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POHandling Bitmap loading and disposing probably
 

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    <p>I'm a newbie to monodroid and I have two killers here I wish someone can help me to resolve: </p> <p>I have a monodrid app which uploads an image to a web service, the images comes from the device camera or the Pictures gallery.</p> <p>First thing is I use the following code to take a picture from the device camera:</p> <pre><code>var intent = new Intent(MediaStore.ActionImageCapture); var availableActivities = this.PackageManager.QueryIntentActivities(intent, PackageInfoFlags.MatchDefaultOnly); if (availableActivities != null &amp;&amp; availableActivities.Count &gt; 0) { var dir = new Java.IO.File( Android.OS.Environment.GetExternalStoragePublicDirectory( Android.OS.Environment.DirectoryPictures), "myapp"); if (!dir.Exists()) { dir.Mkdirs(); } _file = new Java.IO.File(dir, String.Format("image-{0}.jpg", Guid.NewGuid())); StaticDataHolder.ImageUri = Android.Net.Uri.FromFile(_file); intent.PutExtra(MediaStore.ExtraOutput, Android.Net.Uri.FromFile(_file)); StartActivityForResult(intent, RESULT_CAMERA_CAPTURE); } </code></pre> <p>And this code to read scaled Bitmap from StaticDataHolder.ImageUri into an ImageView control so the user can confirm weather to use the selected image or not:</p> <pre><code>Bitmap largeBitmap = null; try { image.SetImageBitmap(null); if (Bitmap != null) { Bitmap.Recycle(); Bitmap.Dispose(); } largeBitmap = MediaStore.Images.Media.GetBitmap(ContentResolver, StaticDataHolder.ImageUri); Bitmap = GetScaledImage(largeBitmap); SetImageFromBitmap(image, Bitmap); return true; } catch (Java.Lang.OutOfMemoryError) { return false; } finally { if (largeBitmap != null) { largeBitmap.Recycle(); largeBitmap.Dispose(); } } </code></pre> <p>The second issue is when the user confirm the selected image weather its taken from the camera or picked from the gallery, I create a new Bitmap to be compressed and sent to a web service which I host using the following code:</p> <pre><code>byte[] buffer = null; MemoryStream ms = null; Bitmap bmp = null; ms = new MemoryStream(); bmp = MediaStore.Images.Media.GetBitmap(ContentResolver, StaticDataHolder.ImageUri); bmp.Compress(Bitmap.CompressFormat.Jpeg, 60, ms); buffer = ms.GetBuffer(); ms.Dispose(); bmp.Recycle(); bmp.Dispose(); </code></pre> <p>and then I pass the buffer to the web service method.</p> <p>This code will work perfectly the first time I start the app, But when I try to load a second image I get OutOfMemoryError exception and the image is not loaded.</p> <p>How i can load a Bitmap and dispose it probably so I can avoid this exception?. Please note that every step here is managed via separate activities:</p> <p>1.Take or choose a photo activity. 2.Confirm the selected photo activity. 3.Load the selected photo and send it to the web service activity.</p> <p>As far as I know the activity is disposed when finished so by default all resources used in it will also be disposed but in my case its appears to be not!.</p> <p>I have searched it for 3 days with no luck, any help would be much appreciated. </p>
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    1. USDavid K.
    1. USAhmad Sabbagh
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    1. COhttp://ttlnews.blogspot.com/2010/01/attacking-memory-problems-on-android.html
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