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POOutOfMemory Exception when creating Bitmap from OSM MapView
 

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  1. POOutOfMemory Exception when creating Bitmap from OSM MapView
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    <p>I have a problem when creating a bitmap from a MapView (osmdroid). This map takes almost the entire screen of a phone (always in portrait mode). I want to create a bitmap from a square of the center of the displayed map (side size : the screen width) and save it in a file to use it after in my app.</p> <p>A picture says more than a thousand words so I drew this :</p> <p><img src="https://i.stack.imgur.com/JiZAk.png" alt="enter image description here"></p> <p>This is the method I use to get the bitmap :</p> <pre><code>public static Bitmap loadBitmapFromMapView(final MapView mapview, final int width, final int height) { Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); mapview.setDrawingCacheEnabled(true); b = Bitmap.createBitmap(mapview.getDrawingCache(), 0, ((height - width) / 2), width, width); mapview.setDrawingCacheEnabled(false); return b; } </code></pre> <p>And then :</p> <pre><code>public static File saveBitmapAsFile(final Bitmap bmp) { if (mSaveDirectory == null || !mSaveDirectory.exists()) { final ContextWrapper cWrapper = new ContextWrapper(getApplicationContext()); mSaveDirectory = cWrapper.getFilesDir(); if (!mSaveDirectory.exists()) { mSaveDirectory.mkdirs(); } } try { final String imageName = "Image_" + System.currentTimeMillis() + ".png"; final File file = new File(mSaveDirectory, imageName); final FileOutputStream out = getApplicationContext().openFileOutput(imageName, Context.MODE_WORLD_READABLE); bmp.compress(Bitmap.CompressFormat.PNG, 90, out); out.flush(); out.close(); return file; } catch (final Exception e) { e.printStackTrace(); } return null; } </code></pre> <p>The problem is in my first method, two times out of three, I have a OutOfMemoryException at this line :</p> <pre><code>b = Bitmap.createBitmap(mapview.getDrawingCache(), 0, ((height - width) / 2), width, width); </code></pre> <p>When the exception isn't thrown, it works well and my map is saved in the good format.</p> <p>I searched a lot but I didn't find a solution that work and resolve the OutOfMemory error on a createBitmap from a view.</p> <p>If you know a way to solve it, it would be great, ask me if you need more informations and sorry for my English.</p> <p>Thanks !</p> <p>Aenur56</p>
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    1. COThis question is asked several times a day. All of the possible answers have already been given. Search for out of memory error here and you will find hundreds of questions and answers.
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      1. USSimon
    2. COpossible duplicate of [Strange out of memory issue while loading an image to a Bitmap object](http://stackoverflow.com/questions/477572/strange-out-of-memory-issue-while-loading-an-image-to-a-bitmap-object)
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      1. USSimon
    3. COAll topics I found were about bitmap get from files. I didn't found anything relevant about getting bitmap from a view :/
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