Totally Stuck

Jul 19, 2010

I am finding that file operations are extremely slow on emulator. The same operation which takes less than a few seconds in a real device, takes minutes on an emulator. I am using a ubuntu linux machine with 2.4Ghz CPU, 2 GB Ram. I would really appreciate any help in resolving this. I am totally stuck due to this.

View 2 Replies View Related

Android :: KLM File That Works In DDMS

Oct 19, 2009

Could anyone upload a small example file that will work? Every file I've tried fails. Is this function completely broken? All attempts result in no points being listed. No errors reported.

View 4 Replies View Related

Android :: Do Network Operations In Appwidget?

Aug 22, 2010

I'm developing a Android AppWidget for my application. For updating my appwidget I need to download data from network. But when I try to do that in onUpdate method, my appWidget is killed by Android system. I learnt that time consuming operations can't be done in receivers so I launched a service from onUpdate method and launched a thread from that. But still the problem persists.
Can anyone please let me know how to do network operations in Appwidget?

View 1 Replies View Related

General :: File Browser Works Over Subnets?

Feb 17, 2013

I've been trying to set up a tablet to connect to Windows shares on the companies domain - all legitimate. I have been asked to look at their use within the company.

It's a standard Server 2008 based domain.

The main problem I am having is that the wireless is a different subnet to the main network.

The file browsers I have tried so far are not apparently capable of routing over subnets - due to smb (which the browsers use) not being a routable protocol so I am told.

The question is are there any Android apps that uses IP Routing to find shares rather than SMB.

I hope the above makes sense. I am going off what I have been told. I can connect to shares on the wireless subnet itself so this seems to all make sense to me.

Are there any such apps?

View 2 Replies View Related

Android :: Handling Expensive Operations In UI Thread

Sep 16, 2009

OK I'm reading this page:

The code is as in the example (see below). In my application, the worker thread has done loading of large bitmaps, and I need to notify the UI thread the filename of the bitmap that was loaded as they get loaded. How can I notify the UI thread of the filename of the bitmap just loaded? I can see anyway to for updateResultsInUi() to be able to take a parameter from the example below.

public class MyActivity extends Activity {
[ . . . ]
// Need handler for callbacks to the UI thread final Handler mHandler = new Handler();
// Create runnable for posting final Runnable mUpdateResults = new Runnable() { public void run() { updateResultsInUi();
} };
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
[ . . . ]
} protected void startLongRunningOperation() {
// Fire off a thread to do some work that we shouldn't do directly in the UI thread
Thread t = new Thread() { public void run() {
mResults = doSomethingExpensive();;
} };
} private void updateResultsInUi() {
// Back in the UI thread -- update our UI elements based on the data in mResults
[ . . . ]

View 5 Replies View Related

Android :: Stop Threads With Long Operations?

Aug 28, 2009

Android experts, I have a tricky question that I would like some advice on. code...

View 8 Replies View Related

Android :: Composite Operations In Droid Canvas?

Mar 31, 2010

I'm just starting with Android development and I'm coming from JavaScript/HTML world so I'm currently investigating the possibilities of the Android SDK.

The HTML 5 canvas supports composite operations (See here).

Is this possible in an Android Canvas? I scanned the API of the Canvas class but couldn't find anything useful. I need at least the composite operation "source-in" or (if this isn't possible) "source-atop".

View 3 Replies View Related

Android :: JUnit Testing Database Operations?

Oct 18, 2010

I'm developing an Android application with database storage.

I want to test some classes that I use to access database.

I've found ActivityInstrumentationTestCase2 to test Activities but I haven't found anything to test classes.

How can I do that? I haven't used jUnit before.

View 1 Replies View Related

Android :: Low Level Operations With SD Card On Droid?

Nov 13, 2010

Is it possible to have low level access in Android with Java/NDK to create for example card scanner like scandisk or card defragmenter? I move a lots of stuff around my card and it gets fragmented quickly. I have experience with FAT32 defragmenting on Windows, but I'dliek to do this on Android.

View 2 Replies View Related

Android : Some Tutorials About Operations On Droid Emulator?

Mar 6, 2010

Can any body give me some tutorials about operations on the android emulator ?

View 2 Replies View Related

HTC Incredible :: Bluetooth File Transfer Works Perfectly With Mac

May 15, 2010

In case people hadn't tried, it appears BT file transfer works perfectly with the Incredible. I paired it with my Macbook with no issues and then was able to send over a file to my Incredible via BT. Came across perfectly fine. Goes in the sdcarddownloadsbluetooth folder.This phone just keeps getting better.

View 20 Replies View Related

Android :: Avoiding Float Operations In Game Design

Jun 8, 2010

I've read this in a few articles, that one should avoid floating point operations within the physics update of a game.

But how do you really achieve this? Surely all half decent games are going to involve this kind of maths?

Does it mean, convert all your variables to int, or use double instead, or simply just cut it out as much as possible?

View 9 Replies View Related

General :: Galaxy S4 Android 4.4 / Program Crashes Operations

Nov 27, 2013

I've downloaded the android 4.4, but when i'm going to settings, security, the program crash the operations.


I want to mark the option install apps out of play store.

View 1 Replies View Related

Android :: Need Droid Apps That Alter Normal Phone Operations

Feb 19, 2010

So i was wondering if its possible to for an application that i would write to be constantly running in the background and alter regular phone operations. For example this could be something like as soon as you receive a text from anyone you forward it automatically to another number. Is something like this at all possible? Just to be clear I don't want to solve that particular problem through some other means, just want to know if apps can accomplish that. Also if that is possible is it possible for an app that i write to alter more immediate and instant things, like an incoming call.

View 1 Replies View Related

Android :: Design Application With Multiples Activities And Operations Running In Background?

Nov 22, 2010

I am designing an app that will have some activities separated in tabs. Some of them will have to perform tasks in the background will the user is in another tab. What is the best strategy for designing an app like this? I was thinking about using a service but it can be killed by android dalvik, isnt it?

View 1 Replies View Related

Fake Permissions And Unauthorized Operations?

Apr 11, 2014

I do a lot of Android app testing. I use my regular phone, where I have my contacts and my regular gmail account. I never used a credit card on this account. I mostly use APK files to install the apps. I have 2 questions:

1. can an app display some permissions when installing, but have others hidden permissions ?

Example: instal APK file > says permissions "Network access" and that's it.

Can this app also read my data or make phone calls, even though those permissions were not displayed ?

What is I use an app to display ALL permissions ? Can it really display all or is there an way to still have hidden permissions ? I use Android 2.3.7 root and 4.1 no root.

2. Can an app make unauthorized hidden operations, like place phone calls or send texts or steal my gmail password ?

Like I said, I never used a credit card, so at least that's not a problem. But I have my SIM card - can an app place a value added call or SMS (I don't know the exact English term - expensive call), without me knowing about it ?

Or compromise my Gmail account ? I have an alternate email for recovery.

View 1 Replies View Related

General :: How To Get Tab Back To Normal Operations

Nov 1, 2013

How to get my tab back to normal operations.After changing fonts it req for restarting and it's just hanging at booting process. Try to recover but it doesn't work. Then i try to use install 86vebc ROM by using CWM v6.0.2.8 and now it's keep on entering CWM again and again even after rebooting.I only able to give the specification as below because i couldn't find the exactly brand or model for my tab.

View 2 Replies View Related

Android :: Hide Soft Keyboard On Activity Without Any Keyboard Operations

Oct 13, 2010

I have a tabbed view with one Activity per tab, and when I switch from the first tab, which has a TextView, to the second tab, which only shows a clickable list, the soft keyboard is still there. I want it to go away.

I tried this:


But this does not work, because there is no relevant view to provide, as there is no View on the screen that takes keyboard input.

View 1 Replies View Related

Android :: Importing Contacts To The Device - Contacts Operations Are Very Slow

Mar 23, 2010

I have some questions concerning importing contacts to the device, which is extremely slow.

First of all, if you delete all your contacts, google sync will restore it very quickly. However, when my app is adding contacts to the device, it's very slow (a few contacts per second). Even if I add almost empty contacts (with name only), it is a time-consuming process.

If I turn google sync off, importing 5000 contacts can take 1-2 hours (on HTC Magic). When google sync is on it can take up to 24hours. And this happens despite the fact, that application for the whole time is in the foreground, device is connected to charger and screen is on. I checked the logcat to make sure my app is adding the contacts the whole time, and it is.

I tried different methods and different devices. The results differ of course, yet manually adding contacts is always significantly slower that google sync. Is there any way that I can speed up the process? So that importing 5000 contacts will take less than an hour.

View 7 Replies View Related

Android :: Does The Dalvik File Format - .dx - Support More Instructions Than Java .class File

Apr 17, 2010

Is there anything the Dalvik VM supports (in terms of bytecode) which is not used currently because the .class files don't have it?

As an example, if people would write their own Source-to-DX converter for their functional language XYZ, would they be able to implement e. g. full tail calls although the .class file does support tail calls only under certain circumstances?

View 1 Replies View Related

Android :: Attaching Txt File While Email From Internal Package File Storage

Jun 8, 2010

I am successful in creating file using openFileOutput(). and can read the file using openFileInput().

I am able attach file from external storage sdcard while emailing the same using getExternalStorageDirectory as sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+Environment.getExternalStorageDirectory()+"/ zibra.txt"));

But while trying to attach file from the openOutputFile stored area using sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+ getFilesDir() + "/zibra.txt"));, resulting emptied file emailing.

My file is stored in "/data/data/com.example/files/zibra.txt".

what is going wrong in it?


View 4 Replies View Related

Android :: PackageManage - Couldn't Copy Package File To Temp File

Jan 12, 2010

We are suddenly unable to install our app on G1 developer phones with 1.6. Works perfectly on emulator. When installing the app we get:

Installation error: INSTALL_FAILED_INSUFFICIENT_STORAGE Please check logcat output for more details. Launch canceled!

And logcat:

PackageManage: Couldn't copy package file to temp file.

What does this mean? We checked that there is actually room enough on the phone.. We tried reverting the code to a revision that worked previously, but are getting the same error.

View 5 Replies View Related

Android :: Playng Video File Present In Local File Syste

Sep 6, 2010

How to play video present in local file system (ex:in res/a.3gp) using VideoView .I am getting error as Video cant be played.Can any one help me in sorting out this issue?

View 2 Replies View Related

Android :: Unable To Play File When Set Data Source To Sd Card File

Apr 13, 2009

I am trying to play file which is stored in SDCARD in emulator. I have Linux O/S. So i need to provide command in run configuration. I am providing following parameter.

-sdcard /usr/android/sdcard/mysdcard.iso -audio oss [i]

The following is my code to play file.

try { mMediaPlayer.setDataSource("/sdcard/test_cbr.mp3"); mMediaPlayer.prepare(); // Giving error. mMediaPlayer.start(); }

View 4 Replies View Related

Android :: Is It Efficient To Use Text File Or XML File To Store Static Data

Jul 31, 2009

I have some reference data in a text file (~5MB) that I want to use with might android application.The file is of the format:
1|a|This is line 1a
1|b|This is line 1b
2|a|This is line 2a
2|b|This is line 2b
2|c|This is line 2c

What I want to know is the most efficient way (less memory, fast, size etc.) to use this file within my application.

a.) Should I save the file as a raw resource and open and read the whole file whenever I need a certain line.
b.) Should I convert the file to XML and use XPath to query the file when ever I need to look up a value
<!--sample XML -->
<line number="1">
<entry name="a">This is line 1 a</entry>
c.) Should I just copy & paste the whole file as a static string array in the application and use that.
[EDIT] I will also need to search this file and jump to arbitrary keywords e.g. "line 1a".

View 4 Replies View Related

Android :: Resize Large Bitmap File To Scaled Output File

Jul 26, 2010

I have a large bitmap (say 3888x2592) in a file. Now, I want to resize that bitmap to 800x533 and save it to another file.I normally would scale the bitmap by calling Bitmap.createBitmap method but it needs a source bitmap as the first argument, which I can't provide because loading the original image into a Bitmap object would of course exceed the memory (see here, for example).Is there a way to read a large image file with 10MP or more and save it to a new image file, resized to a specific new width and height, without getting an OutOfMemory exception?I also tried BitmapFactory.decodeFile(file, options) and setting the Options.outHeight and Options.outWidth values manually to 800 and 533, but it doesn't work that way.

View 4 Replies View Related

Android :: Private Signed Keystore File From Previous Apk Release File

Feb 2, 2010

I have created the private signed keystore file using eclipse and i have released the apk files in android market website. after some days we got some issues from users and we have fixed the issues but i don't have private signed keystore file. while making the apk file i need to use previous version release used private signed keystore file. Is there way to get private signed keystore file from previous apk release file?

View 1 Replies View Related

Android :: App Works To Stream When Using DI.FM

Nov 6, 2009

I just got back from the Verizon store. I was checking out the Droid... I popped open the browser and went to DI.FM.

Digitally Imported - Addictive Electronic Music

I tried all 3 public streams (MP3, Windows Media, AACPlus), and nothing. I asked the data tech guys at the counter and they said there might or will eventually probably be a app that will work with DI.FM.

So anyone checked into this? Anyone gotten DI.FM working? I'm especially interested to see if I can get the premium subscriber channels to work. The phone is pretty damn sweet and right now the only thing holding me back is the fact I can't stream my favorite internet radio station.

According to the specs of the Droid, it supports AACPlus streams. This is big! Currently it's next to impossible to stream AACplus encrypted streams on windows mobile.

View 4 Replies View Related

Android :: How Does The Bluetooth Works

May 22, 2010

Can someone explain to me the concept behind using bluetooth. my project in my studies is to make an android app using bluetooth, SQLLIGHT and google app, the app itself is a very easy one but i just dont get the tools i need to use :

How does the bluetooth works?
Is there a simple example ?
The concept behind android GUI (i allready nade one but i think i am not fully understood his power)?

I am using v 2.1

View 1 Replies View Related

Copyrights 2005-15, All rights reserved