Name: Google I/O 2011: Memory management for Android Apps
Uploaded: 2014-06-12T17:33:06.000Z
Duration: 58 min 42 s
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PATRICK DUBROY: Hi everybody, my name's Patrick Dubroy and

today I'm going to talk to you about memory

So I'm really happy to see so many people here who care

So I'm sure you all remember this device.

Hugo talked about it in the keynote yesterday.

It was released about two and a half years ago.

So, is there anybody here who actually developed on the G1?

So you may remember that the G1 came with 192

And in fact, most of that was used up by the system.

There wasn't a whole lot left over for apps.

Fast forward a few years later, we have the Motorola

Zoom released just a couple of months ago.

Now some people might hear this and think, OK, my

I never have to worry about memory management again.

And of course, given that we have a whole room here, you

guys are all smart people and you realize

And there are a couple of reasons for this.

First of all, the Zoom has six and a half times the

The other thing is that on tablets, you really want to

You know, the rich, immersive applications, like this

Also, the Zoom we're talking about a pretty new device.

This is basically bleeding edge hardware.

Most your customers are not going to be using something

So of course, you want to support people who are using

Finally, maybe you're all familiar with Parkinson's Law,

which says that work always take as much time as you have.

And really, it's kind of the same for software.

So, no matter how much memory you have, you're going to find

a way to use it and wish you had just a little bit more.

What I want to talk about today are basically two

First of all, I want to cover some of the changes that we've

made in Gingerbread and Honeycomb that affect how your

All right, so as I was saying, there are two different things

So first of all, I want to talk about some of the changes

we've made in Gingerbread and Honeycomb that affect how your

And basically, memory management in general.

In the second half of the talk I want to talk about some

tools you can use to better understand how your app is

And if you have memory leaks, how you can figure out where

So just to set expectations for this talk, I'm going to

make them some assumptions about the stuff you've done

and it'll really help you get the most out of this if you're

So I'm hoping that you've all written Android apps before.

And it looked like about half the room had developed on the

I hope that most of you have heard of the Dalvik heap.

You have a basic idea of what I'm talking about when I talk

I'm sure you're familiar with the garbage collector.

You have a basic idea hopefully of what garbage

And probably, most of you have seen an OutOfMememoryError

before and you have a basic idea of why you get it and

So you may know that in Android, there's a hard limit

So first of all, one of the great features of Android is

So you actually have multiple programs running at once.

And so obviously, each one can't use all of

We also don't want a runaway app to just start getting

bigger and bigger and bloating the entire system.

You always want your dialer to work, your launcher t work,

So there's this hard limit on heap size and if your

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Google I/O 2011: Memory management for Android Apps

basically

audience

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application