Question

hello friends

i have develop one application in which i have lots of images and sound,

i can release sound easily by release() method but i can’t able to release image.
can you tell me how can i release image ?
earlier i have use system.gc() function but it is not working for image i thing it is garbage collector.
second thing is that can you give me precaution step against memory management (regarding of image,sound & codeing part also)

Thanks
nik

Answer 1

Invocations of System.gc() are only suggestions to run the garbage collector. The GC need not run immediately.

I believe such complex applications would benefit from using an MVC model. The Model (or logic) class can save the required images and sounds to a cache folder, and just pass the list of file paths to the view (Activity) which can read and display on-demand, de-referencing any assets that are no longer required.

Also, it would help to reduce the asset sizes (images and sounds) by lowering resolutions (image) or downsampling (audio), wherever possible.

Update:
– For downsampling images, check this link: http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html#inSampleSize

MVC is slightly tougher to implement in Android due to the fact that Activities are the entry points. So, what can be done is that a singleton “Model” object can be created, which can be accessed from anywhere. Similarly, a singleton “Controller” object can also be created. The activity can notify the controller when it requires an asset, and the controller will forward the request to the model.