Question

On the Android Emulator, when I exit my app and run it again immediately, I get

OutOfMemoryError: bitmap size exceeds VM budget.

But on the device itself, this does not happen. Why?

Answer 1

On a emulator the default max heap size is around 13MB.

On a device, it depends of the phone and of the android version. On my Motorola Droid, the max heap size is around 21-22MB and on my HTC Desire it’s around 32MB.

That’s why you have a crash on the emulator and not on your device.

If you want to monitor the heap size of your application you can call a similar method:

protected void displayMemoryUsage(String message) {
    int usedKBytes = (int) (Debug.getNativeHeapAllocatedSize() / 1024L);
    String usedMegsString = String.format("%s - usedMemory = Memory Used: %d KB", message, usedKBytes);
    Log.d(TAG, usedMegsString);
}