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POworking with large images in android
 

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  1. POworking with large images in android
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    <p>I have an app in android in which I'm working with really big images<code>(640x480)</code> and slightly bigger.This are actually pictures taken with the camera, then are edited, after that are saved to <code>sdcard</code> and finally uploaded to a server. But the issue that I'm facing is <code>VM memory exceeded</code> when working with <code>bitmaps</code>.</p> <p>I'm doing something like this:</p> <p>In the first activity I'm receiving <code>the bytes from the camera</code> and create a <code>bitmap</code> which is edited and then saved to <code>sdcard</code></p> <pre><code> BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 2; options.inDither = true; byte[] imageData = extras.getByteArray("imageData"); myImage = BitmapFactory.decodeByteArray(imageData, 0, imageData.length, options); Matrix mat = new Matrix(); mat.postRotate(90); if(myImage !=null){ bitmapResult = Bitmap.createBitmap(myImage.get(), 0, 0, (myImage.get()).getWidth(), (myImage.get()).getHeight(), mat, true); </code></pre> <p>in <code>onPause()</code> method I did this:</p> <pre><code> bitmapResult.recycle(); bitmapResult=null; </code></pre> <p>In my second activity I'm reading the file from <code>sdcard</code> and display it on the screen.Why?I have my reasons:</p> <pre><code>File f=new File("/sdcard/Images/android.jpg"); BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inTempStorage = new byte[16*1024]; o2.inSampleSize=8; o2.outWidth=100; o2.outHeight=100; try { x = BitmapFactory.decodeStream(new FileInputStream(f), null, o2); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(x != null){ myImage.setImageBitmap(x); } </code></pre> <p>And did the same thing in <code>onPause()</code></p> <pre><code>x.recycle(); x=null; </code></pre> <p>All this didn't worked and after taking a few pictures my app crashed.</p> <p>I tried using <code>WeaakReference</code> instead of <code>bitmap</code>:</p> <pre><code>myImage = new WeakReference&lt;Bitmap&gt;(BitmapFactory.decodeByteArray(imageData, 0, imageData.length, options)); </code></pre> <p>And still nothing....the same error....<code>out of memory</code>.</p> <p>Has anyone any idea?</p> <p>P.S: I also tried to call <code>System.gc()</code> but with the same result!</p> <p>So please help me!</p>
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    3. COVariables/Objects Means Bitmap, Drawable etc., and set null on last part of the activity.
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