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.

Android :: Resize large bitmap file to scaled output file


Android :: Rendering Scaled Bitmap With High Fps

Apr 15, 2010

I'm in the following situation: I have a large bitmap (~1280x1024) that I'd like to display on screen, scaled down in a view that fits the phone's screen (~480x320). This bitmap is frequently updated (couple of tiles per frame at 15 FPS). I first wanted to implement the rendering with a SurfaceView but figured out that all the scaling would be done in software due to limitations in the Android SDK. The second solution would be to load and render textures in an OpenGL context. Would that accelerate the resizing? If yes, isn't the cost of loading textures going to offset what I'll win on the scaling side?

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Android :: Alternatives To Create Scaled Bitmap When Adding 3D

Dec 4, 2009

I have a problem - I am writing an application that displays up to 12 images on screen, and moves them around, plus reads touch events. I am using a sample code I found, and it works great. Now I need adding 3D - meaning emulating the objects moving in the Z axis, too (in/out of screen). To do this, I need to resize the images as they move. To test this, I changed the following line in my onDraw (Panel) code: canvas.drawBitmap(bitmap, coords.getX(), coords.getY(), null); to: Bitmap bmpScaled = Bitmap.createScaledBitmap(bitmap, 112, 112, false); canvas.drawBitmap(bmpScaled, coords.getX(), coords.getY(), null); Which works, BUT - movement on screen, plus response to touch events becomes real Jiggly. Checking the log I see that every call to createScaledBitmap causes garbage collection of around 90mS, which causes the total app to respond jiggly. Tried preparing 20 sized bitmaps beforehand, but since that moves the calls to those createScaledBitmap to the beginning of the app - it takes forever to load. Can you think of any workaround or other way to achieve the scaling effect?

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Android : Way To Output LogCat To A File?

Jun 30, 2010

I've been told it's a command line option. But Eclipse's Run!Run Configurations...!Target!Additional Emulator Command Line Options field is already occupied with hen where do I write it, and how (i.e., is the syntax even correct)? I need to output only a filtered tag, not verbose. ("MessageBox" is my TAG. Again I don't know if any of this punctuation is right, or even where the command goes.

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Android :: Large Database File

Aug 14, 2009

Is it a problem that i put 17 Mb database to /data/data or should i put it to /sdcard?

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Android :: Resuming Large File Download

Sep 17, 2009

I am trying to implement the functionality to resume a large file download, but have not found how to start downloading from a position that is not at the beginning of an InputStream.I am currently using the InputStream.skip() method to go to the position where I want to resume the download, but have found that this method actually reads all the data over the network and then throws it away.I would appreciate some help in learning the correct way to start reading from the resume offset of the internet file being downloaded, so that I can avoid wasting the phone network bandwidth, and also avoid the extra time delay caused by re-downloading all the data that was already previously downloaded.

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Android :: Large File Upload Application

Mar 16, 2010

I need to send files as large as 80 MB, but usually in the 15-25 MB several times every day. I use YouSendit, Megaupload and the like on my laptop. Would be a HUGE help if I could simultaneously upload from my Android phone. It has to be able to handle a folder. Basically, a folder full of pictures.

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Android :: Large Data File / How To Deal With It?

Dec 10, 2009

My application needs to intensively manipulate (read-write) on some structured text data.The size of the data is significant 1Mb. And there is initial data available for the user to start with.My idea is to put this data as a file in the .apk. Then, on initial application launch to read this data and populate Android SQLite database with it. Then just work with this database. But after the database is populated the data file is no longer needed. And I'd like to remove it to free some memory. Alternate approach is to work with this data file instead of SQLite database. But I assume SQLite would work a magnitude faster then i/o on my data file..

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Android :: Download Large File From Internet

Apr 14, 2010

I'm trying to download large file from Internet (>20Mb)

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Android :: Deleting Files Created With File Output Stream

Jul 20, 2010

I'm developing for the Android platform.

My app creates a temp file with a simple call to:

FileOutputStream fos = openFileOutput("MY_TEMP.TXT",Mode);

It works fine because I can write to it and read it normally.

The problem is that when I exit from the app I want to delete this file. I used:

File f = new File(System.getProperty("user.dir"),"MY_TEMP.TXT");
f.delete()

But it always returns false and the file is not deleted.
I have tried

File f = new File("MY_TEMP.TXT");
f.delete();

And it does not work either.

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Android :: Specify Package Name And Output Folder From - Generated Ant Build File

Apr 13, 2010

I dont want to hardcode the name of the package or where it lives when building an Android project with ant. Im using the build file generated by Android. What properties contain the output folder (bin) and package name (e.g. package.apk) ?

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Android :: Recording Using MediaRecorder API-output File Size 0 Bytes

Jul 11, 2010

I've tried recording video using MediaRecorder API but the file that gets saved each time is of 0 bytes.
I use the MediaRecorder recorder = new MediaRecorder(); ad then recorder.setVideoSource . . .recorder.prepare() to generate the preview and when the user clicks record, i say recorder.start() but the file recorded is of 0 bytes. And after some time, recorder.stop() -on user click that is.

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Android :: Download Large File From Network To SD Card

Nov 2, 2010

I'm trying to download a large .zip file from a web server but I have a weird behaviour, the description is:

- I'm executing the code in the device emulator, API level 3 (version 1.5) with an SD card of 512MB. I start the device with "Wipe data user"

- The length of the size from conexion.getContentLength() is 7012725

- The server address is localhost (10.0.2.2), but I've tried with an external server and the behaviour is the same. I've double checked that I can download the file through a web browser.

- I have these permisions in the manifest file:

CODE:.............

The error:

- It starts downloading the file, I can see the text 10, 20, 30, 40, 50 and then it stops at 60. - After a while, the emulator reboots itself.

Workarounds:

- About the possible wifi lock, what I've done is add this permission "android.permission.WAKE_LOCK" and then this piece of code, but with exactly the same behaviour:

CODE:.............

Here is the code, that it's being executing in a separate thread:

CODE:.............

more log description:

CODE:................

Could anyone try my code and download a zip file with size round 8MB? Does it works for you?

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Android :: How To Write Bitmap Out To XML File

Jan 21, 2010

Might sound crazy, but it's what I need to do. I want to take a Bitmap object and use the XMLPullParser/XmlSerializer to write this to a flat file. Obviously I will need to read the XML tag back into a Bitmap object.So somehow I have to turn my Bitmap into a String and then turn that String back into a Bitmap. I will do some searches on Base64 to see if I get any good examples.

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Android : Need To Create A New File ( To Be Sent ) From A Bitmap

Jul 30, 2010

I have a bitmap "picPrev" which I got from my online server. I want to turn it into a file so I can send it. I was exploring this method. code...

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Android :: Out Of Memory Exception On Transferring Large File To DataOutputStream

Apr 28, 2009

I need to post some files on my server, it works fine for small files like 1mb but when i try for more than 4 mb ; it force close because of memory overload.

Have a look on my code below:

CODE:.................

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Android :: Break Large HTML File To Small Ones In Java

Oct 7, 2010

Presently am displaying html file in web view and my emulator size 1024*600. If the html file is large then user is scrolling down to see bottom part of the html. I Need to break these html file in equal parts so that it fits exactly in my screen size. I don't want User to Scroll Down but load remaining part (next page) next time.

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Android :: Read File Into Java Bitmap?

Nov 4, 2010

I know how to read a bitmap file into a byte array. How is the byte array then converted to a Java Bitmap?

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Android :: How To Save A Bitmap Instance To A Bmp File?

Jun 27, 2009

How can i save a Bitmap instance to a *.bmp file?Anyone knows? Is it strange that we can only save a bitmap instance to a png or jpg file?

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Android : Why Does This Phone File Output Stream Throw A Null Pointer Exception?

Aug 16, 2010

There does not seem to be any Android manifest permission that needs to be set for file io. Code...

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Samsung Galaxy I7500 :: LogCat - Cannot Get Output File

Sep 28, 2010

This is one thing I have yet to figure out. For some reason I just cannot get the darned thing to output to a file. I found this link Android Debug Bridge | Android Developers and it has lots of commands. I can get logcat to appear on the screen, but that's about it.

Here is what I am doing:
Start, Run, "C:Derek's phone firmwareandroid-sdk-windows
oolsadb.exe" logcat and poof log appears on the screen.

If I use "logcat -f" it just appears on the screen and disappears is less than a second. Also, no file is to be found (the default file is supposed to be stdout).

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Android :: Load And Draw Partially A Bitmap From File

Sep 13, 2010

I have a somewhat large (i.e. not fit in most phones' memory) bitmap on disk. I want to draw only parts of it on the screen in a way that isn't scaled (i.e. inSampleSize == 1)

Is there a way to load/draw just the part I want given a Rect specifying the area without loading the entire bitmap content?

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Android : Get Bitmap Infomation Before Decode An Image File?

Jun 4, 2009

I want to know an image's width before decode it, so that I can set Options.inSampleSize if the image is too large. Any advice to do that?

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Android :: Write Contents Of Custom View To Large Image File On SD Card

Mar 12, 2010

I have a class that extends View. I override the onDraw method and allow the user to draw on the screen. I am at the point where I want to save this view as an image. I Can use buildDrawingCache and getDrawingCache to create a bitmap that I can write to the SD card. However, the image is not good quality at a large size, it has jagged edges. Since I have a View and I use Paths I can transform all by drawing to a bigger size. I just don't know how to make the Canvas bigger so when I call getDrawingCache it doesn't crop all the paths I am just transformed. What is happening is I transform all my paths but when I write the Bitmap to file I am only getting the "viewport" of the actual screen size. I want something much bigger.

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Samsung Captivate :: Sending Videos Via MMS / File Too Large

Oct 16, 2010

Well, I am sure that at some point in time you all have sent a video but I am trying to figure out why I can't send videos. Last night, I was performing at a night club and I wanted to send the videos to friends and what not so they can hear our singing. However, the video clips are anywhere from 8-20 seconds long and they are not in HD quality but 3gp. Yet it tells me the message can't be attached because it's too large.

Today I had a show, and my brother recorded me and I wanted to send the video out and it still says the same thing. Is there anything I can do? I love At & T but I am wondering does this have anything to do with their Data cap because when I had my Droid X and Incredible on Verizon. I was able to send videos up to 30 seconds long to phones via MMS but I can't send videos on my Captivate. I couldn't send videos either on the Xperia X10, I had, the aria I had, and now the backflip. (I am just using it because I love motoblur for the social networking, not the phone).

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HTC Desire :: Large Mp3 File Unsuccefull Download - Where Is It Located?

Jun 2, 2010

I was trying to d/l a large mp3 file off the internet from my desire (110mb)

It didnt manage to d/l, i was wondering if the part is had d/l is lurking somewere on the sd card, if so where can i locate it?

Ive had a root around looking with Astro but to no avail...

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General :: Automating Script With Output Going To A File With Date And Time Entry

Feb 24, 2014

I'd like to run a simple script once a day to automate fstrim on my /data and /cache partitions with the output going to a file with a date and time entry. The script is easy but I don't know how to automate it. I'm running 4.2.2 on an HTC One X+. I'm rooted and have busybox 1.22.1 installed.

The fstrim script is as follows:

date >> /sdcard/fstrim.log
fstrim -v /data >> /sdcard/fstrim.log
fstrim -v /cache >> /sdcard/fstrim.log

it is located in /data/local/fstrim.sh

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Android :: Read LARGE Sqlite File To Be Copied Into Emulator - Or Device From Assets Folder

May 28, 2010

I guess many people already read this article:

Using your own SQLite database in Android applications: http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/comment-page-2/#comment-12368

However it's keep bringing IOException at

CODE:.............

I'am trying to use a large DB file. It's as big as >8MB. I built it using sqlite3 in Mac OS X, inserted UTF-8 encoded strings (for I am using Korean), added android_meta table with ko_KR as locale, as instructed above.

However, When I debug, it keeps showing IOException at

CODE:..............

I suspect it's caused by trying to read a big file. If not, I have no clue why.
I tested the same code using much smaller text file, and it worked fine.

Can anyone help me out on this? I've searched many places, but no place gave me the clear answer, or good solution. Good meaning efficient or easy.

I will try use BufferedInput(Output)Stream, but if the simpler one cannot work, I don't think this will work either.

Can anyone explain the fundamental limits in file input/output in Android, and the right way around it, possibly?

WITH MORE DETAIL:

CODE:...............

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Android : Best Way To Resize Bitmap

Sep 10, 2009

I want to resize a bitmap and write to a file. what's the best way to do that?

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Android :: Bitmap Image From File Does Not Scale On High Density Device / Display It?

Sep 24, 2010

I have problem with displaying bitmap image on imageview on high density screen (480x800). When the bitmap image loaded from file on sdcard, the image does not scale to fit hdpi screen. On medium density screen it works normal (320x480).code...

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